/* Convert function calls to rtl insns, for GNU C compiler.
- Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998
- 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#include "tree.h"
#include "flags.h"
#include "expr.h"
+#include "optabs.h"
#include "libfuncs.h"
#include "function.h"
#include "regs.h"
#include "cgraph.h"
#include "except.h"
-/* Decide whether a function's arguments should be processed
- from first to last or from last to first.
-
- They should if the stack and args grow in opposite directions, but
- only if we have push insns. */
-
-#ifdef PUSH_ROUNDING
-
-#ifndef PUSH_ARGS_REVERSED
-#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
-#define PUSH_ARGS_REVERSED PUSH_ARGS
-#endif
-#endif
-
-#endif
-
-#ifndef PUSH_ARGS_REVERSED
-#define PUSH_ARGS_REVERSED 0
-#endif
-
-#ifndef STACK_POINTER_OFFSET
-#define STACK_POINTER_OFFSET 0
-#endif
-
/* Like PREFERRED_STACK_BOUNDARY but in units of bytes, not bits. */
#define STACK_BYTES (PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT)
argument list for the constructor call. */
int stack_arg_under_construction;
-static int calls_function PARAMS ((tree, int));
-static int calls_function_1 PARAMS ((tree, int));
-
-static void emit_call_1 PARAMS ((rtx, tree, tree, HOST_WIDE_INT,
- HOST_WIDE_INT, HOST_WIDE_INT, rtx,
- rtx, int, rtx, int,
- CUMULATIVE_ARGS *));
-static void precompute_register_parameters PARAMS ((int,
- struct arg_data *,
- int *));
-static int store_one_arg PARAMS ((struct arg_data *, rtx, int, int,
- int));
-static void store_unaligned_arguments_into_pseudos PARAMS ((struct arg_data *,
- int));
-static int finalize_must_preallocate PARAMS ((int, int,
- struct arg_data *,
- struct args_size *));
-static void precompute_arguments PARAMS ((int, int,
- struct arg_data *));
-static int compute_argument_block_size PARAMS ((int,
- struct args_size *,
- int));
-static void initialize_argument_information PARAMS ((int,
- struct arg_data *,
- struct args_size *,
- int, tree, tree,
- CUMULATIVE_ARGS *,
- int, rtx *, int *,
- int *, int *));
-static void compute_argument_addresses PARAMS ((struct arg_data *,
- rtx, int));
-static rtx rtx_for_function_call PARAMS ((tree, tree));
-static void load_register_parameters PARAMS ((struct arg_data *,
- int, rtx *, int,
- int, int *));
-static rtx emit_library_call_value_1 PARAMS ((int, rtx, rtx,
- enum libcall_type,
- enum machine_mode,
- int, va_list));
-static int special_function_p PARAMS ((tree, int));
-static rtx try_to_integrate PARAMS ((tree, tree, rtx,
- int, tree, rtx));
-static int check_sibcall_argument_overlap_1 PARAMS ((rtx));
-static int check_sibcall_argument_overlap PARAMS ((rtx, struct arg_data *,
- int));
-
-static int combine_pending_stack_adjustment_and_call
- PARAMS ((int, struct args_size *, int));
-static tree fix_unsafe_tree PARAMS ((tree));
+static void emit_call_1 (rtx, tree, tree, tree, HOST_WIDE_INT, HOST_WIDE_INT,
+ HOST_WIDE_INT, rtx, rtx, int, rtx, int,
+ CUMULATIVE_ARGS *);
+static void precompute_register_parameters (int, struct arg_data *, int *);
+static int store_one_arg (struct arg_data *, rtx, int, int, int);
+static void store_unaligned_arguments_into_pseudos (struct arg_data *, int);
+static int finalize_must_preallocate (int, int, struct arg_data *,
+ struct args_size *);
+static void precompute_arguments (int, int, struct arg_data *);
+static int compute_argument_block_size (int, struct args_size *, int);
+static void initialize_argument_information (int, struct arg_data *,
+ struct args_size *, int, tree,
+ tree, CUMULATIVE_ARGS *, int,
+ rtx *, int *, int *, int *,
+ bool *, bool);
+static void compute_argument_addresses (struct arg_data *, rtx, int);
+static rtx rtx_for_function_call (tree, tree);
+static void load_register_parameters (struct arg_data *, int, rtx *, int,
+ int, int *);
+static rtx emit_library_call_value_1 (int, rtx, rtx, enum libcall_type,
+ enum machine_mode, int, va_list);
+static int special_function_p (tree, int);
+static int check_sibcall_argument_overlap_1 (rtx);
+static int check_sibcall_argument_overlap (rtx, struct arg_data *, int);
+
+static int combine_pending_stack_adjustment_and_call (int, struct args_size *,
+ int);
+static tree fix_unsafe_tree (tree);
+static bool shift_returned_value (tree, rtx *);
#ifdef REG_PARM_STACK_SPACE
-static rtx save_fixed_argument_area PARAMS ((int, rtx, int *, int *));
-static void restore_fixed_argument_area PARAMS ((rtx, rtx, int, int));
+static rtx save_fixed_argument_area (int, rtx, int *, int *);
+static void restore_fixed_argument_area (rtx, rtx, int, int);
#endif
\f
-/* If WHICH is 1, return 1 if EXP contains a call to the built-in function
- `alloca'.
-
- If WHICH is 0, return 1 if EXP contains a call to any function.
- Actually, we only need return 1 if evaluating EXP would require pushing
- arguments on the stack, but that is too difficult to compute, so we just
- assume any function call might require the stack. */
-
-static tree calls_function_save_exprs;
-
-static int
-calls_function (exp, which)
- tree exp;
- int which;
-{
- int val;
-
- calls_function_save_exprs = 0;
- val = calls_function_1 (exp, which);
- calls_function_save_exprs = 0;
- return val;
-}
-
-/* Recursive function to do the work of above function. */
-
-static int
-calls_function_1 (exp, which)
- tree exp;
- int which;
-{
- int i;
- enum tree_code code = TREE_CODE (exp);
- int class = TREE_CODE_CLASS (code);
- int length = first_rtl_op (code);
-
- /* If this code is language-specific, we don't know what it will do. */
- if ((int) code >= NUM_TREE_CODES)
- return 1;
-
- switch (code)
- {
- case CALL_EXPR:
- if (which == 0)
- return 1;
- else if ((TREE_CODE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0))))
- == FUNCTION_TYPE)
- && (TYPE_RETURNS_STACK_DEPRESSED
- (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0))))))
- return 1;
- else if (TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR
- && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (exp, 0), 0))
- == FUNCTION_DECL)
- && (special_function_p (TREE_OPERAND (TREE_OPERAND (exp, 0), 0),
- 0)
- & ECF_MAY_BE_ALLOCA))
- return 1;
-
- break;
-
- case CONSTRUCTOR:
- {
- tree tem;
-
- for (tem = CONSTRUCTOR_ELTS (exp); tem != 0; tem = TREE_CHAIN (tem))
- if (calls_function_1 (TREE_VALUE (tem), which))
- return 1;
- }
-
- return 0;
-
- case SAVE_EXPR:
- if (SAVE_EXPR_RTL (exp) != 0)
- return 0;
- if (value_member (exp, calls_function_save_exprs))
- return 0;
- calls_function_save_exprs = tree_cons (NULL_TREE, exp,
- calls_function_save_exprs);
- return (TREE_OPERAND (exp, 0) != 0
- && calls_function_1 (TREE_OPERAND (exp, 0), which));
-
- case BLOCK:
- {
- tree local;
- tree subblock;
-
- for (local = BLOCK_VARS (exp); local; local = TREE_CHAIN (local))
- if (DECL_INITIAL (local) != 0
- && calls_function_1 (DECL_INITIAL (local), which))
- return 1;
-
- for (subblock = BLOCK_SUBBLOCKS (exp);
- subblock;
- subblock = TREE_CHAIN (subblock))
- if (calls_function_1 (subblock, which))
- return 1;
- }
- return 0;
-
- case TREE_LIST:
- for (; exp != 0; exp = TREE_CHAIN (exp))
- if (calls_function_1 (TREE_VALUE (exp), which))
- return 1;
- return 0;
-
- default:
- break;
- }
-
- /* Only expressions, references, and blocks can contain calls. */
- if (! IS_EXPR_CODE_CLASS (class) && class != 'r' && class != 'b')
- return 0;
-
- for (i = 0; i < length; i++)
- if (TREE_OPERAND (exp, i) != 0
- && calls_function_1 (TREE_OPERAND (exp, i), which))
- return 1;
-
- return 0;
-}
-\f
/* Force FUNEXP into a form suitable for the address of a CALL,
and return that as an rtx. Also load the static chain register
if FNDECL is a nested function.
CALL_INSN_FUNCTION_USAGE information. */
rtx
-prepare_call_address (funexp, fndecl, call_fusage, reg_parm_seen, sibcallp)
- rtx funexp;
- tree fndecl;
- rtx *call_fusage;
- int reg_parm_seen;
- int sibcallp;
+prepare_call_address (rtx funexp, rtx static_chain_value,
+ rtx *call_fusage, int reg_parm_seen, int sibcallp)
{
- rtx static_chain_value = 0;
-
- funexp = protect_from_queue (funexp, 0);
-
- if (fndecl != 0)
- /* Get possible static chain value for nested function in C. */
- static_chain_value = lookup_static_chain (fndecl);
-
- /* Make a valid memory address and copy constants thru pseudo-regs,
+ /* Make a valid memory address and copy constants through pseudo-regs,
but not for a constant address if -fno-function-cse. */
if (GET_CODE (funexp) != SYMBOL_REF)
/* If we are using registers for parameters, force the
{
#ifndef NO_FUNCTION_CSE
if (optimize && ! flag_no_function_cse)
-#ifdef NO_RECURSIVE_FUNCTION_CSE
- if (fndecl != current_function_decl)
-#endif
- funexp = force_reg (Pmode, funexp);
+ funexp = force_reg (Pmode, funexp);
#endif
}
if (static_chain_value != 0)
{
+ static_chain_value = convert_memory_address (Pmode, static_chain_value);
emit_move_insn (static_chain_rtx, static_chain_value);
- if (GET_CODE (static_chain_rtx) == REG)
+ if (REG_P (static_chain_rtx))
use_reg (call_fusage, static_chain_rtx);
}
denote registers used by the called function. */
static void
-emit_call_1 (funexp, fndecl, funtype, stack_size, rounded_stack_size,
- struct_value_size, next_arg_reg, valreg, old_inhibit_defer_pop,
- call_fusage, ecf_flags, args_so_far)
- rtx funexp;
- tree fndecl ATTRIBUTE_UNUSED;
- tree funtype ATTRIBUTE_UNUSED;
- HOST_WIDE_INT stack_size ATTRIBUTE_UNUSED;
- HOST_WIDE_INT rounded_stack_size;
- HOST_WIDE_INT struct_value_size ATTRIBUTE_UNUSED;
- rtx next_arg_reg ATTRIBUTE_UNUSED;
- rtx valreg;
- int old_inhibit_defer_pop;
- rtx call_fusage;
- int ecf_flags;
- CUMULATIVE_ARGS *args_so_far ATTRIBUTE_UNUSED;
+emit_call_1 (rtx funexp, tree fntree, tree fndecl ATTRIBUTE_UNUSED,
+ tree funtype ATTRIBUTE_UNUSED,
+ HOST_WIDE_INT stack_size ATTRIBUTE_UNUSED,
+ HOST_WIDE_INT rounded_stack_size,
+ HOST_WIDE_INT struct_value_size ATTRIBUTE_UNUSED,
+ rtx next_arg_reg ATTRIBUTE_UNUSED, rtx valreg,
+ int old_inhibit_defer_pop, rtx call_fusage, int ecf_flags,
+ CUMULATIVE_ARGS *args_so_far ATTRIBUTE_UNUSED)
{
rtx rounded_stack_size_rtx = GEN_INT (rounded_stack_size);
rtx call_insn;
#ifdef CALL_POPS_ARGS
n_popped += CALL_POPS_ARGS (* args_so_far);
#endif
-
+
/* 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,
because prepare_call_address already did it if it should be done. */
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_EH_REGION, const0_rtx,
REG_NOTES (call_insn));
else
- note_eh_region_may_contain_throw ();
+ {
+ int rn = lookup_stmt_eh_region (fntree);
+
+ /* If rn < 0, then either (1) tree-ssa not used or (2) doesn't
+ throw, which we already took care of. */
+ if (rn > 0)
+ REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_EH_REGION, GEN_INT (rn),
+ REG_NOTES (call_insn));
+ note_current_region_may_contain_throw ();
+ }
if (ecf_flags & ECF_NORETURN)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_NORETURN, const0_rtx,
if (rounded_stack_size != 0)
{
- if (ecf_flags & ECF_SP_DEPRESSED)
+ if (ecf_flags & (ECF_SP_DEPRESSED | ECF_NORETURN | ECF_LONGJMP))
/* Just pretend we did the pop. */
stack_pointer_delta -= rounded_stack_size;
else if (flag_defer_pop && inhibit_defer_pop == 0
space from the stack such as alloca. */
static int
-special_function_p (fndecl, flags)
- tree fndecl;
- int flags;
+special_function_p (tree fndecl, int flags)
{
- if (! (flags & ECF_MALLOC)
- && fndecl && DECL_NAME (fndecl)
+ if (fndecl && DECL_NAME (fndecl)
&& IDENTIFIER_LENGTH (DECL_NAME (fndecl)) <= 17
/* Exclude functions not at the file scope, or not `extern',
since they are not the magic functions we would otherwise
- think they are. */
- && DECL_CONTEXT (fndecl) == NULL_TREE && TREE_PUBLIC (fndecl))
+ think they are.
+ FIXME: this should be handled with attributes, not with this
+ hacky imitation of DECL_ASSEMBLER_NAME. It's (also) wrong
+ because you can declare fork() inside a function if you
+ wish. */
+ && (DECL_CONTEXT (fndecl) == NULL_TREE
+ || TREE_CODE (DECL_CONTEXT (fndecl)) == TRANSLATION_UNIT_DECL)
+ && TREE_PUBLIC (fndecl))
{
const char *name = IDENTIFIER_POINTER (DECL_NAME (fndecl));
const char *tname = name;
else if (tname[0] == 'l' && tname[1] == 'o'
&& ! strcmp (tname, "longjmp"))
flags |= ECF_LONGJMP;
-
- else if ((tname[0] == 'f' && tname[1] == 'o'
- && ! strcmp (tname, "fork"))
- /* Linux specific: __clone. check NAME to insist on the
- leading underscores, to avoid polluting the ISO / POSIX
- namespace. */
- || (name[0] == '_' && name[1] == '_'
- && ! strcmp (tname, "clone"))
- || (tname[0] == 'e' && tname[1] == 'x' && tname[2] == 'e'
- && tname[3] == 'c' && (tname[4] == 'l' || tname[4] == 'v')
- && (tname[5] == '\0'
- || ((tname[5] == 'p' || tname[5] == 'e')
- && tname[6] == '\0'))))
- flags |= ECF_FORK_OR_EXEC;
}
+
return flags;
}
/* Return nonzero when tree represent call to longjmp. */
int
-setjmp_call_p (fndecl)
- tree fndecl;
+setjmp_call_p (tree fndecl)
{
return special_function_p (fndecl, 0) & ECF_RETURNS_TWICE;
}
/* Return true when exp contains alloca call. */
bool
-alloca_call_p (exp)
- tree exp;
+alloca_call_p (tree exp)
{
if (TREE_CODE (exp) == CALL_EXPR
&& TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR
/* Detect flags (function attributes) from the function decl or type node. */
int
-flags_from_decl_or_type (exp)
- tree exp;
+flags_from_decl_or_type (tree exp)
{
int flags = 0;
tree type = exp;
if (TREE_NOTHROW (exp))
flags |= ECF_NOTHROW;
- }
- if (TREE_READONLY (exp) && ! TREE_THIS_VOLATILE (exp))
- flags |= ECF_CONST | ECF_LIBCALL_BLOCK;
+ if (TREE_READONLY (exp) && ! TREE_THIS_VOLATILE (exp))
+ flags |= ECF_LIBCALL_BLOCK | ECF_CONST;
+
+ flags = special_function_p (exp, flags);
+ }
+ else if (TYPE_P (exp) && TYPE_READONLY (exp) && ! TREE_THIS_VOLATILE (exp))
+ flags |= ECF_CONST;
if (TREE_THIS_VOLATILE (exp))
flags |= ECF_NORETURN;
return flags;
}
+/* Detect flags from a CALL_EXPR. */
+
+int
+call_expr_flags (tree t)
+{
+ int flags;
+ tree decl = get_callee_fndecl (t);
+
+ if (decl)
+ flags = flags_from_decl_or_type (decl);
+ else
+ {
+ t = TREE_TYPE (TREE_OPERAND (t, 0));
+ if (t && TREE_CODE (t) == POINTER_TYPE)
+ flags = flags_from_decl_or_type (TREE_TYPE (t));
+ else
+ flags = 0;
+ }
+
+ return flags;
+}
+
/* Precompute all register parameters as described by ARGS, storing values
into fields within the ARGS array.
Set REG_PARM_SEEN if we encounter a register parameter. */
static void
-precompute_register_parameters (num_actuals, args, reg_parm_seen)
- int num_actuals;
- struct arg_data *args;
- int *reg_parm_seen;
+precompute_register_parameters (int num_actuals, struct arg_data *args, int *reg_parm_seen)
{
int i;
VOIDmode, 0);
preserve_temp_slots (args[i].value);
pop_temp_slots ();
-
- /* ANSI doesn't require a sequence point here,
- but PCC has one, so this will avoid some problems. */
- emit_queue ();
}
/* If the value is a non-legitimate constant, force it into a
register parameters. This is to avoid reload conflicts while
loading the parameters registers. */
- if ((! (GET_CODE (args[i].value) == REG
+ if ((! (REG_P (args[i].value)
|| (GET_CODE (args[i].value) == SUBREG
- && GET_CODE (SUBREG_REG (args[i].value)) == REG)))
+ && REG_P (SUBREG_REG (args[i].value)))))
&& args[i].mode != BLKmode
&& rtx_cost (args[i].value, SET) > COSTS_N_INSNS (1)
&& ((SMALL_REGISTER_CLASSES && *reg_parm_seen)
parameters, we must save and restore it. */
static rtx
-save_fixed_argument_area (reg_parm_stack_space, argblock,
- low_to_save, high_to_save)
- int reg_parm_stack_space;
- rtx argblock;
- int *low_to_save;
- int *high_to_save;
+save_fixed_argument_area (int reg_parm_stack_space, rtx argblock, int *low_to_save, int *high_to_save)
{
int low;
int high;
}
static void
-restore_fixed_argument_area (save_area, argblock, high_to_save, low_to_save)
- rtx save_area;
- rtx argblock;
- int high_to_save;
- int low_to_save;
+restore_fixed_argument_area (rtx save_area, rtx argblock, int high_to_save, int low_to_save)
{
enum machine_mode save_mode = GET_MODE (save_area);
int delta;
the aligned_regs array if it is nonzero. */
static void
-store_unaligned_arguments_into_pseudos (args, num_actuals)
- struct arg_data *args;
- int num_actuals;
+store_unaligned_arguments_into_pseudos (struct arg_data *args, int num_actuals)
{
int i, j;
< (unsigned int) MIN (BIGGEST_ALIGNMENT, BITS_PER_WORD)))
{
int bytes = int_size_in_bytes (TREE_TYPE (args[i].tree_value));
- int big_endian_correction = 0;
-
- args[i].n_aligned_regs
- = args[i].partial ? args[i].partial
- : (bytes + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
+ int nregs = (bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
+ int endian_correction = 0;
- args[i].aligned_regs = (rtx *) xmalloc (sizeof (rtx)
- * args[i].n_aligned_regs);
+ args[i].n_aligned_regs = args[i].partial ? args[i].partial : nregs;
+ args[i].aligned_regs = xmalloc (sizeof (rtx) * args[i].n_aligned_regs);
- /* Structures smaller than a word are aligned to the least
- significant byte (to the right). On a BYTES_BIG_ENDIAN machine,
+ /* Structures smaller than a word are normally aligned to the
+ least significant byte. On a BYTES_BIG_ENDIAN machine,
this means we must skip the empty high order bytes when
calculating the bit offset. */
- if (BYTES_BIG_ENDIAN
- && bytes < UNITS_PER_WORD)
- big_endian_correction = (BITS_PER_WORD - (bytes * BITS_PER_UNIT));
+ if (bytes < UNITS_PER_WORD
+#ifdef BLOCK_REG_PADDING
+ && (BLOCK_REG_PADDING (args[i].mode,
+ TREE_TYPE (args[i].tree_value), 1)
+ == downward)
+#else
+ && BYTES_BIG_ENDIAN
+#endif
+ )
+ endian_correction = BITS_PER_WORD - bytes * BITS_PER_UNIT;
for (j = 0; j < args[i].n_aligned_regs; j++)
{
int bitsize = MIN (bytes * BITS_PER_UNIT, BITS_PER_WORD);
args[i].aligned_regs[j] = reg;
+ word = extract_bit_field (word, bitsize, 0, 1, NULL_RTX,
+ word_mode, word_mode);
/* There is no need to restrict this code to loading items
in TYPE_ALIGN sized hunks. The bitfield instructions can
emit_move_insn (reg, const0_rtx);
bytes -= bitsize / BITS_PER_UNIT;
- store_bit_field (reg, bitsize, big_endian_correction, word_mode,
- extract_bit_field (word, bitsize, 0, 1, NULL_RTX,
- word_mode, word_mode,
- BITS_PER_WORD),
- BITS_PER_WORD);
+ store_bit_field (reg, bitsize, endian_correction, word_mode,
+ word);
}
}
}
and may be modified by this routine.
OLD_PENDING_ADJ, MUST_PREALLOCATE and FLAGS are pointers to integer
- flags which may may be modified by this routine. */
+ flags which may may be modified by this routine.
+
+ MAY_TAILCALL is cleared if we encounter an invisible pass-by-reference
+ that requires allocation of stack space.
+
+ CALL_FROM_THUNK_P is true if this call is the jump from a thunk to
+ the thunked-to function. */
static void
-initialize_argument_information (num_actuals, args, args_size, n_named_args,
- actparms, fndecl, args_so_far,
- reg_parm_stack_space, old_stack_level,
- old_pending_adj, must_preallocate,
- ecf_flags)
- int num_actuals ATTRIBUTE_UNUSED;
- struct arg_data *args;
- struct args_size *args_size;
- int n_named_args ATTRIBUTE_UNUSED;
- tree actparms;
- tree fndecl;
- CUMULATIVE_ARGS *args_so_far;
- int reg_parm_stack_space;
- rtx *old_stack_level;
- int *old_pending_adj;
- int *must_preallocate;
- int *ecf_flags;
+initialize_argument_information (int num_actuals ATTRIBUTE_UNUSED,
+ struct arg_data *args,
+ struct args_size *args_size,
+ int n_named_args ATTRIBUTE_UNUSED,
+ tree actparms, tree fndecl,
+ CUMULATIVE_ARGS *args_so_far,
+ int reg_parm_stack_space,
+ rtx *old_stack_level, int *old_pending_adj,
+ int *must_preallocate, int *ecf_flags,
+ bool *may_tailcall, bool call_from_thunk_p)
{
/* 1 if scanning parms front to back, -1 if scanning back to front. */
int inc;
with those made by function.c. */
/* See if this argument should be passed by invisible reference. */
- if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type))
- || TREE_ADDRESSABLE (type)
-#ifdef FUNCTION_ARG_PASS_BY_REFERENCE
- || FUNCTION_ARG_PASS_BY_REFERENCE (*args_so_far, TYPE_MODE (type),
- type, argpos < n_named_args)
-#endif
- )
+ if (pass_by_reference (args_so_far, TYPE_MODE (type),
+ type, argpos < n_named_args))
{
/* If we're compiling a thunk, pass through invisible
references instead of making a copy. */
- if (current_function_is_thunk
-#ifdef FUNCTION_ARG_CALLEE_COPIES
+ if (call_from_thunk_p
|| (FUNCTION_ARG_CALLEE_COPIES (*args_so_far, TYPE_MODE (type),
type, argpos < n_named_args)
/* If it's in a register, we must make a copy of it too. */
&& !(TREE_CODE (args[i].tree_value) == VAR_DECL
&& REG_P (DECL_RTL (args[i].tree_value)))
&& ! TREE_ADDRESSABLE (type))
-#endif
)
{
/* C++ uses a TARGET_EXPR to indicate that we want to make a
&& ! REG_P (DECL_RTL (TREE_OPERAND (args[i].tree_value, 1))))
args[i].tree_value = TREE_OPERAND (args[i].tree_value, 1);
+ /* We can't use sibcalls if a callee-copied argument is stored
+ in the current function's frame. */
+ if (!call_from_thunk_p
+ && (!DECL_P (args[i].tree_value)
+ || !TREE_STATIC (args[i].tree_value)))
+ *may_tailcall = false;
+
args[i].tree_value = build1 (ADDR_EXPR,
build_pointer_type (type),
args[i].tree_value);
build_pointer_type (type),
args[i].tree_value);
type = build_pointer_type (type);
+ *may_tailcall = false;
}
else
{
build_pointer_type (type),
make_tree (type, copy));
type = build_pointer_type (type);
+ *may_tailcall = false;
}
}
mode = TYPE_MODE (type);
- unsignedp = TREE_UNSIGNED (type);
+ unsignedp = TYPE_UNSIGNED (type);
-#ifdef PROMOTE_FUNCTION_ARGS
- mode = promote_mode (type, mode, &unsignedp, 1);
-#endif
+ if (targetm.calls.promote_function_args (fndecl ? TREE_TYPE (fndecl) : 0))
+ mode = promote_mode (type, mode, &unsignedp, 1);
args[i].unsignedp = unsignedp;
args[i].mode = mode;
args[i].tail_call_reg = args[i].reg;
#endif
-#ifdef FUNCTION_ARG_PARTIAL_NREGS
if (args[i].reg)
args[i].partial
= FUNCTION_ARG_PARTIAL_NREGS (*args_so_far, mode, type,
argpos < n_named_args);
-#endif
- args[i].pass_on_stack = MUST_PASS_IN_STACK (mode, type);
+ args[i].pass_on_stack = targetm.calls.must_pass_in_stack (mode, type);
/* If FUNCTION_ARG returned a (parallel [(expr_list (nil) ...) ...]),
it means that we are to pass this arg in the register(s) designated
#endif
args[i].pass_on_stack ? 0 : args[i].partial,
fndecl, args_size, &args[i].locate);
+#ifdef BLOCK_REG_PADDING
+ else
+ /* The argument is passed entirely in registers. See at which
+ end it should be padded. */
+ args[i].locate.where_pad =
+ BLOCK_REG_PADDING (mode, type,
+ int_size_in_bytes (type) <= UNITS_PER_WORD);
+#endif
/* Update ARGS_SIZE, the total stack space for args so far. */
for arguments passed in registers. */
static int
-compute_argument_block_size (reg_parm_stack_space, args_size,
- preferred_stack_boundary)
- int reg_parm_stack_space;
- struct args_size *args_size;
- int preferred_stack_boundary ATTRIBUTE_UNUSED;
+compute_argument_block_size (int reg_parm_stack_space,
+ struct args_size *args_size,
+ int preferred_stack_boundary ATTRIBUTE_UNUSED)
{
int unadjusted_args_size = args_size->constant;
args_size->constant = MAX (args_size->constant,
reg_parm_stack_space);
-#ifdef MAYBE_REG_PARM_STACK_SPACE
- if (reg_parm_stack_space == 0)
- args_size->constant = 0;
-#endif
-
#ifndef OUTGOING_REG_PARM_STACK_SPACE
args_size->constant -= reg_parm_stack_space;
#endif
precomputed argument. */
static void
-precompute_arguments (flags, num_actuals, args)
- int flags;
- int num_actuals;
- struct arg_data *args;
+precompute_arguments (int flags, int num_actuals, struct arg_data *args)
{
int i;
- /* If this function call is cse'able, precompute all the parameters.
- Note that if the parameter is constructed into a temporary, this will
- cause an additional copy because the parameter will be constructed
- into a temporary location and then copied into the outgoing arguments.
- If a parameter contains a call to alloca and this function uses the
- stack, precompute the parameter. */
-
- /* If we preallocated the stack space, and some arguments must be passed
- on the stack, then we must precompute any parameter which contains a
- function call which will store arguments on the stack.
- Otherwise, evaluating the parameter may clobber previous parameters
- which have already been stored into the stack. (we have code to avoid
- such case by saving the outgoing stack arguments, but it results in
- worse code) */
+ /* If this is a libcall, then precompute all arguments so that we do not
+ get extraneous instructions emitted as part of the libcall sequence. */
+ if ((flags & ECF_LIBCALL_BLOCK) == 0)
+ return;
for (i = 0; i < num_actuals; i++)
- if ((flags & ECF_LIBCALL_BLOCK)
- || calls_function (args[i].tree_value, !ACCUMULATE_OUTGOING_ARGS))
- {
- enum machine_mode mode;
-
- /* If this is an addressable type, we cannot pre-evaluate it. */
- if (TREE_ADDRESSABLE (TREE_TYPE (args[i].tree_value)))
- abort ();
-
- args[i].value
- = expand_expr (args[i].tree_value, NULL_RTX, VOIDmode, 0);
+ {
+ enum machine_mode mode;
- /* ANSI doesn't require a sequence point here,
- but PCC has one, so this will avoid some problems. */
- emit_queue ();
+ /* If this is an addressable type, we cannot pre-evaluate it. */
+ if (TREE_ADDRESSABLE (TREE_TYPE (args[i].tree_value)))
+ abort ();
- args[i].initial_value = args[i].value
- = protect_from_queue (args[i].value, 0);
+ args[i].initial_value = args[i].value
+ = expand_expr (args[i].tree_value, NULL_RTX, VOIDmode, 0);
- mode = TYPE_MODE (TREE_TYPE (args[i].tree_value));
- if (mode != args[i].mode)
- {
- args[i].value
- = convert_modes (args[i].mode, mode,
- args[i].value, args[i].unsignedp);
-#ifdef PROMOTE_FOR_CALL_ONLY
- /* CSE will replace this only if it contains args[i].value
- pseudo, so convert it down to the declared mode using
- a SUBREG. */
- if (GET_CODE (args[i].value) == REG
- && GET_MODE_CLASS (args[i].mode) == MODE_INT)
- {
- args[i].initial_value
- = gen_lowpart_SUBREG (mode, args[i].value);
- SUBREG_PROMOTED_VAR_P (args[i].initial_value) = 1;
- SUBREG_PROMOTED_UNSIGNED_SET (args[i].initial_value,
- args[i].unsignedp);
- }
+ mode = TYPE_MODE (TREE_TYPE (args[i].tree_value));
+ if (mode != args[i].mode)
+ {
+ args[i].value
+ = convert_modes (args[i].mode, mode,
+ args[i].value, args[i].unsignedp);
+#if defined(PROMOTE_FUNCTION_MODE) && !defined(PROMOTE_MODE)
+ /* CSE will replace this only if it contains args[i].value
+ pseudo, so convert it down to the declared mode using
+ a SUBREG. */
+ if (REG_P (args[i].value)
+ && GET_MODE_CLASS (args[i].mode) == MODE_INT)
+ {
+ args[i].initial_value
+ = gen_lowpart_SUBREG (mode, args[i].value);
+ SUBREG_PROMOTED_VAR_P (args[i].initial_value) = 1;
+ SUBREG_PROMOTED_UNSIGNED_SET (args[i].initial_value,
+ args[i].unsignedp);
+ }
#endif
- }
- }
+ }
+ }
}
/* Given the current state of MUST_PREALLOCATE and information about
compute and return the final value for MUST_PREALLOCATE. */
static int
-finalize_must_preallocate (must_preallocate, num_actuals, args, args_size)
- int must_preallocate;
- int num_actuals;
- struct arg_data *args;
- struct args_size *args_size;
+finalize_must_preallocate (int must_preallocate, int num_actuals, struct arg_data *args, struct args_size *args_size)
{
/* See if we have or want to preallocate stack space.
ARGBLOCK is an rtx for the address of the outgoing arguments. */
static void
-compute_argument_addresses (args, argblock, num_actuals)
- struct arg_data *args;
- rtx argblock;
- int num_actuals;
+compute_argument_addresses (struct arg_data *args, rtx argblock, int num_actuals)
{
if (argblock)
{
ADDR is the operand 0 of CALL_EXPR for this call. */
static rtx
-rtx_for_function_call (fndecl, addr)
- tree fndecl;
- tree addr;
+rtx_for_function_call (tree fndecl, tree addr)
{
rtx funexp;
push_temp_slots ();
funexp = expand_expr (addr, NULL_RTX, VOIDmode, 0);
pop_temp_slots (); /* FUNEXP can't be BLKmode. */
- emit_queue ();
}
return funexp;
}
expressions were already evaluated.
Mark all register-parms as living through the call, putting these USE
- insns in the CALL_INSN_FUNCTION_USAGE field.
-
+ insns in the CALL_INSN_FUNCTION_USAGE field.
+
When IS_SIBCALL, perform the check_sibcall_overlap_argument_overlap
checking, setting *SIBCALL_FAILURE if appropriate. */
static void
-load_register_parameters (args, num_actuals, call_fusage, flags,
- is_sibcall, sibcall_failure)
- struct arg_data *args;
- int num_actuals;
- rtx *call_fusage;
- int flags;
- int is_sibcall;
- int *sibcall_failure;
+load_register_parameters (struct arg_data *args, int num_actuals,
+ rtx *call_fusage, int flags, int is_sibcall,
+ int *sibcall_failure)
{
int i, j;
-#ifdef LOAD_ARGS_REVERSED
- for (i = num_actuals - 1; i >= 0; i--)
-#else
for (i = 0; i < num_actuals; i++)
-#endif
{
rtx reg = ((flags & ECF_SIBCALL)
? args[i].tail_call_reg : args[i].reg);
- int partial = args[i].partial;
- int nregs;
-
if (reg)
{
+ int partial = args[i].partial;
+ int nregs;
+ int size = 0;
rtx before_arg = get_last_insn ();
/* Set to non-negative if must move a word at a time, even if just
one word (e.g, partial == 1 && mode == DFmode). Set to -1 if
we just use a normal move insn. This value can be zero if the
argument is a zero size structure with no fields. */
- nregs = (partial ? partial
- : (TYPE_MODE (TREE_TYPE (args[i].tree_value)) == BLKmode
- ? ((int_size_in_bytes (TREE_TYPE (args[i].tree_value))
- + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
- : -1));
+ nregs = -1;
+ if (partial)
+ nregs = partial;
+ else if (TYPE_MODE (TREE_TYPE (args[i].tree_value)) == BLKmode)
+ {
+ size = int_size_in_bytes (TREE_TYPE (args[i].tree_value));
+ nregs = (size + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
+ }
+ else
+ size = GET_MODE_SIZE (args[i].mode);
/* Handle calls that pass values in multiple non-contiguous
locations. The Irix 6 ABI has examples of this. */
if (GET_CODE (reg) == PARALLEL)
- emit_group_load (reg, args[i].value,
- int_size_in_bytes (TREE_TYPE (args[i].tree_value)));
+ {
+ tree type = TREE_TYPE (args[i].tree_value);
+ emit_group_load (reg, args[i].value, type,
+ int_size_in_bytes (type));
+ }
/* If simple case, just do move. If normal partial, store_one_arg
has already loaded the register for us. In all other cases,
load the register(s) from memory. */
else if (nregs == -1)
- emit_move_insn (reg, args[i].value);
+ {
+ emit_move_insn (reg, args[i].value);
+#ifdef BLOCK_REG_PADDING
+ /* Handle case where we have a value that needs shifting
+ up to the msb. eg. a QImode value and we're padding
+ upward on a BYTES_BIG_ENDIAN machine. */
+ if (size < UNITS_PER_WORD
+ && (args[i].locate.where_pad
+ == (BYTES_BIG_ENDIAN ? upward : downward)))
+ {
+ rtx x;
+ int shift = (UNITS_PER_WORD - size) * BITS_PER_UNIT;
+
+ /* Assigning REG here rather than a temp makes CALL_FUSAGE
+ report the whole reg as used. Strictly speaking, the
+ call only uses SIZE bytes at the msb end, but it doesn't
+ seem worth generating rtl to say that. */
+ reg = gen_rtx_REG (word_mode, REGNO (reg));
+ x = expand_shift (LSHIFT_EXPR, word_mode, reg,
+ build_int_2 (shift, 0), reg, 1);
+ if (x != reg)
+ emit_move_insn (reg, x);
+ }
+#endif
+ }
/* If we have pre-computed the values to put in the registers in
the case of non-aligned structures, copy them in now. */
args[i].aligned_regs[j]);
else if (partial == 0 || args[i].pass_on_stack)
- move_block_to_reg (REGNO (reg),
- validize_mem (args[i].value), nregs,
- args[i].mode);
+ {
+ rtx mem = validize_mem (args[i].value);
+
+ /* Handle a BLKmode that needs shifting. */
+ if (nregs == 1 && size < UNITS_PER_WORD
+#ifdef BLOCK_REG_PADDING
+ && args[i].locate.where_pad == downward
+#else
+ && BYTES_BIG_ENDIAN
+#endif
+ )
+ {
+ rtx tem = operand_subword_force (mem, 0, args[i].mode);
+ rtx ri = gen_rtx_REG (word_mode, REGNO (reg));
+ rtx x = gen_reg_rtx (word_mode);
+ int shift = (UNITS_PER_WORD - size) * BITS_PER_UNIT;
+ enum tree_code dir = BYTES_BIG_ENDIAN ? RSHIFT_EXPR
+ : LSHIFT_EXPR;
+
+ emit_move_insn (x, tem);
+ x = expand_shift (dir, word_mode, x,
+ build_int_2 (shift, 0), ri, 1);
+ if (x != ri)
+ emit_move_insn (ri, x);
+ }
+ else
+ move_block_to_reg (REGNO (reg), mem, nregs, args[i].mode);
+ }
/* When a parameter is a block, and perhaps in other cases, it is
possible that it did a load from an argument slot that was
}
}
-/* Try to integrate function. See expand_inline_function for documentation
- about the parameters. */
-
-static rtx
-try_to_integrate (fndecl, actparms, target, ignore, type, structure_value_addr)
- tree fndecl;
- tree actparms;
- rtx target;
- int ignore;
- tree type;
- rtx structure_value_addr;
-{
- rtx temp;
- rtx before_call;
- int i;
- rtx old_stack_level = 0;
- int reg_parm_stack_space = 0;
-
-#ifdef REG_PARM_STACK_SPACE
-#ifdef MAYBE_REG_PARM_STACK_SPACE
- reg_parm_stack_space = MAYBE_REG_PARM_STACK_SPACE;
-#else
- reg_parm_stack_space = REG_PARM_STACK_SPACE (fndecl);
-#endif
-#endif
-
- before_call = get_last_insn ();
-
- timevar_push (TV_INTEGRATION);
-
- temp = expand_inline_function (fndecl, actparms, target,
- ignore, type,
- structure_value_addr);
-
- timevar_pop (TV_INTEGRATION);
-
- /* If inlining succeeded, return. */
- if (temp != (rtx) (size_t) - 1)
- {
- if (ACCUMULATE_OUTGOING_ARGS)
- {
- /* If the outgoing argument list must be preserved, push
- the stack before executing the inlined function if it
- makes any calls. */
-
- i = reg_parm_stack_space;
- if (i > highest_outgoing_arg_in_use)
- i = highest_outgoing_arg_in_use;
- while (--i >= 0 && stack_usage_map[i] == 0)
- ;
-
- if (stack_arg_under_construction || i >= 0)
- {
- rtx first_insn
- = before_call ? NEXT_INSN (before_call) : get_insns ();
- rtx insn = NULL_RTX, seq;
-
- /* Look for a call in the inline function code.
- If DECL_SAVED_INSNS (fndecl)->outgoing_args_size is
- nonzero then there is a call and it is not necessary
- to scan the insns. */
-
- if (DECL_SAVED_INSNS (fndecl)->outgoing_args_size == 0)
- for (insn = first_insn; insn; insn = NEXT_INSN (insn))
- if (GET_CODE (insn) == CALL_INSN)
- break;
-
- if (insn)
- {
- /* Reserve enough stack space so that the largest
- argument list of any function call in the inline
- function does not overlap the argument list being
- evaluated. This is usually an overestimate because
- allocate_dynamic_stack_space reserves space for an
- outgoing argument list in addition to the requested
- space, but there is no way to ask for stack space such
- that an argument list of a certain length can be
- safely constructed.
-
- Add the stack space reserved for register arguments, if
- any, in the inline function. What is really needed is the
- largest value of reg_parm_stack_space in the inline
- function, but that is not available. Using the current
- value of reg_parm_stack_space is wrong, but gives
- correct results on all supported machines. */
-
- int adjust = (DECL_SAVED_INSNS (fndecl)->outgoing_args_size
- + reg_parm_stack_space);
-
- start_sequence ();
- emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
- allocate_dynamic_stack_space (GEN_INT (adjust),
- NULL_RTX, BITS_PER_UNIT);
- seq = get_insns ();
- end_sequence ();
- emit_insn_before (seq, first_insn);
- emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX);
- }
- }
- }
-
- /* If the result is equivalent to TARGET, return TARGET to simplify
- checks in store_expr. They can be equivalent but not equal in the
- case of a function that returns BLKmode. */
- if (temp != target && rtx_equal_p (temp, target))
- return target;
- return temp;
- }
-
- /* If inlining failed, mark FNDECL as needing to be compiled
- separately after all. If function was declared inline,
- give a warning. */
- if (DECL_INLINE (fndecl) && warn_inline && !flag_no_inline
- && optimize > 0 && !TREE_ADDRESSABLE (fndecl))
- {
- warning_with_decl (fndecl, "inlining failed in call to `%s'");
- warning ("called from here");
- }
- (*lang_hooks.mark_addressable) (fndecl);
- return (rtx) (size_t) - 1;
-}
-
/* We need to pop PENDING_STACK_ADJUST bytes. But, if the arguments
wouldn't fill up an even multiple of PREFERRED_UNIT_STACK_BOUNDARY
bytes, then we would need to push some additional bytes to pad the
be popped after the call. Returns the adjustment. */
static int
-combine_pending_stack_adjustment_and_call (unadjusted_args_size,
- args_size,
- preferred_unit_stack_boundary)
- int unadjusted_args_size;
- struct args_size *args_size;
- int preferred_unit_stack_boundary;
+combine_pending_stack_adjustment_and_call (int unadjusted_args_size,
+ struct args_size *args_size,
+ int preferred_unit_stack_boundary)
{
/* The number of bytes to pop so that the stack will be
under-aligned by UNADJUSTED_ARGS_SIZE bytes. */
zero otherwise. */
static int
-check_sibcall_argument_overlap_1 (x)
- rtx x;
+check_sibcall_argument_overlap_1 (rtx x)
{
RTX_CODE code;
int i, j;
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT)
i = INTVAL (XEXP (XEXP (x, 0), 1));
else
- return 0;
+ return 1;
#ifdef ARGS_GROW_DOWNWARD
i = -i - GET_MODE_SIZE (GET_MODE (x));
slots, zero otherwise. */
static int
-check_sibcall_argument_overlap (insn, arg, mark_stored_args_map)
- rtx insn;
- struct arg_data *arg;
- int mark_stored_args_map;
+check_sibcall_argument_overlap (rtx insn, struct arg_data *arg, int mark_stored_args_map)
{
int low, high;
}
static tree
-fix_unsafe_tree (t)
- tree t;
+fix_unsafe_tree (tree t)
{
switch (unsafe_for_reeval (t))
{
return t;
}
+
+/* If function value *VALUE was returned at the most significant end of a
+ register, shift it towards the least significant end and convert it to
+ TYPE's mode. Return true and update *VALUE if some action was needed.
+
+ TYPE is the type of the function's return value, which is known not
+ to have mode BLKmode. */
+
+static bool
+shift_returned_value (tree type, rtx *value)
+{
+ if (targetm.calls.return_in_msb (type))
+ {
+ HOST_WIDE_INT shift;
+
+ shift = (GET_MODE_BITSIZE (GET_MODE (*value))
+ - BITS_PER_UNIT * int_size_in_bytes (type));
+ if (shift > 0)
+ {
+ /* Shift the value into the low part of the register. */
+ *value = expand_binop (GET_MODE (*value), lshr_optab, *value,
+ GEN_INT (shift), 0, 1, OPTAB_WIDEN);
+
+ /* Truncate it to the type's mode, or its integer equivalent.
+ This is subject to TRULY_NOOP_TRUNCATION. */
+ *value = convert_to_mode (int_mode_for_mode (TYPE_MODE (type)),
+ *value, 0);
+
+ /* Now convert it to the final form. */
+ *value = gen_lowpart (TYPE_MODE (type), *value);
+ return true;
+ }
+ }
+ return false;
+}
+
+/* Remove all REG_EQUIV notes found in the insn chain. */
+
+static void
+purge_reg_equiv_notes (void)
+{
+ rtx insn;
+
+ for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
+ {
+ while (1)
+ {
+ rtx note = find_reg_note (insn, REG_EQUIV, 0);
+ if (note)
+ {
+ /* Remove the note and keep looking at the notes for
+ this insn. */
+ remove_note (insn, note);
+ continue;
+ }
+ break;
+ }
+ }
+}
+
+/* Clear RTX_UNCHANGING_P flag of incoming argument MEMs. */
+
+static void
+purge_mem_unchanging_flag (rtx x)
+{
+ RTX_CODE code;
+ int i, j;
+ const char *fmt;
+
+ if (x == NULL_RTX)
+ return;
+
+ code = GET_CODE (x);
+
+ if (code == MEM)
+ {
+ if (RTX_UNCHANGING_P (x)
+ && (XEXP (x, 0) == current_function_internal_arg_pointer
+ || (GET_CODE (XEXP (x, 0)) == PLUS
+ && XEXP (XEXP (x, 0), 0) ==
+ current_function_internal_arg_pointer
+ && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT)))
+ RTX_UNCHANGING_P (x) = 0;
+ return;
+ }
+
+ /* Scan all subexpressions. */
+ fmt = GET_RTX_FORMAT (code);
+ for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++)
+ {
+ if (*fmt == 'e')
+ purge_mem_unchanging_flag (XEXP (x, i));
+ else if (*fmt == 'E')
+ for (j = 0; j < XVECLEN (x, i); j++)
+ purge_mem_unchanging_flag (XVECEXP (x, i, j));
+ }
+}
+
+
/* Generate all the code for a function call
and return an rtx for its value.
Store the value in TARGET (specified as an rtx) if convenient.
If IGNORE is nonzero, then we ignore the value of the function call. */
rtx
-expand_call (exp, target, ignore)
- tree exp;
- rtx target;
- int ignore;
+expand_call (tree exp, rtx target, int ignore)
{
/* Nonzero if we are currently expanding a call. */
static int currently_expanding_call = 0;
tree actparms = TREE_OPERAND (exp, 1);
/* RTX for the function to be called. */
rtx funexp;
- /* Sequence of insns to perform a tail recursive "call". */
- rtx tail_recursion_insns = NULL_RTX;
/* Sequence of insns to perform a normal "call". */
rtx normal_call_insns = NULL_RTX;
- /* Sequence of insns to perform a tail recursive "call". */
+ /* Sequence of insns to perform a tail "call". */
rtx tail_call_insns = NULL_RTX;
/* Data type of the function. */
tree funtype;
/* Declaration of the function being called,
or 0 if the function is computed (not known by name). */
tree fndecl = 0;
- rtx insn;
- int try_tail_call = 1;
- int try_tail_recursion = 1;
+ /* The type of the function being called. */
+ tree fntype;
+ bool try_tail_call = CALL_EXPR_TAILCALL (exp);
int pass;
/* Register in which non-BLKmode value will be returned,
/* Nonzero if called function returns an aggregate in memory PCC style,
by returning the address of where to find it. */
int pcc_struct_value = 0;
+ rtx struct_value = 0;
/* Number of actual parameters in this call, including struct value addr. */
int num_actuals;
/* Mask of ECF_ flags. */
int flags = 0;
- /* Nonzero if this is a call to an inline function. */
- int is_integrable = 0;
#ifdef REG_PARM_STACK_SPACE
/* Define the boundary of the register parm stack space that needs to be
saved, if any. */
HOST_WIDE_INT preferred_stack_boundary;
/* The alignment of the stack, in bytes. */
HOST_WIDE_INT preferred_unit_stack_boundary;
-
+ /* The static chain value to use for this call. */
+ rtx static_chain_value;
/* See if this is "nothrow" function call. */
if (TREE_NOTHROW (exp))
flags |= ECF_NOTHROW;
- /* See if we can find a DECL-node for the actual function.
- As a result, decide whether this is a call to an integrable function. */
-
+ /* See if we can find a DECL-node for the actual function, and get the
+ function attributes (flags) from the function decl or type node. */
fndecl = get_callee_fndecl (exp);
if (fndecl)
{
- if (!flag_no_inline
- && fndecl != current_function_decl
- && DECL_INLINE (fndecl)
- && DECL_SAVED_INSNS (fndecl)
- && DECL_SAVED_INSNS (fndecl)->inlinable)
- is_integrable = 1;
- else if (! TREE_ADDRESSABLE (fndecl))
- {
- /* In case this function later becomes inlinable,
- record that there was already a non-inline call to it.
-
- Use abstraction instead of setting TREE_ADDRESSABLE
- directly. */
- if (DECL_INLINE (fndecl) && warn_inline && !flag_no_inline
- && optimize > 0)
- {
- warning_with_decl (fndecl, "can't inline call to `%s'");
- warning ("called from here");
- }
- (*lang_hooks.mark_addressable) (fndecl);
- }
-
+ fntype = TREE_TYPE (fndecl);
flags |= flags_from_decl_or_type (fndecl);
}
-
- /* If we don't have specific function to call, see if we have a
- attributes set in the type. */
else
- flags |= flags_from_decl_or_type (TREE_TYPE (TREE_TYPE (p)));
+ {
+ fntype = TREE_TYPE (TREE_TYPE (p));
+ flags |= flags_from_decl_or_type (fntype);
+ }
+
+ struct_value = targetm.calls.struct_value_rtx (fntype, 0);
/* Warn if this value is an aggregate type,
regardless of which calling convention we are using for it. */
}
#ifdef REG_PARM_STACK_SPACE
-#ifdef MAYBE_REG_PARM_STACK_SPACE
- reg_parm_stack_space = MAYBE_REG_PARM_STACK_SPACE;
-#else
reg_parm_stack_space = REG_PARM_STACK_SPACE (fndecl);
#endif
-#endif
#ifndef OUTGOING_REG_PARM_STACK_SPACE
if (reg_parm_stack_space > 0 && PUSH_ARGS)
/* Set up a place to return a structure. */
/* Cater to broken compilers. */
- if (aggregate_value_p (exp))
+ if (aggregate_value_p (exp, fndecl))
{
/* This call returns a big structure. */
flags &= ~(ECF_CONST | ECF_PURE | ECF_LIBCALL_BLOCK);
#ifdef PCC_STATIC_STRUCT_RETURN
{
pcc_struct_value = 1;
- /* Easier than making that case work right. */
- if (is_integrable)
- {
- /* In case this is a static function, note that it has been
- used. */
- if (! TREE_ADDRESSABLE (fndecl))
- (*lang_hooks.mark_addressable) (fndecl);
- is_integrable = 0;
- }
}
#else /* not PCC_STATIC_STRUCT_RETURN */
{
structure_value_addr = expand_expr (return_arg, NULL_RTX,
VOIDmode, EXPAND_NORMAL);
}
- else if (target && GET_CODE (target) == MEM)
+ else if (target && MEM_P (target))
structure_value_addr = XEXP (target, 0);
else
{
#endif /* not PCC_STATIC_STRUCT_RETURN */
}
- /* If called function is inline, try to integrate it. */
-
- if (is_integrable)
- {
- rtx temp = try_to_integrate (fndecl, actparms, target,
- ignore, TREE_TYPE (exp),
- structure_value_addr);
- if (temp != (rtx) (size_t) - 1)
- return temp;
- }
-
/* Figure out the amount to which the stack should be aligned. */
preferred_stack_boundary = PREFERRED_STACK_BOUNDARY;
if (fndecl)
/* Munge the tree to split complex arguments into their imaginary
and real parts. */
- if (SPLIT_COMPLEX_ARGS)
+ if (targetm.calls.split_complex_arg)
{
type_arg_types = split_complex_types (TYPE_ARG_TYPES (funtype));
actparms = split_complex_values (actparms);
else
type_arg_types = TYPE_ARG_TYPES (funtype);
- /* See if this is a call to a function that can return more than once
- or a call to longjmp or malloc. */
- flags |= special_function_p (fndecl, flags);
-
if (flags & ECF_MAY_BE_ALLOCA)
current_function_calls_alloca = 1;
/* If struct_value_rtx is 0, it means pass the address
as if it were an extra parameter. */
- if (structure_value_addr && struct_value_rtx == 0)
+ if (structure_value_addr && struct_value == 0)
{
/* If structure_value_addr is a REG other than
virtual_outgoing_args_rtx, we can use always use it. If it
is not a REG, we must always copy it into a register.
If it is virtual_outgoing_args_rtx, we must copy it to another
register in some cases. */
- rtx temp = (GET_CODE (structure_value_addr) != REG
+ rtx temp = (!REG_P (structure_value_addr)
|| (ACCUMULATE_OUTGOING_ARGS
&& stack_arg_under_construction
&& structure_value_addr == virtual_outgoing_args_rtx)
- ? copy_addr_to_reg (structure_value_addr)
+ ? copy_addr_to_reg (convert_memory_address
+ (Pmode, structure_value_addr))
: structure_value_addr);
actparms
num_actuals++;
/* Compute number of named args.
- Normally, don't include the last named arg if anonymous args follow.
- We do include the last named arg if STRICT_ARGUMENT_NAMING is nonzero.
- (If no anonymous args follow, the result of list_length is actually
- one too large. This is harmless.)
-
- If PRETEND_OUTGOING_VARARGS_NAMED is set and STRICT_ARGUMENT_NAMING is
- zero, this machine will be able to place unnamed args that were
- passed in registers into the stack. So treat all args as named.
- This allows the insns emitting for a specific argument list to be
- independent of the function declaration.
+ First, do a raw count of the args for INIT_CUMULATIVE_ARGS. */
- If PRETEND_OUTGOING_VARARGS_NAMED is not set, we do not have any
- reliable way to pass unnamed args in registers, so we must force
- them into memory. */
-
- if ((STRICT_ARGUMENT_NAMING
- || ! PRETEND_OUTGOING_VARARGS_NAMED)
- && type_arg_types != 0)
+ if (type_arg_types != 0)
n_named_args
= (list_length (type_arg_types)
- /* Don't include the last named arg. */
- - (STRICT_ARGUMENT_NAMING ? 0 : 1)
/* Count the struct value address, if it is passed as a parm. */
+ structure_value_addr_parm);
else
/* Start updating where the next arg would go.
On some machines (such as the PA) indirect calls have a different
- calling convention than normal calls. The last argument in
+ calling convention than normal calls. The fourth argument in
INIT_CUMULATIVE_ARGS tells the backend if this is an indirect call
or not. */
- INIT_CUMULATIVE_ARGS (args_so_far, funtype, NULL_RTX, fndecl);
+ INIT_CUMULATIVE_ARGS (args_so_far, funtype, NULL_RTX, fndecl, n_named_args);
+
+ /* Now possibly adjust the number of named args.
+ Normally, don't include the last named arg if anonymous args follow.
+ We do include the last named arg if
+ targetm.calls.strict_argument_naming() returns nonzero.
+ (If no anonymous args follow, the result of list_length is actually
+ one too large. This is harmless.)
+
+ If targetm.calls.pretend_outgoing_varargs_named() returns
+ nonzero, and targetm.calls.strict_argument_naming() returns zero,
+ this machine will be able to place unnamed args that were passed
+ in registers into the stack. So treat all args as named. This
+ allows the insns emitting for a specific argument list to be
+ independent of the function declaration.
+
+ If targetm.calls.pretend_outgoing_varargs_named() returns zero,
+ we do not have any reliable way to pass unnamed args in
+ registers, so we must force them into memory. */
+
+ if (type_arg_types != 0
+ && targetm.calls.strict_argument_naming (&args_so_far))
+ ;
+ else if (type_arg_types != 0
+ && ! targetm.calls.pretend_outgoing_varargs_named (&args_so_far))
+ /* Don't include the last named arg. */
+ --n_named_args;
+ else
+ /* Treat all args as named. */
+ n_named_args = num_actuals;
/* Make a vector to hold all the information about each arg. */
- args = (struct arg_data *) alloca (num_actuals * sizeof (struct arg_data));
- memset ((char *) args, 0, num_actuals * sizeof (struct arg_data));
+ args = alloca (num_actuals * sizeof (struct arg_data));
+ memset (args, 0, num_actuals * sizeof (struct arg_data));
/* Build up entries in the ARGS array, compute the size of the
arguments into ARGS_SIZE, etc. */
n_named_args, actparms, fndecl,
&args_so_far, reg_parm_stack_space,
&old_stack_level, &old_pending_adj,
- &must_preallocate, &flags);
+ &must_preallocate, &flags,
+ &try_tail_call, CALL_FROM_THUNK_P (exp));
if (args_size.var)
{
|| (!ACCUMULATE_OUTGOING_ARGS && args_size.constant)))
structure_value_addr = copy_to_reg (structure_value_addr);
- /* Tail calls can make things harder to debug, and we're traditionally
+ /* Tail calls can make things harder to debug, and we've traditionally
pushed these optimizations into -O2. Don't try if we're already
expanding a call, as that means we're an argument. Don't try if
there's cleanups, as we know there's code to follow the call.
finished with regular parsing. Which means that some of the
machinery we use to generate tail-calls is no longer in place.
This is most often true of sjlj-exceptions, which we couldn't
- tail-call to anyway. */
+ tail-call to anyway.
+ If current_nesting_level () == 0, we're being called after
+ the function body has been expanded. This can happen when
+ setting up trampolines in expand_function_end. */
if (currently_expanding_call++ != 0
|| !flag_optimize_sibling_calls
|| !rtx_equal_function_value_matters
- || any_pending_cleanups (1)
- || args_size.var)
- try_tail_call = try_tail_recursion = 0;
-
- /* Tail recursion fails, when we are not dealing with recursive calls. */
- if (!try_tail_recursion
- || TREE_CODE (addr) != ADDR_EXPR
- || TREE_OPERAND (addr, 0) != current_function_decl)
- try_tail_recursion = 0;
+ || current_nesting_level () == 0
+ || args_size.var
+ || lookup_stmt_eh_region (exp) >= 0)
+ try_tail_call = 0;
/* Rest of purposes for tail call optimizations to fail. */
if (
|| structure_value_addr != NULL_RTX
/* Check whether the target is able to optimize the call
into a sibcall. */
- || !(*targetm.function_ok_for_sibcall) (fndecl, exp)
+ || !targetm.function_ok_for_sibcall (fndecl, exp)
/* Functions that do not return exactly once may not be sibcall
optimized. */
|| (flags & (ECF_RETURNS_TWICE | ECF_LONGJMP | ECF_NORETURN))
!= RETURN_POPS_ARGS (current_function_decl,
TREE_TYPE (current_function_decl),
current_function_args_size))
- || !(*lang_hooks.decls.ok_for_sibcall) (fndecl))
+ || !lang_hooks.decls.ok_for_sibcall (fndecl))
try_tail_call = 0;
- if (try_tail_call || try_tail_recursion)
+ if (try_tail_call)
{
int end, inc;
actparms = NULL_TREE;
for (; i != end; i += inc)
{
args[i].tree_value = fix_unsafe_tree (args[i].tree_value);
- /* We need to build actparms for optimize_tail_recursion. We can
- safely trash away TREE_PURPOSE, since it is unused by this
- function. */
- if (try_tail_recursion)
- actparms = tree_cons (NULL_TREE, args[i].tree_value, actparms);
}
/* Do the same for the function address if it is an expression. */
if (!fndecl)
addr = fix_unsafe_tree (addr);
- /* Expanding one of those dangerous arguments could have added
- cleanups, but otherwise give it a whirl. */
- if (any_pending_cleanups (1))
- try_tail_call = try_tail_recursion = 0;
- }
-
- /* Generate a tail recursion sequence when calling ourselves. */
-
- if (try_tail_recursion)
- {
- /* We want to emit any pending stack adjustments before the tail
- recursion "call". That way we know any adjustment after the tail
- recursion call can be ignored if we indeed use the tail recursion
- call expansion. */
- int save_pending_stack_adjust = pending_stack_adjust;
- int save_stack_pointer_delta = stack_pointer_delta;
-
- /* Emit any queued insns now; otherwise they would end up in
- only one of the alternates. */
- emit_queue ();
-
- /* Use a new sequence to hold any RTL we generate. We do not even
- know if we will use this RTL yet. The final decision can not be
- made until after RTL generation for the entire function is
- complete. */
- start_sequence ();
- /* If expanding any of the arguments creates cleanups, we can't
- do a tailcall. So, we'll need to pop the pending cleanups
- list. If, however, all goes well, and there are no cleanups
- then the call to expand_start_target_temps will have no
- effect. */
- expand_start_target_temps ();
- if (optimize_tail_recursion (actparms, get_last_insn ()))
- {
- if (any_pending_cleanups (1))
- try_tail_call = try_tail_recursion = 0;
- else
- tail_recursion_insns = get_insns ();
- }
- expand_end_target_temps ();
- end_sequence ();
-
- /* Restore the original pending stack adjustment for the sibling and
- normal call cases below. */
- pending_stack_adjust = save_pending_stack_adjust;
- stack_pointer_delta = save_stack_pointer_delta;
}
- if (profile_arc_flag && (flags & ECF_FORK_OR_EXEC))
- {
- /* A fork duplicates the profile information, and an exec discards
- it. We can't rely on fork/exec to be paired. So write out the
- profile information we have gathered so far, and clear it. */
- /* ??? When Linux's __clone is called with CLONE_VM set, profiling
- is subject to race conditions, just as with multithreaded
- programs. */
-
- emit_library_call (gcov_flush_libfunc, LCT_ALWAYS_RETURN, VOIDmode, 0);
- }
/* Ensure current function's preferred stack boundary is at least
what we need. We don't have to increase alignment for recursive
preferred_unit_stack_boundary = preferred_stack_boundary / BITS_PER_UNIT;
- function_call_count++;
-
/* We want to make two insn chains; one for a sibling call, the other
for a normal call. We will select one of the two chains after
initial RTL generation is complete. */
int sibcall_failure = 0;
/* We want to emit any pending stack adjustments before the tail
recursion "call". That way we know any adjustment after the tail
- recursion call can be ignored if we indeed use the tail recursion
+ recursion call can be ignored if we indeed use the tail
call expansion. */
int save_pending_stack_adjust = 0;
int save_stack_pointer_delta = 0;
if (pass == 0)
{
- /* Emit any queued insns now; otherwise they would end up in
- only one of the alternates. */
- emit_queue ();
-
/* State variables we need to save and restore between
iterations. */
save_pending_stack_adjust = pending_stack_adjust;
if (pass && (flags & ECF_LIBCALL_BLOCK))
NO_DEFER_POP;
-#ifdef FINAL_REG_PARM_STACK_SPACE
- reg_parm_stack_space = FINAL_REG_PARM_STACK_SPACE (args_size.constant,
- args_size.var);
-#endif
/* Precompute any arguments as needed. */
if (pass)
precompute_arguments (flags, num_actuals, args);
highest_outgoing_arg_in_use = MAX (initial_highest_arg_in_use,
needed);
#endif
- stack_usage_map
- = (char *) alloca (highest_outgoing_arg_in_use);
+ stack_usage_map = alloca (highest_outgoing_arg_in_use);
if (initial_highest_arg_in_use)
memcpy (stack_usage_map, initial_stack_usage_map,
= stack_arg_under_construction;
stack_arg_under_construction = 0;
/* Make a new map for the new argument list. */
- stack_usage_map = (char *)
- alloca (highest_outgoing_arg_in_use);
+ stack_usage_map = alloca (highest_outgoing_arg_in_use);
memset (stack_usage_map, 0, highest_outgoing_arg_in_use);
highest_outgoing_arg_in_use = 0;
}
break;
}
}
-
+
compute_argument_addresses (args, argblock, num_actuals);
/* If we push args individually in reverse order, perform stack alignment
once we have started filling any specific hard regs. */
precompute_register_parameters (num_actuals, args, ®_parm_seen);
+ if (TREE_OPERAND (exp, 2))
+ static_chain_value = expand_expr (TREE_OPERAND (exp, 2),
+ NULL_RTX, VOIDmode, 0);
+ else
+ static_chain_value = 0;
+
#ifdef REG_PARM_STACK_SPACE
/* Save the fixed argument area if it's part of the caller's frame and
is clobbered by argument setup for this call. */
&& check_sibcall_argument_overlap (before_arg,
&args[i], 1)))
sibcall_failure = 1;
+
+ if (flags & ECF_CONST
+ && args[i].stack
+ && args[i].value == args[i].stack)
+ call_fusage = gen_rtx_EXPR_LIST (VOIDmode,
+ gen_rtx_USE (VOIDmode,
+ args[i].value),
+ call_fusage);
}
/* If we have a parm that is passed in registers but not in memory
structure value. */
if (pass != 0 && structure_value_addr && ! structure_value_addr_parm)
{
- emit_move_insn (struct_value_rtx,
+ structure_value_addr
+ = convert_memory_address (Pmode, structure_value_addr);
+ emit_move_insn (struct_value,
force_reg (Pmode,
force_operand (structure_value_addr,
NULL_RTX)));
- if (GET_CODE (struct_value_rtx) == REG)
- use_reg (&call_fusage, struct_value_rtx);
+ if (REG_P (struct_value))
+ use_reg (&call_fusage, struct_value);
}
- funexp = prepare_call_address (funexp, fndecl, &call_fusage,
- reg_parm_seen, pass == 0);
+ funexp = prepare_call_address (funexp, static_chain_value,
+ &call_fusage, reg_parm_seen, pass == 0);
load_register_parameters (args, num_actuals, &call_fusage, flags,
pass == 0, &sibcall_failure);
- /* Perform postincrements before actually calling the function. */
- emit_queue ();
-
/* Save a pointer to the last insn before the call, so that we can
later safely search backwards to find the CALL_INSN. */
before_call = get_last_insn ();
abort ();
/* Generate the actual call instruction. */
- emit_call_1 (funexp, fndecl, funtype, unadjusted_args_size,
+ emit_call_1 (funexp, exp, fndecl, funtype, unadjusted_args_size,
adjusted_args_size.constant, struct_value_size,
next_arg_reg, valreg, old_inhibit_defer_pop, call_fusage,
flags, & args_so_far);
if (pass && (flags & ECF_LIBCALL_BLOCK))
{
rtx insns;
+ rtx insn;
+ bool failed = valreg == 0 || GET_CODE (valreg) == PARALLEL;
+
+ insns = get_insns ();
- if (valreg == 0 || GET_CODE (valreg) == PARALLEL)
+ /* Expansion of block moves possibly introduced a loop that may
+ not appear inside libcall block. */
+ for (insn = insns; insn; insn = NEXT_INSN (insn))
+ if (JUMP_P (insn))
+ failed = true;
+
+ if (failed)
{
- insns = get_insns ();
end_sequence ();
emit_insn (insns);
}
mark_reg_pointer (temp,
TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp))));
- /* Construct an "equal form" for the value which mentions all the
- arguments in order as well as the function name. */
- for (i = 0; i < num_actuals; i++)
- note = gen_rtx_EXPR_LIST (VOIDmode,
- args[i].initial_value, note);
- note = gen_rtx_EXPR_LIST (VOIDmode, funexp, note);
-
- insns = get_insns ();
end_sequence ();
-
- if (flags & ECF_PURE)
- note = gen_rtx_EXPR_LIST (VOIDmode,
+ if (flag_unsafe_math_optimizations
+ && fndecl
+ && DECL_BUILT_IN (fndecl)
+ && (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_SQRT
+ || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_SQRTF
+ || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_SQRTL))
+ note = gen_rtx_fmt_e (SQRT,
+ GET_MODE (temp),
+ args[0].initial_value);
+ else
+ {
+ /* Construct an "equal form" for the value which
+ mentions all the arguments in order as well as
+ the function name. */
+ for (i = 0; i < num_actuals; i++)
+ note = gen_rtx_EXPR_LIST (VOIDmode,
+ args[i].initial_value, note);
+ note = gen_rtx_EXPR_LIST (VOIDmode, funexp, note);
+
+ if (flags & ECF_PURE)
+ note = gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_USE (VOIDmode,
gen_rtx_MEM (BLKmode,
gen_rtx_SCRATCH (VOIDmode))),
note);
-
+ }
emit_libcall_block (insns, temp, valreg, note);
valreg = temp;
than just a CALL_INSN above, so we must search for it here. */
rtx last = get_last_insn ();
- while (GET_CODE (last) != CALL_INSN)
+ while (!CALL_P (last))
{
last = PREV_INSN (last);
/* There was no CALL_INSN? */
}
emit_barrier_after (last);
+
+ /* Stack adjustments after a noreturn call are dead code.
+ However when NO_DEFER_POP is in effect, we must preserve
+ stack_pointer_delta. */
+ if (inhibit_defer_pop == 0)
+ {
+ stack_pointer_delta = old_stack_allocated;
+ pending_stack_adjust = 0;
+ }
}
if (flags & ECF_LONGJMP)
/* If value type not void, return an rtx for the value. */
- /* If there are cleanups to be called, don't use a hard reg as target.
- We need to double check this and see if it matters anymore. */
- if (any_pending_cleanups (1))
- {
- if (target && REG_P (target)
- && REGNO (target) < FIRST_PSEUDO_REGISTER)
- target = 0;
- sibcall_failure = 1;
- }
-
if (TYPE_MODE (TREE_TYPE (exp)) == VOIDmode
|| ignore)
target = const0_rtx;
else if (structure_value_addr)
{
- if (target == 0 || GET_CODE (target) != MEM)
+ if (target == 0 || !MEM_P (target))
{
target
= gen_rtx_MEM (TYPE_MODE (TREE_TYPE (exp)),
}
if (! rtx_equal_p (target, valreg))
- emit_group_store (target, valreg,
+ emit_group_store (target, valreg, TREE_TYPE (exp),
int_size_in_bytes (TREE_TYPE (exp)));
/* We can not support sibling calls for this case. */
/* If we are setting a MEM, this code must be executed. Since it is
emitted after the call insn, sibcall optimization cannot be
performed in that case. */
- if (GET_CODE (target) == MEM)
+ if (MEM_P (target))
sibcall_failure = 1;
}
else if (TYPE_MODE (TREE_TYPE (exp)) == BLKmode)
sibcall_failure = 1;
}
else
- target = copy_to_reg (valreg);
+ {
+ if (shift_returned_value (TREE_TYPE (exp), &valreg))
+ sibcall_failure = 1;
-#ifdef PROMOTE_FUNCTION_RETURN
+ target = copy_to_reg (valreg);
+ }
+
+ if (targetm.calls.promote_function_return(funtype))
+ {
/* If we promoted this return value, make the proper SUBREG. TARGET
might be const0_rtx here, so be careful. */
- if (GET_CODE (target) == REG
+ if (REG_P (target)
&& TYPE_MODE (TREE_TYPE (exp)) != BLKmode
&& GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp)))
{
tree type = TREE_TYPE (exp);
- int unsignedp = TREE_UNSIGNED (type);
+ int unsignedp = TYPE_UNSIGNED (type);
int offset = 0;
/* If we don't promote as expected, something is wrong. */
SUBREG_PROMOTED_VAR_P (target) = 1;
SUBREG_PROMOTED_UNSIGNED_SET (target, unsignedp);
}
-#endif
+ }
/* If size of args is variable or this was a constructor call for a stack
argument, restore saved stack-pointer value. */
emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX);
stack_pointer_delta = old_stack_pointer_delta;
pending_stack_adjust = old_pending_adj;
+ old_stack_allocated = stack_pointer_delta - pending_stack_adjust;
stack_arg_under_construction = old_stack_arg_under_construction;
highest_outgoing_arg_in_use = initial_highest_arg_in_use;
stack_usage_map = initial_stack_usage_map;
Check for the handler slots since we might not have a save area
for non-local gotos. */
- if ((flags & ECF_MAY_BE_ALLOCA) && nonlocal_goto_handler_slots != 0)
- emit_stack_save (SAVE_NONLOCAL, &nonlocal_goto_stack_level, NULL_RTX);
+ if ((flags & ECF_MAY_BE_ALLOCA) && cfun->nonlocal_goto_save_area != 0)
+ update_nonlocal_goto_save_area ();
/* Free up storage we no longer need. */
for (i = 0; i < num_actuals; ++i)
by at least the delay slot scheduling pass. We do this now instead of
adding to call_fusage before the call to emit_call_1 because TARGET
may be modified in the meantime. */
- if (structure_value_addr != 0 && target != 0
- && GET_CODE (target) == MEM && RTX_UNCHANGING_P (target))
+ if (structure_value_addr != 0 && target != 0
+ && MEM_P (target) && RTX_UNCHANGING_P (target))
add_function_usage_to
(last_call_insn (),
gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_CLOBBER (VOIDmode, target),
NULL_RTX));
-
+
insns = get_insns ();
end_sequence ();
normal_call_insns = insns;
/* Verify that we've deallocated all the stack we used. */
- if (old_stack_allocated !=
- stack_pointer_delta - pending_stack_adjust)
+ if (! (flags & (ECF_NORETURN | ECF_LONGJMP))
+ && old_stack_allocated != stack_pointer_delta
+ - pending_stack_adjust)
abort ();
}
zero out the sequence. */
if (sibcall_failure)
tail_call_insns = NULL_RTX;
+ else
+ break;
}
- /* The function optimize_sibling_and_tail_recursive_calls doesn't
- handle CALL_PLACEHOLDERs inside other CALL_PLACEHOLDERs. This
- can happen if the arguments to this function call an inline
- function who's expansion contains another CALL_PLACEHOLDER.
-
- If there are any C_Ps in any of these sequences, replace them
- with their normal call. */
-
- for (insn = normal_call_insns; insn; insn = NEXT_INSN (insn))
- if (GET_CODE (insn) == CALL_INSN
- && GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
- replace_call_placeholder (insn, sibcall_use_normal);
-
- for (insn = tail_call_insns; insn; insn = NEXT_INSN (insn))
- if (GET_CODE (insn) == CALL_INSN
- && GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
- replace_call_placeholder (insn, sibcall_use_normal);
-
- for (insn = tail_recursion_insns; insn; insn = NEXT_INSN (insn))
- if (GET_CODE (insn) == CALL_INSN
- && GET_CODE (PATTERN (insn)) == CALL_PLACEHOLDER)
- replace_call_placeholder (insn, sibcall_use_normal);
-
- /* If this was a potential tail recursion site, then emit a
- CALL_PLACEHOLDER with the normal and the tail recursion streams.
- One of them will be selected later. */
- if (tail_recursion_insns || tail_call_insns)
+ /* If tail call production succeeded, we need to remove REG_EQUIV notes on
+ arguments too, as argument area is now clobbered by the call. */
+ if (tail_call_insns)
{
- /* The tail recursion label must be kept around. We could expose
- its use in the CALL_PLACEHOLDER, but that creates unwanted edges
- and makes determining true tail recursion sites difficult.
-
- So we set LABEL_PRESERVE_P here, then clear it when we select
- one of the call sequences after rtl generation is complete. */
- if (tail_recursion_insns)
- LABEL_PRESERVE_P (tail_recursion_label) = 1;
- emit_call_insn (gen_rtx_CALL_PLACEHOLDER (VOIDmode, normal_call_insns,
- tail_call_insns,
- tail_recursion_insns,
- tail_recursion_label));
+ emit_insn (tail_call_insns);
+ cfun->tail_call_emit = true;
}
else
emit_insn (normal_call_insns);
if (flags & ECF_SP_DEPRESSED)
{
clear_pending_stack_adjust ();
- emit_insn (gen_rtx (CLOBBER, VOIDmode, stack_pointer_rtx));
+ emit_insn (gen_rtx_CLOBBER (VOIDmode, stack_pointer_rtx));
emit_move_insn (virtual_stack_dynamic_rtx, stack_pointer_rtx);
- save_stack_pointer ();
}
return target;
}
+/* A sibling call sequence invalidates any REG_EQUIV notes made for
+ this function's incoming arguments.
+
+ At the start of RTL generation we know the only REG_EQUIV notes
+ in the rtl chain are those for incoming arguments, so we can safely
+ flush any REG_EQUIV note.
+
+ This is (slight) overkill. We could keep track of the highest
+ argument we clobber and be more selective in removing notes, but it
+ does not seem to be worth the effort. */
+void
+fixup_tail_calls (void)
+{
+ rtx insn;
+ tree arg;
+
+ purge_reg_equiv_notes ();
+
+ /* A sibling call sequence also may invalidate RTX_UNCHANGING_P
+ flag of some incoming arguments MEM RTLs, because it can write into
+ those slots. We clear all those bits now.
+
+ This is (slight) overkill, we could keep track of which arguments
+ we actually write into. */
+ for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
+ {
+ if (INSN_P (insn))
+ purge_mem_unchanging_flag (PATTERN (insn));
+ }
+
+ /* Similarly, invalidate RTX_UNCHANGING_P for any incoming
+ arguments passed in registers. */
+ for (arg = DECL_ARGUMENTS (current_function_decl);
+ arg;
+ arg = TREE_CHAIN (arg))
+ {
+ if (REG_P (DECL_RTL (arg)))
+ RTX_UNCHANGING_P (DECL_RTL (arg)) = false;
+ }
+}
+
/* Traverse an argument list in VALUES and expand all complex
arguments into their components. */
tree
{
tree p;
+ /* Before allocating memory, check for the common case of no complex. */
+ for (p = values; p; p = TREE_CHAIN (p))
+ {
+ tree type = TREE_TYPE (TREE_VALUE (p));
+ if (type && TREE_CODE (type) == COMPLEX_TYPE
+ && targetm.calls.split_complex_arg (type))
+ goto found;
+ }
+ return values;
+
+ found:
values = copy_list (values);
for (p = values; p; p = TREE_CHAIN (p))
if (!complex_type)
continue;
- if (TREE_CODE (complex_type) == COMPLEX_TYPE)
+ if (TREE_CODE (complex_type) == COMPLEX_TYPE
+ && targetm.calls.split_complex_arg (complex_type))
{
tree subtype;
tree real, imag, next;
{
tree p;
+ /* Before allocating memory, check for the common case of no complex. */
+ for (p = types; p; p = TREE_CHAIN (p))
+ {
+ tree type = TREE_VALUE (p);
+ if (TREE_CODE (type) == COMPLEX_TYPE
+ && targetm.calls.split_complex_arg (type))
+ goto found;
+ }
+ return types;
+
+ found:
types = copy_list (types);
for (p = types; p; p = TREE_CHAIN (p))
{
tree complex_type = TREE_VALUE (p);
- if (TREE_CODE (complex_type) == COMPLEX_TYPE)
+ if (TREE_CODE (complex_type) == COMPLEX_TYPE
+ && targetm.calls.split_complex_arg (complex_type))
{
tree next, imag;
parameters are documented in the emit_library_call function below. */
static rtx
-emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
- int retval;
- rtx orgfun;
- rtx value;
- enum libcall_type fn_type;
- enum machine_mode outmode;
- int nargs;
- va_list p;
+emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
+ enum libcall_type fn_type,
+ enum machine_mode outmode, int nargs, va_list p)
{
/* Total size in bytes of all the stack-parms scanned so far. */
struct args_size args_size;
int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
char *initial_stack_usage_map = stack_usage_map;
+ rtx struct_value = targetm.calls.struct_value_rtx (0, 0);
+
#ifdef REG_PARM_STACK_SPACE
-#ifdef MAYBE_REG_PARM_STACK_SPACE
- reg_parm_stack_space = MAYBE_REG_PARM_STACK_SPACE;
-#else
reg_parm_stack_space = REG_PARM_STACK_SPACE ((tree) 0);
#endif
-#endif
/* By default, library functions can not throw. */
flags = ECF_NOTHROW;
decide where in memory it should come back. */
if (outmode != VOIDmode)
{
- tfom = (*lang_hooks.types.type_for_mode) (outmode, 0);
- if (aggregate_value_p (tfom))
+ tfom = lang_hooks.types.type_for_mode (outmode, 0);
+ if (aggregate_value_p (tfom, 0))
{
#ifdef PCC_STATIC_STRUCT_RETURN
rtx pointer_reg
value = gen_reg_rtx (outmode);
#else /* not PCC_STATIC_STRUCT_RETURN */
struct_value_size = GET_MODE_SIZE (outmode);
- if (value != 0 && GET_CODE (value) == MEM)
+ if (value != 0 && MEM_P (value))
mem_value = value;
else
mem_value = assign_temp (tfom, 0, 1, 1);
of the full argument passing conventions to limit complexity here since
library functions shouldn't have many args. */
- argvec = (struct arg *) alloca ((nargs + 1) * sizeof (struct arg));
- memset ((char *) argvec, 0, (nargs + 1) * sizeof (struct arg));
+ argvec = alloca ((nargs + 1) * sizeof (struct arg));
+ memset (argvec, 0, (nargs + 1) * sizeof (struct arg));
#ifdef INIT_CUMULATIVE_LIBCALL_ARGS
INIT_CUMULATIVE_LIBCALL_ARGS (args_so_far, outmode, fun);
#else
- INIT_CUMULATIVE_ARGS (args_so_far, NULL_TREE, fun, 0);
+ INIT_CUMULATIVE_ARGS (args_so_far, NULL_TREE, fun, 0, nargs);
#endif
args_size.constant = 0;
/* If there's a structure value address to be passed,
either pass it in the special place, or pass it as an extra argument. */
- if (mem_value && struct_value_rtx == 0 && ! pcc_struct_value)
+ if (mem_value && struct_value == 0 && ! pcc_struct_value)
{
rtx addr = XEXP (mem_value, 0);
nargs++;
/* Make sure it is a reasonable operand for a move or push insn. */
- if (GET_CODE (addr) != REG && GET_CODE (addr) != MEM
+ if (!REG_P (addr) && !MEM_P (addr)
&& ! (CONSTANT_P (addr) && LEGITIMATE_CONSTANT_P (addr)))
addr = force_operand (addr, NULL_RTX);
argvec[count].partial = 0;
argvec[count].reg = FUNCTION_ARG (args_so_far, Pmode, NULL_TREE, 1);
-#ifdef FUNCTION_ARG_PARTIAL_NREGS
if (FUNCTION_ARG_PARTIAL_NREGS (args_so_far, Pmode, NULL_TREE, 1))
abort ();
-#endif
locate_and_pad_parm (Pmode, NULL_TREE,
#ifdef STACK_PARMS_IN_REG_PARM_AREA
|| (GET_MODE (val) != mode && GET_MODE (val) != VOIDmode))
abort ();
- /* On some machines, there's no way to pass a float to a library fcn.
- Pass it as a double instead. */
-#ifdef LIBGCC_NEEDS_DOUBLE
- if (LIBGCC_NEEDS_DOUBLE && mode == SFmode)
- val = convert_modes (DFmode, SFmode, val, 0), mode = DFmode;
-#endif
-
- /* There's no need to call protect_from_queue, because
- either emit_move_insn or emit_push_insn will do that. */
-
/* Make sure it is a reasonable operand for a move or push insn. */
- if (GET_CODE (val) != REG && GET_CODE (val) != MEM
+ if (!REG_P (val) && !MEM_P (val)
&& ! (CONSTANT_P (val) && LEGITIMATE_CONSTANT_P (val)))
val = force_operand (val, NULL_RTX);
-#ifdef FUNCTION_ARG_PASS_BY_REFERENCE
- if (FUNCTION_ARG_PASS_BY_REFERENCE (args_so_far, mode, NULL_TREE, 1))
+ if (pass_by_reference (&args_so_far, mode, NULL_TREE, 1))
{
rtx slot;
- int must_copy = 1
-#ifdef FUNCTION_ARG_CALLEE_COPIES
- && ! FUNCTION_ARG_CALLEE_COPIES (args_so_far, mode,
- NULL_TREE, 1)
-#endif
- ;
+ int must_copy = ! FUNCTION_ARG_CALLEE_COPIES (args_so_far, mode,
+ NULL_TREE, 1);
/* loop.c won't look at CALL_INSN_FUNCTION_USAGE of const/pure
functions, so we have to pretend this isn't such a function. */
slot = val;
else if (must_copy)
{
- slot = assign_temp ((*lang_hooks.types.type_for_mode) (mode, 0),
+ slot = assign_temp (lang_hooks.types.type_for_mode (mode, 0),
0, 1, 1);
emit_move_insn (slot, val);
}
else
{
- tree type = (*lang_hooks.types.type_for_mode) (mode, 0);
+ tree type = lang_hooks.types.type_for_mode (mode, 0);
slot
= gen_rtx_MEM (mode,
mode = Pmode;
val = force_operand (XEXP (slot, 0), NULL_RTX);
}
-#endif
argvec[count].value = val;
argvec[count].mode = mode;
argvec[count].reg = FUNCTION_ARG (args_so_far, mode, NULL_TREE, 1);
-#ifdef FUNCTION_ARG_PARTIAL_NREGS
argvec[count].partial
= FUNCTION_ARG_PARTIAL_NREGS (args_so_far, mode, NULL_TREE, 1);
-#else
- argvec[count].partial = 0;
-#endif
locate_and_pad_parm (mode, NULL_TREE,
#ifdef STACK_PARMS_IN_REG_PARM_AREA
FUNCTION_ARG_ADVANCE (args_so_far, mode, (tree) 0, 1);
}
-#ifdef FINAL_REG_PARM_STACK_SPACE
- reg_parm_stack_space = FINAL_REG_PARM_STACK_SPACE (args_size.constant,
- args_size.var);
-#endif
/* If this machine requires an external definition for library
functions, write one out. */
assemble_external_libcall (fun);
highest_outgoing_arg_in_use = MAX (initial_highest_arg_in_use,
needed);
#endif
- stack_usage_map = (char *) alloca (highest_outgoing_arg_in_use);
+ stack_usage_map = alloca (highest_outgoing_arg_in_use);
if (initial_highest_arg_in_use)
memcpy (stack_usage_map, initial_stack_usage_map,
argvec[argnum].locate.offset.constant);
rtx stack_area
= gen_rtx_MEM (save_mode, memory_address (save_mode, adr));
- argvec[argnum].save_area = gen_reg_rtx (save_mode);
- emit_move_insn (argvec[argnum].save_area, stack_area);
+ if (save_mode == BLKmode)
+ {
+ argvec[argnum].save_area
+ = assign_stack_temp (BLKmode,
+ argvec[argnum].locate.size.constant,
+ 0);
+
+ emit_block_move (validize_mem (argvec[argnum].save_area),
+ stack_area,
+ GEN_INT (argvec[argnum].locate.size.constant),
+ BLOCK_OP_CALL_PARM);
+ }
+ else
+ {
+ argvec[argnum].save_area = gen_reg_rtx (save_mode);
+
+ emit_move_insn (argvec[argnum].save_area, stack_area);
+ }
}
}
else
argnum = 0;
- fun = prepare_call_address (fun, NULL_TREE, &call_fusage, 0, 0);
+ fun = prepare_call_address (fun, NULL, &call_fusage, 0, 0);
/* Now load any reg parms into their regs. */
are to be pushed. */
for (count = 0; count < nargs; count++, argnum += inc)
{
+ enum machine_mode mode = argvec[argnum].mode;
rtx val = argvec[argnum].value;
rtx reg = argvec[argnum].reg;
int partial = argvec[argnum].partial;
/* Handle calls that pass values in multiple non-contiguous
locations. The PA64 has examples of this for library calls. */
if (reg != 0 && GET_CODE (reg) == PARALLEL)
- emit_group_load (reg, val, GET_MODE_SIZE (GET_MODE (val)));
+ emit_group_load (reg, val, NULL_TREE, GET_MODE_SIZE (mode));
else if (reg != 0 && partial == 0)
emit_move_insn (reg, val);
}
/* Pass the function the address in which to return a structure value. */
- if (mem_value != 0 && struct_value_rtx != 0 && ! pcc_struct_value)
+ if (mem_value != 0 && struct_value != 0 && ! pcc_struct_value)
{
- emit_move_insn (struct_value_rtx,
+ emit_move_insn (struct_value,
force_reg (Pmode,
force_operand (XEXP (mem_value, 0),
NULL_RTX)));
- if (GET_CODE (struct_value_rtx) == REG)
- use_reg (&call_fusage, struct_value_rtx);
+ if (REG_P (struct_value))
+ use_reg (&call_fusage, struct_value);
}
/* Don't allow popping to be deferred, since then
always signed. We also assume that the list of arguments passed has
no impact, so we pretend it is unknown. */
- emit_call_1 (fun,
+ emit_call_1 (fun, NULL,
get_identifier (XSTR (orgfun, 0)),
build_function_type (tfom, NULL_TREE),
original_args_size.constant, args_size.constant,
just a CALL_INSN above, so we must search for it here. */
rtx last = get_last_insn ();
- while (GET_CODE (last) != CALL_INSN)
+ while (!CALL_P (last))
{
last = PREV_INSN (last);
/* There was no CALL_INSN? */
if (GET_CODE (valreg) == PARALLEL)
{
temp = gen_reg_rtx (outmode);
- emit_group_store (temp, valreg, outmode);
+ emit_group_store (temp, valreg, NULL_TREE,
+ GET_MODE_SIZE (outmode));
valreg = temp;
}
{
if (value == 0)
value = gen_reg_rtx (outmode);
- emit_group_store (value, valreg, outmode);
+ emit_group_store (value, valreg, NULL_TREE, GET_MODE_SIZE (outmode));
}
else if (value != 0)
emit_move_insn (value, valreg);
rtx stack_area = gen_rtx_MEM (save_mode,
memory_address (save_mode, adr));
- emit_move_insn (stack_area, argvec[count].save_area);
+ if (save_mode == BLKmode)
+ emit_block_move (stack_area,
+ validize_mem (argvec[count].save_area),
+ GEN_INT (argvec[count].locate.size.constant),
+ BLOCK_OP_CALL_PARM);
+ else
+ emit_move_insn (stack_area, argvec[count].save_area);
}
highest_outgoing_arg_in_use = initial_highest_arg_in_use;
for a value of mode OUTMODE,
with NARGS different arguments, passed as alternating rtx values
and machine_modes to convert them to.
- The rtx values should have been passed through protect_from_queue already.
FN_TYPE should be LCT_NORMAL for `normal' calls, LCT_CONST for `const'
calls, LCT_PURE for `pure' calls, LCT_CONST_MAKE_BLOCK for `const' calls
enum machine_mode outmode, int nargs, ...)
{
va_list p;
-
+
va_start (p, nargs);
emit_library_call_value_1 (0, orgfun, NULL_RTX, fn_type, outmode, nargs, p);
va_end (p);
{
rtx result;
va_list p;
-
+
va_start (p, nargs);
result = emit_library_call_value_1 (1, orgfun, value, fn_type, outmode,
nargs, p);
zero otherwise. */
static int
-store_one_arg (arg, argblock, flags, variable_size, reg_parm_stack_space)
- struct arg_data *arg;
- rtx argblock;
- int flags;
- int variable_size ATTRIBUTE_UNUSED;
- int reg_parm_stack_space;
+store_one_arg (struct arg_data *arg, rtx argblock, int flags,
+ int variable_size ATTRIBUTE_UNUSED, int reg_parm_stack_space)
{
tree pval = arg->tree_value;
rtx reg = 0;
/* This isn't already where we want it on the stack, so put it there.
This can either be done with push or copy insns. */
- emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), NULL_RTX,
+ emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), NULL_RTX,
PARM_BOUNDARY, partial, reg, used - size, argblock,
ARGS_SIZE_RTX (arg->locate.offset), reg_parm_stack_space,
ARGS_SIZE_RTX (arg->locate.alignment_pad));
{
/* PUSH_ROUNDING has no effect on us, because
emit_push_insn for BLKmode is careful to avoid it. */
- excess = (arg->locate.size.constant
- - int_size_in_bytes (TREE_TYPE (pval))
- + partial * UNITS_PER_WORD);
+ if (reg && GET_CODE (reg) == PARALLEL)
+ {
+ /* Use the size of the elt to compute excess. */
+ rtx elt = XEXP (XVECEXP (reg, 0, 0), 0);
+ excess = (arg->locate.size.constant
+ - int_size_in_bytes (TREE_TYPE (pval))
+ + partial * GET_MODE_SIZE (GET_MODE (elt)));
+ }
+ else
+ excess = (arg->locate.size.constant
+ - int_size_in_bytes (TREE_TYPE (pval))
+ + partial * UNITS_PER_WORD);
size_rtx = expand_expr (size_in_bytes (TREE_TYPE (pval)),
NULL_RTX, TYPE_MODE (sizetype), 0);
}
}
}
- if ((flags & ECF_SIBCALL) && GET_CODE (arg->value) == MEM)
+ if ((flags & ECF_SIBCALL) && MEM_P (arg->value))
{
/* emit_push_insn might not work properly if arg->value and
argblock + arg->locate.offset areas overlap. */
if (XEXP (x, 0) != current_function_internal_arg_pointer)
i = INTVAL (XEXP (XEXP (x, 0), 1));
- /* expand_call should ensure this */
+ /* expand_call should ensure this. */
if (arg->locate.offset.var || GET_CODE (size_rtx) != CONST_INT)
abort ();
be deferred during the rest of the arguments. */
NO_DEFER_POP;
- /* ANSI doesn't require a sequence point here,
- but PCC has one, so this will avoid some problems. */
- emit_queue ();
-
/* Free any temporary slots made in processing this argument. Show
that we might have taken the address of something and pushed that
as an operand. */
return sibcall_failure;
}
-/* Nonzero if we do not know how to pass TYPE solely in registers.
- We cannot do so in the following cases:
+/* Nonzero if we do not know how to pass TYPE solely in registers. */
+
+bool
+must_pass_in_stack_var_size (enum machine_mode mode ATTRIBUTE_UNUSED,
+ tree type)
+{
+ if (!type)
+ return false;
+
+ /* If the type has variable size... */
+ if (TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+ return true;
- - if the type has variable size
- - if the type is marked as addressable (it is required to be constructed
- into the stack)
- - if the padding and mode of the type is such that a copy into a register
- would put it into the wrong part of the register.
+ /* If the type is marked as addressable (it is required
+ to be constructed into the stack)... */
+ if (TREE_ADDRESSABLE (type))
+ return true;
- Which padding can't be supported depends on the byte endianness.
+ return false;
+}
- A value in a register is implicitly padded at the most significant end.
- On a big-endian machine, that is the lower end in memory.
- So a value padded in memory at the upper end can't go in a register.
- For a little-endian machine, the reverse is true. */
+/* Another version of the TARGET_MUST_PASS_IN_STACK hook. This one
+ takes trailing padding of a structure into account. */
+/* ??? Should be able to merge these two by examining BLOCK_REG_PADDING. */
bool
-default_must_pass_in_stack (mode, type)
- enum machine_mode mode;
- tree type;
+must_pass_in_stack_var_size_or_pad (enum machine_mode mode, tree type)
{
if (!type)
return false;
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