#include "real.h"
#include "rtl.h"
#include "tree.h"
+#include "tree-gimple.h"
#include "flags.h"
#include "regs.h"
#include "hard-reg-set.h"
#include "tm_p.h"
#include "target.h"
#include "langhooks.h"
+#include "basic-block.h"
#define CALLED_AS_BUILT_IN(NODE) \
(!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10))
tree built_in_decls[(int) END_BUILTINS];
/* Declarations used when constructing the builtin implicitly in the compiler.
It may be NULL_TREE when this is invalid (for instance runtime is not
- required to implement the function call in all cases. */
+ required to implement the function call in all cases). */
tree implicit_built_in_decls[(int) END_BUILTINS];
static int get_pointer_alignment (tree, unsigned int);
-static tree c_strlen (tree, int);
static const char *c_getstr (tree);
static rtx c_readstr (const char *, enum machine_mode);
static int target_char_cast (tree, char *);
static rtx result_vector (int, rtx);
#endif
static rtx expand_builtin_setjmp (tree, rtx);
+static void expand_builtin_update_setjmp_buf (rtx);
static void expand_builtin_prefetch (tree);
static rtx expand_builtin_apply_args (void);
static rtx expand_builtin_apply_args_1 (void);
static void expand_errno_check (tree, rtx);
static rtx expand_builtin_mathfn (tree, rtx, rtx);
static rtx expand_builtin_mathfn_2 (tree, rtx, rtx);
-static rtx expand_builtin_constant_p (tree, enum machine_mode);
+static rtx expand_builtin_mathfn_3 (tree, rtx, rtx);
static rtx expand_builtin_args_info (tree);
static rtx expand_builtin_next_arg (tree);
static rtx expand_builtin_va_start (tree);
static tree fold_trunc_transparent_mathfn (tree);
static bool readonly_data_expr (tree);
static rtx expand_builtin_fabs (tree, rtx, rtx);
-static rtx expand_builtin_cabs (tree, rtx);
static rtx expand_builtin_signbit (tree, rtx);
-static tree fold_builtin_cabs (tree, tree, tree);
+static tree fold_builtin_cabs (tree, tree);
static tree fold_builtin_trunc (tree);
static tree fold_builtin_floor (tree);
static tree fold_builtin_ceil (tree);
static tree fold_builtin_memcpy (tree);
static tree fold_builtin_mempcpy (tree);
static tree fold_builtin_memmove (tree);
-static tree fold_builtin_strcpy (tree);
-static tree fold_builtin_strncpy (tree);
+static tree fold_builtin_strchr (tree, bool);
static tree fold_builtin_memcmp (tree);
static tree fold_builtin_strcmp (tree);
static tree fold_builtin_strncmp (tree);
static tree fold_builtin_signbit (tree);
+static tree fold_builtin_copysign (tree, tree);
+static tree fold_builtin_isascii (tree);
+static tree fold_builtin_toascii (tree);
+static tree fold_builtin_isdigit (tree);
+static tree fold_builtin_fabs (tree, tree);
+static tree fold_builtin_abs (tree, tree);
+static tree fold_builtin_unordered_cmp (tree, enum tree_code, enum tree_code);
+static tree fold_builtin_1 (tree, bool);
+
+static tree simplify_builtin_strpbrk (tree);
+static tree simplify_builtin_strstr (tree);
+static tree simplify_builtin_strchr (tree);
+static tree simplify_builtin_strrchr (tree);
+static tree simplify_builtin_strcat (tree);
+static tree simplify_builtin_strncat (tree);
+static tree simplify_builtin_strspn (tree);
+static tree simplify_builtin_strcspn (tree);
+static void simplify_builtin_next_arg (tree);
+static void simplify_builtin_va_start (tree);
+static tree simplify_builtin_sprintf (tree, int);
+
/* Return the alignment in bits of EXP, a pointer valued expression.
But don't return more than MAX_ALIGN no matter what.
Unfortunately, string_constant can't access the values of const char
arrays with initializers, so neither can we do so here. */
-static tree
+tree
c_strlen (tree src, int only_value)
{
tree offset_node;
len1 = c_strlen (TREE_OPERAND (src, 1), only_value);
len2 = c_strlen (TREE_OPERAND (src, 2), only_value);
- if (tree_int_cst_equal (len1, len2))
+ if (tree_int_cst_equal (len1, len2))
return len1;
}
HOST_WIDE_INT ch;
unsigned int i, j;
- if (GET_MODE_CLASS (mode) != MODE_INT)
- abort ();
+ gcc_assert (GET_MODE_CLASS (mode) == MODE_INT);
+
c[0] = 0;
c[1] = 0;
ch = 1;
&& GET_MODE_SIZE (mode) > UNITS_PER_WORD)
j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1;
j *= BITS_PER_UNIT;
- if (j > 2 * HOST_BITS_PER_WIDE_INT)
- abort ();
+ gcc_assert (j <= 2 * HOST_BITS_PER_WIDE_INT);
+
if (ch)
ch = (unsigned char) str[i];
c[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT);
return 0;
}
+/* Similar to save_expr, but assumes that arbitrary code is not executed
+ in between the multiple evaluations. In particular, we assume that a
+ non-addressable local variable will not be modified. */
+
+static tree
+builtin_save_expr (tree exp)
+{
+ if (TREE_ADDRESSABLE (exp) == 0
+ && (TREE_CODE (exp) == PARM_DECL
+ || (TREE_CODE (exp) == VAR_DECL && !TREE_STATIC (exp))))
+ return exp;
+
+ return save_expr (exp);
+}
+
/* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT
times to get the address of either a higher stack frame, or a return
address located within it (depending on FNDECL_CODE). */
buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX));
- emit_queue ();
-
/* We store the frame pointer and the address of receiver_label in
the buffer and use the rest of it for the stack save area, which
is machine-dependent. */
-#ifndef BUILTIN_SETJMP_FRAME_VALUE
-#define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx
-#endif
-
mem = gen_rtx_MEM (Pmode, buf_addr);
set_mem_alias_set (mem, setjmp_alias_set);
- emit_move_insn (mem, BUILTIN_SETJMP_FRAME_VALUE);
+ emit_move_insn (mem, targetm.builtin_setjmp_frame_value ());
mem = gen_rtx_MEM (Pmode, plus_constant (buf_addr, GET_MODE_SIZE (Pmode))),
set_mem_alias_set (mem, setjmp_alias_set);
emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx));
/* Now put in the code to restore the frame pointer, and argument
- pointer, if needed. The code below is from expand_end_bindings
- in stmt.c; see detailed documentation there. */
+ pointer, if needed. */
#ifdef HAVE_nonlocal_goto
if (! HAVE_nonlocal_goto)
#endif
if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
return NULL_RTX;
- if (target == 0 || GET_CODE (target) != REG
+ if (target == 0 || !REG_P (target)
|| REGNO (target) < FIRST_PSEUDO_REGISTER)
target = gen_reg_rtx (TYPE_MODE (integer_type_node));
a second argument of 1, because that is what builtin_setjmp will
return. This also makes EH slightly more efficient, since we are no
longer copying around a value that we don't care about. */
- if (value != const1_rtx)
- abort ();
+ gcc_assert (value == const1_rtx);
current_function_calls_longjmp = 1;
internal exception handling use only. */
for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
{
- if (insn == last)
- abort ();
- if (GET_CODE (insn) == JUMP_INSN)
+ gcc_assert (insn != last);
+
+ if (JUMP_P (insn))
{
REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
REG_NOTES (insn));
break;
}
- else if (GET_CODE (insn) == CALL_INSN)
+ else if (CALL_P (insn))
+ break;
+ }
+}
+
+/* Expand a call to __builtin_nonlocal_goto. We're passed the target label
+ and the address of the save area. */
+
+static rtx
+expand_builtin_nonlocal_goto (tree arglist)
+{
+ tree t_label, t_save_area;
+ rtx r_label, r_save_area, r_fp, r_sp, insn;
+
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ t_label = TREE_VALUE (arglist);
+ arglist = TREE_CHAIN (arglist);
+ t_save_area = TREE_VALUE (arglist);
+
+ r_label = expand_expr (t_label, NULL_RTX, VOIDmode, 0);
+ r_label = convert_memory_address (Pmode, r_label);
+ r_save_area = expand_expr (t_save_area, NULL_RTX, VOIDmode, 0);
+ r_save_area = convert_memory_address (Pmode, r_save_area);
+ r_fp = gen_rtx_MEM (Pmode, r_save_area);
+ r_sp = gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL),
+ plus_constant (r_save_area, GET_MODE_SIZE (Pmode)));
+
+ current_function_has_nonlocal_goto = 1;
+
+#if HAVE_nonlocal_goto
+ /* ??? We no longer need to pass the static chain value, afaik. */
+ if (HAVE_nonlocal_goto)
+ emit_insn (gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp));
+ else
+#endif
+ {
+ r_label = copy_to_reg (r_label);
+
+ emit_insn (gen_rtx_CLOBBER (VOIDmode,
+ gen_rtx_MEM (BLKmode,
+ gen_rtx_SCRATCH (VOIDmode))));
+
+ emit_insn (gen_rtx_CLOBBER (VOIDmode,
+ gen_rtx_MEM (BLKmode,
+ hard_frame_pointer_rtx)));
+
+ /* Restore frame pointer for containing function.
+ This sets the actual hard register used for the frame pointer
+ to the location of the function's incoming static chain info.
+ The non-local goto handler will then adjust it to contain the
+ proper value and reload the argument pointer, if needed. */
+ emit_move_insn (hard_frame_pointer_rtx, r_fp);
+ emit_stack_restore (SAVE_NONLOCAL, r_sp, NULL_RTX);
+
+ /* USE of hard_frame_pointer_rtx added for consistency;
+ not clear if really needed. */
+ emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
+ emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
+ emit_indirect_jump (r_label);
+ }
+
+ /* Search backwards to the jump insn and mark it as a
+ non-local goto. */
+ for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
+ {
+ if (JUMP_P (insn))
+ {
+ REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO,
+ const0_rtx, REG_NOTES (insn));
+ break;
+ }
+ else if (CALL_P (insn))
break;
}
+
+ return const0_rtx;
+}
+
+/* __builtin_update_setjmp_buf is passed a pointer to an array of five words
+ (not all will be used on all machines) that was passed to __builtin_setjmp.
+ It updates the stack pointer in that block to correspond to the current
+ stack pointer. */
+
+static void
+expand_builtin_update_setjmp_buf (rtx buf_addr)
+{
+ enum machine_mode sa_mode = Pmode;
+ rtx stack_save;
+
+
+#ifdef HAVE_save_stack_nonlocal
+ if (HAVE_save_stack_nonlocal)
+ sa_mode = insn_data[(int) CODE_FOR_save_stack_nonlocal].operand[0].mode;
+#endif
+#ifdef STACK_SAVEAREA_MODE
+ sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
+#endif
+
+ stack_save
+ = gen_rtx_MEM (sa_mode,
+ memory_address
+ (sa_mode,
+ plus_constant (buf_addr, 2 * GET_MODE_SIZE (Pmode))));
+
+#ifdef HAVE_setjmp
+ if (HAVE_setjmp)
+ emit_insn (gen_setjmp ());
+#endif
+
+ emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
}
/* Expand a call to __builtin_prefetch. For a target that does not support
if (TREE_CHAIN (TREE_CHAIN (arglist)))
arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
else
- arg2 = build_int_2 (3, 0);
+ arg2 = build_int_cst (NULL_TREE, 3);
}
else
{
arg1 = integer_zero_node;
- arg2 = build_int_2 (3, 0);
+ arg2 = build_int_cst (NULL_TREE, 3);
}
/* Argument 0 is an address. */
}
emit_insn (gen_prefetch (op0, op1, op2));
}
- else
#endif
- op0 = protect_from_queue (op0, 0);
+
/* Don't do anything with direct references to volatile memory, but
generate code to handle other side effects. */
- if (GET_CODE (op0) != MEM && side_effects_p (op0))
+ if (!MEM_P (op0) && side_effects_p (op0))
emit_insn (op0);
}
/* Get a MEM rtx for expression EXP which is the address of an operand
- to be used to be used in a string instruction (cmpstrsi, movstrsi, ..). */
+ to be used to be used in a string instruction (cmpstrsi, movmemsi, ..). */
static rtx
get_memory_rtx (tree exp)
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (FUNCTION_ARG_REGNO_P (regno))
{
- /* Search for the proper mode for copying this register's
- value. I'm not sure this is right, but it works so far. */
- enum machine_mode best_mode = VOIDmode;
-
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && hard_regno_nregs[regno][mode] == 1)
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- mode = best_mode;
- if (mode == VOIDmode)
- abort ();
+ mode = reg_raw_mode[regno];
+
+ gcc_assert (mode != VOIDmode);
align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
if (size % align != 0)
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (FUNCTION_VALUE_REGNO_P (regno))
{
- /* Search for the proper mode for copying this register's
- value. I'm not sure this is right, but it works so far. */
- enum machine_mode best_mode = VOIDmode;
-
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
- mode != TImode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- mode = best_mode;
- if (mode == VOIDmode)
- abort ();
+ mode = reg_raw_mode[regno];
+
+ gcc_assert (mode != VOIDmode);
align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
if (size % align != 0)
NULL_RTX);
#endif
emit_move_insn (adjust_address (registers, Pmode, 0), tem);
-
+
size = GET_MODE_SIZE (Pmode);
/* Save the structure value address unless this is passed as an
chain current, so the code is placed at the start of the
function. */
push_topmost_sequence ();
- emit_insn_before (seq, NEXT_INSN (get_insns ()));
+ emit_insn_before (seq, NEXT_INSN (entry_of_function ()));
pop_topmost_sequence ();
return temp;
}
incoming_args, 0, OPTAB_LIB_WIDEN);
#endif
- /* Perform postincrements before actually calling the function. */
- emit_queue ();
-
/* Push a new argument block and copy the arguments. Do not allow
the (potential) memcpy call below to interfere with our stack
manipulations. */
rtx value = gen_reg_rtx (Pmode);
emit_move_insn (value, adjust_address (arguments, Pmode, size));
emit_move_insn (struct_value, value);
- if (GET_CODE (struct_value) == REG)
+ if (REG_P (struct_value))
use_reg (&call_fusage, struct_value);
size += GET_MODE_SIZE (Pmode);
}
/* All arguments and registers used for the call are set up by now! */
- function = prepare_call_address (function, NULL_TREE, &call_fusage, 0, 0);
+ function = prepare_call_address (function, NULL, &call_fusage, 0, 0);
/* Ensure address is valid. SYMBOL_REF is already valid, so no need,
and we don't want to load it into a register as an optimization,
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if ((mode = apply_result_mode[regno]) != VOIDmode)
{
- if (valreg)
- abort (); /* HAVE_untyped_call required. */
+ gcc_assert (!valreg); /* HAVE_untyped_call required. */
+
valreg = gen_rtx_REG (mode, regno);
}
}
else
#endif
- abort ();
+ gcc_unreachable ();
/* Find the CALL insn we just emitted, and attach the register usage
information. */
return GEN_INT (no_type_class);
}
-/* Expand expression EXP, which is a call to __builtin_constant_p. */
-
-static rtx
-expand_builtin_constant_p (tree arglist, enum machine_mode target_mode)
-{
- rtx tmp;
-
- if (arglist == 0)
- return const0_rtx;
- arglist = TREE_VALUE (arglist);
-
- /* We have taken care of the easy cases during constant folding. This
- case is not obvious, so emit (constant_p_rtx (ARGLIST)) and let CSE
- get a chance to see if it can deduce whether ARGLIST is constant.
- If CSE isn't going to run, of course, don't bother waiting. */
-
- if (cse_not_expected)
- return const0_rtx;
-
- current_function_calls_constant_p = 1;
-
- tmp = expand_expr (arglist, NULL_RTX, VOIDmode, 0);
- tmp = gen_rtx_CONSTANT_P_RTX (target_mode, tmp);
- return tmp;
-}
-
/* This helper macro, meant to be used in mathfn_built_in below,
determines which among a set of three builtin math functions is
appropriate for a given type mode. The `F' and `L' cases are
tree
mathfn_built_in (tree type, enum built_in_function fn)
{
- const enum machine_mode type_mode = TYPE_MODE (type);
enum built_in_function fcode, fcodef, fcodel;
switch (fn)
return 0;
}
- if (type_mode == TYPE_MODE (double_type_node))
+ if (TYPE_MAIN_VARIANT (type) == double_type_node)
return implicit_built_in_decls[fcode];
- else if (type_mode == TYPE_MODE (float_type_node))
+ else if (TYPE_MAIN_VARIANT (type) == float_type_node)
return implicit_built_in_decls[fcodef];
- else if (type_mode == TYPE_MODE (long_double_type_node))
+ else if (TYPE_MAIN_VARIANT (type) == long_double_type_node)
return implicit_built_in_decls[fcodel];
else
return 0;
}
-/* Expand a call to one of the builtin math functions (sin, cos, or sqrt).
+/* Expand a call to one of the builtin math functions (sqrt, exp, or log).
Return 0 if a normal call should be emitted rather than expanding the
function in-line. EXP is the expression that is a call to the builtin
function; if convenient, the result should be placed in TARGET.
switch (DECL_FUNCTION_CODE (fndecl))
{
- case BUILT_IN_SIN:
- case BUILT_IN_SINF:
- case BUILT_IN_SINL:
- builtin_optab = sin_optab; break;
- case BUILT_IN_COS:
- case BUILT_IN_COSF:
- case BUILT_IN_COSL:
- builtin_optab = cos_optab; break;
case BUILT_IN_SQRT:
case BUILT_IN_SQRTF:
case BUILT_IN_SQRTL:
case BUILT_IN_EXPF:
case BUILT_IN_EXPL:
errno_set = true; builtin_optab = exp_optab; break;
+ case BUILT_IN_EXP10:
+ case BUILT_IN_EXP10F:
+ case BUILT_IN_EXP10L:
+ case BUILT_IN_POW10:
+ case BUILT_IN_POW10F:
+ case BUILT_IN_POW10L:
+ errno_set = true; builtin_optab = exp10_optab; break;
+ case BUILT_IN_EXP2:
+ case BUILT_IN_EXP2F:
+ case BUILT_IN_EXP2L:
+ errno_set = true; builtin_optab = exp2_optab; break;
+ case BUILT_IN_EXPM1:
+ case BUILT_IN_EXPM1F:
+ case BUILT_IN_EXPM1L:
+ errno_set = true; builtin_optab = expm1_optab; break;
+ case BUILT_IN_LOGB:
+ case BUILT_IN_LOGBF:
+ case BUILT_IN_LOGBL:
+ errno_set = true; builtin_optab = logb_optab; break;
+ case BUILT_IN_ILOGB:
+ case BUILT_IN_ILOGBF:
+ case BUILT_IN_ILOGBL:
+ errno_set = true; builtin_optab = ilogb_optab; break;
case BUILT_IN_LOG:
case BUILT_IN_LOGF:
case BUILT_IN_LOGL:
case BUILT_IN_LOG2F:
case BUILT_IN_LOG2L:
errno_set = true; builtin_optab = log2_optab; break;
+ case BUILT_IN_LOG1P:
+ case BUILT_IN_LOG1PF:
+ case BUILT_IN_LOG1PL:
+ errno_set = true; builtin_optab = log1p_optab; break;
+ case BUILT_IN_ASIN:
+ case BUILT_IN_ASINF:
+ case BUILT_IN_ASINL:
+ builtin_optab = asin_optab; break;
+ case BUILT_IN_ACOS:
+ case BUILT_IN_ACOSF:
+ case BUILT_IN_ACOSL:
+ builtin_optab = acos_optab; break;
case BUILT_IN_TAN:
case BUILT_IN_TANF:
case BUILT_IN_TANL:
case BUILT_IN_NEARBYINTF:
case BUILT_IN_NEARBYINTL:
builtin_optab = nearbyint_optab; break;
+ case BUILT_IN_RINT:
+ case BUILT_IN_RINTF:
+ case BUILT_IN_RINTL:
+ builtin_optab = rint_optab; break;
default:
- abort ();
+ gcc_unreachable ();
}
/* Make a suitable register to place result in. */
/* Wrap the computation of the argument in a SAVE_EXPR, as we may
need to expand the argument again. This way, we will not perform
side-effects more the once. */
- narg = save_expr (arg);
+ narg = builtin_save_expr (arg);
if (narg != arg)
{
arglist = build_tree_list (NULL_TREE, arg);
op0 = expand_expr (arg, subtarget, VOIDmode, 0);
- emit_queue ();
start_sequence ();
/* Compute into TARGET.
rtx operand = XEXP (XEXP (XEXP (note, 0), 1), 0);
/* Check operand is a register with expected mode. */
if (operand
- && GET_CODE (operand) == REG
+ && REG_P (operand)
&& GET_MODE (operand) == mode)
{
/* Replace the REG_EQUAL note with a SQRT rtx. */
case BUILT_IN_ATAN2F:
case BUILT_IN_ATAN2L:
builtin_optab = atan2_optab; break;
+ case BUILT_IN_FMOD:
+ case BUILT_IN_FMODF:
+ case BUILT_IN_FMODL:
+ builtin_optab = fmod_optab; break;
+ case BUILT_IN_DREM:
+ case BUILT_IN_DREMF:
+ case BUILT_IN_DREML:
+ builtin_optab = drem_optab; break;
default:
- abort ();
+ gcc_unreachable ();
}
/* Make a suitable register to place result in. */
if (! flag_errno_math || ! HONOR_NANS (mode))
errno_set = false;
- /* Alway stabilize the argument list. */
- narg = save_expr (arg1);
+ /* Always stabilize the argument list. */
+ narg = builtin_save_expr (arg1);
if (narg != arg1)
{
temp = build_tree_list (NULL_TREE, narg);
else
temp = TREE_CHAIN (arglist);
- narg = save_expr (arg0);
+ narg = builtin_save_expr (arg0);
if (narg != arg0)
{
arglist = tree_cons (NULL_TREE, narg, temp);
op0 = expand_expr (arg0, subtarget, VOIDmode, 0);
op1 = expand_expr (arg1, 0, VOIDmode, 0);
- emit_queue ();
start_sequence ();
/* Compute into TARGET.
return target;
}
+/* Expand a call to the builtin sin and cos math functions.
+ Return 0 if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's
+ operands. */
+
+static rtx
+expand_builtin_mathfn_3 (tree exp, rtx target, rtx subtarget)
+{
+ optab builtin_optab;
+ rtx op0, insns, before_call;
+ tree fndecl = get_callee_fndecl (exp);
+ tree arglist = TREE_OPERAND (exp, 1);
+ enum machine_mode mode;
+ bool errno_set = false;
+ tree arg, narg;
+
+ if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ return 0;
+
+ arg = TREE_VALUE (arglist);
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_SIN:
+ case BUILT_IN_SINF:
+ case BUILT_IN_SINL:
+ case BUILT_IN_COS:
+ case BUILT_IN_COSF:
+ case BUILT_IN_COSL:
+ builtin_optab = sincos_optab; break;
+ default:
+ gcc_unreachable ();
+ }
+
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
+
+ if (! flag_errno_math || ! HONOR_NANS (mode))
+ errno_set = false;
+
+ /* Check if sincos insn is available, otherwise fallback
+ to sin or cos insn. */
+ if (builtin_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) {
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_SIN:
+ case BUILT_IN_SINF:
+ case BUILT_IN_SINL:
+ builtin_optab = sin_optab; break;
+ case BUILT_IN_COS:
+ case BUILT_IN_COSF:
+ case BUILT_IN_COSL:
+ builtin_optab = cos_optab; break;
+ default:
+ gcc_unreachable ();
+ }
+ }
+
+ /* Before working hard, check whether the instruction is available. */
+ if (builtin_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
+ {
+ target = gen_reg_rtx (mode);
+
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ narg = save_expr (arg);
+ if (narg != arg)
+ {
+ arglist = build_tree_list (NULL_TREE, arg);
+ exp = build_function_call_expr (fndecl, arglist);
+ }
+
+ op0 = expand_expr (arg, subtarget, VOIDmode, 0);
+
+ start_sequence ();
+
+ /* Compute into TARGET.
+ Set TARGET to wherever the result comes back. */
+ if (builtin_optab == sincos_optab)
+ {
+ int result;
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_SIN:
+ case BUILT_IN_SINF:
+ case BUILT_IN_SINL:
+ result = expand_twoval_unop (builtin_optab, op0, 0, target, 0);
+ break;
+ case BUILT_IN_COS:
+ case BUILT_IN_COSF:
+ case BUILT_IN_COSL:
+ result = expand_twoval_unop (builtin_optab, op0, target, 0, 0);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+ gcc_assert (result);
+ }
+ else
+ {
+ target = expand_unop (mode, builtin_optab, op0, target, 0);
+ }
+
+ if (target != 0)
+ {
+ if (errno_set)
+ expand_errno_check (exp, target);
+
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+ return target;
+ }
+
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns) and call to the library function
+ with the stabilized argument list. */
+ end_sequence ();
+ }
+
+ before_call = get_last_insn ();
+
+ target = expand_call (exp, target, target == const0_rtx);
+
+ return target;
+}
+
/* To evaluate powi(x,n), the floating point value x raised to the
constant integer exponent n, we use a hybrid algorithm that
combines the "window method" with look-up tables. For an
multiplications to inline before calling the system library's pow
function. powi(x,n) requires at worst 2*bits(n)-2 multiplications,
so this default never requires calling pow, powf or powl. */
-
+
#ifndef POWI_MAX_MULTS
#define POWI_MAX_MULTS (2*HOST_BITS_PER_WIDE_INT-2)
#endif
result++;
}
}
-
+
return result + powi_lookup_cost (val, cache);
}
/* Expand the RTL to evaluate powi(x,n) in mode MODE. X is the
floating point operand in mode MODE, and N is the exponent. This
function needs to be kept in sync with powi_cost above. */
-
+
static rtx
expand_powi (rtx x, enum machine_mode mode, HOST_WIDE_INT n)
{
/* Make a place to write the result of the instruction. */
result = target;
if (! (result != 0
- && GET_CODE (result) == REG
+ && REG_P (result)
&& GET_MODE (result) == insn_mode
&& REGNO (result) >= FIRST_PSEUDO_REGISTER))
result = gen_reg_rtx (insn_mode);
else
{
tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
+ tree fn, tmp;
const char *p1, *p2;
p2 = c_getstr (s2);
return const0_rtx;
/* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, convert (TREE_TYPE (s1),
- ssize_int (r - p1)))),
- target, mode, EXPAND_NORMAL);
+ tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
+ fold_convert (TREE_TYPE (s1),
+ ssize_int (r - p1))));
+ return expand_expr (tmp, target, mode, EXPAND_NORMAL);
}
if (p2[0] == '\0')
/* New argument list transforming strstr(s1, s2) to
strchr(s1, s2[0]). */
- arglist =
- build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
+ arglist = build_tree_list (NULL_TREE,
+ build_int_cst (NULL_TREE, p2[0]));
arglist = tree_cons (NULL_TREE, s1, arglist);
return expand_expr (build_function_call_expr (fn, arglist),
target, mode, EXPAND_NORMAL);
{
char c;
const char *r;
+ tree tmp;
if (target_char_cast (s2, &c))
return 0;
return const0_rtx;
/* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, convert (TREE_TYPE (s1),
- ssize_int (r - p1)))),
- target, mode, EXPAND_NORMAL);
+ tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
+ fold_convert (TREE_TYPE (s1),
+ ssize_int (r - p1))));
+ return expand_expr (tmp, target, mode, EXPAND_NORMAL);
}
/* FIXME: Should use here strchrM optab so that ports can optimize
else
{
tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
+ tree fn, tmp;
const char *p1;
if (TREE_CODE (s2) != INTEGER_CST)
return const0_rtx;
/* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, convert (TREE_TYPE (s1),
- ssize_int (r - p1)))),
- target, mode, EXPAND_NORMAL);
+ tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
+ fold_convert (TREE_TYPE (s1),
+ ssize_int (r - p1))));
+ return expand_expr (tmp, target, mode, EXPAND_NORMAL);
}
if (! integer_zerop (s2))
else
{
tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
+ tree fn, tmp;
const char *p1, *p2;
p2 = c_getstr (s2);
return const0_rtx;
/* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, convert (TREE_TYPE (s1),
- ssize_int (r - p1)))),
- target, mode, EXPAND_NORMAL);
+ tmp = fold (build2 (PLUS_EXPR, TREE_TYPE (s1), s1,
+ fold_convert (TREE_TYPE (s1),
+ ssize_int (r - p1))));
+ return expand_expr (tmp, target, mode, EXPAND_NORMAL);
}
if (p2[0] == '\0')
/* New argument list transforming strpbrk(s1, s2) to
strchr(s1, s2[0]). */
- arglist =
- build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
+ arglist = build_tree_list (NULL_TREE,
+ build_int_cst (NULL_TREE, p2[0]));
arglist = tree_cons (NULL_TREE, s1, arglist);
return expand_expr (build_function_call_expr (fn, arglist),
target, mode, EXPAND_NORMAL);
{
const char *str = (const char *) data;
- if (offset < 0
- || ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
- > strlen (str) + 1))
- abort (); /* Attempt to read past the end of constant string. */
+ gcc_assert (offset >= 0
+ && ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
+ <= strlen (str) + 1));
return c_readstr (str + offset, mode);
}
}
if (endp == 2)
- len = fold (build (MINUS_EXPR, TREE_TYPE (len), dest,
- integer_one_node));
- len = convert (TREE_TYPE (dest), len);
- expr = fold (build (PLUS_EXPR, TREE_TYPE (dest), dest, len));
+ len = fold (build2 (MINUS_EXPR, TREE_TYPE (len), len,
+ integer_one_node));
+ len = fold_convert (TREE_TYPE (dest), len);
+ expr = fold (build2 (PLUS_EXPR, TREE_TYPE (dest), dest, len));
return expand_expr (expr, target, mode, EXPAND_NORMAL);
}
/* If LEN is not constant, call the normal function. */
if (! host_integerp (len, 1))
return 0;
-
+
/* If the LEN parameter is zero, return DEST. */
if (tree_low_cst (len, 1) == 0)
{
so that if it isn't expanded inline, we fallback to
calling bcopy instead of memmove. */
- newarglist = build_tree_list (NULL_TREE, convert (sizetype, size));
+ newarglist = build_tree_list (NULL_TREE, fold_convert (sizetype, size));
newarglist = tree_cons (NULL_TREE, src, newarglist);
newarglist = tree_cons (NULL_TREE, dest, newarglist);
return expand_builtin_memmove (newarglist, const0_rtx, VOIDmode);
}
+#ifndef HAVE_movstr
+# define HAVE_movstr 0
+# define CODE_FOR_movstr CODE_FOR_nothing
+#endif
+
+/* Expand into a movstr instruction, if one is available. Return 0 if
+ we failed, the caller should emit a normal call, otherwise try to
+ get the result in TARGET, if convenient. If ENDP is 0 return the
+ destination pointer, if ENDP is 1 return the end pointer ala
+ mempcpy, and if ENDP is 2 return the end pointer minus one ala
+ stpcpy. */
+
+static rtx
+expand_movstr (tree dest, tree src, rtx target, int endp)
+{
+ rtx end;
+ rtx dest_mem;
+ rtx src_mem;
+ rtx insn;
+ const struct insn_data * data;
+
+ if (!HAVE_movstr)
+ return 0;
+
+ dest_mem = get_memory_rtx (dest);
+ src_mem = get_memory_rtx (src);
+ if (!endp)
+ {
+ target = force_reg (Pmode, XEXP (dest_mem, 0));
+ dest_mem = replace_equiv_address (dest_mem, target);
+ end = gen_reg_rtx (Pmode);
+ }
+ else
+ {
+ if (target == 0 || target == const0_rtx)
+ {
+ end = gen_reg_rtx (Pmode);
+ if (target == 0)
+ target = end;
+ }
+ else
+ end = target;
+ }
+
+ data = insn_data + CODE_FOR_movstr;
+
+ if (data->operand[0].mode != VOIDmode)
+ end = gen_lowpart (data->operand[0].mode, end);
+
+ insn = data->genfun (end, dest_mem, src_mem);
+
+ gcc_assert (insn);
+
+ emit_insn (insn);
+
+ /* movstr is supposed to set end to the address of the NUL
+ terminator. If the caller requested a mempcpy-like return value,
+ adjust it. */
+ if (endp == 1 && target != const0_rtx)
+ emit_move_insn (target, plus_constant (gen_lowpart (GET_MODE (target),
+ end), 1));
+
+ return target;
+}
+
/* Expand expression EXP, which is a call to the strcpy builtin. Return 0
if we failed the caller should emit a normal call, otherwise try to get
the result in TARGET, if convenient (and in mode MODE if that's
if (operand_equal_p (src, dst, 0))
return expand_expr (dst, target, mode, EXPAND_NORMAL);
- fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
- if (!fn)
- return 0;
-
len = c_strlen (src, 1);
if (len == 0 || TREE_SIDE_EFFECTS (len))
+ return expand_movstr (TREE_VALUE (arglist),
+ TREE_VALUE (TREE_CHAIN (arglist)),
+ target, /*endp=*/0);
+
+ fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
return 0;
len = size_binop (PLUS_EXPR, len, ssize_int (1));
static rtx
expand_builtin_stpcpy (tree arglist, rtx target, enum machine_mode mode)
{
+ /* If return value is ignored, transform stpcpy into strcpy. */
+ if (target == const0_rtx)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+ if (!fn)
+ return 0;
+
+ return expand_expr (build_function_call_expr (fn, arglist),
+ target, mode, EXPAND_NORMAL);
+ }
+
if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
return 0;
else
{
- tree dst, src, len;
-
- /* If return value is ignored, transform stpcpy into strcpy. */
- if (target == const0_rtx)
- {
- tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
- if (!fn)
- return 0;
-
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
- }
+ tree dst, src, len, lenp1;
+ tree narglist;
+ rtx ret;
/* Ensure we get an actual string whose length can be evaluated at
compile-time, not an expression containing a string. This is
when used to produce the return value. */
src = TREE_VALUE (TREE_CHAIN (arglist));
if (! c_getstr (src) || ! (len = c_strlen (src, 0)))
- return 0;
+ return expand_movstr (TREE_VALUE (arglist),
+ TREE_VALUE (TREE_CHAIN (arglist)),
+ target, /*endp=*/2);
dst = TREE_VALUE (arglist);
- len = fold (size_binop (PLUS_EXPR, len, ssize_int (1)));
- arglist = build_tree_list (NULL_TREE, len);
- arglist = tree_cons (NULL_TREE, src, arglist);
- arglist = tree_cons (NULL_TREE, dst, arglist);
- return expand_builtin_mempcpy (arglist, target, mode, /*endp=*/2);
+ lenp1 = size_binop (PLUS_EXPR, len, ssize_int (1));
+ narglist = build_tree_list (NULL_TREE, lenp1);
+ narglist = tree_cons (NULL_TREE, src, narglist);
+ narglist = tree_cons (NULL_TREE, dst, narglist);
+ ret = expand_builtin_mempcpy (narglist, target, mode, /*endp=*/2);
+
+ if (ret)
+ return ret;
+
+ if (TREE_CODE (len) == INTEGER_CST)
+ {
+ rtx len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
+
+ if (GET_CODE (len_rtx) == CONST_INT)
+ {
+ ret = expand_builtin_strcpy (arglist, target, mode);
+
+ if (ret)
+ {
+ if (! target)
+ {
+ if (mode != VOIDmode)
+ target = gen_reg_rtx (mode);
+ else
+ target = gen_reg_rtx (GET_MODE (ret));
+ }
+ if (GET_MODE (target) != GET_MODE (ret))
+ ret = gen_lowpart (GET_MODE (target), ret);
+
+ ret = emit_move_insn (target,
+ plus_constant (ret,
+ INTVAL (len_rtx)));
+ gcc_assert (ret);
+
+ return target;
+ }
+ }
+ }
+
+ return expand_movstr (TREE_VALUE (arglist),
+ TREE_VALUE (TREE_CHAIN (arglist)),
+ target, /*endp=*/2);
}
}
so that if it isn't expanded inline, we fallback to
calling bzero instead of memset. */
- newarglist = build_tree_list (NULL_TREE, convert (sizetype, size));
+ newarglist = build_tree_list (NULL_TREE, fold_convert (sizetype, size));
newarglist = tree_cons (NULL_TREE, integer_zero_node, newarglist);
newarglist = tree_cons (NULL_TREE, dest, newarglist);
tree ind1 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
+ fold_convert (cst_uchar_ptr_node, arg1))));
tree ind2 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
+ fold_convert (cst_uchar_ptr_node, arg2))));
+ tree result = fold (build2 (MINUS_EXPR, integer_type_node, ind1, ind2));
return expand_expr (result, target, mode, EXPAND_NORMAL);
}
insn_mode = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode;
else
#endif
- return 0;
+ return 0;
/* If we don't have POINTER_TYPE, call the function. */
if (arg1_align == 0 || arg2_align == 0)
/* Make a place to write the result of the instruction. */
result = target;
if (! (result != 0
- && GET_CODE (result) == REG && GET_MODE (result) == insn_mode
+ && REG_P (result) && GET_MODE (result) == insn_mode
&& REGNO (result) >= FIRST_PSEUDO_REGISTER))
result = gen_reg_rtx (insn_mode);
GEN_INT (MIN (arg1_align, arg2_align)));
else
#endif
- abort ();
+ gcc_unreachable ();
if (insn)
emit_insn (insn);
XEXP (arg1_rtx, 0), Pmode,
XEXP (arg2_rtx, 0), Pmode,
convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
- TREE_UNSIGNED (sizetype)),
+ TYPE_UNSIGNED (sizetype)),
TYPE_MODE (sizetype));
/* Return the value in the proper mode for this function. */
tree ind1 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
+ fold_convert (cst_uchar_ptr_node, arg1))));
tree ind2 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
+ fold_convert (cst_uchar_ptr_node, arg2))));
+ tree result = fold (build2 (MINUS_EXPR, integer_type_node, ind1, ind2));
return expand_expr (result, target, mode, EXPAND_NORMAL);
}
/* Make a place to write the result of the instruction. */
result = target;
if (! (result != 0
- && GET_CODE (result) == REG && GET_MODE (result) == insn_mode
+ && REG_P (result) && GET_MODE (result) == insn_mode
&& REGNO (result) >= FIRST_PSEUDO_REGISTER))
result = gen_reg_rtx (insn_mode);
/* Stabilize the arguments in case gen_cmpstrsi fails. */
- arg1 = save_expr (arg1);
- arg2 = save_expr (arg2);
+ arg1 = builtin_save_expr (arg1);
+ arg2 = builtin_save_expr (arg2);
arg1_rtx = get_memory_rtx (arg1);
arg2_rtx = get_memory_rtx (arg2);
tree ind1 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
+ fold_convert (cst_uchar_ptr_node, arg1))));
tree ind2 =
fold (build1 (CONVERT_EXPR, integer_type_node,
build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
+ fold_convert (cst_uchar_ptr_node, arg2))));
+ tree result = fold (build2 (MINUS_EXPR, integer_type_node, ind1, ind2));
return expand_expr (result, target, mode, EXPAND_NORMAL);
}
return 0;
/* The actual new length parameter is MIN(len,arg3). */
- len = fold (build (MIN_EXPR, TREE_TYPE (len), len, arg3));
+ len = fold (build2 (MIN_EXPR, TREE_TYPE (len), len,
+ fold_convert (TREE_TYPE (len), arg3)));
/* If we don't have POINTER_TYPE, call the function. */
if (arg1_align == 0 || arg2_align == 0)
/* Make a place to write the result of the instruction. */
result = target;
if (! (result != 0
- && GET_CODE (result) == REG && GET_MODE (result) == insn_mode
+ && REG_P (result) && GET_MODE (result) == insn_mode
&& REGNO (result) >= FIRST_PSEUDO_REGISTER))
result = gen_reg_rtx (insn_mode);
/* Stabilize the arguments in case gen_cmpstrsi fails. */
- arg1 = save_expr (arg1);
- arg2 = save_expr (arg2);
- len = save_expr (len);
+ arg1 = builtin_save_expr (arg1);
+ arg2 = builtin_save_expr (arg2);
+ len = builtin_save_expr (len);
arg1_rtx = get_memory_rtx (arg1);
arg2_rtx = get_memory_rtx (arg2);
pieces into (dst + strlen(dst)). */
tree newdst, arglist,
strlen_fn = implicit_built_in_decls[BUILT_IN_STRLEN];
-
+
/* This is the length argument. */
arglist = build_tree_list (NULL_TREE,
fold (size_binop (PLUS_EXPR,
ssize_int (1))));
/* Prepend src argument. */
arglist = tree_cons (NULL_TREE, src, arglist);
-
+
/* We're going to use dst more than once. */
- dst = save_expr (dst);
+ dst = builtin_save_expr (dst);
/* Create strlen (dst). */
newdst =
build_tree_list (NULL_TREE,
dst)));
/* Create (dst + strlen (dst)). */
- newdst = fold (build (PLUS_EXPR, TREE_TYPE (dst), dst, newdst));
+ newdst = fold (build2 (PLUS_EXPR, TREE_TYPE (dst), dst, newdst));
/* Prepend the new dst argument. */
arglist = tree_cons (NULL_TREE, newdst, arglist);
-
+
/* We don't want to get turned into a memcpy if the
target is const0_rtx, i.e. when the return value
isn't used. That would produce pessimized code so
is inside a start_sequence, make the outer-level insn chain current, so
the code is placed at the start of the function. */
push_topmost_sequence ();
- emit_insn_after (seq, get_insns ());
+ emit_insn_after (seq, entry_of_function ());
pop_topmost_sequence ();
return val;
int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int);
int *word_ptr = (int *) ¤t_function_args_info;
- if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0)
- abort ();
+ gcc_assert (sizeof (CUMULATIVE_ARGS) % sizeof (int) == 0);
if (arglist != 0)
{
if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
{
tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
- tree p2 = build_pointer_type (va_list_type_node);
-
- valist = build1 (ADDR_EXPR, p2, valist);
- valist = fold (build1 (NOP_EXPR, p1, valist));
+ valist = build_fold_addr_expr_with_type (valist, p1);
}
}
else
if (TREE_SIDE_EFFECTS (valist))
valist = save_expr (valist);
- valist = fold (build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (valist)),
- valist));
+ valist = build_fold_indirect_ref (valist);
}
return valist;
{
tree t;
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- make_tree (ptr_type_node, nextarg));
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist,
+ make_tree (ptr_type_node, nextarg));
TREE_SIDE_EFFECTS (t) = 1;
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
/* The "standard" implementation of va_arg: read the value from the
current (padded) address and increment by the (padded) size. */
-rtx
-std_expand_builtin_va_arg (tree valist, tree type)
+tree
+std_gimplify_va_arg_expr (tree valist, tree type, tree *pre_p, tree *post_p)
{
- tree addr_tree, t, type_size = NULL;
- tree align, alignm1;
- tree rounded_size;
- rtx addr;
- HOST_WIDE_INT boundary;
+ tree addr, t, type_size, rounded_size, valist_tmp;
+ unsigned HOST_WIDE_INT align, boundary;
+ bool indirect;
+
+#ifdef ARGS_GROW_DOWNWARD
+ /* All of the alignment and movement below is for args-grow-up machines.
+ As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
+ implement their own specialized gimplify_va_arg_expr routines. */
+ gcc_unreachable ();
+#endif
- /* Compute the rounded size of the type. */
- align = size_int (PARM_BOUNDARY / BITS_PER_UNIT);
- alignm1 = size_int (PARM_BOUNDARY / BITS_PER_UNIT - 1);
- boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type);
+ indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false);
+ if (indirect)
+ type = build_pointer_type (type);
+
+ align = PARM_BOUNDARY / BITS_PER_UNIT;
+ boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type) / BITS_PER_UNIT;
+
+ /* Hoist the valist value into a temporary for the moment. */
+ valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL);
/* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
requires greater alignment, we must perform dynamic alignment. */
-
- if (boundary > PARM_BOUNDARY)
+ if (boundary > align)
{
- if (!PAD_VARARGS_DOWN)
- {
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- build (PLUS_EXPR, TREE_TYPE (valist), valist,
- build_int_2 (boundary / BITS_PER_UNIT - 1, 0)));
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
- }
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- build (BIT_AND_EXPR, TREE_TYPE (valist), valist,
- build_int_2 (~(boundary / BITS_PER_UNIT - 1), -1)));
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ t = fold_convert (TREE_TYPE (valist), size_int (boundary - 1));
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
+ build2 (PLUS_EXPR, TREE_TYPE (valist), valist_tmp, t));
+ gimplify_and_add (t, pre_p);
+
+ t = fold_convert (TREE_TYPE (valist), size_int (-boundary));
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
+ build2 (BIT_AND_EXPR, TREE_TYPE (valist), valist_tmp, t));
+ gimplify_and_add (t, pre_p);
}
- if (type == error_mark_node
- || (type_size = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type))) == NULL
- || TREE_OVERFLOW (type_size))
- rounded_size = size_zero_node;
- else
- rounded_size = fold (build (MULT_EXPR, sizetype,
- fold (build (TRUNC_DIV_EXPR, sizetype,
- fold (build (PLUS_EXPR, sizetype,
- type_size, alignm1)),
- align)),
- align));
+
+ /* Compute the rounded size of the type. */
+ type_size = size_in_bytes (type);
+ rounded_size = round_up (type_size, align);
+
+ /* Reduce rounded_size so it's sharable with the postqueue. */
+ gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue);
/* Get AP. */
- addr_tree = valist;
- if (PAD_VARARGS_DOWN && ! integer_zerop (rounded_size))
+ addr = valist_tmp;
+ if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size))
{
/* Small args are padded downward. */
- addr_tree = fold (build (PLUS_EXPR, TREE_TYPE (addr_tree), addr_tree,
- fold (build (COND_EXPR, sizetype,
- fold (build (GT_EXPR, sizetype,
- rounded_size,
- align)),
- size_zero_node,
- fold (build (MINUS_EXPR, sizetype,
- rounded_size,
- type_size))))));
+ t = fold (build2 (GT_EXPR, sizetype, rounded_size, size_int (align)));
+ t = fold (build3 (COND_EXPR, sizetype, t, size_zero_node,
+ size_binop (MINUS_EXPR, rounded_size, type_size)));
+ t = fold_convert (TREE_TYPE (addr), t);
+ addr = fold (build2 (PLUS_EXPR, TREE_TYPE (addr), addr, t));
}
- addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL);
- addr = copy_to_reg (addr);
-
/* Compute new value for AP. */
- if (! integer_zerop (rounded_size))
+ t = fold_convert (TREE_TYPE (valist), rounded_size);
+ t = build2 (PLUS_EXPR, TREE_TYPE (valist), valist_tmp, t);
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t);
+ gimplify_and_add (t, pre_p);
+
+ addr = fold_convert (build_pointer_type (type), addr);
+
+ if (indirect)
{
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- build (PLUS_EXPR, TREE_TYPE (valist), valist,
- rounded_size));
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ addr = build_fold_indirect_ref (addr);
+ if (flag_mudflap) /* Don't instrument va_arg INDIRECT_REF. */
+ mf_mark (addr);
}
+ addr = build_fold_indirect_ref (addr);
+ if (flag_mudflap) /* Don't instrument va_arg INDIRECT_REF. */
+ mf_mark (addr);
+
return addr;
}
-/* Expand __builtin_va_arg, which is not really a builtin function, but
- a very special sort of operator. */
+/* Return a dummy expression of type TYPE in order to keep going after an
+ error. */
-rtx
-expand_builtin_va_arg (tree valist, tree type)
+static tree
+dummy_object (tree type)
+{
+ tree t = convert (build_pointer_type (type), null_pointer_node);
+ return build1 (INDIRECT_REF, type, t);
+}
+
+/* Gimplify __builtin_va_arg, aka VA_ARG_EXPR, which is not really a
+ builtin function, but a very special sort of operator. */
+
+enum gimplify_status
+gimplify_va_arg_expr (tree *expr_p, tree *pre_p, tree *post_p)
{
- rtx addr, result;
tree promoted_type, want_va_type, have_va_type;
+ tree valist = TREE_OPERAND (*expr_p, 0);
+ tree type = TREE_TYPE (*expr_p);
+ tree t;
/* Verify that valist is of the proper type. */
-
want_va_type = va_list_type_node;
have_va_type = TREE_TYPE (valist);
+
+ if (have_va_type == error_mark_node)
+ return GS_ERROR;
+
if (TREE_CODE (want_va_type) == ARRAY_TYPE)
{
/* If va_list is an array type, the argument may have decayed
have_va_type = TREE_TYPE (have_va_type);
}
}
+
if (TYPE_MAIN_VARIANT (want_va_type) != TYPE_MAIN_VARIANT (have_va_type))
{
error ("first argument to `va_arg' not of type `va_list'");
- addr = const0_rtx;
+ return GS_ERROR;
}
/* Generate a diagnostic for requesting data of a type that cannot
be passed through `...' due to type promotion at the call site. */
- else if ((promoted_type = (*lang_hooks.types.type_promotes_to) (type))
+ else if ((promoted_type = lang_hooks.types.type_promotes_to (type))
!= type)
{
- const char *name = "<anonymous type>", *pname = 0;
static bool gave_help;
- if (TYPE_NAME (type))
- {
- if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
- name = IDENTIFIER_POINTER (TYPE_NAME (type));
- else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
- && DECL_NAME (TYPE_NAME (type)))
- name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
- }
- if (TYPE_NAME (promoted_type))
- {
- if (TREE_CODE (TYPE_NAME (promoted_type)) == IDENTIFIER_NODE)
- pname = IDENTIFIER_POINTER (TYPE_NAME (promoted_type));
- else if (TREE_CODE (TYPE_NAME (promoted_type)) == TYPE_DECL
- && DECL_NAME (TYPE_NAME (promoted_type)))
- pname = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (promoted_type)));
- }
-
/* Unfortunately, this is merely undefined, rather than a constraint
violation, so we cannot make this an error. If this call is never
executed, the program is still strictly conforming. */
- warning ("`%s' is promoted to `%s' when passed through `...'",
- name, pname);
+ warning ("`%T' is promoted to `%T' when passed through `...'",
+ type, promoted_type);
if (! gave_help)
{
gave_help = true;
- warning ("(so you should pass `%s' not `%s' to `va_arg')",
- pname, name);
+ warning ("(so you should pass `%T' not `%T' to `va_arg')",
+ promoted_type, type);
}
/* We can, however, treat "undefined" any way we please.
Call abort to encourage the user to fix the program. */
inform ("if this code is reached, the program will abort");
- expand_builtin_trap ();
+ t = build_function_call_expr (implicit_built_in_decls[BUILT_IN_TRAP],
+ NULL);
+ append_to_statement_list (t, pre_p);
/* This is dead code, but go ahead and finish so that the
mode of the result comes out right. */
- addr = const0_rtx;
+ *expr_p = dummy_object (type);
+ return GS_ALL_DONE;
}
else
{
/* Make it easier for the backends by protecting the valist argument
from multiple evaluations. */
- valist = stabilize_va_list (valist, 0);
-
-#ifdef EXPAND_BUILTIN_VA_ARG
- addr = EXPAND_BUILTIN_VA_ARG (valist, type);
-#else
- addr = std_expand_builtin_va_arg (valist, type);
-#endif
- }
-
- addr = convert_memory_address (Pmode, addr);
+ if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
+ {
+ /* For this case, the backends will be expecting a pointer to
+ TREE_TYPE (va_list_type_node), but it's possible we've
+ actually been given an array (an actual va_list_type_node).
+ So fix it. */
+ if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
+ {
+ tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
+ valist = build_fold_addr_expr_with_type (valist, p1);
+ }
+ gimplify_expr (&valist, pre_p, post_p, is_gimple_val, fb_rvalue);
+ }
+ else
+ gimplify_expr (&valist, pre_p, post_p, is_gimple_min_lval, fb_lvalue);
- result = gen_rtx_MEM (TYPE_MODE (type), addr);
- set_mem_alias_set (result, get_varargs_alias_set ());
+ if (!targetm.gimplify_va_arg_expr)
+ /* Once most targets are converted this should abort. */
+ return GS_ALL_DONE;
- return result;
+ *expr_p = targetm.gimplify_va_arg_expr (valist, type, pre_p, post_p);
+ return GS_OK;
+ }
}
/* Expand ARGLIST, from a call to __builtin_va_end. */
if (TREE_CODE (va_list_type_node) != ARRAY_TYPE)
{
- t = build (MODIFY_EXPR, va_list_type_node, dst, src);
+ t = build2 (MODIFY_EXPR, va_list_type_node, dst, src);
TREE_SIDE_EFFECTS (t) = 1;
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
}
if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
return tem;
- if (GET_CODE (tem) != REG
+ if (!REG_P (tem)
&& ! CONSTANT_P (tem))
tem = copy_to_mode_reg (Pmode, tem);
return tem;
rtx op0;
rtx result;
+ /* In -fmudflap-instrumented code, alloca() and __builtin_alloca()
+ should always expand to function calls. These can be intercepted
+ in libmudflap. */
+ if (flag_mudflap)
+ return 0;
+
if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
return 0;
Set TARGET to wherever the result comes back. */
target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))),
op_optab, op0, target, 1);
- if (target == 0)
- abort ();
+ gcc_assert (target);
return convert_to_mode (target_mode, target, 0);
}
{
/* New argument list transforming fputs(string, stream) to
fputc(string[0], stream). */
- arglist =
- build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
- arglist =
- tree_cons (NULL_TREE, build_int_2 (p[0], 0), arglist);
+ arglist = build_tree_list (NULL_TREE,
+ TREE_VALUE (TREE_CHAIN (arglist)));
+ arglist = tree_cons (NULL_TREE,
+ build_int_cst (NULL_TREE, p[0]),
+ arglist);
fn = fn_fputc;
break;
}
break;
}
default:
- abort ();
+ gcc_unreachable ();
}
return expand_expr (build_function_call_expr (fn, arglist),
ret = get_insns ();
drop_through_label = get_last_insn ();
- if (drop_through_label && GET_CODE (drop_through_label) == NOTE)
+ if (drop_through_label && NOTE_P (drop_through_label))
drop_through_label = prev_nonnote_insn (drop_through_label);
- if (drop_through_label && GET_CODE (drop_through_label) != CODE_LABEL)
+ if (drop_through_label && !LABEL_P (drop_through_label))
drop_through_label = NULL_RTX;
end_sequence ();
{
rtx next = NEXT_INSN (insn);
- if (GET_CODE (insn) == JUMP_INSN && any_condjump_p (insn))
+ if (JUMP_P (insn) && any_condjump_p (insn))
{
rtx ifelse = SET_SRC (pc_set (insn));
rtx then_dest = XEXP (ifelse, 1);
/* Otherwise check where we drop through. */
else if (else_dest == pc_rtx)
{
- if (next && GET_CODE (next) == NOTE)
+ if (next && NOTE_P (next))
next = next_nonnote_insn (next);
- if (next && GET_CODE (next) == JUMP_INSN
+ if (next && JUMP_P (next)
&& any_uncondjump_p (next))
temp = XEXP (SET_SRC (pc_set (next)), 0);
else
}
else if (then_dest == pc_rtx)
{
- if (next && GET_CODE (next) == NOTE)
+ if (next && NOTE_P (next))
next = next_nonnote_insn (next);
- if (next && GET_CODE (next) == JUMP_INSN
+ if (next && JUMP_P (next)
&& any_uncondjump_p (next))
temp = XEXP (SET_SRC (pc_set (next)), 0);
else
return expand_abs (mode, op0, target, 0, safe_from_p (target, arg, 1));
}
-/* Expand a call to cabs, cabsf or cabsl with arguments ARGLIST.
- Return 0 if a normal call should be emitted rather than expanding
- the function inline. If convenient, the result should be placed
- in target. */
-
-static rtx
-expand_builtin_cabs (tree arglist, rtx target)
-{
- enum machine_mode mode;
- tree arg;
- rtx op0;
-
- if (arglist == 0 || TREE_CHAIN (arglist))
- return 0;
- arg = TREE_VALUE (arglist);
- if (TREE_CODE (TREE_TYPE (arg)) != COMPLEX_TYPE
- || TREE_CODE (TREE_TYPE (TREE_TYPE (arg))) != REAL_TYPE)
- return 0;
-
- mode = TYPE_MODE (TREE_TYPE (arg));
- op0 = expand_expr (arg, NULL_RTX, VOIDmode, 0);
- return expand_complex_abs (mode, op0, target, 0);
-}
-
/* Create a new constant string literal and return a char* pointer to it.
The STRING_CST value is the LEN characters at STR. */
static tree
t = build_string (len, str);
elem = build_type_variant (char_type_node, 1, 0);
- index = build_index_type (build_int_2 (len - 1, 0));
+ index = build_index_type (build_int_cst (NULL_TREE, len - 1));
type = build_array_type (elem, index);
TREE_TYPE (t) = type;
TREE_CONSTANT (t) = 1;
+ TREE_INVARIANT (t) = 1;
TREE_READONLY (t) = 1;
TREE_STATIC (t) = 1;
/* Expand a call to printf or printf_unlocked with argument list ARGLIST.
Return 0 if a normal call should be emitted rather than transforming
the function inline. If convenient, the result should be placed in
- TARGET with mode MODE. UNLOCKED indicates this is a printf_unlocked
+ TARGET with mode MODE. UNLOCKED indicates this is a printf_unlocked
call. */
static rtx
expand_builtin_printf (tree arglist, rtx target, enum machine_mode mode,
/* Given printf("c"), (where c is any one character,)
convert "c"[0] to an int and pass that to the replacement
function. */
- arg = build_int_2 (fmt_str[0], 0);
+ arg = build_int_cst (NULL_TREE, fmt_str[0]);
arglist = build_tree_list (NULL_TREE, arg);
fn = fn_putchar;
}
{
/* Create a NUL-terminated string that's one char shorter
than the original, stripping off the trailing '\n'. */
- char *newstr = (char *) alloca (len);
+ char *newstr = alloca (len);
memcpy (newstr, fmt_str, len - 1);
newstr[len - 1] = 0;
/* Expand a call to fprintf or fprintf_unlocked with argument list ARGLIST.
Return 0 if a normal call should be emitted rather than transforming
the function inline. If convenient, the result should be placed in
- TARGET with mode MODE. UNLOCKED indicates this is a fprintf_unlocked
+ TARGET with mode MODE. UNLOCKED indicates this is a fprintf_unlocked
call. */
static rtx
expand_builtin_fprintf (tree arglist, rtx target, enum machine_mode mode,
const0_rtx, VOIDmode, EXPAND_NORMAL);
if (target == const0_rtx)
return const0_rtx;
- exp = build_int_2 (strlen (fmt_str), 0);
- exp = fold (build1 (NOP_EXPR, integer_type_node, exp));
+ exp = build_int_cst (NULL_TREE, strlen (fmt_str));
return expand_expr (exp, target, mode, EXPAND_NORMAL);
}
/* If the format is "%s", use strcpy if the result isn't used. */
return 0;
}
+/* Expand a call to either the entry or exit function profiler. */
+
+static rtx
+expand_builtin_profile_func (bool exitp)
+{
+ rtx this, which;
+
+ this = DECL_RTL (current_function_decl);
+ gcc_assert (MEM_P (this));
+ this = XEXP (this, 0);
+
+ if (exitp)
+ which = profile_function_exit_libfunc;
+ else
+ which = profile_function_entry_libfunc;
+
+ emit_library_call (which, LCT_NORMAL, VOIDmode, 2, this, Pmode,
+ expand_builtin_return_addr (BUILT_IN_RETURN_ADDRESS,
+ 0, hard_frame_pointer_rtx),
+ Pmode);
+
+ return const0_rtx;
+}
+
+/* Given a trampoline address, make sure it satisfies TRAMPOLINE_ALIGNMENT. */
+
+static rtx
+round_trampoline_addr (rtx tramp)
+{
+ rtx temp, addend, mask;
+
+ /* If we don't need too much alignment, we'll have been guaranteed
+ proper alignment by get_trampoline_type. */
+ if (TRAMPOLINE_ALIGNMENT <= STACK_BOUNDARY)
+ return tramp;
+
+ /* Round address up to desired boundary. */
+ temp = gen_reg_rtx (Pmode);
+ addend = GEN_INT (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT - 1);
+ mask = GEN_INT (-TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT);
+
+ temp = expand_simple_binop (Pmode, PLUS, tramp, addend,
+ temp, 0, OPTAB_LIB_WIDEN);
+ tramp = expand_simple_binop (Pmode, AND, temp, mask,
+ temp, 0, OPTAB_LIB_WIDEN);
+
+ return tramp;
+}
+
+static rtx
+expand_builtin_init_trampoline (tree arglist)
+{
+ tree t_tramp, t_func, t_chain;
+ rtx r_tramp, r_func, r_chain;
+#ifdef TRAMPOLINE_TEMPLATE
+ rtx blktramp;
+#endif
+
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE,
+ POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ t_tramp = TREE_VALUE (arglist);
+ arglist = TREE_CHAIN (arglist);
+ t_func = TREE_VALUE (arglist);
+ arglist = TREE_CHAIN (arglist);
+ t_chain = TREE_VALUE (arglist);
+
+ r_tramp = expand_expr (t_tramp, NULL_RTX, VOIDmode, 0);
+ r_func = expand_expr (t_func, NULL_RTX, VOIDmode, 0);
+ r_chain = expand_expr (t_chain, NULL_RTX, VOIDmode, 0);
+
+ /* Generate insns to initialize the trampoline. */
+ r_tramp = round_trampoline_addr (r_tramp);
+#ifdef TRAMPOLINE_TEMPLATE
+ blktramp = gen_rtx_MEM (BLKmode, r_tramp);
+ set_mem_align (blktramp, TRAMPOLINE_ALIGNMENT);
+ emit_block_move (blktramp, assemble_trampoline_template (),
+ GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL);
+#endif
+ trampolines_created = 1;
+ INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);
+
+ return const0_rtx;
+}
+
+static rtx
+expand_builtin_adjust_trampoline (tree arglist)
+{
+ rtx tramp;
+
+ if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ tramp = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
+ tramp = round_trampoline_addr (tramp);
+#ifdef TRAMPOLINE_ADJUST_ADDRESS
+ TRAMPOLINE_ADJUST_ADDRESS (tramp);
+#endif
+
+ return tramp;
+}
+
/* Expand a call to the built-in signbit, signbitf or signbitl function.
Return NULL_RTX if a normal call should be emitted rather than expanding
the function in-line. EXP is the expression that is a call to the builtin
if (fmt->has_signed_zero && HONOR_SIGNED_ZEROS (fmode))
return 0;
- arg = fold (build (LT_EXPR, TREE_TYPE (exp), arg,
- build_real (TREE_TYPE (arg), dconst0)));
+ arg = fold (build2 (LT_EXPR, TREE_TYPE (exp), arg,
+ build_real (TREE_TYPE (arg), dconst0)));
return expand_expr (arg, target, VOIDmode, EXPAND_NORMAL);
}
if (GET_MODE_BITSIZE (imode) > GET_MODE_BITSIZE (rmode))
{
- if (BITS_BIG_ENDIAN)
+ if (BYTES_BIG_ENDIAN)
bitpos = GET_MODE_BITSIZE (imode) - 1 - bitpos;
temp = copy_to_mode_reg (imode, temp);
temp = extract_bit_field (temp, 1, bitpos, 1,
- NULL_RTX, rmode, rmode,
- GET_MODE_SIZE (imode));
+ NULL_RTX, rmode, rmode);
}
else
{
}
return temp;
}
+
+/* Expand fork or exec calls. TARGET is the desired target of the
+ call. ARGLIST is the list of arguments of the call. FN is the
+ identificator of the actual function. IGNORE is nonzero if the
+ value is to be ignored. */
+
+static rtx
+expand_builtin_fork_or_exec (tree fn, tree arglist, rtx target, int ignore)
+{
+ tree id, decl;
+ tree call;
+
+ /* If we are not profiling, just call the function. */
+ if (!profile_arc_flag)
+ return NULL_RTX;
+
+ /* Otherwise call the wrapper. This should be equivalent for the rest of
+ compiler, so the code does not diverge, and the wrapper may run the
+ code necessary for keeping the profiling sane. */
+
+ switch (DECL_FUNCTION_CODE (fn))
+ {
+ case BUILT_IN_FORK:
+ id = get_identifier ("__gcov_fork");
+ break;
+
+ case BUILT_IN_EXECL:
+ id = get_identifier ("__gcov_execl");
+ break;
+
+ case BUILT_IN_EXECV:
+ id = get_identifier ("__gcov_execv");
+ break;
+
+ case BUILT_IN_EXECLP:
+ id = get_identifier ("__gcov_execlp");
+ break;
+
+ case BUILT_IN_EXECLE:
+ id = get_identifier ("__gcov_execle");
+ break;
+
+ case BUILT_IN_EXECVP:
+ id = get_identifier ("__gcov_execvp");
+ break;
+
+ case BUILT_IN_EXECVE:
+ id = get_identifier ("__gcov_execve");
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ decl = build_decl (FUNCTION_DECL, id, TREE_TYPE (fn));
+ DECL_EXTERNAL (decl) = 1;
+ TREE_PUBLIC (decl) = 1;
+ DECL_ARTIFICIAL (decl) = 1;
+ TREE_NOTHROW (decl) = 1;
+ call = build_function_call_expr (decl, arglist);
+
+ return expand_call (call, target, ignore);
+}
\f
/* Expand an expression EXP that calls a built-in function,
with result going to TARGET if that's convenient
enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
enum machine_mode target_mode = TYPE_MODE (TREE_TYPE (exp));
- /* Perform postincrements before expanding builtin functions. */
- emit_queue ();
-
if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
- return (*targetm.expand_builtin) (exp, target, subtarget, mode, ignore);
+ return targetm.expand_builtin (exp, target, subtarget, mode, ignore);
/* When not optimizing, generate calls to library functions for a certain
set of builtins. */
switch (fcode)
{
- case BUILT_IN_ABS:
- case BUILT_IN_LABS:
- case BUILT_IN_LLABS:
- case BUILT_IN_IMAXABS:
- /* build_function_call changes these into ABS_EXPR. */
- abort ();
-
case BUILT_IN_FABS:
case BUILT_IN_FABSF:
case BUILT_IN_FABSL:
return target;
break;
+ /* Just do a normal library call if we were unable to fold
+ the values. */
case BUILT_IN_CABS:
case BUILT_IN_CABSF:
case BUILT_IN_CABSL:
- if (flag_unsafe_math_optimizations)
- {
- target = expand_builtin_cabs (arglist, target);
- if (target)
- return target;
- }
break;
- case BUILT_IN_CONJ:
- case BUILT_IN_CONJF:
- case BUILT_IN_CONJL:
- case BUILT_IN_CREAL:
- case BUILT_IN_CREALF:
- case BUILT_IN_CREALL:
- case BUILT_IN_CIMAG:
- case BUILT_IN_CIMAGF:
- case BUILT_IN_CIMAGL:
- /* expand_tree_builtin changes these into CONJ_EXPR, REALPART_EXPR
- and IMAGPART_EXPR. */
- abort ();
-
- case BUILT_IN_SIN:
- case BUILT_IN_SINF:
- case BUILT_IN_SINL:
- case BUILT_IN_COS:
- case BUILT_IN_COSF:
- case BUILT_IN_COSL:
case BUILT_IN_EXP:
case BUILT_IN_EXPF:
case BUILT_IN_EXPL:
+ case BUILT_IN_EXP10:
+ case BUILT_IN_EXP10F:
+ case BUILT_IN_EXP10L:
+ case BUILT_IN_POW10:
+ case BUILT_IN_POW10F:
+ case BUILT_IN_POW10L:
+ case BUILT_IN_EXP2:
+ case BUILT_IN_EXP2F:
+ case BUILT_IN_EXP2L:
+ case BUILT_IN_EXPM1:
+ case BUILT_IN_EXPM1F:
+ case BUILT_IN_EXPM1L:
+ case BUILT_IN_LOGB:
+ case BUILT_IN_LOGBF:
+ case BUILT_IN_LOGBL:
+ case BUILT_IN_ILOGB:
+ case BUILT_IN_ILOGBF:
+ case BUILT_IN_ILOGBL:
case BUILT_IN_LOG:
case BUILT_IN_LOGF:
case BUILT_IN_LOGL:
case BUILT_IN_LOG2:
case BUILT_IN_LOG2F:
case BUILT_IN_LOG2L:
+ case BUILT_IN_LOG1P:
+ case BUILT_IN_LOG1PF:
+ case BUILT_IN_LOG1PL:
case BUILT_IN_TAN:
case BUILT_IN_TANF:
case BUILT_IN_TANL:
+ case BUILT_IN_ASIN:
+ case BUILT_IN_ASINF:
+ case BUILT_IN_ASINL:
+ case BUILT_IN_ACOS:
+ case BUILT_IN_ACOSF:
+ case BUILT_IN_ACOSL:
case BUILT_IN_ATAN:
case BUILT_IN_ATANF:
case BUILT_IN_ATANL:
case BUILT_IN_NEARBYINT:
case BUILT_IN_NEARBYINTF:
case BUILT_IN_NEARBYINTL:
+ case BUILT_IN_RINT:
+ case BUILT_IN_RINTF:
+ case BUILT_IN_RINTL:
target = expand_builtin_mathfn (exp, target, subtarget);
if (target)
return target;
case BUILT_IN_ATAN2:
case BUILT_IN_ATAN2F:
case BUILT_IN_ATAN2L:
+ case BUILT_IN_FMOD:
+ case BUILT_IN_FMODF:
+ case BUILT_IN_FMODL:
+ case BUILT_IN_DREM:
+ case BUILT_IN_DREMF:
+ case BUILT_IN_DREML:
if (! flag_unsafe_math_optimizations)
break;
target = expand_builtin_mathfn_2 (exp, target, subtarget);
return target;
break;
+ case BUILT_IN_SIN:
+ case BUILT_IN_SINF:
+ case BUILT_IN_SINL:
+ case BUILT_IN_COS:
+ case BUILT_IN_COSF:
+ case BUILT_IN_COSL:
+ if (! flag_unsafe_math_optimizations)
+ break;
+ target = expand_builtin_mathfn_3 (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
case BUILT_IN_APPLY_ARGS:
return expand_builtin_apply_args ();
/* Return the address of the first anonymous stack arg. */
case BUILT_IN_NEXT_ARG:
+ simplify_builtin_next_arg (arglist);
return expand_builtin_next_arg (arglist);
case BUILT_IN_CLASSIFY_TYPE:
return expand_builtin_classify_type (arglist);
case BUILT_IN_CONSTANT_P:
- return expand_builtin_constant_p (arglist, target_mode);
+ return const0_rtx;
case BUILT_IN_FRAME_ADDRESS:
case BUILT_IN_RETURN_ADDRESS:
case BUILT_IN_AGGREGATE_INCOMING_ADDRESS:
if (arglist != 0
|| ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))
- || GET_CODE (DECL_RTL (DECL_RESULT (current_function_decl))) != MEM)
+ || !MEM_P (DECL_RTL (DECL_RESULT (current_function_decl))))
return const0_rtx;
else
return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0);
return target;
break;
+ case BUILT_IN_STACK_SAVE:
+ return expand_stack_save ();
+
+ case BUILT_IN_STACK_RESTORE:
+ expand_stack_restore (TREE_VALUE (arglist));
+ return const0_rtx;
+
case BUILT_IN_FFS:
case BUILT_IN_FFSL:
case BUILT_IN_FFSLL:
+ case BUILT_IN_FFSIMAX:
target = expand_builtin_unop (target_mode, arglist, target,
subtarget, ffs_optab);
if (target)
case BUILT_IN_CLZ:
case BUILT_IN_CLZL:
case BUILT_IN_CLZLL:
+ case BUILT_IN_CLZIMAX:
target = expand_builtin_unop (target_mode, arglist, target,
subtarget, clz_optab);
if (target)
case BUILT_IN_CTZ:
case BUILT_IN_CTZL:
case BUILT_IN_CTZLL:
+ case BUILT_IN_CTZIMAX:
target = expand_builtin_unop (target_mode, arglist, target,
subtarget, ctz_optab);
if (target)
case BUILT_IN_POPCOUNT:
case BUILT_IN_POPCOUNTL:
case BUILT_IN_POPCOUNTLL:
+ case BUILT_IN_POPCOUNTIMAX:
target = expand_builtin_unop (target_mode, arglist, target,
subtarget, popcount_optab);
if (target)
case BUILT_IN_PARITY:
case BUILT_IN_PARITYL:
case BUILT_IN_PARITYLL:
+ case BUILT_IN_PARITYIMAX:
target = expand_builtin_unop (target_mode, arglist, target,
subtarget, parity_optab);
if (target)
return const0_rtx;
}
+ case BUILT_IN_NONLOCAL_GOTO:
+ target = expand_builtin_nonlocal_goto (arglist);
+ if (target)
+ return target;
+ break;
+
+ /* This updates the setjmp buffer that is its argument with the value
+ of the current stack pointer. */
+ case BUILT_IN_UPDATE_SETJMP_BUF:
+ if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
+ {
+ rtx buf_addr
+ = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
+
+ expand_builtin_update_setjmp_buf (buf_addr);
+ return const0_rtx;
+ }
+ break;
+
case BUILT_IN_TRAP:
expand_builtin_trap ();
return const0_rtx;
if (target)
return target;
break;
-
case BUILT_IN_FPUTS_UNLOCKED:
target = expand_builtin_fputs (arglist, target, true);
if (target)
expand_builtin_prefetch (arglist);
return const0_rtx;
+ case BUILT_IN_PROFILE_FUNC_ENTER:
+ return expand_builtin_profile_func (false);
+ case BUILT_IN_PROFILE_FUNC_EXIT:
+ return expand_builtin_profile_func (true);
+
+ case BUILT_IN_INIT_TRAMPOLINE:
+ return expand_builtin_init_trampoline (arglist);
+ case BUILT_IN_ADJUST_TRAMPOLINE:
+ return expand_builtin_adjust_trampoline (arglist);
+
+ case BUILT_IN_FORK:
+ case BUILT_IN_EXECL:
+ case BUILT_IN_EXECV:
+ case BUILT_IN_EXECLP:
+ case BUILT_IN_EXECLE:
+ case BUILT_IN_EXECVP:
+ case BUILT_IN_EXECVE:
+ target = expand_builtin_fork_or_exec (fndecl, arglist, target, ignore);
+ if (target)
+ return target;
+ break;
default: /* just do library call, if unknown builtin */
- if (!DECL_ASSEMBLER_NAME_SET_P (fndecl))
- error ("built-in function `%s' not currently supported",
- IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ break;
}
/* The switch statement above can drop through to cause the function
return 0;
}
+/* Fold a call to __builtin_expect, if we expect that a comparison against
+ the argument will fold to a constant. In practice, this means a true
+ constant or the address of a non-weak symbol. ARGLIST is the argument
+ list of the call. */
+
+static tree
+fold_builtin_expect (tree arglist)
+{
+ tree arg, inner;
+
+ if (arglist == 0)
+ return 0;
+
+ arg = TREE_VALUE (arglist);
+
+ /* If the argument isn't invariant, then there's nothing we can do. */
+ if (!TREE_INVARIANT (arg))
+ return 0;
+
+ /* If we're looking at an address of a weak decl, then do not fold. */
+ inner = arg;
+ STRIP_NOPS (inner);
+ if (TREE_CODE (inner) == ADDR_EXPR)
+ {
+ do
+ {
+ inner = TREE_OPERAND (inner, 0);
+ }
+ while (TREE_CODE (inner) == COMPONENT_REF
+ || TREE_CODE (inner) == ARRAY_REF);
+ if (DECL_P (inner) && DECL_WEAK (inner))
+ return 0;
+ }
+
+ /* Otherwise, ARG already has the proper type for the return value. */
+ return arg;
+}
+
/* Fold a call to __builtin_classify_type. */
static tree
fold_builtin_classify_type (tree arglist)
{
if (arglist == 0)
- return build_int_2 (no_type_class, 0);
+ return build_int_cst (NULL_TREE, no_type_class);
- return build_int_2 (type_to_class (TREE_TYPE (TREE_VALUE (arglist))), 0);
+ return build_int_cst (NULL_TREE,
+ type_to_class (TREE_TYPE (TREE_VALUE (arglist))));
}
/* Fold a call to __builtin_inf or __builtin_huge_val. */
case BUILT_IN_NEARBYINT:
case BUILT_IN_NEARBYINTF:
case BUILT_IN_NEARBYINTL:
+ case BUILT_IN_RINT:
+ case BUILT_IN_RINTF:
+ case BUILT_IN_RINTL:
case BUILT_IN_ROUND:
case BUILT_IN_ROUNDF:
case BUILT_IN_ROUNDL:
&& (decl = mathfn_built_in (newtype, fcode)))
{
arglist =
- build_tree_list (NULL_TREE, fold (convert (newtype, arg0)));
- return convert (ftype,
- build_function_call_expr (decl, arglist));
+ build_tree_list (NULL_TREE, fold_convert (newtype, arg0));
+ return fold_convert (ftype,
+ build_function_call_expr (decl, arglist));
}
}
return 0;
}
-/* Fold function call to builtin cabs, cabsf or cabsl. FNDECL is the
- function's DECL, ARGLIST is the argument list and TYPE is the return
- type. Return NULL_TREE if no simplification can be made. */
+/* EXP is assumed to be builtin call which can narrow the FP type of
+ the argument, for instance lround((double)f) -> lroundf (f). */
static tree
-fold_builtin_cabs (tree fndecl, tree arglist, tree type)
+fold_fixed_mathfn (tree exp)
+{
+ tree fndecl = get_callee_fndecl (exp);
+ tree arglist = TREE_OPERAND (exp, 1);
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree arg;
+
+ if (! validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ return 0;
+
+ arg = TREE_VALUE (arglist);
+
+ /* If argument is already integer valued, and we don't need to worry
+ about setting errno, there's no need to perform rounding. */
+ if (! flag_errno_math && integer_valued_real_p (arg))
+ return fold (build1 (FIX_TRUNC_EXPR, TREE_TYPE (exp), arg));
+
+ if (optimize)
+ {
+ tree ftype = TREE_TYPE (arg);
+ tree arg0 = strip_float_extensions (arg);
+ tree newtype = TREE_TYPE (arg0);
+ tree decl;
+
+ if (TYPE_PRECISION (newtype) < TYPE_PRECISION (ftype)
+ && (decl = mathfn_built_in (newtype, fcode)))
+ {
+ arglist =
+ build_tree_list (NULL_TREE, fold_convert (newtype, arg0));
+ return build_function_call_expr (decl, arglist);
+ }
+ }
+ return 0;
+}
+
+/* Fold function call to builtin cabs, cabsf or cabsl. ARGLIST
+ is the argument list and TYPE is the return type. Return
+ NULL_TREE if no if no simplification can be made. */
+
+static tree
+fold_builtin_cabs (tree arglist, tree type)
{
tree arg;
&& real_zerop (TREE_OPERAND (arg, 1)))
return fold (build1 (ABS_EXPR, type, TREE_OPERAND (arg, 0)));
- if (flag_unsafe_math_optimizations)
+ /* Don't do this when optimizing for size. */
+ if (flag_unsafe_math_optimizations
+ && optimize && !optimize_size)
{
- enum built_in_function fcode;
- tree sqrtfn;
-
- fcode = DECL_FUNCTION_CODE (fndecl);
- if (fcode == BUILT_IN_CABS)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRT];
- else if (fcode == BUILT_IN_CABSF)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRTF];
- else if (fcode == BUILT_IN_CABSL)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRTL];
- else
- sqrtfn = NULL_TREE;
+ tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
if (sqrtfn != NULL_TREE)
{
tree rpart, ipart, result, arglist;
- arg = save_expr (arg);
+ arg = builtin_save_expr (arg);
rpart = fold (build1 (REALPART_EXPR, type, arg));
ipart = fold (build1 (IMAGPART_EXPR, type, arg));
- rpart = save_expr (rpart);
- ipart = save_expr (ipart);
+ rpart = builtin_save_expr (rpart);
+ ipart = builtin_save_expr (ipart);
- result = fold (build (PLUS_EXPR, type,
- fold (build (MULT_EXPR, type,
- rpart, rpart)),
- fold (build (MULT_EXPR, type,
- ipart, ipart))));
+ result = fold (build2 (PLUS_EXPR, type,
+ fold (build2 (MULT_EXPR, type,
+ rpart, rpart)),
+ fold (build2 (MULT_EXPR, type,
+ ipart, ipart))));
arglist = build_tree_list (NULL_TREE, result);
return build_function_call_expr (sqrtfn, arglist);
if (! validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
return 0;
- /* Optimize ceil of constant value. */
+ /* Optimize round of constant value. */
arg = TREE_VALUE (arglist);
if (TREE_CODE (arg) == REAL_CST && ! TREE_CONSTANT_OVERFLOW (arg))
{
return fold_trunc_transparent_mathfn (exp);
}
+/* Fold function call to builtin lround, lroundf or lroundl (or the
+ corresponding long long versions). Return NULL_TREE if no
+ simplification can be made. */
+
+static tree
+fold_builtin_lround (tree exp)
+{
+ tree arglist = TREE_OPERAND (exp, 1);
+ tree arg;
+
+ if (! validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ return 0;
+
+ /* Optimize lround of constant value. */
+ arg = TREE_VALUE (arglist);
+ if (TREE_CODE (arg) == REAL_CST && ! TREE_CONSTANT_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE x = TREE_REAL_CST (arg);
+
+ if (! REAL_VALUE_ISNAN (x) && ! REAL_VALUE_ISINF (x))
+ {
+ tree itype = TREE_TYPE (exp), ftype = TREE_TYPE (arg), result;
+ HOST_WIDE_INT hi, lo;
+ REAL_VALUE_TYPE r;
+
+ real_round (&r, TYPE_MODE (ftype), &x);
+ REAL_VALUE_TO_INT (&lo, &hi, r);
+ result = build_int_cst_wide (NULL_TREE, lo, hi);
+ if (int_fits_type_p (result, itype))
+ return fold_convert (itype, result);
+ }
+ }
+
+ return fold_fixed_mathfn (exp);
+}
+
/* Fold function call to builtin ffs, clz, ctz, popcount and parity
and their long and long long variants (i.e. ffsl and ffsll).
Return NULL_TREE if no simplification can be made. */
{
HOST_WIDE_INT hi, width, result;
unsigned HOST_WIDE_INT lo;
- tree type, t;
+ tree type;
type = TREE_TYPE (arg);
width = TYPE_PRECISION (type);
break;
default:
- abort();
+ gcc_unreachable ();
}
- t = build_int_2 (result, 0);
- TREE_TYPE (t) = TREE_TYPE (exp);
- return t;
+ return build_int_cst (TREE_TYPE (exp), result);
}
return NULL_TREE;
}
/* A subroutine of fold_builtin to fold the various logarithmic
- functions. EXP is the CALL_EXPR of a call to a builtin log*
- function. VALUE is the base of the log* function. */
+ functions. EXP is the CALL_EXPR of a call to a builtin logN
+ function. VALUE is the base of the logN function. */
static tree
fold_builtin_logarithm (tree exp, const REAL_VALUE_TYPE *value)
tree type = TREE_TYPE (TREE_TYPE (fndecl));
tree arg = TREE_VALUE (arglist);
const enum built_in_function fcode = builtin_mathfn_code (arg);
-
- /* Optimize log*(1.0) = 0.0. */
+
+ /* Optimize logN(1.0) = 0.0. */
if (real_onep (arg))
return build_real (type, dconst0);
if (real_dconstp (arg, &value_truncate))
return build_real (type, dconst1);
}
-
+
/* Special case, optimize logN(expN(x)) = x. */
if (flag_unsafe_math_optimizations
&& ((value == &dconste
&& (fcode == BUILT_IN_EXP2
|| fcode == BUILT_IN_EXP2F
|| fcode == BUILT_IN_EXP2L))
- || (value == &dconst10
- && (fcode == BUILT_IN_EXP10
- || fcode == BUILT_IN_EXP10F
- || fcode == BUILT_IN_EXP10L))))
- return convert (type, TREE_VALUE (TREE_OPERAND (arg, 1)));
+ || (value == &dconst10 && (BUILTIN_EXP10_P (fcode)))))
+ return fold_convert (type, TREE_VALUE (TREE_OPERAND (arg, 1)));
- /* Optimize log*(func()) for various exponential functions. We
+ /* Optimize logN(func()) for various exponential functions. We
want to determine the value "x" and the power "exponent" in
order to transform logN(x**exponent) into exponent*logN(x). */
if (flag_unsafe_math_optimizations)
{
tree exponent = 0, x = 0;
-
+
switch (fcode)
{
case BUILT_IN_EXP:
tree logfn;
arglist = build_tree_list (NULL_TREE, x);
logfn = build_function_call_expr (fndecl, arglist);
- return fold (build (MULT_EXPR, type, exponent, logfn));
+ return fold (build2 (MULT_EXPR, type, exponent, logfn));
}
}
}
return 0;
}
-
+
/* A subroutine of fold_builtin to fold the various exponent
functions. EXP is the CALL_EXPR of a call to a builtin function.
VALUE is the value which will be raised to a power. */
&& (fcode == BUILT_IN_LOG10
|| fcode == BUILT_IN_LOG10F
|| fcode == BUILT_IN_LOG10L)))
- return convert (type, TREE_VALUE (TREE_OPERAND (arg, 1)));
+ return fold_convert (type, TREE_VALUE (TREE_OPERAND (arg, 1)));
}
}
/* If SRC and DEST are the same (and not volatile), return DEST+LEN. */
if (operand_equal_p (src, dest, 0))
{
- tree temp = convert (TREE_TYPE (dest), len);
- temp = fold (build (PLUS_EXPR, TREE_TYPE (dest), dest, len));
- return convert (TREE_TYPE (exp), temp);
+ tree temp = fold_convert (TREE_TYPE (dest), len);
+ temp = fold (build2 (PLUS_EXPR, TREE_TYPE (dest), dest, temp));
+ return fold_convert (TREE_TYPE (exp), temp);
}
return 0;
return 0;
}
-/* Fold function call to builtin strcpy. Return
- NULL_TREE if no simplification can be made. */
+/* Fold function call to builtin strcpy. If LEN is not NULL, it represents
+ the length of the string to be copied. Return NULL_TREE if no
+ simplification can be made. */
-static tree
-fold_builtin_strcpy (tree exp)
+tree
+fold_builtin_strcpy (tree exp, tree len)
{
tree arglist = TREE_OPERAND (exp, 1);
- tree dest, src;
+ tree dest, src, fn;
if (!validate_arglist (arglist,
POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
/* If SRC and DEST are the same (and not volatile), return DEST. */
if (operand_equal_p (src, dest, 0))
- return convert (TREE_TYPE (exp), dest);
+ return fold_convert (TREE_TYPE (exp), dest);
- return 0;
+ if (optimize_size)
+ return 0;
+
+ fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
+ return 0;
+
+ if (!len)
+ {
+ len = c_strlen (src, 1);
+ if (! len || TREE_SIDE_EFFECTS (len))
+ return 0;
+ }
+
+ len = size_binop (PLUS_EXPR, len, ssize_int (1));
+ arglist = build_tree_list (NULL_TREE, len);
+ arglist = tree_cons (NULL_TREE, src, arglist);
+ arglist = tree_cons (NULL_TREE, dest, arglist);
+ return fold_convert (TREE_TYPE (exp),
+ build_function_call_expr (fn, arglist));
}
-/* Fold function call to builtin strncpy. Return
- NULL_TREE if no simplification can be made. */
+/* Fold function call to builtin strncpy. If SLEN is not NULL, it represents
+ the length of the source string. Return NULL_TREE if no simplification
+ can be made. */
-static tree
-fold_builtin_strncpy (tree exp)
+tree
+fold_builtin_strncpy (tree exp, tree slen)
{
tree arglist = TREE_OPERAND (exp, 1);
- tree dest, src, len;
+ tree dest, src, len, fn;
if (!validate_arglist (arglist,
POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
if (integer_zerop (len))
return omit_one_operand (TREE_TYPE (exp), dest, src);
- return 0;
+ /* We can't compare slen with len as constants below if len is not a
+ constant. */
+ if (len == 0 || TREE_CODE (len) != INTEGER_CST)
+ return 0;
+
+ if (!slen)
+ slen = c_strlen (src, 1);
+
+ /* Now, we must be passed a constant src ptr parameter. */
+ if (slen == 0 || TREE_CODE (slen) != INTEGER_CST)
+ return 0;
+
+ slen = size_binop (PLUS_EXPR, slen, ssize_int (1));
+
+ /* We do not support simplification of this case, though we do
+ support it when expanding trees into RTL. */
+ /* FIXME: generate a call to __builtin_memset. */
+ if (tree_int_cst_lt (slen, len))
+ return 0;
+
+ /* OK transform into builtin memcpy. */
+ fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
+ return 0;
+ return fold_convert (TREE_TYPE (exp),
+ build_function_call_expr (fn, arglist));
+}
+
+/* Fold function call to builtin strchr and strrchr.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_strchr (tree exp, bool actually_strrchr)
+{
+ tree arglist = TREE_OPERAND (exp, 1);
+ if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ const char *p1;
+
+ if (TREE_CODE (s2) != INTEGER_CST)
+ return 0;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ char c;
+ const char *r;
+
+ if (target_char_cast (s2, &c))
+ return 0;
+
+ r = actually_strrchr ? strrchr (p1, c) : strchr (p1, c);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
+ s1, build_int_cst (TREE_TYPE (s1), r - p1)));
+ }
+
+ if (actually_strrchr)
+ {
+ tree fn;
+
+ if (!integer_zerop (s2))
+ return 0;
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return 0;
+
+ /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
+ return build_function_call_expr (fn, arglist);
+ }
+
+ return 0;
+ }
}
/* Fold function call to builtin memcmp. Return
NULL_TREE if no simplification can be made. */
static tree
-fold_builtin_memcmp (tree exp)
+fold_builtin_memcmp (tree arglist)
{
- tree arglist = TREE_OPERAND (exp, 1);
tree arg1, arg2, len;
+ const char *p1, *p2;
if (!validate_arglist (arglist,
POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
/* If the LEN parameter is zero, return zero. */
if (integer_zerop (len))
- {
- tree temp = omit_one_operand (TREE_TYPE (exp), integer_zero_node, arg2);
- return omit_one_operand (TREE_TYPE (exp), temp, arg1);
- }
+ return omit_two_operands (integer_type_node, integer_zero_node,
+ arg1, arg2);
/* If ARG1 and ARG2 are the same (and not volatile), return zero. */
if (operand_equal_p (arg1, arg2, 0))
- return omit_one_operand (TREE_TYPE (exp), integer_zero_node, len);
+ return omit_one_operand (integer_type_node, integer_zero_node, len);
+
+ p1 = c_getstr (arg1);
+ p2 = c_getstr (arg2);
+
+ /* If all arguments are constant, and the value of len is not greater
+ than the lengths of arg1 and arg2, evaluate at compile-time. */
+ if (host_integerp (len, 1) && p1 && p2
+ && compare_tree_int (len, strlen (p1) + 1) <= 0
+ && compare_tree_int (len, strlen (p2) + 1) <= 0)
+ {
+ const int r = memcmp (p1, p2, tree_low_cst (len, 1));
+
+ if (r > 0)
+ return integer_one_node;
+ else if (r < 0)
+ return integer_minus_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ /* If len parameter is one, return an expression corresponding to
+ (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
+ if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ tree ind1 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ tree ind2 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold (build2 (MINUS_EXPR, integer_type_node, ind1, ind2));
+ }
return 0;
}
NULL_TREE if no simplification can be made. */
static tree
-fold_builtin_strcmp (tree exp)
+fold_builtin_strcmp (tree arglist)
{
- tree arglist = TREE_OPERAND (exp, 1);
tree arg1, arg2;
const char *p1, *p2;
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
return 0;
arg1 = TREE_VALUE (arglist);
/* If ARG1 and ARG2 are the same (and not volatile), return zero. */
if (operand_equal_p (arg1, arg2, 0))
- return convert (TREE_TYPE (exp), integer_zero_node);
+ return integer_zero_node;
p1 = c_getstr (arg1);
p2 = c_getstr (arg2);
if (p1 && p2)
{
- tree temp;
const int i = strcmp (p1, p2);
if (i < 0)
- temp = integer_minus_one_node;
+ return integer_minus_one_node;
else if (i > 0)
- temp = integer_one_node;
+ return integer_one_node;
else
- temp = integer_zero_node;
- return convert (TREE_TYPE (exp), temp);
+ return integer_zero_node;
+ }
+
+ /* If the second arg is "", return *(const unsigned char*)arg1. */
+ if (p2 && *p2 == '\0')
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ return fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ }
+
+ /* If the first arg is "", return -*(const unsigned char*)arg2. */
+ if (p1 && *p1 == '\0')
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ tree temp = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold (build1 (NEGATE_EXPR, integer_type_node, temp));
}
return 0;
NULL_TREE if no simplification can be made. */
static tree
-fold_builtin_strncmp (tree exp)
+fold_builtin_strncmp (tree arglist)
{
- tree arglist = TREE_OPERAND (exp, 1);
tree arg1, arg2, len;
const char *p1, *p2;
/* If the LEN parameter is zero, return zero. */
if (integer_zerop (len))
- {
- tree temp = omit_one_operand (TREE_TYPE (exp), integer_zero_node, arg2);
- return omit_one_operand (TREE_TYPE (exp), temp, arg1);
- }
+ return omit_two_operands (integer_type_node, integer_zero_node,
+ arg1, arg2);
/* If ARG1 and ARG2 are the same (and not volatile), return zero. */
if (operand_equal_p (arg1, arg2, 0))
- return omit_one_operand (TREE_TYPE (exp), integer_zero_node, len);
+ return omit_one_operand (integer_type_node, integer_zero_node, len);
p1 = c_getstr (arg1);
p2 = c_getstr (arg2);
if (host_integerp (len, 1) && p1 && p2)
{
- tree temp;
const int i = strncmp (p1, p2, tree_low_cst (len, 1));
- if (i < 0)
- temp = integer_minus_one_node;
- else if (i > 0)
- temp = integer_one_node;
+ if (i > 0)
+ return integer_one_node;
+ else if (i < 0)
+ return integer_minus_one_node;
else
- temp = integer_zero_node;
- return convert (TREE_TYPE (exp), temp);
+ return integer_zero_node;
+ }
+
+ /* If the second arg is "", and the length is greater than zero,
+ return *(const unsigned char*)arg1. */
+ if (p2 && *p2 == '\0'
+ && TREE_CODE (len) == INTEGER_CST
+ && tree_int_cst_sgn (len) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ return fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ }
+
+ /* If the first arg is "", and the length is greater than zero,
+ return -*(const unsigned char*)arg2. */
+ if (p1 && *p1 == '\0'
+ && TREE_CODE (len) == INTEGER_CST
+ && tree_int_cst_sgn (len) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ tree temp = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold (build1 (NEGATE_EXPR, integer_type_node, temp));
+ }
+
+ /* If len parameter is one, return an expression corresponding to
+ (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
+ if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
+ tree ind1 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ tree ind2 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold (build2 (MINUS_EXPR, integer_type_node, ind1, ind2));
}
return 0;
c = TREE_REAL_CST (arg);
temp = REAL_VALUE_NEGATIVE (c) ? integer_one_node : integer_zero_node;
- return convert (TREE_TYPE (exp), temp);
+ return fold_convert (TREE_TYPE (exp), temp);
}
/* If ARG is non-negative, the result is always zero. */
/* If ARG's format doesn't have signed zeros, return "arg < 0.0". */
if (!HONOR_SIGNED_ZEROS (TYPE_MODE (TREE_TYPE (arg))))
- return fold (build (LT_EXPR, TREE_TYPE (exp), arg,
- build_real (TREE_TYPE (arg), dconst0)));
+ return fold (build2 (LT_EXPR, TREE_TYPE (exp), arg,
+ build_real (TREE_TYPE (arg), dconst0)));
return NULL_TREE;
}
+/* Fold function call to builtin copysign, copysignf or copysignl.
+ Return NULL_TREE if no simplification can be made. */
-/* Used by constant folding to eliminate some builtin calls early. EXP is
- the CALL_EXPR of a call to a builtin function. */
-
-tree
-fold_builtin (tree exp)
+static tree
+fold_builtin_copysign (tree arglist, tree type)
{
- tree fndecl = get_callee_fndecl (exp);
- tree arglist = TREE_OPERAND (exp, 1);
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ tree arg1, arg2;
- if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
- return 0;
+ if (!validate_arglist (arglist, REAL_TYPE, REAL_TYPE, VOID_TYPE))
+ return NULL_TREE;
- switch (DECL_FUNCTION_CODE (fndecl))
- {
- case BUILT_IN_CONSTANT_P:
- return fold_builtin_constant_p (arglist);
+ arg1 = TREE_VALUE (arglist);
+ arg2 = TREE_VALUE (TREE_CHAIN (arglist));
- case BUILT_IN_CLASSIFY_TYPE:
- return fold_builtin_classify_type (arglist);
+ /* copysign(X,X) is X. */
+ if (operand_equal_p (arg1, arg2, 0))
+ return fold_convert (type, arg1);
- case BUILT_IN_STRLEN:
- if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
- {
- tree len = c_strlen (TREE_VALUE (arglist), 0);
- if (len)
- {
- /* Convert from the internal "sizetype" type to "size_t". */
- if (size_type_node)
- len = convert (size_type_node, len);
- return len;
- }
- }
- break;
+ /* If ARG1 and ARG2 are compile-time constants, determine the result. */
+ if (TREE_CODE (arg1) == REAL_CST
+ && TREE_CODE (arg2) == REAL_CST
+ && !TREE_CONSTANT_OVERFLOW (arg1)
+ && !TREE_CONSTANT_OVERFLOW (arg2))
+ {
+ REAL_VALUE_TYPE c1, c2;
- case BUILT_IN_FABS:
- case BUILT_IN_FABSF:
- case BUILT_IN_FABSL:
- if (validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
- return fold (build1 (ABS_EXPR, type, TREE_VALUE (arglist)));
- break;
+ c1 = TREE_REAL_CST (arg1);
+ c2 = TREE_REAL_CST (arg2);
+ real_copysign (&c1, &c2);
+ return build_real (type, c1);
+ c1.sign = c2.sign;
+ }
- case BUILT_IN_CABS:
- case BUILT_IN_CABSF:
- case BUILT_IN_CABSL:
- return fold_builtin_cabs (fndecl, arglist, type);
+ /* copysign(X, Y) is fabs(X) when Y is always non-negative.
+ Remember to evaluate Y for side-effects. */
+ if (tree_expr_nonnegative_p (arg2))
+ return omit_one_operand (type,
+ fold (build1 (ABS_EXPR, type, arg1)),
+ arg2);
- case BUILT_IN_SQRT:
- case BUILT_IN_SQRTF:
- case BUILT_IN_SQRTL:
- if (validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
- {
- enum built_in_function fcode;
- tree arg = TREE_VALUE (arglist);
+ return NULL_TREE;
+}
- /* Optimize sqrt of constant value. */
+/* Fold a call to builtin isascii. */
+
+static tree
+fold_builtin_isascii (tree arglist)
+{
+ if (! validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ /* Transform isascii(c) -> ((c & ~0x7f) == 0). */
+ tree arg = TREE_VALUE (arglist);
+
+ arg = build2 (BIT_AND_EXPR, integer_type_node, arg,
+ build_int_cst (NULL_TREE,
+ ~ (unsigned HOST_WIDE_INT) 0x7f));
+ arg = fold (build2 (EQ_EXPR, integer_type_node,
+ arg, integer_zero_node));
+
+ if (in_gimple_form && !TREE_CONSTANT (arg))
+ return NULL_TREE;
+ else
+ return arg;
+ }
+}
+
+/* Fold a call to builtin toascii. */
+
+static tree
+fold_builtin_toascii (tree arglist)
+{
+ if (! validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ /* Transform toascii(c) -> (c & 0x7f). */
+ tree arg = TREE_VALUE (arglist);
+
+ return fold (build2 (BIT_AND_EXPR, integer_type_node, arg,
+ build_int_cst (NULL_TREE, 0x7f)));
+ }
+}
+
+/* Fold a call to builtin isdigit. */
+
+static tree
+fold_builtin_isdigit (tree arglist)
+{
+ if (! validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */
+ /* According to the C standard, isdigit is unaffected by locale. */
+ tree arg = TREE_VALUE (arglist);
+ arg = fold_convert (unsigned_type_node, arg);
+ arg = build2 (MINUS_EXPR, unsigned_type_node, arg,
+ build_int_cst (unsigned_type_node, TARGET_DIGIT0));
+ arg = build2 (LE_EXPR, integer_type_node, arg,
+ build_int_cst (unsigned_type_node, 9));
+ arg = fold (arg);
+ if (in_gimple_form && !TREE_CONSTANT (arg))
+ return NULL_TREE;
+ else
+ return arg;
+ }
+}
+
+/* Fold a call to fabs, fabsf or fabsl. */
+
+static tree
+fold_builtin_fabs (tree arglist, tree type)
+{
+ tree arg;
+
+ if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ return 0;
+
+ arg = TREE_VALUE (arglist);
+ if (TREE_CODE (arg) == REAL_CST)
+ return fold_abs_const (arg, type);
+ return fold (build1 (ABS_EXPR, type, arg));
+}
+
+/* Fold a call to abs, labs, llabs or imaxabs. */
+
+static tree
+fold_builtin_abs (tree arglist, tree type)
+{
+ tree arg;
+
+ if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+
+ arg = TREE_VALUE (arglist);
+ if (TREE_CODE (arg) == INTEGER_CST)
+ return fold_abs_const (arg, type);
+ return fold (build1 (ABS_EXPR, type, arg));
+}
+
+/* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite.
+ EXP is the CALL_EXPR for the call. */
+
+static tree
+fold_builtin_classify (tree exp, int builtin_index)
+{
+ tree fndecl = get_callee_fndecl (exp);
+ tree arglist = TREE_OPERAND (exp, 1);
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ tree arg;
+ REAL_VALUE_TYPE r;
+
+ if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ {
+ /* Check that we have exactly one argument. */
+ if (arglist == 0)
+ {
+ error ("too few arguments to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+ else if (TREE_CHAIN (arglist) != 0)
+ {
+ error ("too many arguments to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+ else
+ {
+ error ("non-floating-point argument to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+ }
+
+ arg = TREE_VALUE (arglist);
+ switch (builtin_index)
+ {
+ case BUILT_IN_ISINF:
+ if (!MODE_HAS_INFINITIES (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ if (real_isinf (&r))
+ return real_compare (GT_EXPR, &r, &dconst0)
+ ? integer_one_node : integer_minus_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ return NULL_TREE;
+
+ case BUILT_IN_FINITE:
+ if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg)))
+ && !MODE_HAS_INFINITIES (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ return real_isinf (&r) || real_isnan (&r)
+ ? integer_zero_node : integer_one_node;
+ }
+
+ return NULL_TREE;
+
+ case BUILT_IN_ISNAN:
+ if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ return real_isnan (&r) ? integer_one_node : integer_zero_node;
+ }
+
+ arg = builtin_save_expr (arg);
+ return fold (build2 (UNORDERED_EXPR, type, arg, arg));
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Fold a call to an unordered comparison function such as
+ __builtin_isgreater(). EXP is the CALL_EXPR for the call.
+ UNORDERED_CODE and ORDERED_CODE are comparison codes that give
+ the opposite of the desired result. UNORDERED_CODE is used
+ for modes that can hold NaNs and ORDERED_CODE is used for
+ the rest. */
+
+static tree
+fold_builtin_unordered_cmp (tree exp,
+ enum tree_code unordered_code,
+ enum tree_code ordered_code)
+{
+ tree fndecl = get_callee_fndecl (exp);
+ tree arglist = TREE_OPERAND (exp, 1);
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum tree_code code;
+ tree arg0, arg1;
+
+ if (!validate_arglist (arglist, REAL_TYPE, REAL_TYPE, VOID_TYPE))
+ {
+ enum tree_code code0, code1;
+ tree type0, type1;
+ tree cmp_type = 0;
+
+ /* Check that we have exactly two arguments. */
+ if (arglist == 0 || TREE_CHAIN (arglist) == 0)
+ {
+ error ("too few arguments to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+ else if (TREE_CHAIN (TREE_CHAIN (arglist)) != 0)
+ {
+ error ("too many arguments to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+
+ arg0 = TREE_VALUE (arglist);
+ arg1 = TREE_VALUE (TREE_CHAIN (arglist));
+
+ type0 = TREE_TYPE (arg0);
+ type1 = TREE_TYPE (arg1);
+
+ code0 = TREE_CODE (type0);
+ code1 = TREE_CODE (type1);
+
+ if (code0 == REAL_TYPE && code1 == REAL_TYPE)
+ /* Choose the wider of two real types. */
+ cmp_type = TYPE_PRECISION (type0) >= TYPE_PRECISION (type1)
+ ? type0 : type1;
+ else if (code0 == REAL_TYPE && code1 == INTEGER_TYPE)
+ cmp_type = type0;
+ else if (code0 == INTEGER_TYPE && code1 == REAL_TYPE)
+ cmp_type = type1;
+ else
+ {
+ error ("non-floating-point argument to function `%s'",
+ IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ return error_mark_node;
+ }
+
+ arg0 = fold_convert (cmp_type, arg0);
+ arg1 = fold_convert (cmp_type, arg1);
+ }
+ else
+ {
+ arg0 = TREE_VALUE (arglist);
+ arg1 = TREE_VALUE (TREE_CHAIN (arglist));
+ }
+
+ if (unordered_code == UNORDERED_EXPR)
+ {
+ if (!MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg0))))
+ return omit_two_operands (type, integer_zero_node, arg0, arg1);
+ return fold (build2 (UNORDERED_EXPR, type, arg0, arg1));
+ }
+
+ code = MODE_HAS_NANS (TYPE_MODE (TREE_TYPE (arg0))) ? unordered_code
+ : ordered_code;
+ return fold (build1 (TRUTH_NOT_EXPR, type,
+ fold (build2 (code, type, arg0, arg1))));
+}
+
+/* Used by constant folding to simplify calls to builtin functions. EXP is
+ the CALL_EXPR of a call to a builtin function. IGNORE is true if the
+ result of the function call is ignored. This function returns NULL_TREE
+ if no simplification was possible. */
+
+static tree
+fold_builtin_1 (tree exp, bool ignore)
+{
+ tree fndecl = get_callee_fndecl (exp);
+ tree arglist = TREE_OPERAND (exp, 1);
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ return 0;
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_CONSTANT_P:
+ return fold_builtin_constant_p (arglist);
+
+ case BUILT_IN_EXPECT:
+ return fold_builtin_expect (arglist);
+
+ case BUILT_IN_CLASSIFY_TYPE:
+ return fold_builtin_classify_type (arglist);
+
+ case BUILT_IN_STRLEN:
+ if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
+ {
+ tree len = c_strlen (TREE_VALUE (arglist), 0);
+ if (len)
+ {
+ /* Convert from the internal "sizetype" type to "size_t". */
+ if (size_type_node)
+ len = fold_convert (size_type_node, len);
+ return len;
+ }
+ }
+ break;
+
+ case BUILT_IN_FABS:
+ case BUILT_IN_FABSF:
+ case BUILT_IN_FABSL:
+ return fold_builtin_fabs (arglist, type);
+
+ case BUILT_IN_ABS:
+ case BUILT_IN_LABS:
+ case BUILT_IN_LLABS:
+ case BUILT_IN_IMAXABS:
+ return fold_builtin_abs (arglist, type);
+
+ case BUILT_IN_CONJ:
+ case BUILT_IN_CONJF:
+ case BUILT_IN_CONJL:
+ if (validate_arglist (arglist, COMPLEX_TYPE, VOID_TYPE))
+ return fold (build1 (CONJ_EXPR, type, TREE_VALUE (arglist)));
+ break;
+
+ case BUILT_IN_CREAL:
+ case BUILT_IN_CREALF:
+ case BUILT_IN_CREALL:
+ if (validate_arglist (arglist, COMPLEX_TYPE, VOID_TYPE))
+ return non_lvalue (fold (build1 (REALPART_EXPR, type,
+ TREE_VALUE (arglist))));
+ break;
+
+ case BUILT_IN_CIMAG:
+ case BUILT_IN_CIMAGF:
+ case BUILT_IN_CIMAGL:
+ if (validate_arglist (arglist, COMPLEX_TYPE, VOID_TYPE))
+ return non_lvalue (fold (build1 (IMAGPART_EXPR, type,
+ TREE_VALUE (arglist))));
+ break;
+
+ case BUILT_IN_CABS:
+ case BUILT_IN_CABSF:
+ case BUILT_IN_CABSL:
+ return fold_builtin_cabs (arglist, type);
+
+ case BUILT_IN_SQRT:
+ case BUILT_IN_SQRTF:
+ case BUILT_IN_SQRTL:
+ if (validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ {
+ enum built_in_function fcode;
+ tree arg = TREE_VALUE (arglist);
+
+ /* Optimize sqrt of constant value. */
if (TREE_CODE (arg) == REAL_CST
&& ! TREE_CONSTANT_OVERFLOW (arg))
{
return build_real (type, r);
}
- /* Optimize sqrt(exp(x)) = exp(x*0.5). */
+ /* Optimize sqrt(expN(x)) = expN(x*0.5). */
fcode = builtin_mathfn_code (arg);
- if (flag_unsafe_math_optimizations
- && (fcode == BUILT_IN_EXP
- || fcode == BUILT_IN_EXPF
- || fcode == BUILT_IN_EXPL))
+ if (flag_unsafe_math_optimizations && BUILTIN_EXPONENT_P (fcode))
{
tree expfn = TREE_OPERAND (TREE_OPERAND (arg, 0), 0);
- arg = fold (build (MULT_EXPR, type,
- TREE_VALUE (TREE_OPERAND (arg, 1)),
- build_real (type, dconsthalf)));
+ arg = fold (build2 (MULT_EXPR, type,
+ TREE_VALUE (TREE_OPERAND (arg, 1)),
+ build_real (type, dconsthalf)));
arglist = build_tree_list (NULL_TREE, arg);
return build_function_call_expr (expfn, arglist);
}
+ /* Optimize sqrt(Nroot(x)) -> pow(x,1/(2*N)). */
+ if (flag_unsafe_math_optimizations && BUILTIN_ROOT_P (fcode))
+ {
+ tree powfn = mathfn_built_in (type, BUILT_IN_POW);
+
+ if (powfn)
+ {
+ tree arg0 = TREE_VALUE (TREE_OPERAND (arg, 1));
+ tree tree_root;
+ /* The inner root was either sqrt or cbrt. */
+ REAL_VALUE_TYPE dconstroot =
+ BUILTIN_SQRT_P (fcode) ? dconsthalf : dconstthird;
+
+ /* Adjust for the outer root. */
+ SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
+ dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
+ tree_root = build_real (type, dconstroot);
+ arglist = tree_cons (NULL_TREE, arg0,
+ build_tree_list (NULL_TREE, tree_root));
+ return build_function_call_expr (powfn, arglist);
+ }
+ }
+
/* Optimize sqrt(pow(x,y)) = pow(x,y*0.5). */
if (flag_unsafe_math_optimizations
&& (fcode == BUILT_IN_POW
tree powfn = TREE_OPERAND (TREE_OPERAND (arg, 0), 0);
tree arg0 = TREE_VALUE (TREE_OPERAND (arg, 1));
tree arg1 = TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg, 1)));
- tree narg1 = fold (build (MULT_EXPR, type, arg1,
- build_real (type, dconsthalf)));
+ tree narg1 = fold (build2 (MULT_EXPR, type, arg1,
+ build_real (type, dconsthalf)));
arglist = tree_cons (NULL_TREE, arg0,
build_tree_list (NULL_TREE, narg1));
return build_function_call_expr (powfn, arglist);
}
break;
+ case BUILT_IN_CBRT:
+ case BUILT_IN_CBRTF:
+ case BUILT_IN_CBRTL:
+ if (validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
+ {
+ tree arg = TREE_VALUE (arglist);
+ const enum built_in_function fcode = builtin_mathfn_code (arg);
+
+ /* Optimize cbrt of constant value. */
+ if (real_zerop (arg) || real_onep (arg) || real_minus_onep (arg))
+ return arg;
+
+ /* Optimize cbrt(expN(x)) -> expN(x/3). */
+ if (flag_unsafe_math_optimizations && BUILTIN_EXPONENT_P (fcode))
+ {
+ tree expfn = TREE_OPERAND (TREE_OPERAND (arg, 0), 0);
+ const REAL_VALUE_TYPE third_trunc =
+ real_value_truncate (TYPE_MODE (type), dconstthird);
+ arg = fold (build2 (MULT_EXPR, type,
+ TREE_VALUE (TREE_OPERAND (arg, 1)),
+ build_real (type, third_trunc)));
+ arglist = build_tree_list (NULL_TREE, arg);
+ return build_function_call_expr (expfn, arglist);
+ }
+
+ /* Optimize cbrt(sqrt(x)) -> pow(x,1/6). */
+ /* We don't optimize cbrt(cbrt(x)) -> pow(x,1/9) because if
+ x is negative pow will error but cbrt won't. */
+ if (flag_unsafe_math_optimizations && BUILTIN_SQRT_P (fcode))
+ {
+ tree powfn = mathfn_built_in (type, BUILT_IN_POW);
+
+ if (powfn)
+ {
+ tree arg0 = TREE_VALUE (TREE_OPERAND (arg, 1));
+ tree tree_root;
+ REAL_VALUE_TYPE dconstroot = dconstthird;
+
+ SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
+ dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
+ tree_root = build_real (type, dconstroot);
+ arglist = tree_cons (NULL_TREE, arg0,
+ build_tree_list (NULL_TREE, tree_root));
+ return build_function_call_expr (powfn, arglist);
+ }
+
+ }
+ }
+ break;
+
case BUILT_IN_SIN:
case BUILT_IN_SINF:
case BUILT_IN_SINL:
case BUILT_IN_EXPF:
case BUILT_IN_EXPL:
return fold_builtin_exponent (exp, &dconste);
+
case BUILT_IN_EXP2:
case BUILT_IN_EXP2F:
case BUILT_IN_EXP2L:
return fold_builtin_exponent (exp, &dconst2);
+
case BUILT_IN_EXP10:
case BUILT_IN_EXP10F:
case BUILT_IN_EXP10L:
case BUILT_IN_POW10F:
case BUILT_IN_POW10L:
return fold_builtin_exponent (exp, &dconst10);
+
case BUILT_IN_LOG:
case BUILT_IN_LOGF:
case BUILT_IN_LOGL:
return fold_builtin_logarithm (exp, &dconste);
- break;
+
case BUILT_IN_LOG2:
case BUILT_IN_LOG2F:
case BUILT_IN_LOG2L:
return fold_builtin_logarithm (exp, &dconst2);
- break;
+
case BUILT_IN_LOG10:
case BUILT_IN_LOG10F:
case BUILT_IN_LOG10L:
return fold_builtin_logarithm (exp, &dconst10);
- break;
case BUILT_IN_TAN:
case BUILT_IN_TANF:
REAL_VALUE_TYPE cst;
real_convert (&cst, TYPE_MODE (type), &dconstpi);
- cst.exp -= 2;
+ SET_REAL_EXP (&cst, REAL_EXP (&cst) - 2);
return build_real (type, cst);
}
}
/* Optimize pow(x,-1.0) = 1.0/x. */
if (REAL_VALUES_EQUAL (c, dconstm1))
- return fold (build (RDIV_EXPR, type,
- build_real (type, dconst1),
- arg0));
+ return fold (build2 (RDIV_EXPR, type,
+ build_real (type, dconst1), arg0));
/* Optimize pow(x,0.5) = sqrt(x). */
if (flag_unsafe_math_optimizations
&& REAL_VALUES_EQUAL (c, dconsthalf))
{
- tree sqrtfn;
-
- fcode = DECL_FUNCTION_CODE (fndecl);
- if (fcode == BUILT_IN_POW)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRT];
- else if (fcode == BUILT_IN_POWF)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRTF];
- else if (fcode == BUILT_IN_POWL)
- sqrtfn = implicit_built_in_decls[BUILT_IN_SQRTL];
- else
- sqrtfn = NULL_TREE;
+ tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
if (sqrtfn != NULL_TREE)
{
}
}
- /* Optimize pow(exp(x),y) = exp(x*y). */
+ /* Optimize pow(expN(x),y) = expN(x*y). */
fcode = builtin_mathfn_code (arg0);
- if (flag_unsafe_math_optimizations
- && (fcode == BUILT_IN_EXP
- || fcode == BUILT_IN_EXPF
- || fcode == BUILT_IN_EXPL))
+ if (flag_unsafe_math_optimizations && BUILTIN_EXPONENT_P (fcode))
{
tree expfn = TREE_OPERAND (TREE_OPERAND (arg0, 0), 0);
tree arg = TREE_VALUE (TREE_OPERAND (arg0, 1));
- arg = fold (build (MULT_EXPR, type, arg, arg1));
+ arg = fold (build2 (MULT_EXPR, type, arg, arg1));
arglist = build_tree_list (NULL_TREE, arg);
return build_function_call_expr (expfn, arglist);
}
/* Optimize pow(sqrt(x),y) = pow(x,y*0.5). */
- if (flag_unsafe_math_optimizations
- && (fcode == BUILT_IN_SQRT
- || fcode == BUILT_IN_SQRTF
- || fcode == BUILT_IN_SQRTL))
+ if (flag_unsafe_math_optimizations && BUILTIN_SQRT_P (fcode))
{
tree narg0 = TREE_VALUE (TREE_OPERAND (arg0, 1));
- tree narg1 = fold (build (MULT_EXPR, type, arg1,
- build_real (type, dconsthalf)));
+ tree narg1 = fold (build2 (MULT_EXPR, type, arg1,
+ build_real (type, dconsthalf)));
arglist = tree_cons (NULL_TREE, narg0,
build_tree_list (NULL_TREE, narg1));
{
tree arg00 = TREE_VALUE (TREE_OPERAND (arg0, 1));
tree arg01 = TREE_VALUE (TREE_CHAIN (TREE_OPERAND (arg0, 1)));
- tree narg1 = fold (build (MULT_EXPR, type, arg01, arg1));
+ tree narg1 = fold (build2 (MULT_EXPR, type, arg01, arg1));
arglist = tree_cons (NULL_TREE, arg00,
build_tree_list (NULL_TREE, narg1));
return build_function_call_expr (fndecl, arglist);
case BUILT_IN_NEARBYINT:
case BUILT_IN_NEARBYINTF:
case BUILT_IN_NEARBYINTL:
+ case BUILT_IN_RINT:
+ case BUILT_IN_RINTF:
+ case BUILT_IN_RINTL:
return fold_trunc_transparent_mathfn (exp);
+ case BUILT_IN_LROUND:
+ case BUILT_IN_LROUNDF:
+ case BUILT_IN_LROUNDL:
+ case BUILT_IN_LLROUND:
+ case BUILT_IN_LLROUNDF:
+ case BUILT_IN_LLROUNDL:
+ return fold_builtin_lround (exp);
+
+ case BUILT_IN_LRINT:
+ case BUILT_IN_LRINTF:
+ case BUILT_IN_LRINTL:
+ case BUILT_IN_LLRINT:
+ case BUILT_IN_LLRINTF:
+ case BUILT_IN_LLRINTL:
+ return fold_fixed_mathfn (exp);
+
case BUILT_IN_FFS:
case BUILT_IN_FFSL:
case BUILT_IN_FFSLL:
return fold_builtin_memmove (exp);
case BUILT_IN_STRCPY:
- return fold_builtin_strcpy (exp);
+ return fold_builtin_strcpy (exp, NULL_TREE);
case BUILT_IN_STRNCPY:
- return fold_builtin_strncpy (exp);
+ return fold_builtin_strncpy (exp, NULL_TREE);
+
+ case BUILT_IN_INDEX:
+ case BUILT_IN_STRCHR:
+ return fold_builtin_strchr (exp, false);
+
+ case BUILT_IN_RINDEX:
+ case BUILT_IN_STRRCHR:
+ return fold_builtin_strchr (exp, true);
case BUILT_IN_MEMCMP:
- return fold_builtin_memcmp (exp);
+ return fold_builtin_memcmp (arglist);
case BUILT_IN_STRCMP:
- return fold_builtin_strcmp (exp);
+ return fold_builtin_strcmp (arglist);
case BUILT_IN_STRNCMP:
- return fold_builtin_strncmp (exp);
+ return fold_builtin_strncmp (arglist);
case BUILT_IN_SIGNBIT:
case BUILT_IN_SIGNBITF:
case BUILT_IN_SIGNBITL:
return fold_builtin_signbit (exp);
+ case BUILT_IN_ISASCII:
+ return fold_builtin_isascii (arglist);
+
+ case BUILT_IN_TOASCII:
+ return fold_builtin_toascii (arglist);
+
+ case BUILT_IN_ISDIGIT:
+ return fold_builtin_isdigit (arglist);
+
+ case BUILT_IN_COPYSIGN:
+ case BUILT_IN_COPYSIGNF:
+ case BUILT_IN_COPYSIGNL:
+ return fold_builtin_copysign (arglist, type);
+
+ case BUILT_IN_FINITE:
+ case BUILT_IN_FINITEF:
+ case BUILT_IN_FINITEL:
+ return fold_builtin_classify (exp, BUILT_IN_FINITE);
+
+ case BUILT_IN_ISINF:
+ case BUILT_IN_ISINFF:
+ case BUILT_IN_ISINFL:
+ return fold_builtin_classify (exp, BUILT_IN_ISINF);
+
+ case BUILT_IN_ISNAN:
+ case BUILT_IN_ISNANF:
+ case BUILT_IN_ISNANL:
+ return fold_builtin_classify (exp, BUILT_IN_ISNAN);
+
+ case BUILT_IN_ISGREATER:
+ return fold_builtin_unordered_cmp (exp, UNLE_EXPR, LE_EXPR);
+ case BUILT_IN_ISGREATEREQUAL:
+ return fold_builtin_unordered_cmp (exp, UNLT_EXPR, LT_EXPR);
+ case BUILT_IN_ISLESS:
+ return fold_builtin_unordered_cmp (exp, UNGE_EXPR, GE_EXPR);
+ case BUILT_IN_ISLESSEQUAL:
+ return fold_builtin_unordered_cmp (exp, UNGT_EXPR, GT_EXPR);
+ case BUILT_IN_ISLESSGREATER:
+ return fold_builtin_unordered_cmp (exp, UNEQ_EXPR, EQ_EXPR);
+ case BUILT_IN_ISUNORDERED:
+ return fold_builtin_unordered_cmp (exp, UNORDERED_EXPR, NOP_EXPR);
+
+ case BUILT_IN_FPUTS:
+ return fold_builtin_fputs (arglist, ignore, false, NULL_TREE);
+
+ case BUILT_IN_FPUTS_UNLOCKED:
+ return fold_builtin_fputs (arglist, ignore, true, NULL_TREE);
+
default:
break;
}
return 0;
}
-/* Conveniently construct a function call expression. */
+/* A wrapper function for builtin folding that prevents warnings for
+ "statement without effect" and the like, caused by removing the
+ call node earlier than the warning is generated. */
+
+tree
+fold_builtin (tree exp, bool ignore)
+{
+ exp = fold_builtin_1 (exp, ignore);
+ if (exp)
+ {
+ /* ??? Don't clobber shared nodes such as integer_zero_node. */
+ if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c')
+ exp = build1 (NOP_EXPR, TREE_TYPE (exp), exp);
+ TREE_NO_WARNING (exp) = 1;
+ }
+ return exp;
+}
+
+/* Conveniently construct a function call expression. */
tree
build_function_call_expr (tree fn, tree arglist)
tree call_expr;
call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
- call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
- call_expr, arglist);
+ call_expr = build3 (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
+ call_expr, arglist, NULL_TREE);
return fold (call_expr);
}
return NULL_RTX;
}
-/* Instantiate all remaining CONSTANT_P_RTX nodes. */
+/* Returns true is EXP represents data that would potentially reside
+ in a readonly section. */
-void
-purge_builtin_constant_p (void)
+static bool
+readonly_data_expr (tree exp)
+{
+ STRIP_NOPS (exp);
+
+ if (TREE_CODE (exp) != ADDR_EXPR)
+ return false;
+
+ exp = get_base_address (TREE_OPERAND (exp, 0));
+ if (!exp)
+ return false;
+
+ /* Make sure we call decl_readonly_section only for trees it
+ can handle (since it returns true for everything it doesn't
+ understand). */
+ if (TREE_CODE (exp) == STRING_CST
+ || TREE_CODE (exp) == CONSTRUCTOR
+ || (TREE_CODE (exp) == VAR_DECL && TREE_STATIC (exp)))
+ return decl_readonly_section (exp, 0);
+ else
+ return false;
+}
+
+/* Front-end to the simplify_builtin_XXX routines.
+
+ EXP is a call to a builtin function. If possible try to simplify
+ that into a constant, expression or call to a more efficient
+ builtin function.
+
+ If IGNORE is nonzero, then the result of this builtin function
+ call is ignored.
+
+ If simplification is possible, return the simplified tree, otherwise
+ return NULL_TREE. */
+
+tree
+simplify_builtin (tree exp, int ignore)
+{
+ tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
+ tree arglist = TREE_OPERAND (exp, 1);
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree val;
+
+ switch (fcode)
+ {
+ case BUILT_IN_FPUTS:
+ val = fold_builtin_fputs (arglist, ignore, false, NULL_TREE);
+ break;
+ case BUILT_IN_FPUTS_UNLOCKED:
+ val = fold_builtin_fputs (arglist, ignore, true, NULL_TREE);
+ break;
+ case BUILT_IN_STRSTR:
+ val = simplify_builtin_strstr (arglist);
+ break;
+ case BUILT_IN_STRCAT:
+ val = simplify_builtin_strcat (arglist);
+ break;
+ case BUILT_IN_STRNCAT:
+ val = simplify_builtin_strncat (arglist);
+ break;
+ case BUILT_IN_STRSPN:
+ val = simplify_builtin_strspn (arglist);
+ break;
+ case BUILT_IN_STRCSPN:
+ val = simplify_builtin_strcspn (arglist);
+ break;
+ case BUILT_IN_STRCHR:
+ case BUILT_IN_INDEX:
+ val = simplify_builtin_strchr (arglist);
+ break;
+ case BUILT_IN_STRRCHR:
+ case BUILT_IN_RINDEX:
+ val = simplify_builtin_strrchr (arglist);
+ break;
+ case BUILT_IN_STRCPY:
+ val = fold_builtin_strcpy (exp, NULL_TREE);
+ break;
+ case BUILT_IN_STRNCPY:
+ val = fold_builtin_strncpy (exp, NULL_TREE);
+ break;
+ case BUILT_IN_STRCMP:
+ val = fold_builtin_strcmp (arglist);
+ break;
+ case BUILT_IN_STRNCMP:
+ val = fold_builtin_strncmp (arglist);
+ break;
+ case BUILT_IN_STRPBRK:
+ val = simplify_builtin_strpbrk (arglist);
+ break;
+ case BUILT_IN_BCMP:
+ case BUILT_IN_MEMCMP:
+ val = fold_builtin_memcmp (arglist);
+ break;
+ case BUILT_IN_VA_START:
+ simplify_builtin_va_start (arglist);
+ val = NULL_TREE;
+ break;
+ case BUILT_IN_SPRINTF:
+ val = simplify_builtin_sprintf (arglist, ignore);
+ break;
+ case BUILT_IN_CONSTANT_P:
+ val = fold_builtin_constant_p (arglist);
+ /* Gimplification will pull the CALL_EXPR for the builtin out of
+ an if condition. When not optimizing, we'll not CSE it back.
+ To avoid link error types of regressions, return false now. */
+ if (!val && !optimize)
+ val = integer_zero_node;
+ break;
+ default:
+ val = NULL_TREE;
+ break;
+ }
+
+ if (val)
+ val = fold_convert (TREE_TYPE (exp), val);
+ return val;
+}
+
+/* Simplify a call to the strstr builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strstr (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ tree fn;
+ const char *p1, *p2;
+
+ p2 = c_getstr (s2);
+ if (p2 == NULL)
+ return 0;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ const char *r = strstr (p1, p2);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
+ s1, build_int_cst (TREE_TYPE (s1), r - p1)));
+ }
+
+ if (p2[0] == '\0')
+ return s1;
+
+ if (p2[1] != '\0')
+ return 0;
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return 0;
+
+ /* New argument list transforming strstr(s1, s2) to
+ strchr(s1, s2[0]). */
+ arglist = build_tree_list (NULL_TREE,
+ build_int_cst (NULL_TREE, p2[0]));
+ arglist = tree_cons (NULL_TREE, s1, arglist);
+ return build_function_call_expr (fn, arglist);
+ }
+}
+
+/* Simplify a call to the strstr builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strchr (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ const char *p1;
+
+ if (TREE_CODE (s2) != INTEGER_CST)
+ return 0;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ char c;
+ const char *r;
+
+ if (target_char_cast (s2, &c))
+ return 0;
+
+ r = strchr (p1, c);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
+ s1, build_int_cst (TREE_TYPE (s1), r - p1)));
+ }
+
+ /* FIXME: Should use here strchrM optab so that ports can optimize
+ this. */
+ return 0;
+ }
+}
+
+/* Simplify a call to the strrchr builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strrchr (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ tree fn;
+ const char *p1;
+
+ if (TREE_CODE (s2) != INTEGER_CST)
+ return 0;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ char c;
+ const char *r;
+
+ if (target_char_cast (s2, &c))
+ return 0;
+
+ r = strrchr (p1, c);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
+ s1, build_int_cst (TREE_TYPE (s1), r - p1)));
+ }
+
+ if (! integer_zerop (s2))
+ return 0;
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return 0;
+
+ /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
+ return build_function_call_expr (fn, arglist);
+ }
+}
+
+/* Simplify a call to the strpbrk builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strpbrk (tree arglist)
{
- rtx insn, set, arg, new, note;
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ tree fn;
+ const char *p1, *p2;
- for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
- if (INSN_P (insn)
- && (set = single_set (insn)) != NULL_RTX
- && (GET_CODE (arg = SET_SRC (set)) == CONSTANT_P_RTX
- || (GET_CODE (arg) == SUBREG
- && (GET_CODE (arg = SUBREG_REG (arg))
- == CONSTANT_P_RTX))))
+ p2 = c_getstr (s2);
+ if (p2 == NULL)
+ return 0;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ const char *r = strpbrk (p1, p2);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ return fold (build2 (PLUS_EXPR, TREE_TYPE (s1),
+ s1, build_int_cst (TREE_TYPE (s1), r - p1)));
+ }
+
+ if (p2[0] == '\0')
+ /* strpbrk(x, "") == NULL.
+ Evaluate and ignore s1 in case it had side-effects. */
+ return omit_one_operand (TREE_TYPE (s1), integer_zero_node, s1);
+
+ if (p2[1] != '\0')
+ return 0; /* Really call strpbrk. */
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return 0;
+
+ /* New argument list transforming strpbrk(s1, s2) to
+ strchr(s1, s2[0]). */
+ arglist = build_tree_list (NULL_TREE,
+ build_int_cst (NULL_TREE, p2[0]));
+ arglist = tree_cons (NULL_TREE, s1, arglist);
+ return build_function_call_expr (fn, arglist);
+ }
+}
+
+/* Simplify a call to the strcat builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strcat (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree dst = TREE_VALUE (arglist),
+ src = TREE_VALUE (TREE_CHAIN (arglist));
+ const char *p = c_getstr (src);
+
+ /* If the string length is zero, return the dst parameter. */
+ if (p && *p == '\0')
+ return dst;
+
+ return 0;
+ }
+}
+
+/* Simplify a call to the strncat builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strncat (tree arglist)
+{
+ if (!validate_arglist (arglist,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree dst = TREE_VALUE (arglist);
+ tree src = TREE_VALUE (TREE_CHAIN (arglist));
+ tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
+ const char *p = c_getstr (src);
+
+ /* If the requested length is zero, or the src parameter string
+ length is zero, return the dst parameter. */
+ if (integer_zerop (len) || (p && *p == '\0'))
+ return omit_two_operands (TREE_TYPE (dst), dst, src, len);
+
+ /* If the requested len is greater than or equal to the string
+ length, call strcat. */
+ if (TREE_CODE (len) == INTEGER_CST && p
+ && compare_tree_int (len, strlen (p)) >= 0)
+ {
+ tree newarglist
+ = tree_cons (NULL_TREE, dst, build_tree_list (NULL_TREE, src));
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCAT];
+
+ /* If the replacement _DECL isn't initialized, don't do the
+ transformation. */
+ if (!fn)
+ return 0;
+
+ return build_function_call_expr (fn, newarglist);
+ }
+ return 0;
+ }
+}
+
+/* Simplify a call to the strspn builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strspn (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
+
+ /* If both arguments are constants, evaluate at compile-time. */
+ if (p1 && p2)
+ {
+ const size_t r = strspn (p1, p2);
+ return size_int (r);
+ }
+
+ /* If either argument is "", return 0. */
+ if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
+ /* Evaluate and ignore both arguments in case either one has
+ side-effects. */
+ return omit_two_operands (integer_type_node, integer_zero_node,
+ s1, s2);
+ return 0;
+ }
+}
+
+/* Simplify a call to the strcspn builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+simplify_builtin_strcspn (tree arglist)
+{
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+ else
+ {
+ tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
+ const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
+
+ /* If both arguments are constants, evaluate at compile-time. */
+ if (p1 && p2)
+ {
+ const size_t r = strcspn (p1, p2);
+ return size_int (r);
+ }
+
+ /* If the first argument is "", return 0. */
+ if (p1 && *p1 == '\0')
+ {
+ /* Evaluate and ignore argument s2 in case it has
+ side-effects. */
+ return omit_one_operand (integer_type_node,
+ integer_zero_node, s2);
+ }
+
+ /* If the second argument is "", return __builtin_strlen(s1). */
+ if (p2 && *p2 == '\0')
+ {
+ tree newarglist = build_tree_list (NULL_TREE, s1),
+ fn = implicit_built_in_decls[BUILT_IN_STRLEN];
+
+ /* If the replacement _DECL isn't initialized, don't do the
+ transformation. */
+ if (!fn)
+ return 0;
+
+ return build_function_call_expr (fn, newarglist);
+ }
+ return 0;
+ }
+}
+
+/* Fold a call to the fputs builtin. IGNORE is true if the value returned
+ by the builtin will be ignored. UNLOCKED is true is true if this
+ actually a call to fputs_unlocked. If LEN in non-NULL, it represents
+ the known length of the string. Return NULL_TREE if no simplification
+ was possible. */
+
+tree
+fold_builtin_fputs (tree arglist, bool ignore, bool unlocked, tree len)
+{
+ tree fn;
+ tree fn_fputc = unlocked ? implicit_built_in_decls[BUILT_IN_FPUTC_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FPUTC];
+ tree fn_fwrite = unlocked ? implicit_built_in_decls[BUILT_IN_FWRITE_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FWRITE];
+
+ /* If the return value is used, or the replacement _DECL isn't
+ initialized, don't do the transformation. */
+ if (!ignore || !fn_fputc || !fn_fwrite)
+ return 0;
+
+ /* Verify the arguments in the original call. */
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return 0;
+
+ if (! len)
+ len = c_strlen (TREE_VALUE (arglist), 0);
+
+ /* Get the length of the string passed to fputs. If the length
+ can't be determined, punt. */
+ if (!len
+ || TREE_CODE (len) != INTEGER_CST)
+ return 0;
+
+ switch (compare_tree_int (len, 1))
+ {
+ case -1: /* length is 0, delete the call entirely . */
+ return omit_one_operand (integer_type_node, integer_zero_node,
+ TREE_VALUE (TREE_CHAIN (arglist)));
+
+ case 0: /* length is 1, call fputc. */
{
- arg = XEXP (arg, 0);
- new = CONSTANT_P (arg) ? const1_rtx : const0_rtx;
- validate_change (insn, &SET_SRC (set), new, 0);
+ const char *p = c_getstr (TREE_VALUE (arglist));
- /* Remove the REG_EQUAL note from the insn. */
- if ((note = find_reg_note (insn, REG_EQUAL, NULL_RTX)) != 0)
- remove_note (insn, note);
+ if (p != NULL)
+ {
+ /* New argument list transforming fputs(string, stream) to
+ fputc(string[0], stream). */
+ arglist = build_tree_list (NULL_TREE,
+ TREE_VALUE (TREE_CHAIN (arglist)));
+ arglist = tree_cons (NULL_TREE,
+ build_int_cst (NULL_TREE, p[0]),
+ arglist);
+ fn = fn_fputc;
+ break;
+ }
}
+ /* FALLTHROUGH */
+ case 1: /* length is greater than 1, call fwrite. */
+ {
+ tree string_arg;
+
+ /* If optimizing for size keep fputs. */
+ if (optimize_size)
+ return 0;
+ string_arg = TREE_VALUE (arglist);
+ /* New argument list transforming fputs(string, stream) to
+ fwrite(string, 1, len, stream). */
+ arglist = build_tree_list (NULL_TREE,
+ TREE_VALUE (TREE_CHAIN (arglist)));
+ arglist = tree_cons (NULL_TREE, len, arglist);
+ arglist = tree_cons (NULL_TREE, size_one_node, arglist);
+ arglist = tree_cons (NULL_TREE, string_arg, arglist);
+ fn = fn_fwrite;
+ break;
+ }
+ default:
+ gcc_unreachable ();
+ }
+
+ /* These optimizations are only performed when the result is ignored,
+ hence there's no need to cast the result to integer_type_node. */
+ return build_function_call_expr (fn, arglist);
}
-/* Returns true is EXP represents data that would potentially reside
- in a readonly section. */
+static void
+simplify_builtin_va_start (tree arglist)
+{
+ tree chain = TREE_CHAIN (arglist);
-static bool
-readonly_data_expr (tree exp)
+ if (TREE_CHAIN (chain))
+ error ("too many arguments to function `va_start'");
+
+ simplify_builtin_next_arg (chain);
+}
+
+static void
+simplify_builtin_next_arg (tree arglist)
{
- STRIP_NOPS (exp);
+ tree fntype = TREE_TYPE (current_function_decl);
- if (TREE_CODE (exp) == ADDR_EXPR)
- return decl_readonly_section (TREE_OPERAND (exp, 0), 0);
+ if (TYPE_ARG_TYPES (fntype) == 0
+ || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
+ == void_type_node))
+ error ("`va_start' used in function with fixed args");
+ else if (arglist)
+ {
+ tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
+ tree arg = TREE_VALUE (arglist);
+
+ /* Strip off all nops for the sake of the comparison. This
+ is not quite the same as STRIP_NOPS. It does more.
+ We must also strip off INDIRECT_EXPR for C++ reference
+ parameters. */
+ while (TREE_CODE (arg) == NOP_EXPR
+ || TREE_CODE (arg) == CONVERT_EXPR
+ || TREE_CODE (arg) == NON_LVALUE_EXPR
+ || TREE_CODE (arg) == INDIRECT_REF)
+ arg = TREE_OPERAND (arg, 0);
+ if (arg != last_parm)
+ warning ("second parameter of `va_start' not last named argument");
+ TREE_VALUE (arglist) = arg;
+ }
else
- return false;
+ /* Evidently an out of date version of <stdarg.h>; can't validate
+ va_start's second argument, but can still work as intended. */
+ warning ("`__builtin_next_arg' called without an argument");
+}
+
+
+/* Simplify a call to the sprintf builtin.
+
+ Return 0 if no simplification was possible, otherwise return the
+ simplified form of the call as a tree. If IGNORED is true, it means that
+ the caller does not use the returned value of the function. */
+
+static tree
+simplify_builtin_sprintf (tree arglist, int ignored)
+{
+ tree call, retval, dest, fmt;
+ const char *fmt_str = NULL;
+
+ /* Verify the required arguments in the original call. We deal with two
+ types of sprintf() calls: 'sprintf (str, fmt)' and
+ 'sprintf (dest, "%s", orig)'. */
+ if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE)
+ && !validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, POINTER_TYPE,
+ VOID_TYPE))
+ return NULL_TREE;
+
+ /* Get the destination string and the format specifier. */
+ dest = TREE_VALUE (arglist);
+ fmt = TREE_VALUE (TREE_CHAIN (arglist));
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
+
+ call = NULL_TREE;
+ retval = NULL_TREE;
+
+ /* If the format doesn't contain % args or %%, use strcpy. */
+ if (strchr (fmt_str, '%') == NULL)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+
+ if (!fn)
+ return NULL_TREE;
+
+ /* Convert sprintf (str, fmt) into strcpy (str, fmt) when
+ 'format' is known to contain no % formats. */
+ arglist = build_tree_list (NULL_TREE, fmt);
+ arglist = tree_cons (NULL_TREE, dest, arglist);
+ call = build_function_call_expr (fn, arglist);
+ if (!ignored)
+ retval = build_int_cst (NULL_TREE, strlen (fmt_str));
+ }
+
+ /* If the format is "%s", use strcpy if the result isn't used. */
+ else if (fmt_str && strcmp (fmt_str, "%s") == 0)
+ {
+ tree fn, orig;
+ fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+
+ if (!fn)
+ return NULL_TREE;
+
+ /* Convert sprintf (str1, "%s", str2) into strcpy (str1, str2). */
+ orig = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
+ arglist = build_tree_list (NULL_TREE, orig);
+ arglist = tree_cons (NULL_TREE, dest, arglist);
+ if (!ignored)
+ {
+ retval = c_strlen (orig, 1);
+ if (!retval || TREE_CODE (retval) != INTEGER_CST)
+ return NULL_TREE;
+ }
+ call = build_function_call_expr (fn, arglist);
+ }
+
+ if (call && retval)
+ {
+ retval = convert
+ (TREE_TYPE (TREE_TYPE (implicit_built_in_decls[BUILT_IN_SPRINTF])),
+ retval);
+ return build2 (COMPOUND_EXPR, TREE_TYPE (retval), call, retval);
+ }
+ else
+ return call;
}
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