/* 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 "langhooks.h"
#include "target.h"
#include "cgraph.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
+#include "except.h"
/* Like PREFERRED_STACK_BOUNDARY but in units of bytes, not bits. */
#define STACK_BYTES (PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT)
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 *,
+ 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 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);
+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
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;
/* 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
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 (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)
&& 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;
/* 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;
+ }
+ 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;
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);
}
}
}
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.
+
+ 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 call_from_thunk_p)
{
/* 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),
{
/* If we're compiling a thunk, pass through invisible
references instead of making a copy. */
- if (current_function_is_thunk
+ if (call_from_thunk_p
#ifdef FUNCTION_ARG_CALLEE_COPIES
|| (FUNCTION_ARG_CALLEE_COPIES (*args_so_far, TYPE_MODE (type),
type, argpos < n_named_args)
}
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;
#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;
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 this target defines ACCUMULATE_OUTGOING_ARGS to true, then we must
+ precompute all arguments that contain function calls. Otherwise,
+ computing arguments for a subcall may clobber arguments for this call.
+
+ If this target defines ACCUMULATE_OUTGOING_ARGS to false, then we only
+ need to precompute arguments that change the stack pointer, such as calls
+ to alloca, and calls that do not pop all of their arguments. */
for (i = 0; i < num_actuals; i++)
if ((flags & ECF_LIBCALL_BLOCK)
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 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;
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_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);
+
+ /* 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;
+ 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
+ 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;
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 ();
rtx insn = NULL_RTX, seq;
/* Look for a call in the inline function code.
- If DECL_SAVED_INSNS (fndecl)->outgoing_args_size is
+ If DECL_STRUCT_FUNCTION (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)
+ if (DECL_STRUCT_FUNCTION (fndecl)->outgoing_args_size == 0)
for (insn = first_insn; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == CALL_INSN)
break;
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);
+ int adjust =
+ (DECL_STRUCT_FUNCTION (fndecl)->outgoing_args_size
+ + reg_parm_stack_space);
start_sequence ();
emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
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 ("%Jinlining failed in call to '%F'", fndecl, fndecl);
warning ("called from here");
}
- (*lang_hooks.mark_addressable) (fndecl);
+ lang_hooks.mark_addressable (fndecl);
return (rtx) (size_t) - 1;
}
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))
{
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)
+ {
+ *value = expand_binop (GET_MODE (*value), lshr_optab, *value,
+ GEN_INT (shift), 0, 1, OPTAB_WIDEN);
+ *value = convert_to_mode (TYPE_MODE (type), *value, 0);
+ return true;
+ }
+ }
+ return false;
+}
+
/* 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;
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;
+ /* The type of the function being called. */
+ tree fntype;
rtx insn;
int try_tail_call = 1;
int try_tail_recursion = 1;
/* 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;
#endif
int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
+ rtx temp_target = 0;
char *initial_stack_usage_map = stack_usage_map;
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;
+ int old_stack_pointer_delta = 0;
rtx call_fusage;
tree p = TREE_OPERAND (exp, 0);
fndecl = get_callee_fndecl (exp);
if (fndecl)
{
+ fntype = TREE_TYPE (fndecl);
if (!flag_no_inline
&& fndecl != current_function_decl
&& DECL_INLINE (fndecl)
- && DECL_SAVED_INSNS (fndecl)
- && DECL_SAVED_INSNS (fndecl)->inlinable)
+ && DECL_STRUCT_FUNCTION (fndecl)
+ && DECL_STRUCT_FUNCTION (fndecl)->inlinable)
is_integrable = 1;
else if (! TREE_ADDRESSABLE (fndecl))
{
if (DECL_INLINE (fndecl) && warn_inline && !flag_no_inline
&& optimize > 0)
{
- warning_with_decl (fndecl, "can't inline call to `%s'");
+ warning ("%Jcan't inline call to '%F'", fndecl, fndecl);
warning ("called from here");
}
- (*lang_hooks.mark_addressable) (fndecl);
+ lang_hooks.mark_addressable (fndecl);
}
+ if (ignore
+ && lookup_attribute ("warn_unused_result",
+ TYPE_ATTRIBUTES (TREE_TYPE (fndecl))))
+ warning ("ignoring return value of `%D', "
+ "declared with attribute warn_unused_result", 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));
+ if (ignore
+ && lookup_attribute ("warn_unused_result", TYPE_ATTRIBUTES (fntype)))
+ warning ("ignoring return value of function "
+ "declared with attribute warn_unused_result");
+ 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. */
+ 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;
-#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)
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);
/* In case this is a static function, note that it has been
used. */
if (! TREE_ADDRESSABLE (fndecl))
- (*lang_hooks.mark_addressable) (fndecl);
+ lang_hooks.mark_addressable (fndecl);
is_integrable = 0;
}
}
abort ();
funtype = TREE_TYPE (funtype);
+ /* Munge the tree to split complex arguments into their imaginary
+ and real parts. */
+ 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 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
|| (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
/* 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.
+ 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 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
+ 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 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 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 ((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
/* 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);
/* 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,
+ CALL_FROM_THUNK_P (exp));
if (args_size.var)
{
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)
+ || current_nesting_level () == 0
+ || any_pending_cleanups ()
|| args_size.var)
try_tail_call = try_tail_recursion = 0;
|| 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))
|| 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)
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 ();
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,
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
= 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
&& 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 (GET_CODE (struct_value) == REG)
+ use_reg (&call_fusage, struct_value);
}
funexp = prepare_call_address (funexp, fndecl, &call_fusage,
if (pass && (flags & ECF_LIBCALL_BLOCK))
{
rtx insns;
+ rtx insn;
+ bool failed = valreg == 0 || GET_CODE (valreg) == PARALLEL;
- if (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 (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;
}
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)
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)
The Irix 6 ABI has examples of this. */
else if (GET_CODE (valreg) == PARALLEL)
{
- if (target == 0)
+ /* Second condition is added because "target" is freed at the
+ the end of "pass0" for -O2 when call is made to
+ expand_end_target_temps (). Its "in_use" flag has been set
+ to false, so allocate a new temp. */
+ if (target == 0 || (pass == 1 && target == temp_target))
{
/* This will only be assigned once, so it can be readonly. */
tree nt = build_qualified_type (TREE_TYPE (exp),
| TYPE_QUAL_CONST));
target = assign_temp (nt, 0, 1, 1);
+ temp_target = target;
preserve_temp_slots (target);
}
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)
{
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
&& 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_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 ();
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 ();
}
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;
}
+
+/* Traverse an argument list in VALUES and expand all complex
+ arguments into their components. */
+tree
+split_complex_values (tree values)
+{
+ 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))
+ {
+ 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
+ && targetm.calls.split_complex_arg (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;
+
+ /* 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
+ && targetm.calls.split_complex_arg (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;
-#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
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++;
#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
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,
#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);
}
-#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,
#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)
{
/* 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))
- + 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);
}
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;
if (XEXP (x, 0) != current_function_internal_arg_pointer)
i = INTVAL (XEXP (XEXP (x, 0), 1));
- /* expand_call should ensure this */
- if (arg->offset.var || GET_CODE (size_rtx) != CONST_INT)
+ /* expand_call should ensure this. */
+ 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;
}
}
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.
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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