#include "real.h"
#include "rtl.h"
#include "tree.h"
-#include "tree-gimple.h"
+#include "gimple.h"
#include "flags.h"
#include "regs.h"
#include "hard-reg-set.h"
static rtx expand_builtin_interclass_mathfn (tree, rtx, rtx);
static rtx expand_builtin_sincos (tree);
static rtx expand_builtin_cexpi (tree, rtx, rtx);
-static rtx expand_builtin_int_roundingfn (tree, rtx, rtx);
-static rtx expand_builtin_int_roundingfn_2 (tree, rtx, rtx);
+static rtx expand_builtin_int_roundingfn (tree, rtx);
+static rtx expand_builtin_int_roundingfn_2 (tree, rtx);
static rtx expand_builtin_args_info (tree);
static rtx expand_builtin_next_arg (void);
static rtx expand_builtin_va_start (tree);
enum built_in_function);
static void maybe_emit_chk_warning (tree, enum built_in_function);
static void maybe_emit_sprintf_chk_warning (tree, enum built_in_function);
+static void maybe_emit_free_warning (tree);
static tree fold_builtin_object_size (tree, tree);
static tree fold_builtin_strcat_chk (tree, tree, tree, tree);
static tree fold_builtin_strncat_chk (tree, tree, tree, tree, tree);
{
/* Now restore our arg pointer from the address at which it
was saved in our stack frame. */
- emit_move_insn (virtual_incoming_args_rtx,
+ emit_move_insn (crtl->args.internal_arg_pointer,
copy_to_reg (get_arg_pointer_save_area ()));
}
}
rtx fp, lab, stack, insn, last;
enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
+ /* DRAP is needed for stack realign if longjmp is expanded to current
+ function */
+ if (SUPPORTS_STACK_ALIGNMENT)
+ crtl->need_drap = true;
+
if (setjmp_alias_set == -1)
setjmp_alias_set = new_alias_set ();
if (JUMP_P (insn))
{
- REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
- REG_NOTES (insn));
+ add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
break;
}
else if (CALL_P (insn))
r_label = convert_memory_address (Pmode, r_label);
r_save_area = expand_normal (t_save_area);
r_save_area = convert_memory_address (Pmode, r_save_area);
+ /* Copy the address of the save location to a register just in case it was based
+ on the frame pointer. */
+ r_save_area = copy_to_reg (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)));
{
if (JUMP_P (insn))
{
- REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO,
- const0_rtx, REG_NOTES (insn));
+ add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
break;
}
else if (CALL_P (insn))
int regno, size, align, nelts;
enum machine_mode mode;
rtx reg, mem;
- rtx *savevec = alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx));
+ rtx *savevec = XALLOCAVEC (rtx, FIRST_PSEUDO_REGISTER);
size = nelts = 0;
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
}
/* Save the arg pointer to the block. */
- tem = copy_to_reg (virtual_incoming_args_rtx);
+ tem = copy_to_reg (crtl->args.internal_arg_pointer);
#ifdef STACK_GROWS_DOWNWARD
/* We need the pointer as the caller actually passed them to us, not
as we might have pretended they were passed. Make sure it's a valid
/* Allocate a block of memory onto the stack and copy the memory
arguments to the outgoing arguments address. */
allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT);
+
+ /* Set DRAP flag to true, even though allocate_dynamic_stack_space
+ may have already set current_function_calls_alloca to true.
+ current_function_calls_alloca won't be set if argsize is zero,
+ so we have to guarantee need_drap is true here. */
+ if (SUPPORTS_STACK_ALIGNMENT)
+ crtl->need_drap = true;
+
dest = virtual_outgoing_args_rtx;
#ifndef STACK_GROWS_DOWNWARD
if (GET_CODE (argsize) == CONST_INT)
before_call = get_last_insn ();
- target = expand_call (exp, target, target == const0_rtx);
-
- /* If this is a sqrt operation and we don't care about errno, try to
- attach a REG_EQUAL note with a SQRT rtx to the emitted libcall.
- This allows the semantics of the libcall to be visible to the RTL
- optimizers. */
- if (builtin_optab == sqrt_optab && !errno_set)
- {
- /* Search backwards through the insns emitted by expand_call looking
- for the instruction with the REG_RETVAL note. */
- rtx last = get_last_insn ();
- while (last != before_call)
- {
- if (find_reg_note (last, REG_RETVAL, NULL))
- {
- rtx note = find_reg_note (last, REG_EQUAL, NULL);
- /* Check that the REQ_EQUAL note is an EXPR_LIST with
- two elements, i.e. symbol_ref(sqrt) and the operand. */
- if (note
- && GET_CODE (note) == EXPR_LIST
- && GET_CODE (XEXP (note, 0)) == EXPR_LIST
- && XEXP (XEXP (note, 0), 1) != NULL_RTX
- && XEXP (XEXP (XEXP (note, 0), 1), 1) == NULL_RTX)
- {
- rtx operand = XEXP (XEXP (XEXP (note, 0), 1), 0);
- /* Check operand is a register with expected mode. */
- if (operand
- && REG_P (operand)
- && GET_MODE (operand) == mode)
- {
- /* Replace the REG_EQUAL note with a SQRT rtx. */
- rtx equiv = gen_rtx_SQRT (mode, operand);
- set_unique_reg_note (last, REG_EQUAL, equiv);
- }
- }
- break;
- }
- last = PREV_INSN (last);
- }
- }
-
- return target;
+ return expand_call (exp, target, target == const0_rtx);
}
/* Expand a call to the builtin binary math functions (pow and atan2).
do not need to worry about setting errno to EDOM.
If expanding via optab fails, lower expression to (int)(floor(x)).
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. */
+ if convenient, the result should be placed in TARGET. */
static rtx
-expand_builtin_int_roundingfn (tree exp, rtx target, rtx subtarget)
+expand_builtin_int_roundingfn (tree exp, rtx target)
{
convert_optab builtin_optab;
rtx op0, insns, tmp;
side-effects more the once. */
CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+ op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
start_sequence ();
conversion (lrint).
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. */
+ function; if convenient, the result should be placed in TARGET. */
static rtx
-expand_builtin_int_roundingfn_2 (tree exp, rtx target, rtx subtarget)
+expand_builtin_int_roundingfn_2 (tree exp, rtx target)
{
convert_optab builtin_optab;
rtx op0, insns;
side-effects more the once. */
CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+ op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
start_sequence ();
if (real_identical (&c, &cint)
&& ((n >= -1 && n <= 2)
|| (flag_unsafe_math_optimizations
- && !optimize_size
+ && optimize_insn_for_speed_p ()
&& powi_cost (n) <= POWI_MAX_MULTS)))
{
op = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
if (real_identical (&c2, &cint)
&& ((flag_unsafe_math_optimizations
- && !optimize_size
+ && optimize_insn_for_speed_p ()
&& powi_cost (n/2) <= POWI_MAX_MULTS)
|| n == 1))
{
real_arithmetic (&c2, RDIV_EXPR, &cint, &dconst3);
real_convert (&c2, mode, &c2);
if (real_identical (&c2, &c)
- && ((!optimize_size
+ && ((optimize_insn_for_speed_p ()
&& powi_cost (n/3) <= POWI_MAX_MULTS)
|| n == 1))
{
if ((TREE_INT_CST_HIGH (arg1) == 0
|| TREE_INT_CST_HIGH (arg1) == -1)
&& ((n >= -1 && n <= 2)
- || (! optimize_size
+ || (optimize_insn_for_speed_p ()
&& powi_cost (n) <= POWI_MAX_MULTS)))
{
op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
false, /*endp=*/0);
HOST_WIDE_INT expected_size = -1;
unsigned int expected_align = 0;
+ tree_ann_common_t ann;
if (result)
{
if (src_align == 0)
return NULL_RTX;
- stringop_block_profile (exp, &expected_align, &expected_size);
+ ann = tree_common_ann (exp);
+ if (ann)
+ stringop_block_profile (ann->stmt, &expected_align, &expected_size);
+
if (expected_align < dest_align)
expected_align = dest_align;
dest_mem = get_memory_rtx (dest, len);
&& GET_CODE (len_rtx) == CONST_INT
&& (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
&& can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
- (void *) src_str, dest_align, false))
+ CONST_CAST (char *, src_str),
+ dest_align, false))
{
dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
builtin_memcpy_read_str,
- (void *) src_str, dest_align, false, 0);
+ CONST_CAST (char *, src_str),
+ dest_align, false, 0);
dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
dest_mem = convert_memory_address (ptr_mode, dest_mem);
return dest_mem;
&& GET_CODE (len_rtx) == CONST_INT
&& (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
&& can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
- (void *) src_str, dest_align, false))
+ CONST_CAST (char *, src_str),
+ dest_align, false))
{
dest_mem = get_memory_rtx (dest, len);
set_mem_align (dest_mem, dest_align);
dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
builtin_memcpy_read_str,
- (void *) src_str, dest_align,
- false, endp);
+ CONST_CAST (char *, src_str),
+ dest_align, false, endp);
dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
dest_mem = convert_memory_address (ptr_mode, dest_mem);
return dest_mem;
if (!p || dest_align == 0 || !host_integerp (len, 1)
|| !can_store_by_pieces (tree_low_cst (len, 1),
builtin_strncpy_read_str,
- (void *) p, dest_align, false))
+ CONST_CAST (char *, p),
+ dest_align, false))
return NULL_RTX;
dest_mem = get_memory_rtx (dest, len);
store_by_pieces (dest_mem, tree_low_cst (len, 1),
builtin_strncpy_read_str,
- (void *) p, dest_align, false, 0);
+ CONST_CAST (char *, p), dest_align, false, 0);
dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
dest_mem = convert_memory_address (ptr_mode, dest_mem);
return dest_mem;
enum machine_mode mode)
{
const char *c = (const char *) data;
- char *p = alloca (GET_MODE_SIZE (mode));
+ char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
memset (p, *c, GET_MODE_SIZE (mode));
if (size == 1)
return (rtx) data;
- p = alloca (size);
+ p = XALLOCAVEC (char, size);
memset (p, 1, size);
coeff = c_readstr (p, mode);
rtx dest_mem, dest_addr, len_rtx;
HOST_WIDE_INT expected_size = -1;
unsigned int expected_align = 0;
+ tree_ann_common_t ann;
dest_align = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
if (dest_align == 0)
return NULL_RTX;
- stringop_block_profile (orig_exp, &expected_align, &expected_size);
+ ann = tree_common_ann (orig_exp);
+ if (ann)
+ stringop_block_profile (ann->stmt, &expected_align, &expected_size);
+
if (expected_align < dest_align)
expected_align = dest_align;
if (p && *p == '\0')
return expand_expr (dst, target, mode, EXPAND_NORMAL);
- if (!optimize_size)
+ if (optimize_insn_for_speed_p ())
{
/* See if we can store by pieces into (dst + strlen(dst)). */
tree newsrc, newdst,
static tree
stabilize_va_list (tree valist, int needs_lvalue)
{
- if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
+ tree vatype = targetm.canonical_va_list_type (TREE_TYPE (valist));
+
+ gcc_assert (vatype != NULL_TREE);
+
+ if (TREE_CODE (vatype) == ARRAY_TYPE)
{
if (TREE_SIDE_EFFECTS (valist))
valist = save_expr (valist);
/* 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).
+ vatype, but it's possible we've actually been given an array
+ (an actual TARGET_CANONICAL_VA_LIST_TYPE (valist)).
So fix it. */
if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
{
- tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
+ tree p1 = build_pointer_type (TREE_TYPE (vatype));
valist = build_fold_addr_expr_with_type (valist, p1);
}
}
if (! TREE_SIDE_EFFECTS (valist))
return valist;
- pt = build_pointer_type (va_list_type_node);
+ pt = build_pointer_type (vatype);
valist = fold_build1 (ADDR_EXPR, pt, valist);
TREE_SIDE_EFFECTS (valist) = 1;
}
return ptr_type_node;
}
+/* The "standard" abi va_list is va_list_type_node. */
+
+tree
+std_fn_abi_va_list (tree fndecl ATTRIBUTE_UNUSED)
+{
+ return va_list_type_node;
+}
+
+/* The "standard" type of va_list is va_list_type_node. */
+
+tree
+std_canonical_va_list_type (tree type)
+{
+ tree wtype, htype;
+
+ if (INDIRECT_REF_P (type))
+ type = TREE_TYPE (type);
+ else if (POINTER_TYPE_P (type) && POINTER_TYPE_P (TREE_TYPE(type)))
+ type = TREE_TYPE (type);
+ wtype = va_list_type_node;
+ htype = type;
+ /* Treat structure va_list types. */
+ if (TREE_CODE (wtype) == RECORD_TYPE && POINTER_TYPE_P (htype))
+ htype = TREE_TYPE (htype);
+ else if (TREE_CODE (wtype) == ARRAY_TYPE)
+ {
+ /* If va_list is an array type, the argument may have decayed
+ to a pointer type, e.g. by being passed to another function.
+ In that case, unwrap both types so that we can compare the
+ underlying records. */
+ if (TREE_CODE (htype) == ARRAY_TYPE
+ || POINTER_TYPE_P (htype))
+ {
+ wtype = TREE_TYPE (wtype);
+ htype = TREE_TYPE (htype);
+ }
+ }
+ if (TYPE_MAIN_VARIANT (wtype) == TYPE_MAIN_VARIANT (htype))
+ return va_list_type_node;
+
+ return NULL_TREE;
+}
+
/* The "standard" implementation of va_start: just assign `nextarg' to
the variable. */
current (padded) address and increment by the (padded) size. */
tree
-std_gimplify_va_arg_expr (tree valist, tree type, tree *pre_p, tree *post_p)
+std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
+ gimple_seq *post_p)
{
tree addr, t, type_size, rounded_size, valist_tmp;
unsigned HOST_WIDE_INT align, boundary;
type = build_pointer_type (type);
align = PARM_BOUNDARY / BITS_PER_UNIT;
- boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type) / BITS_PER_UNIT;
+ boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type);
+
+ /* When we align parameter on stack for caller, if the parameter
+ alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
+ aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
+ here with caller. */
+ if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT)
+ boundary = MAX_SUPPORTED_STACK_ALIGNMENT;
+
+ boundary /= BITS_PER_UNIT;
/* Hoist the valist value into a temporary for the moment. */
valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL);
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)
+gimplify_va_arg_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
- tree promoted_type, want_va_type, have_va_type;
+ tree promoted_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;
+ have_va_type = targetm.canonical_va_list_type (have_va_type);
- if (TREE_CODE (want_va_type) == ARRAY_TYPE)
- {
- /* If va_list is an array type, the argument may have decayed
- to a pointer type, e.g. by being passed to another function.
- In that case, unwrap both types so that we can compare the
- underlying records. */
- if (TREE_CODE (have_va_type) == ARRAY_TYPE
- || POINTER_TYPE_P (have_va_type))
- {
- want_va_type = TREE_TYPE (want_va_type);
- have_va_type = TREE_TYPE (have_va_type);
- }
- }
-
- if (TYPE_MAIN_VARIANT (want_va_type) != TYPE_MAIN_VARIANT (have_va_type))
+ if (have_va_type == NULL_TREE)
{
error ("first argument to %<va_arg%> not of type %<va_list%>");
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))
+ if ((promoted_type = lang_hooks.types.type_promotes_to (type))
!= type)
{
static bool gave_help;
+ bool warned;
/* 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 (0, "%qT is promoted to %qT when passed through %<...%>",
- type, promoted_type);
- if (! gave_help)
+ warned = warning (0, "%qT is promoted to %qT when passed through %<...%>",
+ type, promoted_type);
+ if (!gave_help && warned)
{
gave_help = true;
- inform ("(so you should pass %qT not %qT to %<va_arg%>)",
+ inform (input_location, "(so you should pass %qT not %qT 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");
+ if (warned)
+ inform (input_location, "if this code is reached, the program will abort");
t = build_call_expr (implicit_built_in_decls[BUILT_IN_TRAP], 0);
- append_to_statement_list (t, pre_p);
+ gimplify_and_add (t, pre_p);
/* This is dead code, but go ahead and finish so that the
mode of the result comes out right. */
{
/* Make it easier for the backends by protecting the valist argument
from multiple evaluations. */
- if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
+ if (TREE_CODE (have_va_type) == 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).
+ TREE_TYPE (abi), but it's possible we've
+ actually been given an array (an actual TARGET_FN_ABI_VA_LIST).
So fix it. */
if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
{
- tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
+ tree p1 = build_pointer_type (TREE_TYPE (have_va_type));
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);
if (!targetm.gimplify_va_arg_expr)
- /* FIXME:Once most targets are converted we should merely
+ /* FIXME: Once most targets are converted we should merely
assert this is non-null. */
return GS_ALL_DONE;
dst = stabilize_va_list (dst, 1);
src = stabilize_va_list (src, 0);
- if (TREE_CODE (va_list_type_node) != ARRAY_TYPE)
+ gcc_assert (cfun != NULL && cfun->decl != NULL_TREE);
+
+ if (TREE_CODE (targetm.fn_abi_va_list (cfun->decl)) != ARRAY_TYPE)
{
- t = build2 (MODIFY_EXPR, va_list_type_node, dst, src);
+ t = build2 (MODIFY_EXPR, targetm.fn_abi_va_list (cfun->decl), dst, src);
TREE_SIDE_EFFECTS (t) = 1;
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
}
/* Evaluate to pointers. */
dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL);
srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL);
- size = expand_expr (TYPE_SIZE_UNIT (va_list_type_node), NULL_RTX,
- VOIDmode, EXPAND_NORMAL);
+ size = expand_expr (TYPE_SIZE_UNIT (targetm.fn_abi_va_list (cfun->decl)),
+ NULL_RTX, VOIDmode, EXPAND_NORMAL);
dstb = convert_memory_address (Pmode, dstb);
srcb = convert_memory_address (Pmode, srcb);
/* "Dereference" to BLKmode memories. */
dstb = gen_rtx_MEM (BLKmode, dstb);
set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst))));
- set_mem_align (dstb, TYPE_ALIGN (va_list_type_node));
+ set_mem_align (dstb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl)));
srcb = gen_rtx_MEM (BLKmode, srcb);
set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src))));
- set_mem_align (srcb, TYPE_ALIGN (va_list_type_node));
+ set_mem_align (srcb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl)));
/* Copy. */
emit_block_move (dstb, srcb, size, BLOCK_OP_NORMAL);
{
/* Create a NUL-terminated string that's one char shorter
than the original, stripping off the trailing '\n'. */
- char *newstr = alloca (len);
+ char *newstr = XALLOCAVEC (char, len);
memcpy (newstr, fmt_str, len - 1);
newstr[len - 1] = 0;
arg = build_string_literal (len, newstr);
static rtx
expand_builtin_profile_func (bool exitp)
{
- rtx this, which;
+ rtx this_rtx, which;
- this = DECL_RTL (current_function_decl);
- gcc_assert (MEM_P (this));
- this = XEXP (this, 0);
+ this_rtx = DECL_RTL (current_function_decl);
+ gcc_assert (MEM_P (this_rtx));
+ this_rtx = XEXP (this_rtx, 0);
if (exitp)
which = profile_function_exit_libfunc;
else
which = profile_function_entry_libfunc;
- emit_library_call (which, LCT_NORMAL, VOIDmode, 2, this, Pmode,
+ emit_library_call (which, LCT_NORMAL, VOIDmode, 2, this_rtx, Pmode,
expand_builtin_return_addr (BUILT_IN_RETURN_ADDRESS,
0),
Pmode);
}
#endif
+ if (synchronize_libfunc != NULL_RTX)
+ {
+ emit_library_call (synchronize_libfunc, LCT_NORMAL, VOIDmode, 0);
+ return;
+ }
+
/* If no explicit memory barrier instruction is available, create an
empty asm stmt with a memory clobber. */
x = build4 (ASM_EXPR, void_type_node, build_string (0, ""), NULL, NULL,
if (!optimize
&& !called_as_built_in (fndecl)
&& DECL_ASSEMBLER_NAME_SET_P (fndecl)
- && fcode != BUILT_IN_ALLOCA)
+ && fcode != BUILT_IN_ALLOCA
+ && fcode != BUILT_IN_FREE)
return expand_call (exp, target, ignore);
/* The built-in function expanders test for target == const0_rtx
CASE_FLT_FN (BUILT_IN_LLCEIL):
CASE_FLT_FN (BUILT_IN_LFLOOR):
CASE_FLT_FN (BUILT_IN_LLFLOOR):
- target = expand_builtin_int_roundingfn (exp, target, subtarget);
+ target = expand_builtin_int_roundingfn (exp, target);
if (target)
return target;
break;
CASE_FLT_FN (BUILT_IN_LLRINT):
CASE_FLT_FN (BUILT_IN_LROUND):
CASE_FLT_FN (BUILT_IN_LLROUND):
- target = expand_builtin_int_roundingfn_2 (exp, target, subtarget);
+ target = expand_builtin_int_roundingfn_2 (exp, target);
if (target)
return target;
break;
maybe_emit_sprintf_chk_warning (exp, fcode);
break;
+ case BUILT_IN_FREE:
+ maybe_emit_free_warning (exp);
+ break;
+
default: /* just do library call, if unknown builtin */
break;
}
Thus we pedwarn to ensure this constraint violation is
diagnosed. */
if (!MODE_HAS_INFINITIES (TYPE_MODE (type)) && warn)
- pedwarn ("target format does not support infinity");
+ pedwarn (input_location, 0, "target format does not support infinity");
real_inf (&real);
return build_real (type, real);
case COMPOUND_EXPR:
case MODIFY_EXPR:
case BIND_EXPR:
- return integer_valued_real_p (GENERIC_TREE_OPERAND (t, 1));
+ return integer_valued_real_p (TREE_OPERAND (t, 1));
case PLUS_EXPR:
case MINUS_EXPR:
&& operand_equal_p (real, imag, OEP_PURE_SAME))
{
const REAL_VALUE_TYPE sqrt2_trunc
- = real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_sqrt2));
+ = real_value_truncate (TYPE_MODE (type), dconst_sqrt2 ());
STRIP_NOPS (real);
return fold_build2 (MULT_EXPR, type,
fold_build1 (ABS_EXPR, type, real),
/* Don't do this when optimizing for size. */
if (flag_unsafe_math_optimizations
- && optimize && !optimize_size)
+ && optimize && optimize_function_for_speed_p (cfun))
{
tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
tree tree_root;
/* The inner root was either sqrt or cbrt. */
REAL_VALUE_TYPE dconstroot =
- BUILTIN_SQRT_P (fcode) ? dconsthalf : *get_real_const (rv_third);
+ BUILTIN_SQRT_P (fcode) ? dconsthalf : dconst_third ();
/* Adjust for the outer root. */
SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
{
tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
const REAL_VALUE_TYPE third_trunc =
- real_value_truncate (TYPE_MODE (type), *get_real_const (rv_third));
+ real_value_truncate (TYPE_MODE (type), dconst_third ());
arg = fold_build2 (MULT_EXPR, type,
CALL_EXPR_ARG (arg, 0),
build_real (type, third_trunc));
{
tree arg0 = CALL_EXPR_ARG (arg, 0);
tree tree_root;
- REAL_VALUE_TYPE dconstroot = *get_real_const (rv_third);
+ REAL_VALUE_TYPE dconstroot = dconst_third ();
SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
REAL_VALUE_TYPE dconstroot;
real_arithmetic (&dconstroot, MULT_EXPR,
- get_real_const (rv_third),
- get_real_const (rv_third));
+ dconst_third_ptr (), dconst_third_ptr ());
dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
tree_root = build_real (type, dconstroot);
return build_call_expr (powfn, 2, arg0, tree_root);
{
tree powfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
const REAL_VALUE_TYPE dconstroot
- = real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_third));
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
tree narg01 = fold_build2 (MULT_EXPR, type, arg01,
build_real (type, dconstroot));
return build_call_expr (powfn, 2, arg00, narg01);
if (flag_unsafe_math_optimizations && func == mpfr_log)
{
const REAL_VALUE_TYPE e_truncated =
- real_value_truncate (TYPE_MODE (type), *get_real_const (rv_e));
+ real_value_truncate (TYPE_MODE (type), dconst_e ());
if (real_dconstp (arg, &e_truncated))
return build_real (type, dconst1);
}
{
CASE_FLT_FN (BUILT_IN_EXP):
/* Prepare to do logN(exp(exponent) -> exponent*logN(e). */
- x = build_real (type,
- real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_e)));
+ x = build_real (type, real_value_truncate (TYPE_MODE (type),
+ dconst_e ()));
exponent = CALL_EXPR_ARG (arg, 0);
break;
CASE_FLT_FN (BUILT_IN_EXP2):
/* Prepare to do logN(cbrt(x) -> (1/3)*logN(x). */
x = CALL_EXPR_ARG (arg, 0);
exponent = build_real (type, real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_third)));
+ dconst_third ()));
break;
CASE_FLT_FN (BUILT_IN_POW):
/* Prepare to do logN(pow(x,exponent) -> exponent*logN(x). */
&& operand_equal_p (arg0, arg1, OEP_PURE_SAME))
{
const REAL_VALUE_TYPE sqrt2_trunc
- = real_value_truncate (TYPE_MODE (type), *get_real_const (rv_sqrt2));
+ = real_value_truncate (TYPE_MODE (type), dconst_sqrt2 ());
return fold_build2 (MULT_EXPR, type,
fold_build1 (ABS_EXPR, type, arg0),
build_real (type, sqrt2_trunc));
if (flag_unsafe_math_optimizations)
{
const REAL_VALUE_TYPE dconstroot
- = real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_third));
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
if (REAL_VALUES_EQUAL (c, dconstroot))
{
if (tree_expr_nonnegative_p (arg))
{
const REAL_VALUE_TYPE dconstroot
- = real_value_truncate (TYPE_MODE (type),
- *get_real_const (rv_third));
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
tree narg1 = fold_build2 (MULT_EXPR, type, arg1,
build_real (type, dconstroot));
return build_call_expr (fndecl, 2, arg, narg1);
if (operand_equal_p (src, dest, 0))
return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), dest);
- if (optimize_size)
+ if (optimize_function_for_size_p (cfun))
return NULL_TREE;
fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
if (target_char_cast (arg2, &c))
return NULL_TREE;
- r = memchr (p1, c, tree_low_cst (len, 1));
+ r = (char *) memchr (p1, c, tree_low_cst (len, 1));
if (r == NULL)
return build_int_cst (TREE_TYPE (arg1), 0);
}
if (ret)
{
- ret = build1 (NOP_EXPR, GENERIC_TREE_TYPE (ret), ret);
+ ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
TREE_NO_WARNING (ret) = 1;
return ret;
}
int i, j;
va_list ap;
- buffer = alloca (nargs * sizeof (tree));
+ buffer = XALLOCAVEC (tree, nargs);
va_start (ap, n);
for (i = 0; i < n; i++)
buffer[i] = va_arg (ap, tree);
/* This function validates the types of a function call argument list
against a specified list of tree_codes. If the last specifier is a 0,
that represents an ellipses, otherwise the last specifier must be a
+ VOID_TYPE.
+
+ This is the GIMPLE version of validate_arglist. Eventually we want to
+ completely convert builtins.c to work from GIMPLEs and the tree based
+ validate_arglist will then be removed. */
+
+bool
+validate_gimple_arglist (const_gimple call, ...)
+{
+ enum tree_code code;
+ bool res = 0;
+ va_list ap;
+ const_tree arg;
+ size_t i;
+
+ va_start (ap, call);
+ i = 0;
+
+ do
+ {
+ code = va_arg (ap, enum tree_code);
+ switch (code)
+ {
+ case 0:
+ /* This signifies an ellipses, any further arguments are all ok. */
+ res = true;
+ goto end;
+ case VOID_TYPE:
+ /* This signifies an endlink, if no arguments remain, return
+ true, otherwise return false. */
+ res = (i == gimple_call_num_args (call));
+ goto end;
+ default:
+ /* If no parameters remain or the parameter's code does not
+ match the specified code, return false. Otherwise continue
+ checking any remaining arguments. */
+ arg = gimple_call_arg (call, i++);
+ if (!validate_arg (arg, code))
+ goto end;
+ break;
+ }
+ }
+ while (1);
+
+ /* We need gotos here since we can only have one VA_CLOSE in a
+ function. */
+ end: ;
+ va_end (ap);
+
+ return res;
+}
+
+/* This function validates the types of a function call argument list
+ against a specified list of tree_codes. If the last specifier is a 0,
+ that represents an ellipses, otherwise the last specifier must be a
VOID_TYPE. */
bool
case 1: /* length is greater than 1, call fwrite. */
{
/* If optimizing for size keep fputs. */
- if (optimize_size)
+ if (optimize_function_for_size_p (cfun))
return NULL_TREE;
/* New argument list transforming fputs(string, stream) to
fwrite(string, 1, len, stream). */
/* Fold the next_arg or va_start call EXP. Returns true if there was an error
produced. False otherwise. This is done so that we don't output the error
or warning twice or three times. */
+
bool
fold_builtin_next_arg (tree exp, bool va_start_p)
{
it. */
warning (0, "second parameter of %<va_start%> not last named argument");
}
+
+ /* Undefined by C99 7.15.1.4p4 (va_start):
+ "If the parameter parmN is declared with the register storage
+ class, with a function or array type, or with a type that is
+ not compatible with the type that results after application of
+ the default argument promotions, the behavior is undefined."
+ */
+ else if (DECL_REGISTER (arg))
+ warning (0, "undefined behaviour when second parameter of "
+ "%<va_start%> is declared with %<register%> storage");
+
/* We want to verify the second parameter just once before the tree
optimizers are run and then avoid keeping it in the tree,
as otherwise we could warn even for correct code like:
}
}
+/* Emit warning if a free is called with address of a variable. */
+
+static void
+maybe_emit_free_warning (tree exp)
+{
+ tree arg = CALL_EXPR_ARG (exp, 0);
+
+ STRIP_NOPS (arg);
+ if (TREE_CODE (arg) != ADDR_EXPR)
+ return;
+
+ arg = get_base_address (TREE_OPERAND (arg, 0));
+ if (arg == NULL || INDIRECT_REF_P (arg))
+ return;
+
+ if (SSA_VAR_P (arg))
+ warning (0, "%Kattempt to free a non-heap object %qD", exp, arg);
+ else
+ warning (0, "%Kattempt to free a non-heap object", exp);
+}
+
/* Fold a call to __builtin_object_size with arguments PTR and OST,
if possible. */
{
/* Create a NUL-terminated string that's one char shorter
than the original, stripping off the trailing '\n'. */
- char *newstr = alloca (len);
+ char *newstr = XALLOCAVEC (char, len);
memcpy (newstr, str, len - 1);
newstr[len - 1] = 0;
&& (!min || real_compare (inclusive ? GE_EXPR: GT_EXPR , ra, min))
&& (!max || real_compare (inclusive ? LE_EXPR: LT_EXPR , ra, max)))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
int inexact;
mpfr_t m;
mpfr_init2 (m, prec);
mpfr_from_real (m, ra, GMP_RNDN);
mpfr_clear_flags ();
- inexact = func (m, m, GMP_RNDN);
+ inexact = func (m, m, rnd);
result = do_mpfr_ckconv (m, type, inexact);
mpfr_clear (m);
}
if (real_isfinite (ra1) && real_isfinite (ra2))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
int inexact;
mpfr_t m1, m2;
mpfr_from_real (m1, ra1, GMP_RNDN);
mpfr_from_real (m2, ra2, GMP_RNDN);
mpfr_clear_flags ();
- inexact = func (m1, m1, m2, GMP_RNDN);
+ inexact = func (m1, m1, m2, rnd);
result = do_mpfr_ckconv (m1, type, inexact);
mpfr_clears (m1, m2, NULL);
}
if (real_isfinite (ra1) && real_isfinite (ra2) && real_isfinite (ra3))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
int inexact;
mpfr_t m1, m2, m3;
mpfr_from_real (m2, ra2, GMP_RNDN);
mpfr_from_real (m3, ra3, GMP_RNDN);
mpfr_clear_flags ();
- inexact = func (m1, m1, m2, m3, GMP_RNDN);
+ inexact = func (m1, m1, m2, m3, rnd);
result = do_mpfr_ckconv (m1, type, inexact);
mpfr_clears (m1, m2, m3, NULL);
}
if (real_isfinite (ra))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
tree result_s, result_c;
int inexact;
mpfr_t m, ms, mc;
mpfr_inits2 (prec, m, ms, mc, NULL);
mpfr_from_real (m, ra, GMP_RNDN);
mpfr_clear_flags ();
- inexact = mpfr_sin_cos (ms, mc, m, GMP_RNDN);
+ inexact = mpfr_sin_cos (ms, mc, m, rnd);
result_s = do_mpfr_ckconv (ms, type, inexact);
result_c = do_mpfr_ckconv (mc, type, inexact);
mpfr_clears (m, ms, mc, NULL);
&& real_isfinite (ra)
&& (!min || real_compare (inclusive ? GE_EXPR: GT_EXPR , ra, min)))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
int inexact;
mpfr_t m;
mpfr_init2 (m, prec);
mpfr_from_real (m, ra, GMP_RNDN);
mpfr_clear_flags ();
- inexact = func (m, n, m, GMP_RNDN);
+ inexact = func (m, n, m, rnd);
result = do_mpfr_ckconv (m, type, inexact);
mpfr_clear (m);
}
if (real_isfinite (ra0) && real_isfinite (ra1))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
tree result_rem;
long integer_quo;
mpfr_t m0, m1;
mpfr_from_real (m0, ra0, GMP_RNDN);
mpfr_from_real (m1, ra1, GMP_RNDN);
mpfr_clear_flags ();
- mpfr_remquo (m0, &integer_quo, m0, m1, GMP_RNDN);
+ mpfr_remquo (m0, &integer_quo, m0, m1, rnd);
/* Remquo is independent of the rounding mode, so pass
inexact=0 to do_mpfr_ckconv(). */
result_rem = do_mpfr_ckconv (m0, type, /*inexact=*/ 0);
&& ra->cl != rvc_zero
&& !(real_isneg(ra) && real_isinteger(ra, TYPE_MODE (type))))
{
- const int prec = REAL_MODE_FORMAT (TYPE_MODE (type))->p;
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
int inexact, sg;
mpfr_t m;
tree result_lg;
mpfr_init2 (m, prec);
mpfr_from_real (m, ra, GMP_RNDN);
mpfr_clear_flags ();
- inexact = mpfr_lgamma (m, &sg, m, GMP_RNDN);
+ inexact = mpfr_lgamma (m, &sg, m, rnd);
result_lg = do_mpfr_ckconv (m, type, inexact);
mpfr_clear (m);
if (result_lg)
return result;
}
#endif
+
+/* FIXME tuples.
+ The functions below provide an alternate interface for folding
+ builtin function calls presented as GIMPLE_CALL statements rather
+ than as CALL_EXPRs. The folded result is still expressed as a
+ tree. There is too much code duplication in the handling of
+ varargs functions, and a more intrusive re-factoring would permit
+ better sharing of code between the tree and statement-based
+ versions of these functions. */
+
+/* Construct a new CALL_EXPR using the tail of the argument list of STMT
+ along with N new arguments specified as the "..." parameters. SKIP
+ is the number of arguments in STMT to be omitted. This function is used
+ to do varargs-to-varargs transformations. */
+
+static tree
+gimple_rewrite_call_expr (gimple stmt, int skip, tree fndecl, int n, ...)
+{
+ int oldnargs = gimple_call_num_args (stmt);
+ int nargs = oldnargs - skip + n;
+ tree fntype = TREE_TYPE (fndecl);
+ tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
+ tree *buffer;
+ int i, j;
+ va_list ap;
+
+ buffer = XALLOCAVEC (tree, nargs);
+ va_start (ap, n);
+ for (i = 0; i < n; i++)
+ buffer[i] = va_arg (ap, tree);
+ va_end (ap);
+ for (j = skip; j < oldnargs; j++, i++)
+ buffer[i] = gimple_call_arg (stmt, j);
+
+ return fold (build_call_array (TREE_TYPE (fntype), fn, nargs, buffer));
+}
+
+/* Fold a call STMT to __{,v}sprintf_chk. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SPRINTF_CHK or BUILT_IN_VSPRINTF_CHK. */
+
+static tree
+gimple_fold_builtin_sprintf_chk (gimple stmt, enum built_in_function fcode)
+{
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+ int nargs = gimple_call_num_args (stmt);
+
+ /* Verify the required arguments in the original call. */
+ if (nargs < 4)
+ return NULL_TREE;
+ dest = gimple_call_arg (stmt, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ flag = gimple_call_arg (stmt, 1);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = gimple_call_arg (stmt, 2);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = gimple_call_arg (stmt, 3);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ len = NULL_TREE;
+
+ if (!init_target_chars ())
+ return NULL_TREE;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str != NULL)
+ {
+ /* If the format doesn't contain % args or %%, we know the size. */
+ if (strchr (fmt_str, target_percent) == 0)
+ {
+ if (fcode != BUILT_IN_SPRINTF_CHK || nargs == 4)
+ len = build_int_cstu (size_type_node, strlen (fmt_str));
+ }
+ /* If the format is "%s" and first ... argument is a string literal,
+ we know the size too. */
+ else if (fcode == BUILT_IN_SPRINTF_CHK
+ && strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree arg;
+
+ if (nargs == 5)
+ {
+ arg = gimple_call_arg (stmt, 4);
+ if (validate_arg (arg, POINTER_TYPE))
+ {
+ len = c_strlen (arg, 1);
+ if (! len || ! host_integerp (len, 1))
+ len = NULL_TREE;
+ }
+ }
+ }
+ }
+
+ if (! integer_all_onesp (size))
+ {
+ if (! len || ! tree_int_cst_lt (len, size))
+ return NULL_TREE;
+ }
+
+ /* Only convert __{,v}sprintf_chk to {,v}sprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
+ {
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
+ }
+
+ /* If __builtin_{,v}sprintf_chk is used, assume {,v}sprintf is available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSPRINTF_CHK
+ ? BUILT_IN_VSPRINTF : BUILT_IN_SPRINTF];
+ if (!fn)
+ return NULL_TREE;
+
+ return gimple_rewrite_call_expr (stmt, 4, fn, 2, dest, fmt);
+}
+
+/* Fold a call STMT to {,v}snprintf. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SNPRINTF_CHK or
+ BUILT_IN_VSNPRINTF_CHK. If MAXLEN is not NULL, it is maximum length
+ passed as second argument. */
+
+tree
+gimple_fold_builtin_snprintf_chk (gimple stmt, tree maxlen,
+ enum built_in_function fcode)
+{
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+
+ /* Verify the required arguments in the original call. */
+ if (gimple_call_num_args (stmt) < 5)
+ return NULL_TREE;
+ dest = gimple_call_arg (stmt, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ len = gimple_call_arg (stmt, 1);
+ if (!validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ flag = gimple_call_arg (stmt, 2);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = gimple_call_arg (stmt, 3);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = gimple_call_arg (stmt, 4);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ if (! host_integerp (len, 1))
+ {
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ return NULL_TREE;
+ }
+ else
+ maxlen = len;
+
+ if (tree_int_cst_lt (size, maxlen))
+ return NULL_TREE;
+ }
+
+ if (!init_target_chars ())
+ return NULL_TREE;
+
+ /* Only convert __{,v}snprintf_chk to {,v}snprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
+ {
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
+ }
+
+ /* If __builtin_{,v}snprintf_chk is used, assume {,v}snprintf is
+ available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSNPRINTF_CHK
+ ? BUILT_IN_VSNPRINTF : BUILT_IN_SNPRINTF];
+ if (!fn)
+ return NULL_TREE;
+
+ return gimple_rewrite_call_expr (stmt, 5, fn, 3, dest, len, fmt);
+}
+
+/* Builtins with folding operations that operate on "..." arguments
+ need special handling; we need to store the arguments in a convenient
+ data structure before attempting any folding. Fortunately there are
+ only a few builtins that fall into this category. FNDECL is the
+ function, EXP is the CALL_EXPR for the call, and IGNORE is true if the
+ result of the function call is ignored. */
+
+static tree
+gimple_fold_builtin_varargs (tree fndecl, gimple stmt, bool ignore ATTRIBUTE_UNUSED)
+{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree ret = NULL_TREE;
+
+ switch (fcode)
+ {
+ case BUILT_IN_SPRINTF_CHK:
+ case BUILT_IN_VSPRINTF_CHK:
+ ret = gimple_fold_builtin_sprintf_chk (stmt, fcode);
+ break;
+
+ case BUILT_IN_SNPRINTF_CHK:
+ case BUILT_IN_VSNPRINTF_CHK:
+ ret = gimple_fold_builtin_snprintf_chk (stmt, NULL_TREE, fcode);
+
+ default:
+ break;
+ }
+ if (ret)
+ {
+ ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
+ TREE_NO_WARNING (ret) = 1;
+ return ret;
+ }
+ return NULL_TREE;
+}
+
+/* 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_call_stmt (gimple stmt, bool ignore)
+{
+ tree ret = NULL_TREE;
+ tree fndecl = gimple_call_fndecl (stmt);
+ if (fndecl
+ && TREE_CODE (fndecl) == FUNCTION_DECL
+ && DECL_BUILT_IN (fndecl)
+ && !gimple_call_va_arg_pack_p (stmt))
+ {
+ int nargs = gimple_call_num_args (stmt);
+
+ /* FIXME: Don't use a list in this interface. */
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ {
+ tree arglist = NULL_TREE;
+ int i;
+ for (i = nargs - 1; i >= 0; i--)
+ arglist = tree_cons (NULL_TREE, gimple_call_arg (stmt, i), arglist);
+ return targetm.fold_builtin (fndecl, arglist, ignore);
+ }
+ else
+ {
+ if (nargs <= MAX_ARGS_TO_FOLD_BUILTIN)
+ {
+ tree args[MAX_ARGS_TO_FOLD_BUILTIN];
+ int i;
+ for (i = 0; i < nargs; i++)
+ args[i] = gimple_call_arg (stmt, i);
+ ret = fold_builtin_n (fndecl, args, nargs, ignore);
+ }
+ if (!ret)
+ ret = gimple_fold_builtin_varargs (fndecl, stmt, ignore);
+ if (ret)
+ {
+ /* Propagate location information from original call to
+ expansion of builtin. Otherwise things like
+ maybe_emit_chk_warning, that operate on the expansion
+ of a builtin, will use the wrong location information. */
+ if (gimple_has_location (stmt))
+ {
+ tree realret = ret;
+ if (TREE_CODE (ret) == NOP_EXPR)
+ realret = TREE_OPERAND (ret, 0);
+ if (CAN_HAVE_LOCATION_P (realret)
+ && !EXPR_HAS_LOCATION (realret))
+ SET_EXPR_LOCATION (realret, gimple_location (stmt));
+ return realret;
+ }
+ return ret;
+ }
+ }
+ }
+ return NULL_TREE;
+}
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