/* Convert function calls to rtl insns, for GNU C compiler.
- Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998
+ Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003 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 "sbitmap.h"
#include "langhooks.h"
#include "target.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
+#include "cgraph.h"
+#include "except.h"
#ifndef STACK_POINTER_OFFSET
#define STACK_POINTER_OFFSET 0
even though pass_on_stack is zero, just because FUNCTION_ARG says so.
pass_on_stack identifies arguments that *cannot* go in registers. */
int pass_on_stack;
- /* Offset of this argument from beginning of stack-args. */
- struct args_size offset;
- /* Similar, but offset to the start of the stack slot. Different from
- OFFSET if this arg pads downward. */
- struct args_size slot_offset;
- /* Size of this argument on the stack, rounded up for any padding it gets,
- parts of the argument passed in registers do not count.
- If REG_PARM_STACK_SPACE is defined, then register parms
- are counted here as well. */
- struct args_size size;
+ /* Some fields packaged up for locate_and_pad_parm. */
+ struct locate_and_pad_arg_data locate;
/* Location on the stack at which parameter should be stored. The store
has already been done if STACK == VALUE. */
rtx stack;
word-sized pseudos we made. */
rtx *aligned_regs;
int n_aligned_regs;
- /* The amount that the stack pointer needs to be adjusted to
- force alignment for the next argument. */
- struct args_size alignment_pad;
};
/* A vector of one char per byte of stack space. A byte if nonzero if
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 int calls_function (tree, int);
+static int calls_function_1 (tree, int);
+
+static void emit_call_1 (rtx, 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 *);
+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 rtx try_to_integrate (tree, tree, rtx, int, tree, rtx);
+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);
#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
static tree calls_function_save_exprs;
static int
-calls_function (exp, which)
- tree exp;
- int which;
+calls_function (tree exp, int which)
{
int val;
/* Recursive function to do the work of above function. */
static int
-calls_function_1 (exp, which)
- tree exp;
- int which;
+calls_function_1 (tree exp, int which)
{
int i;
enum tree_code code = TREE_CODE (exp);
break;
}
- /* Only expressions, references, and blocks can contain calls. */
- if (! IS_EXPR_CODE_CLASS (class) && class != 'r' && class != 'b')
+ /* Only expressions and blocks can contain calls. */
+ if (! IS_EXPR_CODE_CLASS (class) && class != 'b')
return 0;
for (i = 0; i < length; i++)
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, tree fndecl, rtx *call_fusage,
+ int reg_parm_seen, int sibcallp)
{
rtx static_chain_value = 0;
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 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. */
#endif
abort ();
- /* Find the CALL insn we just emitted. */
- for (call_insn = get_last_insn ();
- call_insn && GET_CODE (call_insn) != CALL_INSN;
- call_insn = PREV_INSN (call_insn))
- ;
-
- if (! call_insn)
- abort ();
+ /* Find the call we just emitted. */
+ call_insn = last_call_insn ();
/* Mark memory as used for "pure" function call. */
if (ecf_flags & ECF_PURE)
gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))),
call_fusage);
- /* Put the register usage information on the CALL. If there is already
- some usage information, put ours at the end. */
- if (CALL_INSN_FUNCTION_USAGE (call_insn))
- {
- rtx link;
-
- for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0;
- link = XEXP (link, 1))
- ;
-
- XEXP (link, 1) = call_fusage;
- }
- else
- CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage;
+ /* Put the register usage information there. */
+ add_function_usage_to (call_insn, call_fusage);
/* If this is a const call, then set the insn's unchanging bit. */
if (ecf_flags & (ECF_CONST | ECF_PURE))
if (ecf_flags & ECF_NOTHROW)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_EH_REGION, const0_rtx,
REG_NOTES (call_insn));
+ else
+ note_eh_region_may_contain_throw ();
if (ecf_flags & ECF_NORETURN)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_NORETURN, const0_rtx,
if the context of the call as a whole permits. */
inhibit_defer_pop = old_inhibit_defer_pop;
+ /* Don't bother cleaning up after a noreturn function. */
+ if (ecf_flags & (ECF_NORETURN | ECF_LONGJMP))
+ return;
+
if (n_popped > 0)
{
if (!already_popped)
Similarly set LONGJMP for if the function is in the longjmp family.
- Set MALLOC for any of the standard memory allocation functions which
- allocate from the heap.
-
Set MAY_BE_ALLOCA for any memory allocation function that might allocate
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)
&& 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;
|| ((tname[5] == 'p' || tname[5] == 'e')
&& tname[6] == '\0'))))
flags |= ECF_FORK_OR_EXEC;
-
- /* Do not add any more malloc-like functions to this list,
- instead mark them as malloc functions using the malloc attribute.
- Note, realloc is not suitable for attribute malloc since
- it may return the same address across multiple calls.
- C++ operator new is not suitable because it is not required
- to return a unique pointer; indeed, the standard placement new
- just returns its argument. */
- else if (TYPE_MODE (TREE_TYPE (TREE_TYPE (fndecl))) == Pmode
- && (! strcmp (tname, "malloc")
- || ! strcmp (tname, "calloc")
- || ! strcmp (tname, "strdup")))
- flags |= ECF_MALLOC;
}
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;
- /* ??? We can't set IS_MALLOC for function types? */
+
if (DECL_P (exp))
{
+ struct cgraph_rtl_info *i = cgraph_rtl_info (exp);
type = TREE_TYPE (exp);
+ if (i)
+ {
+ if (i->pure_function)
+ flags |= ECF_PURE | ECF_LIBCALL_BLOCK;
+ if (i->const_function)
+ flags |= ECF_CONST | ECF_LIBCALL_BLOCK;
+ }
+
/* The function exp may have the `malloc' attribute. */
- if (DECL_P (exp) && DECL_IS_MALLOC (exp))
+ if (DECL_IS_MALLOC (exp))
flags |= ECF_MALLOC;
/* The function exp may have the `pure' attribute. */
- if (DECL_P (exp) && DECL_IS_PURE (exp))
+ if (DECL_IS_PURE (exp))
flags |= ECF_PURE | ECF_LIBCALL_BLOCK;
if (TREE_NOTHROW (exp))
flags |= ECF_NOTHROW;
+
+ if (TREE_READONLY (exp) && ! TREE_THIS_VOLATILE (exp))
+ flags |= ECF_LIBCALL_BLOCK;
}
if (TREE_READONLY (exp) && ! TREE_THIS_VOLATILE (exp))
- flags |= ECF_CONST | ECF_LIBCALL_BLOCK;
+ flags |= ECF_CONST;
if (TREE_THIS_VOLATILE (exp))
flags |= ECF_NORETURN;
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;
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, BITS_PER_WORD);
/* 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, BITS_PER_WORD);
}
}
}
flags which may may be modified by this routine. */
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)
{
/* 1 if scanning parms front to back, -1 if scanning back to front. */
int inc;
/* Count arg position in order args appear. */
int argpos;
- struct args_size alignment_pad;
int i;
tree p;
with those made by function.c. */
/* See if this argument should be passed by invisible reference. */
- if ((TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST
- && contains_placeholder_p (TYPE_SIZE (type)))
+ 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),
mode = TYPE_MODE (type);
unsignedp = TREE_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;
#else
args[i].reg != 0,
#endif
- fndecl, args_size, &args[i].offset,
- &args[i].size, &alignment_pad);
-
-#ifndef ARGS_GROW_DOWNWARD
- args[i].slot_offset = *args_size;
+ 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
- args[i].alignment_pad = alignment_pad;
-
- /* If a part of the arg was put into registers,
- don't include that part in the amount pushed. */
- if (reg_parm_stack_space == 0 && ! args[i].pass_on_stack)
- args[i].size.constant -= ((args[i].partial * UNITS_PER_WORD)
- / (PARM_BOUNDARY / BITS_PER_UNIT)
- * (PARM_BOUNDARY / BITS_PER_UNIT));
-
/* Update ARGS_SIZE, the total stack space for args so far. */
- args_size->constant += args[i].size.constant;
- if (args[i].size.var)
- {
- ADD_PARM_SIZE (*args_size, args[i].size.var);
- }
-
- /* Since the slot offset points to the bottom of the slot,
- we must record it after incrementing if the args grow down. */
-#ifdef ARGS_GROW_DOWNWARD
- args[i].slot_offset = *args_size;
-
- args[i].slot_offset.constant = -args_size->constant;
- if (args_size->var)
- SUB_PARM_SIZE (args[i].slot_offset, args_size->var);
-#endif
+ args_size->constant += args[i].locate.size.constant;
+ if (args[i].locate.size.var)
+ ADD_PARM_SIZE (*args_size, args[i].locate.size.var);
/* Increment ARGS_SO_FAR, which has info about which arg-registers
have been used, etc. */
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;
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;
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)
{
for (i = 0; i < num_actuals; i++)
{
- rtx offset = ARGS_SIZE_RTX (args[i].offset);
- rtx slot_offset = ARGS_SIZE_RTX (args[i].slot_offset);
+ rtx offset = ARGS_SIZE_RTX (args[i].locate.offset);
+ rtx slot_offset = ARGS_SIZE_RTX (args[i].locate.slot_offset);
rtx addr;
/* Skip this parm if it will not be passed on the stack. */
addr = plus_constant (addr, arg_offset);
args[i].stack = gen_rtx_MEM (args[i].mode, addr);
+ set_mem_align (args[i].stack, PARM_BOUNDARY);
set_mem_attributes (args[i].stack,
TREE_TYPE (args[i].tree_value), 1);
addr = plus_constant (addr, arg_offset);
args[i].stack_slot = gen_rtx_MEM (args[i].mode, addr);
+ set_mem_align (args[i].stack_slot, PARM_BOUNDARY);
set_mem_attributes (args[i].stack_slot,
TREE_TYPE (args[i].tree_value), 1);
FNDECL is the tree node for the target function. For an indirect call
FNDECL will be NULL_TREE.
- EXP is the CALL_EXPR for this call. */
+ ADDR is the operand 0 of CALL_EXPR for this call. */
static rtx
-rtx_for_function_call (fndecl, exp)
- tree fndecl;
- tree exp;
+rtx_for_function_call (tree fndecl, tree addr)
{
rtx funexp;
/* Generate an rtx (probably a pseudo-register) for the address. */
{
push_temp_slots ();
- funexp = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, VOIDmode, 0);
+ funexp = expand_expr (addr, NULL_RTX, VOIDmode, 0);
pop_temp_slots (); /* FUNEXP can't be BLKmode. */
emit_queue ();
}
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;
{
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_binop (word_mode, ashl_optab, reg,
+ GEN_INT (shift), reg, 1, OPTAB_WIDEN);
+ 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);
+
+#ifdef BLOCK_REG_PADDING
+ /* Handle a BLKmode that needs shifting. */
+ if (nregs == 1 && size < UNITS_PER_WORD
+ && args[i].locate.where_pad == downward)
+ {
+ 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;
+ optab dir = BYTES_BIG_ENDIAN ? lshr_optab : ashl_optab;
+
+ emit_move_insn (x, tem);
+ x = expand_binop (word_mode, dir, x, GEN_INT (shift),
+ ri, 1, OPTAB_WIDEN);
+ if (x != ri)
+ emit_move_insn (ri, x);
+ }
+ else
+#endif
+ 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
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;
+try_to_integrate (tree fndecl, tree actparms, rtx target, int ignore,
+ tree type, rtx structure_value_addr)
{
rtx temp;
rtx before_call;
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 ("%Hinlining failed in call to '%F'",
+ &DECL_SOURCE_LOCATION (fndecl), fndecl);
warning ("called from here");
}
(*lang_hooks.mark_addressable) (fndecl);
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;
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;
if (mark_stored_args_map)
{
#ifdef ARGS_GROW_DOWNWARD
- low = -arg->slot_offset.constant - arg->size.constant;
+ low = -arg->locate.slot_offset.constant - arg->locate.size.constant;
#else
- low = arg->slot_offset.constant;
+ low = arg->locate.slot_offset.constant;
#endif
- for (high = low + arg->size.constant; low < high; low++)
+ for (high = low + arg->locate.size.constant; low < high; low++)
SET_BIT (stored_args_map, low);
}
return insn != NULL_RTX;
}
static tree
-fix_unsafe_tree (t)
- tree t;
+fix_unsafe_tree (tree t)
{
switch (unsafe_for_reeval (t))
{
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;
rtx tail_call_insns = NULL_RTX;
/* Data type of the function. */
tree funtype;
+ tree type_arg_types;
/* Declaration of the function being called,
or 0 if the function is computed (not known by name). */
tree fndecl = 0;
/* 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;
int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
char *initial_stack_usage_map = stack_usage_map;
- int old_stack_arg_under_construction = 0;
+ int old_stack_allocated;
+
+ /* State variables to track stack modifications. */
rtx old_stack_level = 0;
+ int old_stack_arg_under_construction = 0;
int old_pending_adj = 0;
int old_inhibit_defer_pop = inhibit_defer_pop;
- int old_stack_allocated;
+
+ /* Some stack pointer alterations we make are performed via
+ allocate_dynamic_stack_space. This modifies the stack_pointer_delta,
+ which we then also need to save/restore along the way. */
+ int old_stack_pointer_delta = 0;
+
rtx call_fusage;
tree p = TREE_OPERAND (exp, 0);
+ tree addr = TREE_OPERAND (exp, 0);
int i;
/* The alignment of the stack, in bits. */
HOST_WIDE_INT preferred_stack_boundary;
if (DECL_INLINE (fndecl) && warn_inline && !flag_no_inline
&& optimize > 0)
{
- warning_with_decl (fndecl, "can't inline call to `%s'");
+ warning ("%Hcan't inline call to '%F'",
+ &DECL_SOURCE_LOCATION (fndecl), fndecl);
warning ("called from here");
}
(*lang_hooks.mark_addressable) (fndecl);
else
flags |= flags_from_decl_or_type (TREE_TYPE (TREE_TYPE (p)));
+ struct_value = targetm.calls.struct_value_rtx (fndecl ? TREE_TYPE (fndecl) : 0, 0);
+
+ /* Warn if this value is an aggregate type,
+ regardless of which calling convention we are using for it. */
+ if (warn_aggregate_return && AGGREGATE_TYPE_P (TREE_TYPE (exp)))
+ warning ("function call has aggregate value");
+
+ /* If the result of a pure or const function call is ignored (or void),
+ and none of its arguments are volatile, we can avoid expanding the
+ call and just evaluate the arguments for side-effects. */
+ if ((flags & (ECF_CONST | ECF_PURE))
+ && (ignore || target == const0_rtx
+ || TYPE_MODE (TREE_TYPE (exp)) == VOIDmode))
+ {
+ bool volatilep = false;
+ tree arg;
+
+ for (arg = actparms; arg; arg = TREE_CHAIN (arg))
+ if (TREE_THIS_VOLATILE (TREE_VALUE (arg)))
+ {
+ volatilep = true;
+ break;
+ }
+
+ if (! volatilep)
+ {
+ for (arg = actparms; arg; arg = TREE_CHAIN (arg))
+ expand_expr (TREE_VALUE (arg), const0_rtx,
+ VOIDmode, EXPAND_NORMAL);
+ return const0_rtx;
+ }
+ }
+
#ifdef REG_PARM_STACK_SPACE
#ifdef MAYBE_REG_PARM_STACK_SPACE
reg_parm_stack_space = MAYBE_REG_PARM_STACK_SPACE;
must_preallocate = 1;
#endif
- /* Warn if this value is an aggregate type,
- regardless of which calling convention we are using for it. */
- if (warn_aggregate_return && AGGREGATE_TYPE_P (TREE_TYPE (exp)))
- warning ("function call has aggregate value");
-
/* 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);
/* Figure out the amount to which the stack should be aligned. */
preferred_stack_boundary = PREFERRED_STACK_BOUNDARY;
+ if (fndecl)
+ {
+ struct cgraph_rtl_info *i = cgraph_rtl_info (fndecl);
+ if (i && i->preferred_incoming_stack_boundary)
+ preferred_stack_boundary = i->preferred_incoming_stack_boundary;
+ }
/* Operand 0 is a pointer-to-function; get the type of the function. */
- funtype = TREE_TYPE (TREE_OPERAND (exp, 0));
+ funtype = TREE_TYPE (addr);
if (! POINTER_TYPE_P (funtype))
abort ();
funtype = TREE_TYPE (funtype);
+ /* Munge the tree to split complex arguments into their imaginary
+ and real parts. */
+ if (SPLIT_COMPLEX_ARGS)
+ {
+ 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 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
for (p = actparms, num_actuals = 0; p; p = TREE_CHAIN (p))
num_actuals++;
+ /* Start updating where the next arg would go.
+
+ On some machines (such as the PA) indirect calls have a difuferent
+ calling convention than normal calls. The last 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);
+
/* 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.
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 (funtype) != 0)
+ if ((targetm.calls.strict_argument_naming (&args_so_far)
+ || ! targetm.calls.pretend_outgoing_varargs_named (&args_so_far))
+ && type_arg_types != 0)
n_named_args
- = (list_length (TYPE_ARG_TYPES (funtype))
+ = (list_length (type_arg_types)
/* Don't include the last named arg. */
- - (STRICT_ARGUMENT_NAMING ? 0 : 1)
+ - (targetm.calls.strict_argument_naming (&args_so_far) ? 0 : 1)
/* Count the struct value address, if it is passed as a parm. */
+ structure_value_addr_parm);
else
/* If we know nothing, treat all args as named. */
n_named_args = num_actuals;
- /* 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
- INIT_CUMULATIVE_ARGS tells the backend if this is an indirect call
- or not. */
- INIT_CUMULATIVE_ARGS (args_so_far, funtype, NULL_RTX, fndecl);
-
/* 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. */
if (currently_expanding_call++ != 0
|| !flag_optimize_sibling_calls
|| !rtx_equal_function_value_matters
- || any_pending_cleanups (1)
+ || any_pending_cleanups ()
|| 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 (TREE_OPERAND (exp, 0)) != ADDR_EXPR
- || TREE_OPERAND (TREE_OPERAND (exp, 0), 0) != current_function_decl)
+ || TREE_CODE (addr) != ADDR_EXPR
+ || TREE_OPERAND (addr, 0) != current_function_decl)
try_tail_recursion = 0;
/* Rest of purposes for tail call optimizations to fail. */
/* Functions that do not return exactly once may not be sibcall
optimized. */
|| (flags & (ECF_RETURNS_TWICE | ECF_LONGJMP | ECF_NORETURN))
- || TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp, 0))))
+ || TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (addr)))
+ /* If the called function is nested in the current one, it might access
+ some of the caller's arguments, but could clobber them beforehand if
+ the argument areas are shared. */
+ || (fndecl && decl_function_context (fndecl) == current_function_decl)
/* If this function requires more stack slots than the current
function, we cannot change it into a sibling call. */
|| args_size.constant > current_function_args_size
/* If the callee pops its own arguments, then it must pop exactly
the same number of arguments as the current function. */
- || RETURN_POPS_ARGS (fndecl, funtype, args_size.constant)
- != RETURN_POPS_ARGS (current_function_decl,
- TREE_TYPE (current_function_decl),
- current_function_args_size))
+ || (RETURN_POPS_ARGS (fndecl, funtype, args_size.constant)
+ != RETURN_POPS_ARGS (current_function_decl,
+ TREE_TYPE (current_function_decl),
+ current_function_args_size))
+ || !(*lang_hooks.decls.ok_for_sibcall) (fndecl))
try_tail_call = 0;
if (try_tail_call || try_tail_recursion)
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. */
+ /* Do the same for the function address if it is an expression. */
if (!fndecl)
- TREE_OPERAND (exp, 0) = fix_unsafe_tree (TREE_OPERAND (exp, 0));
+ 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))
+ if (any_pending_cleanups ())
try_tail_call = try_tail_recursion = 0;
}
expand_start_target_temps ();
if (optimize_tail_recursion (actparms, get_last_insn ()))
{
- if (any_pending_cleanups (1))
+ if (any_pending_cleanups ())
try_tail_call = try_tail_recursion = 0;
else
tail_recursion_insns = get_insns ();
is subject to race conditions, just as with multithreaded
programs. */
- emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__gcov_flush"),
- LCT_ALWAYS_RETURN,
- VOIDmode, 0);
+ emit_library_call (gcov_flush_libfunc, LCT_ALWAYS_RETURN, VOIDmode, 0);
}
/* Ensure current function's preferred stack boundary is at least
if (cfun->preferred_stack_boundary < preferred_stack_boundary
&& fndecl != current_function_decl)
cfun->preferred_stack_boundary = preferred_stack_boundary;
+ if (fndecl == current_function_decl)
+ cfun->recursive_call_emit = true;
preferred_unit_stack_boundary = preferred_stack_boundary / BITS_PER_UNIT;
if (old_stack_level == 0)
{
emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
+ old_stack_pointer_delta = stack_pointer_delta;
old_pending_adj = pending_stack_adjust;
pending_stack_adjust = 0;
/* stack_arg_under_construction says whether a stack arg is
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,
if (needed == 0)
argblock = virtual_outgoing_args_rtx;
else
- argblock = push_block (GEN_INT (needed), 0, 0);
+ {
+ argblock = push_block (GEN_INT (needed), 0, 0);
+#ifdef ARGS_GROW_DOWNWARD
+ argblock = plus_constant (argblock, needed);
+#endif
+ }
/* We only really need to call `copy_to_reg' in the case
where push insns are going to be used to pass ARGBLOCK
VIRTUAL_OUTGOING_ARGS_RTX changes as well. But might
as well always do it. */
argblock = copy_to_reg (argblock);
+ }
+ }
+ }
- /* The save/restore code in store_one_arg handles all
- cases except one: a constructor call (including a C
- function returning a BLKmode struct) to initialize
- an argument. */
- if (stack_arg_under_construction)
- {
+ if (ACCUMULATE_OUTGOING_ARGS)
+ {
+ /* The save/restore code in store_one_arg handles all
+ cases except one: a constructor call (including a C
+ function returning a BLKmode struct) to initialize
+ an argument. */
+ if (stack_arg_under_construction)
+ {
#ifndef OUTGOING_REG_PARM_STACK_SPACE
- rtx push_size = GEN_INT (reg_parm_stack_space
- + adjusted_args_size.constant);
+ rtx push_size = GEN_INT (reg_parm_stack_space
+ + adjusted_args_size.constant);
#else
- rtx push_size = GEN_INT (adjusted_args_size.constant);
+ rtx push_size = GEN_INT (adjusted_args_size.constant);
#endif
- if (old_stack_level == 0)
- {
- emit_stack_save (SAVE_BLOCK, &old_stack_level,
- NULL_RTX);
- old_pending_adj = pending_stack_adjust;
- pending_stack_adjust = 0;
- /* stack_arg_under_construction says whether a stack
- arg is being constructed at the old stack level.
- Pushing the stack gets a clean outgoing argument
- block. */
- old_stack_arg_under_construction
- = 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);
- memset (stack_usage_map, 0, highest_outgoing_arg_in_use);
- highest_outgoing_arg_in_use = 0;
- }
- allocate_dynamic_stack_space (push_size, NULL_RTX,
- BITS_PER_UNIT);
- }
- /* If argument evaluation might modify the stack pointer,
- copy the address of the argument list to a register. */
- for (i = 0; i < num_actuals; i++)
- if (args[i].pass_on_stack)
- {
- argblock = copy_addr_to_reg (argblock);
- break;
- }
+ if (old_stack_level == 0)
+ {
+ emit_stack_save (SAVE_BLOCK, &old_stack_level,
+ NULL_RTX);
+ old_stack_pointer_delta = stack_pointer_delta;
+ old_pending_adj = pending_stack_adjust;
+ pending_stack_adjust = 0;
+ /* stack_arg_under_construction says whether a stack
+ arg is being constructed at the old stack level.
+ Pushing the stack gets a clean outgoing argument
+ block. */
+ old_stack_arg_under_construction
+ = stack_arg_under_construction;
+ stack_arg_under_construction = 0;
+ /* Make a new map for the new argument list. */
+ 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;
}
+ allocate_dynamic_stack_space (push_size, NULL_RTX,
+ BITS_PER_UNIT);
}
+
+ /* If argument evaluation might modify the stack pointer,
+ copy the address of the argument list to a register. */
+ for (i = 0; i < num_actuals; i++)
+ if (args[i].pass_on_stack)
+ {
+ argblock = copy_addr_to_reg (argblock);
+ break;
+ }
}
compute_argument_addresses (args, argblock, num_actuals);
be deferred during the evaluation of the arguments. */
NO_DEFER_POP;
- funexp = rtx_for_function_call (fndecl, exp);
+ funexp = rtx_for_function_call (fndecl, addr);
/* Figure out the register where the value, if any, will come back. */
valreg = 0;
structure value. */
if (pass != 0 && structure_value_addr && ! structure_value_addr_parm)
{
- emit_move_insn (struct_value_rtx,
+#ifdef POINTERS_EXTEND_UNSIGNED
+ if (GET_MODE (structure_value_addr) != Pmode)
+ structure_value_addr = convert_memory_address
+ (Pmode, structure_value_addr);
+#endif
+ 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 (GET_CODE (struct_value) == REG)
+ use_reg (&call_fusage, struct_value);
}
funexp = prepare_call_address (funexp, fndecl, &call_fusage,
next_arg_reg, valreg, old_inhibit_defer_pop, call_fusage,
flags, & args_so_far);
- /* Verify that we've deallocated all the stack we used. */
- if (pass
- && old_stack_allocated != stack_pointer_delta - pending_stack_adjust)
- abort ();
-
/* If call is cse'able, make appropriate pair of reg-notes around it.
Test valreg so we don't crash; may safely ignore `const'
if return type is void. Disable for PARALLEL return values, because
if (pass && (flags & ECF_LIBCALL_BLOCK))
{
rtx insns;
+ rtx insn;
+ bool failed = valreg == 0 || GET_CODE (valreg) == PARALLEL;
+
+ insns = get_insns ();
+
+ /* Expansion of block moves possibly introduced a loop that may
+ not appear inside libcall block. */
+ for (insn = insns; insn; insn = NEXT_INSN (insn))
+ if (GET_CODE (insn) == JUMP_INSN)
+ failed = true;
- if (valreg == 0 || GET_CODE (valreg) == PARALLEL)
+ if (failed)
{
- insns = get_insns ();
end_sequence ();
emit_insn (insns);
}
args[i].initial_value, note);
note = gen_rtx_EXPR_LIST (VOIDmode, funexp, note);
- insns = get_insns ();
end_sequence ();
if (flags & ECF_PURE)
}
emit_barrier_after (last);
+
+ /* Stack adjustments after a noreturn call are dead code. */
+ stack_pointer_delta = old_stack_allocated;
+ pending_stack_adjust = 0;
}
if (flags & ECF_LONGJMP)
current_function_calls_longjmp = 1;
- /* If this function is returning into a memory location marked as
- readonly, it means it is initializing that location. But we normally
- treat functions as not clobbering such locations, so we need to
- specify that this one does. */
- if (target != 0 && GET_CODE (target) == MEM
- && structure_value_addr != 0 && RTX_UNCHANGING_P (target))
- emit_insn (gen_rtx_CLOBBER (VOIDmode, target));
-
/* 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 (any_pending_cleanups ())
{
if (target && REG_P (target)
&& REGNO (target) < FIRST_PSEUDO_REGISTER)
}
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 they refer to the same register, this move will be a no-op,
except when function inlining is being done. */
emit_move_insn (target, valreg);
+
+ /* 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)
+ sibcall_failure = 1;
}
else if (TYPE_MODE (TREE_TYPE (exp)) == BLKmode)
{
else
target = copy_to_reg (valreg);
-#ifdef PROMOTE_FUNCTION_RETURN
+ 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
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. */
if (old_stack_level && ! (flags & ECF_SP_DEPRESSED))
{
emit_stack_restore (SAVE_BLOCK, old_stack_level, NULL_RTX);
+ stack_pointer_delta = old_stack_pointer_delta;
pending_stack_adjust = old_pending_adj;
stack_arg_under_construction = old_stack_arg_under_construction;
highest_outgoing_arg_in_use = initial_highest_arg_in_use;
emit_move_insn (stack_area, args[i].save_area);
else
emit_block_move (stack_area, args[i].save_area,
- GEN_INT (args[i].size.constant),
+ GEN_INT (args[i].locate.size.constant),
BLOCK_OP_CALL_PARM);
}
expand_end_target_temps ();
}
+ /* If this function is returning into a memory location marked as
+ readonly, it means it is initializing that location. We normally treat
+ functions as not clobbering such locations, so we need to specify that
+ this one does. We do this by adding the appropriate CLOBBER to the
+ CALL_INSN function usage list. This cannot be done by emitting a
+ standalone CLOBBER after the call because the latter would be ignored
+ 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))
+ add_function_usage_to
+ (last_call_insn (),
+ gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_CLOBBER (VOIDmode, target),
+ NULL_RTX));
+
insns = get_insns ();
end_sequence ();
sbitmap_free (stored_args_map);
}
else
- normal_call_insns = insns;
+ {
+ normal_call_insns = insns;
+
+ /* Verify that we've deallocated all the stack we used. */
+ if (! (flags & (ECF_NORETURN | ECF_LONGJMP))
+ && old_stack_allocated != stack_pointer_delta
+ - pending_stack_adjust)
+ abort ();
+ }
/* If something prevents making this a sibling call,
zero out the sequence. */
return target;
}
+
+/* Traverse an argument list in VALUES and expand all complex
+ arguments into their components. */
+tree
+split_complex_values (tree values)
+{
+ tree p;
+
+ values = copy_list (values);
+
+ for (p = values; p; p = TREE_CHAIN (p))
+ {
+ tree complex_value = TREE_VALUE (p);
+ tree complex_type;
+
+ complex_type = TREE_TYPE (complex_value);
+ if (!complex_type)
+ continue;
+
+ if (TREE_CODE (complex_type) == COMPLEX_TYPE)
+ {
+ tree subtype;
+ tree real, imag, next;
+
+ subtype = TREE_TYPE (complex_type);
+ complex_value = save_expr (complex_value);
+ real = build1 (REALPART_EXPR, subtype, complex_value);
+ imag = build1 (IMAGPART_EXPR, subtype, complex_value);
+
+ TREE_VALUE (p) = real;
+ next = TREE_CHAIN (p);
+ imag = build_tree_list (NULL_TREE, imag);
+ TREE_CHAIN (p) = imag;
+ TREE_CHAIN (imag) = next;
+
+ /* Skip the newly created node. */
+ p = TREE_CHAIN (p);
+ }
+ }
+
+ return values;
+}
+
+/* Traverse a list of TYPES and expand all complex types into their
+ components. */
+tree
+split_complex_types (tree types)
+{
+ tree p;
+
+ 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)
+ {
+ tree next, imag;
+
+ /* Rewrite complex type with component type. */
+ TREE_VALUE (p) = TREE_TYPE (complex_type);
+ next = TREE_CHAIN (p);
+
+ /* Add another component type for the imaginary part. */
+ imag = build_tree_list (NULL_TREE, TREE_VALUE (p));
+ TREE_CHAIN (p) = imag;
+ TREE_CHAIN (imag) = next;
+
+ /* Skip the newly created node. */
+ p = TREE_CHAIN (p);
+ }
+ }
+
+ return types;
+}
\f
/* Output a library call to function FUN (a SYMBOL_REF rtx).
The RETVAL parameter specifies whether return value needs to be saved, other
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;
rtx fun;
int inc;
int count;
- struct args_size alignment_pad;
rtx argblock = 0;
CUMULATIVE_ARGS args_so_far;
struct arg
enum machine_mode mode;
rtx reg;
int partial;
- struct args_size offset;
- struct args_size size;
+ struct locate_and_pad_arg_data locate;
rtx save_area;
};
struct arg *argvec;
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;
if (outmode != VOIDmode)
{
tfom = (*lang_hooks.types.type_for_mode) (outmode, 0);
- if (aggregate_value_p (tfom))
+ if (aggregate_value_p (tfom, 0))
{
#ifdef PCC_STATIC_STRUCT_RETURN
rtx pointer_reg
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);
/* 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++;
#else
argvec[count].reg != 0,
#endif
- NULL_TREE, &args_size, &argvec[count].offset,
- &argvec[count].size, &alignment_pad);
+ 0, NULL_TREE, &args_size, &argvec[count].locate);
if (argvec[count].reg == 0 || argvec[count].partial != 0
|| reg_parm_stack_space > 0)
- args_size.constant += argvec[count].size.constant;
+ args_size.constant += argvec[count].locate.size.constant;
FUNCTION_ARG_ADVANCE (args_so_far, Pmode, (tree) 0, 1);
|| (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. */
{
rtx slot;
int must_copy = 1
-#ifdef FUNCTION_ARG_CALLEE_COPIES
+#ifdef FUNCTION_ARG_CALLEE_COPIES
&& ! FUNCTION_ARG_CALLEE_COPIES (args_so_far, mode,
NULL_TREE, 1)
#endif
#else
argvec[count].reg != 0,
#endif
- NULL_TREE, &args_size, &argvec[count].offset,
- &argvec[count].size, &alignment_pad);
+ argvec[count].partial,
+ NULL_TREE, &args_size, &argvec[count].locate);
- if (argvec[count].size.var)
+ if (argvec[count].locate.size.var)
abort ();
- if (reg_parm_stack_space == 0 && argvec[count].partial)
- argvec[count].size.constant -= argvec[count].partial * UNITS_PER_WORD;
-
if (argvec[count].reg == 0 || argvec[count].partial != 0
|| reg_parm_stack_space > 0)
- args_size.constant += argvec[count].size.constant;
+ args_size.constant += argvec[count].locate.size.constant;
FUNCTION_ARG_ADVANCE (args_so_far, mode, (tree) 0, 1);
}
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,
#ifdef ARGS_GROW_DOWNWARD
/* stack_slot is negative, but we want to index stack_usage_map
with positive values. */
- upper_bound = -argvec[argnum].offset.constant + 1;
- lower_bound = upper_bound - argvec[argnum].size.constant;
+ upper_bound = -argvec[argnum].locate.offset.constant + 1;
+ lower_bound = upper_bound - argvec[argnum].locate.size.constant;
#else
- lower_bound = argvec[argnum].offset.constant;
- upper_bound = lower_bound + argvec[argnum].size.constant;
+ lower_bound = argvec[argnum].locate.offset.constant;
+ upper_bound = lower_bound + argvec[argnum].locate.size.constant;
#endif
i = lower_bound;
if (i < upper_bound)
{
- /* We need to make a save area. See what mode we can make
- it. */
+ /* We need to make a save area. */
+ unsigned int size
+ = argvec[argnum].locate.size.constant * BITS_PER_UNIT;
enum machine_mode save_mode
- = mode_for_size (argvec[argnum].size.constant
- * BITS_PER_UNIT,
- MODE_INT, 1);
+ = mode_for_size (size, MODE_INT, 1);
+ rtx adr
+ = plus_constant (argblock,
+ argvec[argnum].locate.offset.constant);
rtx stack_area
- = gen_rtx_MEM
- (save_mode,
- memory_address
- (save_mode,
- plus_constant (argblock,
- argvec[argnum].offset.constant)));
- argvec[argnum].save_area = gen_reg_rtx (save_mode);
-
- emit_move_insn (argvec[argnum].save_area, stack_area);
+ = gen_rtx_MEM (save_mode, memory_address (save_mode, adr));
+
+ 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);
+ }
}
}
emit_push_insn (val, mode, NULL_TREE, NULL_RTX, PARM_BOUNDARY,
partial, reg, 0, argblock,
- GEN_INT (argvec[argnum].offset.constant),
- reg_parm_stack_space, ARGS_SIZE_RTX (alignment_pad));
+ GEN_INT (argvec[argnum].locate.offset.constant),
+ reg_parm_stack_space,
+ ARGS_SIZE_RTX (argvec[argnum].locate.alignment_pad));
/* Now mark the segment we just used. */
if (ACCUMULATE_OUTGOING_ARGS)
/* 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 (GET_MODE (val)));
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 (GET_CODE (struct_value) == REG)
+ use_reg (&call_fusage, struct_value);
}
/* Don't allow popping to be deferred, since then
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);
if (argvec[count].save_area)
{
enum machine_mode save_mode = GET_MODE (argvec[count].save_area);
- rtx stack_area
- = gen_rtx_MEM (save_mode,
- memory_address
- (save_mode,
- plus_constant (argblock,
- argvec[count].offset.constant)));
-
- emit_move_insn (stack_area, argvec[count].save_area);
+ rtx adr = plus_constant (argblock,
+ argvec[count].locate.offset.constant);
+ rtx stack_area = gen_rtx_MEM (save_mode,
+ memory_address (save_mode, adr));
+
+ 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;
or other LCT_ value for other types of library calls. */
void
-emit_library_call VPARAMS((rtx orgfun, enum libcall_type fn_type,
- enum machine_mode outmode, int nargs, ...))
+emit_library_call (rtx orgfun, enum libcall_type fn_type,
+ enum machine_mode outmode, int nargs, ...)
{
- VA_OPEN (p, nargs);
- VA_FIXEDARG (p, rtx, orgfun);
- VA_FIXEDARG (p, int, fn_type);
- VA_FIXEDARG (p, enum machine_mode, outmode);
- VA_FIXEDARG (p, int, nargs);
+ va_list p;
+ va_start (p, nargs);
emit_library_call_value_1 (0, orgfun, NULL_RTX, fn_type, outmode, nargs, p);
-
- VA_CLOSE (p);
+ va_end (p);
}
\f
/* Like emit_library_call except that an extra argument, VALUE,
If VALUE is nonzero, VALUE is returned. */
rtx
-emit_library_call_value VPARAMS((rtx orgfun, rtx value,
- enum libcall_type fn_type,
- enum machine_mode outmode, int nargs, ...))
+emit_library_call_value (rtx orgfun, rtx value,
+ enum libcall_type fn_type,
+ enum machine_mode outmode, int nargs, ...)
{
rtx result;
-
- VA_OPEN (p, nargs);
- VA_FIXEDARG (p, rtx, orgfun);
- VA_FIXEDARG (p, rtx, value);
- VA_FIXEDARG (p, int, fn_type);
- VA_FIXEDARG (p, enum machine_mode, outmode);
- VA_FIXEDARG (p, int, nargs);
+ va_list p;
+ va_start (p, nargs);
result = emit_library_call_value_1 (1, orgfun, value, fn_type, outmode,
nargs, p);
-
- VA_CLOSE (p);
+ va_end (p);
return result;
}
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;
else
upper_bound = 0;
- lower_bound = upper_bound - arg->size.constant;
+ lower_bound = upper_bound - arg->locate.size.constant;
#else
if (GET_CODE (XEXP (arg->stack_slot, 0)) == PLUS)
lower_bound = INTVAL (XEXP (XEXP (arg->stack_slot, 0), 1));
else
lower_bound = 0;
- upper_bound = lower_bound + arg->size.constant;
+ upper_bound = lower_bound + arg->locate.size.constant;
#endif
i = lower_bound;
if (i < upper_bound)
{
- /* We need to make a save area. See what mode we can make it. */
- enum machine_mode save_mode
- = mode_for_size (arg->size.constant * BITS_PER_UNIT, MODE_INT, 1);
- rtx stack_area
- = gen_rtx_MEM (save_mode,
- memory_address (save_mode,
- XEXP (arg->stack_slot, 0)));
+ /* We need to make a save area. */
+ unsigned int size = arg->locate.size.constant * BITS_PER_UNIT;
+ enum machine_mode save_mode = mode_for_size (size, MODE_INT, 1);
+ rtx adr = memory_address (save_mode, XEXP (arg->stack_slot, 0));
+ rtx stack_area = gen_rtx_MEM (save_mode, adr);
if (save_mode == BLKmode)
{
}
}
}
- /* Now that we have saved any slots that will be overwritten by this
- store, mark all slots this store will use. We must do this before
- we actually expand the argument since the expansion itself may
- trigger library calls which might need to use the same stack slot. */
- if (argblock && ! variable_size && arg->stack)
- for (i = lower_bound; i < upper_bound; i++)
- stack_usage_map[i] = 1;
}
/* If this isn't going to be placed on both the stack and in registers,
(partial
|| TYPE_MODE (TREE_TYPE (pval)) != arg->mode)
? NULL_RTX : arg->stack,
- VOIDmode, 0);
+ VOIDmode, EXPAND_STACK_PARM);
/* If we are promoting object (or for any other reason) the mode
doesn't agree, convert the mode. */
/* 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->offset), reg_parm_stack_space,
- ARGS_SIZE_RTX (arg->alignment_pad));
+ ARGS_SIZE_RTX (arg->locate.offset), reg_parm_stack_space,
+ ARGS_SIZE_RTX (arg->locate.alignment_pad));
/* Unless this is a partially-in-register argument, the argument is now
in the stack. */
/* Round its size up to a multiple
of the allocation unit for arguments. */
- if (arg->size.var != 0)
+ if (arg->locate.size.var != 0)
{
excess = 0;
- size_rtx = ARGS_SIZE_RTX (arg->size);
+ size_rtx = ARGS_SIZE_RTX (arg->locate.size);
}
else
{
/* PUSH_ROUNDING has no effect on us, because
emit_push_insn for BLKmode is careful to avoid it. */
- excess = (arg->size.constant - int_size_in_bytes (TREE_TYPE (pval))
+ 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);
PARM_BOUNDARY, but the actual argument isn't. */
if (FUNCTION_ARG_PADDING (arg->mode, TREE_TYPE (pval)) == downward)
{
- if (arg->size.var)
+ if (arg->locate.size.var)
parm_align = BITS_PER_UNIT;
else if (excess)
{
if ((flags & ECF_SIBCALL) && GET_CODE (arg->value) == MEM)
{
/* emit_push_insn might not work properly if arg->value and
- argblock + arg->offset areas overlap. */
+ argblock + arg->locate.offset areas overlap. */
rtx x = arg->value;
int i = 0;
i = INTVAL (XEXP (XEXP (x, 0), 1));
/* expand_call should ensure this */
- if (arg->offset.var || GET_CODE (size_rtx) != CONST_INT)
+ if (arg->locate.offset.var || GET_CODE (size_rtx) != CONST_INT)
abort ();
- if (arg->offset.constant > i)
+ if (arg->locate.offset.constant > i)
{
- if (arg->offset.constant < i + INTVAL (size_rtx))
+ if (arg->locate.offset.constant < i + INTVAL (size_rtx))
sibcall_failure = 1;
}
- else if (arg->offset.constant < i)
+ else if (arg->locate.offset.constant < i)
{
- if (i < arg->offset.constant + INTVAL (size_rtx))
+ if (i < arg->locate.offset.constant + INTVAL (size_rtx))
sibcall_failure = 1;
}
}
}
- /* Special handling is required if part of the parameter lies in the
- register parameter area. The argument may be copied into the stack
- slot using memcpy(), but the original contents of the register
- parameter area will be restored after the memcpy() call.
-
- To ensure that the part that lies in the register parameter area
- is copied correctly, we emit a separate push for that part. This
- push should be small enough to avoid a call to memcpy(). */
-#ifndef STACK_PARMS_IN_REG_PARM_AREA
- if (arg->reg && arg->pass_on_stack)
-#else
- if (1)
-#endif
- {
- if (arg->offset.constant < reg_parm_stack_space && arg->offset.var)
- error ("variable offset is passed partially in stack and in reg");
- else if (arg->offset.constant < reg_parm_stack_space && arg->size.var)
- error ("variable size is passed partially in stack and in reg");
- else if (arg->offset.constant < reg_parm_stack_space
- && ((arg->offset.constant + arg->size.constant)
- > reg_parm_stack_space))
- {
- rtx size_rtx1 = GEN_INT (reg_parm_stack_space - arg->offset.constant);
- emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), size_rtx1,
- parm_align, partial, reg, excess, argblock,
- ARGS_SIZE_RTX (arg->offset), reg_parm_stack_space,
- ARGS_SIZE_RTX (arg->alignment_pad));
- }
- }
-
-
emit_push_insn (arg->value, arg->mode, TREE_TYPE (pval), size_rtx,
parm_align, partial, reg, excess, argblock,
- ARGS_SIZE_RTX (arg->offset), reg_parm_stack_space,
- ARGS_SIZE_RTX (arg->alignment_pad));
+ ARGS_SIZE_RTX (arg->locate.offset), reg_parm_stack_space,
+ ARGS_SIZE_RTX (arg->locate.alignment_pad));
/* Unless this is a partially-in-register argument, the argument is now
in the stack.
arg->value = arg->stack_slot;
}
+ /* Mark all slots this store used. */
+ if (ACCUMULATE_OUTGOING_ARGS && !(flags & ECF_SIBCALL)
+ && argblock && ! variable_size && arg->stack)
+ for (i = lower_bound; i < upper_bound; i++)
+ stack_usage_map[i] = 1;
+
/* Once we have pushed something, pops can't safely
be deferred during the rest of the arguments. */
NO_DEFER_POP;
return sibcall_failure;
}
-
/* Nonzero if we do not know how to pass TYPE solely in registers.
We cannot do so in the following cases:
For a little-endian machine, the reverse is true. */
bool
-default_must_pass_in_stack (mode, type)
- enum machine_mode mode;
- tree type;
+default_must_pass_in_stack (enum machine_mode mode, tree type)
{
if (!type)
return false;
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