-/* Expands front end tree to back end RTL for GNU C-Compiler
+/* Expands front end tree to back end RTL for GCC.
Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "tree.h"
#include "flags.h"
#include "except.h"
#include "function.h"
#include "expr.h"
+#include "optabs.h"
#include "libfuncs.h"
#include "regs.h"
#include "hard-reg-set.h"
#include "recog.h"
#include "output.h"
#include "basic-block.h"
-#include "obstack.h"
#include "toplev.h"
#include "hashtab.h"
#include "ggc.h"
#define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
#endif
+#ifndef STACK_ALIGNMENT_NEEDED
+#define STACK_ALIGNMENT_NEEDED 1
+#endif
+
/* Some systems use __main in a way incompatible with its use in gcc, in these
cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
give the same symbol without quotes for an alternative entry point. You
must define both, or neither. */
#ifndef NAME__MAIN
#define NAME__MAIN "__main"
-#define SYMBOL__MAIN __main
#endif
/* Round a value to the lowest integer less than it that is a multiple of
post-instantiation libcalls. */
int virtuals_instantiated;
+/* Nonzero if at least one trampoline has been created. */
+int trampolines_created;
+
/* Assign unique numbers to labels generated for profiling, debugging, etc. */
-static int funcdef_no;
+static GTY(()) int funcdef_no;
/* These variables hold pointers to functions to create and destroy
target specific, per-function data structures. */
-struct machine_function * (*init_machine_status) PARAMS ((void));
+struct machine_function * (*init_machine_status) (void);
/* The FUNCTION_DECL for an inline function currently being expanded. */
tree inline_function_decl;
tree type;
/* The value of `sequence_rtl_expr' when this temporary is allocated. */
tree rtl_expr;
- /* Non-zero if this temporary is currently in use. */
+ /* Nonzero if this temporary is currently in use. */
char in_use;
- /* Non-zero if this temporary has its address taken. */
+ /* Nonzero if this temporary has its address taken. */
char addr_taken;
/* Nesting level at which this slot is being used. */
int level;
- /* Non-zero if this should survive a call to free_temp_slots. */
+ /* Nonzero if this should survive a call to free_temp_slots. */
int keep;
/* The offset of the slot from the frame_pointer, including extra space
for alignment. This info is for combine_temp_slots. */
/* Forward declarations. */
-static rtx assign_stack_local_1 PARAMS ((enum machine_mode, HOST_WIDE_INT,
- int, struct function *));
-static struct temp_slot *find_temp_slot_from_address PARAMS ((rtx));
-static void put_reg_into_stack PARAMS ((struct function *, rtx, tree,
- enum machine_mode, enum machine_mode,
- int, unsigned int, int,
- htab_t));
-static void schedule_fixup_var_refs PARAMS ((struct function *, rtx, tree,
- enum machine_mode,
- htab_t));
-static void fixup_var_refs PARAMS ((rtx, enum machine_mode, int, rtx,
- htab_t));
+static rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int,
+ struct function *);
+static struct temp_slot *find_temp_slot_from_address (rtx);
+static void put_reg_into_stack (struct function *, rtx, tree, enum machine_mode,
+ enum machine_mode, int, unsigned int, int, htab_t);
+static void schedule_fixup_var_refs (struct function *, rtx, tree, enum machine_mode,
+ htab_t);
+static void fixup_var_refs (rtx, enum machine_mode, int, rtx, htab_t);
static struct fixup_replacement
- *find_fixup_replacement PARAMS ((struct fixup_replacement **, rtx));
-static void fixup_var_refs_insns PARAMS ((rtx, rtx, enum machine_mode,
- int, int, rtx));
-static void fixup_var_refs_insns_with_hash
- PARAMS ((htab_t, rtx,
- enum machine_mode, int, rtx));
-static void fixup_var_refs_insn PARAMS ((rtx, rtx, enum machine_mode,
- int, int, rtx));
-static void fixup_var_refs_1 PARAMS ((rtx, enum machine_mode, rtx *, rtx,
- struct fixup_replacement **, rtx));
-static rtx fixup_memory_subreg PARAMS ((rtx, rtx, enum machine_mode, int));
-static rtx walk_fixup_memory_subreg PARAMS ((rtx, rtx, enum machine_mode,
- int));
-static rtx fixup_stack_1 PARAMS ((rtx, rtx));
-static void optimize_bit_field PARAMS ((rtx, rtx, rtx *));
-static void instantiate_decls PARAMS ((tree, int));
-static void instantiate_decls_1 PARAMS ((tree, int));
-static void instantiate_decl PARAMS ((rtx, HOST_WIDE_INT, int));
-static rtx instantiate_new_reg PARAMS ((rtx, HOST_WIDE_INT *));
-static int instantiate_virtual_regs_1 PARAMS ((rtx *, rtx, int));
-static void delete_handlers PARAMS ((void));
-static void pad_to_arg_alignment PARAMS ((struct args_size *, int,
- struct args_size *));
-#ifndef ARGS_GROW_DOWNWARD
-static void pad_below PARAMS ((struct args_size *, enum machine_mode,
- tree));
-#endif
-static rtx round_trampoline_addr PARAMS ((rtx));
-static rtx adjust_trampoline_addr PARAMS ((rtx));
-static tree *identify_blocks_1 PARAMS ((rtx, tree *, tree *, tree *));
-static void reorder_blocks_0 PARAMS ((tree));
-static void reorder_blocks_1 PARAMS ((rtx, tree, varray_type *));
-static void reorder_fix_fragments PARAMS ((tree));
-static tree blocks_nreverse PARAMS ((tree));
-static int all_blocks PARAMS ((tree, tree *));
-static tree *get_block_vector PARAMS ((tree, int *));
-extern tree debug_find_var_in_block_tree PARAMS ((tree, tree));
+ *find_fixup_replacement (struct fixup_replacement **, rtx);
+static void fixup_var_refs_insns (rtx, rtx, enum machine_mode, int, int, rtx);
+static void fixup_var_refs_insns_with_hash (htab_t, rtx, enum machine_mode, int, rtx);
+static void fixup_var_refs_insn (rtx, rtx, enum machine_mode, int, int, rtx);
+static void fixup_var_refs_1 (rtx, enum machine_mode, rtx *, rtx,
+ struct fixup_replacement **, rtx);
+static rtx fixup_memory_subreg (rtx, rtx, enum machine_mode, int);
+static rtx walk_fixup_memory_subreg (rtx, rtx, enum machine_mode, int);
+static rtx fixup_stack_1 (rtx, rtx);
+static void optimize_bit_field (rtx, rtx, rtx *);
+static void instantiate_decls (tree, int);
+static void instantiate_decls_1 (tree, int);
+static void instantiate_decl (rtx, HOST_WIDE_INT, int);
+static rtx instantiate_new_reg (rtx, HOST_WIDE_INT *);
+static int instantiate_virtual_regs_1 (rtx *, rtx, int);
+static void delete_handlers (void);
+static void pad_to_arg_alignment (struct args_size *, int, struct args_size *);
+static void pad_below (struct args_size *, enum machine_mode, tree);
+static rtx round_trampoline_addr (rtx);
+static rtx adjust_trampoline_addr (rtx);
+static tree *identify_blocks_1 (rtx, tree *, tree *, tree *);
+static void reorder_blocks_0 (tree);
+static void reorder_blocks_1 (rtx, tree, varray_type *);
+static void reorder_fix_fragments (tree);
+static tree blocks_nreverse (tree);
+static int all_blocks (tree, tree *);
+static tree *get_block_vector (tree, int *);
+extern tree debug_find_var_in_block_tree (tree, tree);
/* We always define `record_insns' even if its not used so that we
can always export `prologue_epilogue_contains'. */
-static void record_insns PARAMS ((rtx, varray_type *)) ATTRIBUTE_UNUSED;
-static int contains PARAMS ((rtx, varray_type));
+static void record_insns (rtx, varray_type *) ATTRIBUTE_UNUSED;
+static int contains (rtx, varray_type);
#ifdef HAVE_return
-static void emit_return_into_block PARAMS ((basic_block, rtx));
+static void emit_return_into_block (basic_block, rtx);
#endif
-static void put_addressof_into_stack PARAMS ((rtx, htab_t));
-static bool purge_addressof_1 PARAMS ((rtx *, rtx, int, int,
- htab_t));
-static void purge_single_hard_subreg_set PARAMS ((rtx));
+static void put_addressof_into_stack (rtx, htab_t);
+static bool purge_addressof_1 (rtx *, rtx, int, int, int, htab_t);
+static void purge_single_hard_subreg_set (rtx);
#if defined(HAVE_epilogue) && defined(INCOMING_RETURN_ADDR_RTX)
-static rtx keep_stack_depressed PARAMS ((rtx));
+static rtx keep_stack_depressed (rtx);
#endif
-static int is_addressof PARAMS ((rtx *, void *));
-static hashval_t insns_for_mem_hash PARAMS ((const void *));
-static int insns_for_mem_comp PARAMS ((const void *, const void *));
-static int insns_for_mem_walk PARAMS ((rtx *, void *));
-static void compute_insns_for_mem PARAMS ((rtx, rtx, htab_t));
-static void prepare_function_start PARAMS ((void));
-static void do_clobber_return_reg PARAMS ((rtx, void *));
-static void do_use_return_reg PARAMS ((rtx, void *));
+static int is_addressof (rtx *, void *);
+static hashval_t insns_for_mem_hash (const void *);
+static int insns_for_mem_comp (const void *, const void *);
+static int insns_for_mem_walk (rtx *, void *);
+static void compute_insns_for_mem (rtx, rtx, htab_t);
+static void prepare_function_start (void);
+static void do_clobber_return_reg (rtx, void *);
+static void do_use_return_reg (rtx, void *);
+static void instantiate_virtual_regs_lossage (rtx);
+static tree split_complex_args (tree);
+static void set_insn_locators (rtx, int) ATTRIBUTE_UNUSED;
\f
/* Pointer to chain of `struct function' for containing functions. */
static GTY(()) struct function *outer_function_chain;
+/* List of insns that were postponed by purge_addressof_1. */
+static rtx postponed_insns;
+
/* Given a function decl for a containing function,
return the `struct function' for it. */
struct function *
-find_function_data (decl)
- tree decl;
+find_function_data (tree decl)
{
struct function *p;
variables. */
void
-push_function_context_to (context)
- tree context;
+push_function_context_to (tree context)
{
struct function *p;
}
void
-push_function_context ()
+push_function_context (void)
{
push_function_context_to (current_function_decl);
}
This function is called from language-specific code. */
void
-pop_function_context_from (context)
- tree context ATTRIBUTE_UNUSED;
+pop_function_context_from (tree context ATTRIBUTE_UNUSED)
{
struct function *p = outer_function_chain;
struct var_refs_queue *queue;
}
void
-pop_function_context ()
+pop_function_context (void)
{
pop_function_context_from (current_function_decl);
}
garbage collection reclaim the memory. */
void
-free_after_parsing (f)
- struct function *f;
+free_after_parsing (struct function *f)
{
/* f->expr->forced_labels is used by code generation. */
/* f->emit->regno_reg_rtx is used by code generation. */
reclaim the memory. */
void
-free_after_compilation (f)
- struct function *f;
+free_after_compilation (struct function *f)
{
f->eh = NULL;
f->expr = NULL;
f->x_nonlocal_goto_stack_level = NULL;
f->x_cleanup_label = NULL;
f->x_return_label = NULL;
+ f->computed_goto_common_label = NULL;
+ f->computed_goto_common_reg = NULL;
f->x_save_expr_regs = NULL;
f->x_stack_slot_list = NULL;
f->x_rtl_expr_chain = NULL;
the caller may have to do that. */
HOST_WIDE_INT
-get_func_frame_size (f)
- struct function *f;
+get_func_frame_size (struct function *f)
{
#ifdef FRAME_GROWS_DOWNWARD
return -f->x_frame_offset;
This size counts from zero. It is not rounded to PREFERRED_STACK_BOUNDARY;
the caller may have to do that. */
HOST_WIDE_INT
-get_frame_size ()
+get_frame_size (void)
{
return get_func_frame_size (cfun);
}
FUNCTION specifies the function to allocate in. */
static rtx
-assign_stack_local_1 (mode, size, align, function)
- enum machine_mode mode;
- HOST_WIDE_INT size;
- int align;
- struct function *function;
+assign_stack_local_1 (enum machine_mode mode, HOST_WIDE_INT size, int align,
+ struct function *function)
{
rtx x, addr;
int bigend_correction = 0;
frame_off = STARTING_FRAME_OFFSET % frame_alignment;
frame_phase = frame_off ? frame_alignment - frame_off : 0;
- /* Round frame offset to that alignment.
- We must be careful here, since FRAME_OFFSET might be negative and
- division with a negative dividend isn't as well defined as we might
- like. So we instead assume that ALIGNMENT is a power of two and
- use logical operations which are unambiguous. */
+ /* Round the frame offset to the specified alignment. The default is
+ to always honor requests to align the stack but a port may choose to
+ do its own stack alignment by defining STACK_ALIGNMENT_NEEDED. */
+ if (STACK_ALIGNMENT_NEEDED
+ || mode != BLKmode
+ || size != 0)
+ {
+ /* We must be careful here, since FRAME_OFFSET might be negative and
+ division with a negative dividend isn't as well defined as we might
+ like. So we instead assume that ALIGNMENT is a power of two and
+ use logical operations which are unambiguous. */
#ifdef FRAME_GROWS_DOWNWARD
- function->x_frame_offset = FLOOR_ROUND (function->x_frame_offset - frame_phase, alignment) + frame_phase;
+ function->x_frame_offset
+ = (FLOOR_ROUND (function->x_frame_offset - frame_phase, alignment)
+ + frame_phase);
#else
- function->x_frame_offset = CEIL_ROUND (function->x_frame_offset - frame_phase, alignment) + frame_phase;
+ function->x_frame_offset
+ = (CEIL_ROUND (function->x_frame_offset - frame_phase, alignment)
+ + frame_phase);
#endif
+ }
/* On a big-endian machine, if we are allocating more space than we will use,
use the least significant bytes of those that are allocated. */
address relative to the frame pointer. */
if (function == cfun && virtuals_instantiated)
addr = plus_constant (frame_pointer_rtx,
+ trunc_int_for_mode
(frame_offset + bigend_correction
- + STARTING_FRAME_OFFSET));
+ + STARTING_FRAME_OFFSET, Pmode));
else
addr = plus_constant (virtual_stack_vars_rtx,
- function->x_frame_offset + bigend_correction);
+ trunc_int_for_mode
+ (function->x_frame_offset + bigend_correction,
+ Pmode));
#ifndef FRAME_GROWS_DOWNWARD
function->x_frame_offset += size;
current function. */
rtx
-assign_stack_local (mode, size, align)
- enum machine_mode mode;
- HOST_WIDE_INT size;
- int align;
+assign_stack_local (enum machine_mode mode, HOST_WIDE_INT size, int align)
{
return assign_stack_local_1 (mode, size, align, cfun);
}
TYPE is the type that will be used for the stack slot. */
rtx
-assign_stack_temp_for_type (mode, size, keep, type)
- enum machine_mode mode;
- HOST_WIDE_INT size;
- int keep;
- tree type;
+assign_stack_temp_for_type (enum machine_mode mode, HOST_WIDE_INT size, int keep,
+ tree type)
{
unsigned int align;
struct temp_slot *p, *best_p = 0;
+ rtx slot;
/* If SIZE is -1 it means that somebody tried to allocate a temporary
of a variable size. */
if (best_p->size - rounded_size >= alignment)
{
- p = (struct temp_slot *) ggc_alloc (sizeof (struct temp_slot));
+ p = ggc_alloc (sizeof (struct temp_slot));
p->in_use = p->addr_taken = 0;
p->size = best_p->size - rounded_size;
p->base_offset = best_p->base_offset + rounded_size;
{
HOST_WIDE_INT frame_offset_old = frame_offset;
- p = (struct temp_slot *) ggc_alloc (sizeof (struct temp_slot));
+ p = ggc_alloc (sizeof (struct temp_slot));
/* We are passing an explicit alignment request to assign_stack_local.
One side effect of that is assign_stack_local will not round SIZE
abort ();
p->slot = assign_stack_local (mode,
(mode == BLKmode
- ? CEIL_ROUND (size, align / BITS_PER_UNIT)
+ ? CEIL_ROUND (size, (int) align / BITS_PER_UNIT)
: size),
align);
p->keep = keep;
}
- /* We may be reusing an old slot, so clear any MEM flags that may have been
- set from before. */
- RTX_UNCHANGING_P (p->slot) = 0;
- MEM_IN_STRUCT_P (p->slot) = 0;
- MEM_SCALAR_P (p->slot) = 0;
- MEM_VOLATILE_P (p->slot) = 0;
- set_mem_alias_set (p->slot, 0);
+
+ /* Create a new MEM rtx to avoid clobbering MEM flags of old slots. */
+ slot = gen_rtx_MEM (mode, XEXP (p->slot, 0));
+ stack_slot_list = gen_rtx_EXPR_LIST (VOIDmode, slot, stack_slot_list);
/* If we know the alias set for the memory that will be used, use
it. If there's no TYPE, then we don't know anything about the
alias set for the memory. */
- set_mem_alias_set (p->slot, type ? get_alias_set (type) : 0);
- set_mem_align (p->slot, align);
+ set_mem_alias_set (slot, type ? get_alias_set (type) : 0);
+ set_mem_align (slot, align);
/* If a type is specified, set the relevant flags. */
if (type != 0)
{
- RTX_UNCHANGING_P (p->slot) = TYPE_READONLY (type);
- MEM_VOLATILE_P (p->slot) = TYPE_VOLATILE (type);
- MEM_SET_IN_STRUCT_P (p->slot, AGGREGATE_TYPE_P (type));
+ RTX_UNCHANGING_P (slot) = (lang_hooks.honor_readonly
+ && TYPE_READONLY (type));
+ MEM_VOLATILE_P (slot) = TYPE_VOLATILE (type);
+ MEM_SET_IN_STRUCT_P (slot, AGGREGATE_TYPE_P (type));
}
- return p->slot;
+ return slot;
}
/* Allocate a temporary stack slot and record it for possible later
reuse. First three arguments are same as in preceding function. */
rtx
-assign_stack_temp (mode, size, keep)
- enum machine_mode mode;
- HOST_WIDE_INT size;
- int keep;
+assign_stack_temp (enum machine_mode mode, HOST_WIDE_INT size, int keep)
{
return assign_stack_temp_for_type (mode, size, keep, NULL_TREE);
}
to wider modes. */
rtx
-assign_temp (type_or_decl, keep, memory_required, dont_promote)
- tree type_or_decl;
- int keep;
- int memory_required;
- int dont_promote ATTRIBUTE_UNUSED;
+assign_temp (tree type_or_decl, int keep, int memory_required,
+ int dont_promote ATTRIBUTE_UNUSED)
{
tree type, decl;
enum machine_mode mode;
if (decl && size == -1
&& TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST)
{
- error_with_decl (decl, "size of variable `%s' is too large");
+ error ("%Hsize of variable '%D' is too large",
+ &DECL_SOURCE_LOCATION (decl), decl);
size = 1;
}
problems in this case. */
void
-combine_temp_slots ()
+combine_temp_slots (void)
{
struct temp_slot *p, *q;
struct temp_slot *prev_p, *prev_q;
/* Find the temp slot corresponding to the object at address X. */
static struct temp_slot *
-find_temp_slot_from_address (x)
- rtx x;
+find_temp_slot_from_address (rtx x)
{
struct temp_slot *p;
rtx next;
that previously was known by OLD. */
void
-update_temp_slot_address (old, new)
- rtx old, new;
+update_temp_slot_address (rtx old, rtx new)
{
struct temp_slot *p;
address was taken. */
void
-mark_temp_addr_taken (x)
- rtx x;
+mark_temp_addr_taken (rtx x)
{
struct temp_slot *p;
returns a value in memory. */
void
-preserve_temp_slots (x)
- rtx x;
+preserve_temp_slots (rtx x)
{
struct temp_slot *p = 0;
RTL_EXPR. */
void
-preserve_rtl_expr_result (x)
- rtx x;
+preserve_rtl_expr_result (rtx x)
{
struct temp_slot *p;
worthwhile. */
void
-free_temp_slots ()
+free_temp_slots (void)
{
struct temp_slot *p;
/* Free all temporary slots used in T, an RTL_EXPR node. */
void
-free_temps_for_rtl_expr (t)
- tree t;
+free_temps_for_rtl_expr (tree t)
{
struct temp_slot *p;
for reuse until the current level is exited. */
void
-mark_all_temps_used ()
+mark_all_temps_used (void)
{
struct temp_slot *p;
/* Push deeper into the nesting level for stack temporaries. */
void
-push_temp_slots ()
+push_temp_slots (void)
{
temp_slot_level++;
}
-/* Likewise, but save the new level as the place to allocate variables
- for blocks. */
-
-#if 0
-void
-push_temp_slots_for_block ()
-{
- push_temp_slots ();
-
- var_temp_slot_level = temp_slot_level;
-}
-
-/* Likewise, but save the new level as the place to allocate temporaries
- for TARGET_EXPRs. */
-
-void
-push_temp_slots_for_target ()
-{
- push_temp_slots ();
-
- target_temp_slot_level = temp_slot_level;
-}
-
-/* Set and get the value of target_temp_slot_level. The only
- permitted use of these functions is to save and restore this value. */
-
-int
-get_target_temp_slot_level ()
-{
- return target_temp_slot_level;
-}
-
-void
-set_target_temp_slot_level (level)
- int level;
-{
- target_temp_slot_level = level;
-}
-#endif
-
/* Pop a temporary nesting level. All slots in use in the current level
are freed. */
void
-pop_temp_slots ()
+pop_temp_slots (void)
{
struct temp_slot *p;
/* Initialize temporary slots. */
void
-init_temp_slots ()
+init_temp_slots (void)
{
/* We have not allocated any temporaries yet. */
temp_slots = 0;
target_temp_slot_level = 0;
}
\f
-/* Retroactively move an auto variable from a register to a stack slot.
- This is done when an address-reference to the variable is seen. */
+/* Retroactively move an auto variable from a register to a stack
+ slot. This is done when an address-reference to the variable is
+ seen. If RESCAN is true, all previously emitted instructions are
+ examined and modified to handle the fact that DECL is now
+ addressable. */
void
-put_var_into_stack (decl)
- tree decl;
+put_var_into_stack (tree decl, int rescan)
{
rtx reg;
enum machine_mode promoted_mode, decl_mode;
to put things in the stack for the sake of setjmp, try to keep it
in a register until we know we actually need the address. */
if (can_use_addressof)
- gen_mem_addressof (reg, decl);
+ gen_mem_addressof (reg, decl, rescan);
else
put_reg_into_stack (function, reg, TREE_TYPE (decl), promoted_mode,
decl_mode, volatilep, 0, usedp, 0);
/* Prevent sharing of rtl that might lose. */
if (GET_CODE (XEXP (reg, 0)) == PLUS)
XEXP (reg, 0) = copy_rtx (XEXP (reg, 0));
- if (usedp)
+ if (usedp && rescan)
{
schedule_fixup_var_refs (function, reg, TREE_TYPE (decl),
promoted_mode, 0);
USED_P is nonzero if this reg might have already been used in an insn. */
static void
-put_reg_into_stack (function, reg, type, promoted_mode, decl_mode, volatile_p,
- original_regno, used_p, ht)
- struct function *function;
- rtx reg;
- tree type;
- enum machine_mode promoted_mode, decl_mode;
- int volatile_p;
- unsigned int original_regno;
- int used_p;
- htab_t ht;
+put_reg_into_stack (struct function *function, rtx reg, tree type,
+ enum machine_mode promoted_mode, enum machine_mode decl_mode,
+ int volatile_p, unsigned int original_regno, int used_p, htab_t ht)
{
struct function *func = function ? function : cfun;
rtx new = 0;
See function above for meaning of arguments. */
static void
-schedule_fixup_var_refs (function, reg, type, promoted_mode, ht)
- struct function *function;
- rtx reg;
- tree type;
- enum machine_mode promoted_mode;
- htab_t ht;
+schedule_fixup_var_refs (struct function *function, rtx reg, tree type,
+ enum machine_mode promoted_mode, htab_t ht)
{
int unsigned_p = type ? TREE_UNSIGNED (type) : 0;
{
struct var_refs_queue *temp;
- temp
- = (struct var_refs_queue *) ggc_alloc (sizeof (struct var_refs_queue));
+ temp = ggc_alloc (sizeof (struct var_refs_queue));
temp->modified = reg;
temp->promoted_mode = promoted_mode;
temp->unsignedp = unsigned_p;
}
\f
static void
-fixup_var_refs (var, promoted_mode, unsignedp, may_share, ht)
- rtx var;
- enum machine_mode promoted_mode;
- int unsignedp;
- htab_t ht;
- rtx may_share;
+fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
+ rtx may_share, htab_t ht)
{
tree pending;
rtx first_insn = get_insns ();
value is equal to X. Allocate a new structure if no such entry exists. */
static struct fixup_replacement *
-find_fixup_replacement (replacements, x)
- struct fixup_replacement **replacements;
- rtx x;
+find_fixup_replacement (struct fixup_replacement **replacements, rtx x)
{
struct fixup_replacement *p;
if (p == 0)
{
- p = (struct fixup_replacement *) xmalloc (sizeof (struct fixup_replacement));
+ p = xmalloc (sizeof (struct fixup_replacement));
p->old = x;
p->new = 0;
p->next = *replacements;
to be unshared or a list of them. */
static void
-fixup_var_refs_insns (insn, var, promoted_mode, unsignedp, toplevel, may_share)
- rtx insn;
- rtx var;
- enum machine_mode promoted_mode;
- int unsignedp;
- int toplevel;
- rtx may_share;
+fixup_var_refs_insns (rtx insn, rtx var, enum machine_mode promoted_mode,
+ int unsignedp, int toplevel, rtx may_share)
{
while (insn)
{
(inside the CALL_PLACEHOLDER). */
static void
-fixup_var_refs_insns_with_hash (ht, var, promoted_mode, unsignedp, may_share)
- htab_t ht;
- rtx var;
- enum machine_mode promoted_mode;
- int unsignedp;
- rtx may_share;
+fixup_var_refs_insns_with_hash (htab_t ht, rtx var, enum machine_mode promoted_mode,
+ int unsignedp, rtx may_share)
{
struct insns_for_mem_entry tmp;
struct insns_for_mem_entry *ime;
rtx insn_list;
tmp.key = var;
- ime = (struct insns_for_mem_entry *) htab_find (ht, &tmp);
+ ime = htab_find (ht, &tmp);
for (insn_list = ime->insns; insn_list != 0; insn_list = XEXP (insn_list, 1))
if (INSN_P (XEXP (insn_list, 0)))
fixup_var_refs_insn (XEXP (insn_list, 0), var, promoted_mode,
function. */
static void
-fixup_var_refs_insn (insn, var, promoted_mode, unsignedp, toplevel, no_share)
- rtx insn;
- rtx var;
- enum machine_mode promoted_mode;
- int unsignedp;
- int toplevel;
- rtx no_share;
+fixup_var_refs_insn (rtx insn, rtx var, enum machine_mode promoted_mode,
+ int unsignedp, int toplevel, rtx no_share)
{
rtx call_dest = 0;
rtx set, prev, prev_set;
or the SUBREG, as appropriate, to the pseudo. */
static void
-fixup_var_refs_1 (var, promoted_mode, loc, insn, replacements, no_share)
- rtx var;
- enum machine_mode promoted_mode;
- rtx *loc;
- rtx insn;
- struct fixup_replacement **replacements;
- rtx no_share;
+fixup_var_refs_1 (rtx var, enum machine_mode promoted_mode, rtx *loc, rtx insn,
+ struct fixup_replacement **replacements, rtx no_share)
{
int i;
rtx x = *loc;
copy SET_SRC (x) to SET_DEST (x) in some way. So
we generate the move and see whether it requires more
than one insn. If it does, we emit those insns and
- delete INSN. Otherwise, we an just replace the pattern
+ delete INSN. Otherwise, we can just replace the pattern
of INSN; we have already verified above that INSN has
no other function that to do X. */
This is used for subregs found inside REG_NOTES. */
static rtx
-fixup_memory_subreg (x, insn, promoted_mode, uncritical)
- rtx x;
- rtx insn;
- enum machine_mode promoted_mode;
- int uncritical;
+fixup_memory_subreg (rtx x, rtx insn, enum machine_mode promoted_mode, int uncritical)
{
int offset;
rtx mem = SUBREG_REG (x);
fixup_memory_subreg. */
static rtx
-walk_fixup_memory_subreg (x, insn, promoted_mode, uncritical)
- rtx x;
- rtx insn;
- enum machine_mode promoted_mode;
- int uncritical;
+walk_fixup_memory_subreg (rtx x, rtx insn, enum machine_mode promoted_mode,
+ int uncritical)
{
enum rtx_code code;
const char *fmt;
Replace each such MEM rtx with a copy, to avoid clobberage. */
static rtx
-fixup_stack_1 (x, insn)
- rtx x;
- rtx insn;
+fixup_stack_1 (rtx x, rtx insn)
{
int i;
RTX_CODE code = GET_CODE (x);
is always 0.) */
static void
-optimize_bit_field (body, insn, equiv_mem)
- rtx body;
- rtx insn;
- rtx *equiv_mem;
+optimize_bit_field (rtx body, rtx insn, rtx *equiv_mem)
{
rtx bitfield;
int destflag;
#define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
#endif
-/* Build up a (MEM (ADDRESSOF (REG))) rtx for a register REG that just had its
- address taken. DECL is the decl or SAVE_EXPR for the object stored in the
- register, for later use if we do need to force REG into the stack. REG is
- overwritten by the MEM like in put_reg_into_stack. */
+/* Build up a (MEM (ADDRESSOF (REG))) rtx for a register REG that just
+ had its address taken. DECL is the decl or SAVE_EXPR for the
+ object stored in the register, for later use if we do need to force
+ REG into the stack. REG is overwritten by the MEM like in
+ put_reg_into_stack. RESCAN is true if previously emitted
+ instructions must be rescanned and modified now that the REG has
+ been transformed. */
rtx
-gen_mem_addressof (reg, decl)
- rtx reg;
- tree decl;
+gen_mem_addressof (rtx reg, tree decl, int rescan)
{
rtx r = gen_rtx_ADDRESSOF (Pmode, gen_reg_rtx (GET_MODE (reg)),
REGNO (reg), decl);
if (DECL_P (decl) && decl_rtl == reg)
SET_DECL_RTL (decl, reg);
- if (TREE_USED (decl) || (DECL_P (decl) && DECL_INITIAL (decl) != 0))
+ if (rescan
+ && (TREE_USED (decl) || (DECL_P (decl) && DECL_INITIAL (decl) != 0)))
fixup_var_refs (reg, GET_MODE (reg), TREE_UNSIGNED (type), reg, 0);
}
- else
+ else if (rescan)
fixup_var_refs (reg, GET_MODE (reg), 0, reg, 0);
return reg;
/* If DECL has an RTL that is an ADDRESSOF rtx, put it into the stack. */
void
-flush_addressof (decl)
- tree decl;
+flush_addressof (tree decl)
{
if ((TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == VAR_DECL)
&& DECL_RTL (decl) != 0
/* Force the register pointed to by R, an ADDRESSOF rtx, into the stack. */
static void
-put_addressof_into_stack (r, ht)
- rtx r;
- htab_t ht;
+put_addressof_into_stack (rtx r, htab_t ht)
{
tree decl, type;
int volatile_p, used_p;
/* Helper function for purge_addressof. See if the rtx expression at *LOC
in INSN needs to be changed. If FORCE, always put any ADDRESSOFs into
the stack. If the function returns FALSE then the replacement could not
- be made. */
+ be made. If MAY_POSTPONE is true and we would not put the addressof
+ to stack, postpone processing of the insn. */
static bool
-purge_addressof_1 (loc, insn, force, store, ht)
- rtx *loc;
- rtx insn;
- int force, store;
- htab_t ht;
+purge_addressof_1 (rtx *loc, rtx insn, int force, int store, int may_postpone,
+ htab_t ht)
{
rtx x;
RTX_CODE code;
memory. */
if (code == SET)
{
- result = purge_addressof_1 (&SET_DEST (x), insn, force, 1, ht);
- result &= purge_addressof_1 (&SET_SRC (x), insn, force, 0, ht);
+ result = purge_addressof_1 (&SET_DEST (x), insn, force, 1,
+ may_postpone, ht);
+ result &= purge_addressof_1 (&SET_SRC (x), insn, force, 0,
+ may_postpone, ht);
return result;
}
else if (code == ADDRESSOF)
rtx sub, insns;
if (GET_CODE (XEXP (x, 0)) != MEM)
- {
- put_addressof_into_stack (x, ht);
- return true;
- }
+ put_addressof_into_stack (x, ht);
/* We must create a copy of the rtx because it was created by
overwriting a REG rtx which is always shared. */
return true;
start_sequence ();
- sub = force_operand (sub, NULL_RTX);
+
+ /* If SUB is a hard or virtual register, try it as a pseudo-register.
+ Otherwise, perhaps SUB is an expression, so generate code to compute
+ it. */
+ if (GET_CODE (sub) == REG && REGNO (sub) <= LAST_VIRTUAL_REGISTER)
+ sub = copy_to_reg (sub);
+ else
+ sub = force_operand (sub, NULL_RTX);
+
if (! validate_change (insn, loc, sub, 0)
&& ! validate_replace_rtx (x, sub, insn))
abort ();
{
int size_x, size_sub;
+ if (may_postpone)
+ {
+ /* Postpone for now, so that we do not emit bitfield arithmetics
+ unless there is some benefit from it. */
+ if (!postponed_insns || XEXP (postponed_insns, 0) != insn)
+ postponed_insns = alloc_INSN_LIST (insn, postponed_insns);
+ return true;
+ }
+
if (!insn)
{
/* When processing REG_NOTES look at the list of
return true;
}
+ /* When we are processing the REG_NOTES of the last instruction
+ of a libcall, there will be typically no replacements
+ for that insn; the replacements happened before, piecemeal
+ fashion. OTOH we are not interested in the details of
+ this for the REG_EQUAL note, we want to know the big picture,
+ which can be succinctly described with a simple SUBREG.
+ Note that removing the REG_EQUAL note is not an option
+ on the last insn of a libcall, so we must do a replacement. */
+ if (! purge_addressof_replacements
+ && ! purge_bitfield_addressof_replacements)
+ {
+ /* In compile/990107-1.c:7 compiled at -O1 -m1 for sh-elf,
+ we got
+ (mem:DI (addressof:SI (reg/v:DF 160) 159 0x401c8510)
+ [0 S8 A32]), which can be expressed with a simple
+ same-size subreg */
+ if ((GET_MODE_SIZE (GET_MODE (x))
+ == GET_MODE_SIZE (GET_MODE (sub)))
+ /* Again, invalid pointer casts (as in
+ compile/990203-1.c) can require paradoxical
+ subregs. */
+ || (GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD
+ && (GET_MODE_SIZE (GET_MODE (x))
+ > GET_MODE_SIZE (GET_MODE (sub)))))
+ {
+ *loc = gen_rtx_SUBREG (GET_MODE (x), sub, 0);
+ return true;
+ }
+ /* ??? Are there other cases we should handle? */
+ }
/* Sometimes we may not be able to find the replacement. For
example when the original insn was a MEM in a wider mode,
and the note is part of a sign extension of a narrowed
size_x = GET_MODE_BITSIZE (GET_MODE (x));
size_sub = GET_MODE_BITSIZE (GET_MODE (sub));
+ /* Do not frob unchanging MEMs. If a later reference forces the
+ pseudo to the stack, we can wind up with multiple writes to
+ an unchanging memory, which is invalid. */
+ if (RTX_UNCHANGING_P (x) && size_x != size_sub)
+ ;
+
/* Don't even consider working with paradoxical subregs,
or the moral equivalent seen here. */
- if (size_x <= size_sub
- && int_mode_for_mode (GET_MODE (sub)) != BLKmode)
+ else if (size_x <= size_sub
+ && int_mode_for_mode (GET_MODE (sub)) != BLKmode)
{
/* Do a bitfield insertion to mirror what would happen
in memory. */
for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++)
{
if (*fmt == 'e')
- result &= purge_addressof_1 (&XEXP (x, i), insn, force, 0, ht);
+ result &= purge_addressof_1 (&XEXP (x, i), insn, force, 0,
+ may_postpone, ht);
else if (*fmt == 'E')
for (j = 0; j < XVECLEN (x, i); j++)
- result &= purge_addressof_1 (&XVECEXP (x, i, j), insn, force, 0, ht);
+ result &= purge_addressof_1 (&XVECEXP (x, i, j), insn, force, 0,
+ may_postpone, ht);
}
return result;
/* Return a hash value for K, a REG. */
static hashval_t
-insns_for_mem_hash (k)
- const void * k;
+insns_for_mem_hash (const void *k)
{
/* Use the address of the key for the hash value. */
struct insns_for_mem_entry *m = (struct insns_for_mem_entry *) k;
- return (hashval_t) m->key;
+ return htab_hash_pointer (m->key);
}
-/* Return non-zero if K1 and K2 (two REGs) are the same. */
+/* Return nonzero if K1 and K2 (two REGs) are the same. */
static int
-insns_for_mem_comp (k1, k2)
- const void * k1;
- const void * k2;
+insns_for_mem_comp (const void *k1, const void *k2)
{
struct insns_for_mem_entry *m1 = (struct insns_for_mem_entry *) k1;
struct insns_for_mem_entry *m2 = (struct insns_for_mem_entry *) k2;
insns_for_mem_walk_info structure). */
static int
-insns_for_mem_walk (r, data)
- rtx *r;
- void *data;
+insns_for_mem_walk (rtx *r, void *data)
{
struct insns_for_mem_walk_info *ifmwi
= (struct insns_for_mem_walk_info *) data;
if (ifmwi->pass == 0 && *r && GET_CODE (*r) == ADDRESSOF
&& GET_CODE (XEXP (*r, 0)) == REG)
{
- PTR *e;
+ void **e;
tmp.key = XEXP (*r, 0);
e = htab_find_slot (ifmwi->ht, &tmp, INSERT);
if (*e == NULL)
{
struct insns_for_mem_entry *ifme;
tmp.key = *r;
- ifme = (struct insns_for_mem_entry *) htab_find (ifmwi->ht, &tmp);
+ ifme = htab_find (ifmwi->ht, &tmp);
/* If we have not already recorded this INSN, do so now. Since
we process the INSNs in order, we know that if we have
which REGs in HT. */
static void
-compute_insns_for_mem (insns, last_insn, ht)
- rtx insns;
- rtx last_insn;
- htab_t ht;
+compute_insns_for_mem (rtx insns, rtx last_insn, htab_t ht)
{
rtx insn;
struct insns_for_mem_walk_info ifmwi;
Returns true iff the rtl is an ADDRESSOF. */
static int
-is_addressof (rtl, data)
- rtx *rtl;
- void *data ATTRIBUTE_UNUSED;
+is_addressof (rtx *rtl, void *data ATTRIBUTE_UNUSED)
{
return GET_CODE (*rtl) == ADDRESSOF;
}
stack. */
void
-purge_addressof (insns)
- rtx insns;
+purge_addressof (rtx insns)
{
- rtx insn;
+ rtx insn, tmp;
htab_t ht;
/* When we actually purge ADDRESSOFs, we turn REGs into MEMs. That
ht = htab_create_ggc (1000, insns_for_mem_hash, insns_for_mem_comp, NULL);
compute_insns_for_mem (insns, NULL_RTX, ht);
+ postponed_insns = NULL;
+
for (insn = insns; insn; insn = NEXT_INSN (insn))
- if (GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN
- || GET_CODE (insn) == CALL_INSN)
+ if (INSN_P (insn))
{
if (! purge_addressof_1 (&PATTERN (insn), insn,
- asm_noperands (PATTERN (insn)) > 0, 0, ht))
+ asm_noperands (PATTERN (insn)) > 0, 0, 1, ht))
/* If we could not replace the ADDRESSOFs in the insn,
something is wrong. */
abort ();
- if (! purge_addressof_1 (®_NOTES (insn), NULL_RTX, 0, 0, ht))
+ if (! purge_addressof_1 (®_NOTES (insn), NULL_RTX, 0, 0, 0, ht))
{
/* If we could not replace the ADDRESSOFs in the insn's notes,
we can just remove the offending notes instead. */
}
}
+ /* Process the postponed insns. */
+ while (postponed_insns)
+ {
+ insn = XEXP (postponed_insns, 0);
+ tmp = postponed_insns;
+ postponed_insns = XEXP (postponed_insns, 1);
+ free_INSN_LIST_node (tmp);
+
+ if (! purge_addressof_1 (&PATTERN (insn), insn,
+ asm_noperands (PATTERN (insn)) > 0, 0, 0, ht))
+ abort ();
+ }
+
/* Clean up. */
purge_bitfield_addressof_replacements = 0;
purge_addressof_replacements = 0;
register. A subroutine of purge_hard_subreg_sets. */
static void
-purge_single_hard_subreg_set (pattern)
- rtx pattern;
+purge_single_hard_subreg_set (rtx pattern)
{
rtx reg = SET_DEST (pattern);
enum machine_mode mode = GET_MODE (SET_DEST (pattern));
of hard registers. */
void
-purge_hard_subreg_sets (insn)
- rtx insn;
+purge_hard_subreg_sets (rtx insn)
{
for (; insn; insn = NEXT_INSN (insn))
{
references to hard register references. */
void
-instantiate_virtual_regs (fndecl, insns)
- tree fndecl;
- rtx insns;
+instantiate_virtual_regs (tree fndecl, rtx insns)
{
rtx insn;
unsigned int i;
|| GET_CODE (insn) == CALL_INSN)
{
instantiate_virtual_regs_1 (&PATTERN (insn), insn, 1);
+ if (INSN_DELETED_P (insn))
+ continue;
instantiate_virtual_regs_1 (®_NOTES (insn), NULL_RTX, 0);
/* Instantiate any virtual registers in CALL_INSN_FUNCTION_USAGE. */
if (GET_CODE (insn) == CALL_INSN)
instantiate_virtual_regs_1 (&CALL_INSN_FUNCTION_USAGE (insn),
NULL_RTX, 0);
+
+ /* Past this point all ASM statements should match. Verify that
+ to avoid failures later in the compilation process. */
+ if (asm_noperands (PATTERN (insn)) >= 0
+ && ! check_asm_operands (PATTERN (insn)))
+ instantiate_virtual_regs_lossage (insn);
}
/* Instantiate the stack slots for the parm registers, for later use in
Otherwise, always do it. */
static void
-instantiate_decls (fndecl, valid_only)
- tree fndecl;
- int valid_only;
+instantiate_decls (tree fndecl, int valid_only)
{
tree decl;
BLOCK node and all its subblocks. */
static void
-instantiate_decls_1 (let, valid_only)
- tree let;
- int valid_only;
+instantiate_decls_1 (tree let, int valid_only)
{
tree t;
/* Subroutine of the preceding procedures: Given RTL representing a
decl and the size of the object, do any instantiation required.
- If VALID_ONLY is non-zero, it means that the RTL should only be
+ If VALID_ONLY is nonzero, it means that the RTL should only be
changed if the new address is valid. */
static void
-instantiate_decl (x, size, valid_only)
- rtx x;
- HOST_WIDE_INT size;
- int valid_only;
+instantiate_decl (rtx x, HOST_WIDE_INT size, int valid_only)
{
enum machine_mode mode;
rtx addr;
offset indirectly through the pointer. Otherwise, return 0. */
static rtx
-instantiate_new_reg (x, poffset)
- rtx x;
- HOST_WIDE_INT *poffset;
+instantiate_new_reg (rtx x, HOST_WIDE_INT *poffset)
{
rtx new;
HOST_WIDE_INT offset;
return new;
}
\f
+
+/* Called when instantiate_virtual_regs has failed to update the instruction.
+ Usually this means that non-matching instruction has been emit, however for
+ asm statements it may be the problem in the constraints. */
+static void
+instantiate_virtual_regs_lossage (rtx insn)
+{
+ if (asm_noperands (PATTERN (insn)) >= 0)
+ {
+ error_for_asm (insn, "impossible constraint in `asm'");
+ delete_insn (insn);
+ }
+ else
+ abort ();
+}
/* Given a pointer to a piece of rtx and an optional pointer to the
containing object, instantiate any virtual registers present in it.
pseudos. */
static int
-instantiate_virtual_regs_1 (loc, object, extra_insns)
- rtx *loc;
- rtx object;
- int extra_insns;
+instantiate_virtual_regs_1 (rtx *loc, rtx object, int extra_insns)
{
rtx x;
RTX_CODE code;
if (x == 0)
return 1;
+ /* We may have detected and deleted invalid asm statements. */
+ if (object && INSN_P (object) && INSN_DELETED_P (object))
+ return 1;
+
code = GET_CODE (x);
/* Check for some special cases. */
/* The only valid sources here are PLUS or REG. Just do
the simplest possible thing to handle them. */
if (GET_CODE (src) != REG && GET_CODE (src) != PLUS)
- abort ();
+ {
+ instantiate_virtual_regs_lossage (object);
+ return 1;
+ }
start_sequence ();
if (GET_CODE (src) != REG)
if (! validate_change (object, &SET_SRC (x), temp, 0)
|| ! extra_insns)
- abort ();
+ instantiate_virtual_regs_lossage (object);
return 1;
}
emit_insn_before (seq, object);
if (! validate_change (object, loc, temp, 0)
&& ! validate_replace_rtx (x, temp, object))
- abort ();
+ {
+ instantiate_virtual_regs_lossage (object);
+ return 1;
+ }
}
}
case ABS:
case SQRT:
case FFS:
+ case CLZ: case CTZ:
+ case POPCOUNT: case PARITY:
/* These case either have just one operand or we know that we need not
check the rest of the operands. */
loc = &XEXP (x, 0);
emit_insn_before (seq, object);
if (! validate_change (object, loc, temp, 0)
&& ! validate_replace_rtx (x, temp, object))
- abort ();
+ instantiate_virtual_regs_lossage (object);
}
}
and disestablish them. */
static void
-delete_handlers ()
+delete_handlers (void)
{
rtx insn;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
}
}
\f
-int
-max_parm_reg_num ()
-{
- return max_parm_reg;
-}
-
/* Return the first insn following those generated by `assign_parms'. */
rtx
-get_first_nonparm_insn ()
+get_first_nonparm_insn (void)
{
if (last_parm_insn)
return NEXT_INSN (last_parm_insn);
return get_insns ();
}
-/* Return the first NOTE_INSN_BLOCK_BEG note in the function.
- Crash if there is none. */
-
-rtx
-get_first_block_beg ()
-{
- rtx searcher;
- rtx insn = get_first_nonparm_insn ();
-
- for (searcher = insn; searcher; searcher = NEXT_INSN (searcher))
- if (GET_CODE (searcher) == NOTE
- && NOTE_LINE_NUMBER (searcher) == NOTE_INSN_BLOCK_BEG)
- return searcher;
-
- abort (); /* Invalid call to this function. (See comments above.) */
- return NULL_RTX;
-}
-
/* Return 1 if EXP is an aggregate type (or a value with aggregate type).
This means a type for which function calls must pass an address to the
function or get an address back from the function.
EXP may be a type node or an expression (whose type is tested). */
int
-aggregate_value_p (exp)
- tree exp;
+aggregate_value_p (tree exp)
{
int i, regno, nregs;
rtx reg;
those registers as the RTL for them. */
void
-assign_parms (fndecl)
- tree fndecl;
+assign_parms (tree fndecl)
{
tree parm;
- rtx entry_parm = 0;
- rtx stack_parm = 0;
CUMULATIVE_ARGS args_so_far;
- enum machine_mode promoted_mode, passed_mode;
- enum machine_mode nominal_mode, promoted_nominal_mode;
- int unsignedp;
/* Total space needed so far for args on the stack,
given as a constant and a tree-expression. */
struct args_size stack_args_size;
tree fntype = TREE_TYPE (fndecl);
- tree fnargs = DECL_ARGUMENTS (fndecl);
+ tree fnargs = DECL_ARGUMENTS (fndecl), orig_fnargs;
/* This is used for the arg pointer when referring to stack args. */
rtx internal_arg_pointer;
/* This is a dummy PARM_DECL that we used for the function result if
#ifdef SETUP_INCOMING_VARARGS
int varargs_setup = 0;
#endif
+ int reg_parm_stack_space = 0;
rtx conversion_insns = 0;
- struct args_size alignment_pad;
-
- /* Nonzero if the last arg is named `__builtin_va_alist',
- which is used on some machines for old-fashioned non-ANSI varargs.h;
- this should be stuck onto the stack as if it had arrived there. */
- int hide_last_arg
- = (current_function_varargs
- && fnargs
- && (parm = tree_last (fnargs)) != 0
- && DECL_NAME (parm)
- && (! strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
- "__builtin_va_alist")));
/* Nonzero if function takes extra anonymous args.
This means the last named arg must be on the stack
fnargs = function_result_decl;
}
+ orig_fnargs = fnargs;
+
max_parm_reg = LAST_VIRTUAL_REGISTER + 1;
- parm_reg_stack_loc = (rtx *) ggc_alloc_cleared (max_parm_reg * sizeof (rtx));
+ parm_reg_stack_loc = ggc_alloc_cleared (max_parm_reg * sizeof (rtx));
+
+ if (SPLIT_COMPLEX_ARGS)
+ fnargs = split_complex_args (fnargs);
+
+#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
#ifdef INIT_CUMULATIVE_INCOMING_ARGS
INIT_CUMULATIVE_INCOMING_ARGS (args_so_far, fntype, NULL_RTX);
#else
- INIT_CUMULATIVE_ARGS (args_so_far, fntype, NULL_RTX, 0);
+ INIT_CUMULATIVE_ARGS (args_so_far, fntype, NULL_RTX, fndecl);
#endif
/* We haven't yet found an argument that we must push and pretend the
for (parm = fnargs; parm; parm = TREE_CHAIN (parm))
{
- struct args_size stack_offset;
- struct args_size arg_size;
+ rtx entry_parm;
+ rtx stack_parm;
+ enum machine_mode promoted_mode, passed_mode;
+ enum machine_mode nominal_mode, promoted_nominal_mode;
+ int unsignedp;
+ struct locate_and_pad_arg_data locate;
int passed_pointer = 0;
int did_conversion = 0;
tree passed_type = DECL_ARG_TYPE (parm);
tree nominal_type = TREE_TYPE (parm);
- int pretend_named;
int last_named = 0, named_arg;
+ int in_regs;
+ int partial = 0;
/* Set LAST_NAMED if this is last named arg before last
anonymous args. */
- if (stdarg || current_function_varargs)
+ if (stdarg)
{
tree tem;
continue;
}
- /* For varargs.h function, save info about regs and stack space
- used by the individual args, not including the va_alist arg. */
- if (hide_last_arg && last_named)
- current_function_args_info = args_so_far;
-
/* Find mode of arg as it is passed, and mode of arg
as it should be during execution of this function. */
passed_mode = TYPE_MODE (passed_type);
object itself or if the machine requires these objects be passed
that way. */
- if ((TREE_CODE (TYPE_SIZE (passed_type)) != INTEGER_CST
- && contains_placeholder_p (TYPE_SIZE (passed_type)))
+ if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (passed_type))
|| TREE_ADDRESSABLE (passed_type)
#ifdef FUNCTION_ARG_PASS_BY_REFERENCE
|| FUNCTION_ARG_PASS_BY_REFERENCE (args_so_far, passed_mode,
- passed_type, named_arg)
+ passed_type, named_arg)
#endif
)
{
passed_pointer = 1;
passed_mode = nominal_mode = Pmode;
}
+ /* See if the frontend wants to pass this by invisible reference. */
+ else if (passed_type != nominal_type
+ && POINTER_TYPE_P (passed_type)
+ && TREE_TYPE (passed_type) == nominal_type)
+ {
+ nominal_type = passed_type;
+ passed_pointer = 1;
+ passed_mode = nominal_mode = Pmode;
+ }
promoted_mode = passed_mode;
it came in a register so that REG_PARM_STACK_SPACE isn't skipped.
In this case, we call FUNCTION_ARG with NAMED set to 1 instead of
0 as it was the previous time. */
-
- pretend_named = named_arg || PRETEND_OUTGOING_VARARGS_NAMED;
- locate_and_pad_parm (promoted_mode, passed_type,
+ in_regs = entry_parm != 0;
#ifdef STACK_PARMS_IN_REG_PARM_AREA
- 1,
-#else
+ in_regs = 1;
+#endif
+ if (!in_regs && !named_arg)
+ {
+ int pretend_named = PRETEND_OUTGOING_VARARGS_NAMED;
+ if (pretend_named)
+ {
#ifdef FUNCTION_INCOMING_ARG
- FUNCTION_INCOMING_ARG (args_so_far, promoted_mode,
- passed_type,
- pretend_named) != 0,
+ in_regs = FUNCTION_INCOMING_ARG (args_so_far, promoted_mode,
+ passed_type,
+ pretend_named) != 0;
#else
- FUNCTION_ARG (args_so_far, promoted_mode,
- passed_type,
- pretend_named) != 0,
+ in_regs = FUNCTION_ARG (args_so_far, promoted_mode,
+ passed_type,
+ pretend_named) != 0;
#endif
+ }
+ }
+
+ /* If this parameter was passed both in registers and in the stack,
+ use the copy on the stack. */
+ if (MUST_PASS_IN_STACK (promoted_mode, passed_type))
+ entry_parm = 0;
+
+#ifdef FUNCTION_ARG_PARTIAL_NREGS
+ if (entry_parm)
+ partial = FUNCTION_ARG_PARTIAL_NREGS (args_so_far, promoted_mode,
+ passed_type, named_arg);
#endif
- fndecl, &stack_args_size, &stack_offset, &arg_size,
- &alignment_pad);
+
+ memset (&locate, 0, sizeof (locate));
+ locate_and_pad_parm (promoted_mode, passed_type, in_regs,
+ entry_parm ? partial : 0, fndecl,
+ &stack_args_size, &locate);
{
- rtx offset_rtx = ARGS_SIZE_RTX (stack_offset);
+ rtx offset_rtx;
+
+ /* If we're passing this arg using a reg, make its stack home
+ the aligned stack slot. */
+ if (entry_parm)
+ offset_rtx = ARGS_SIZE_RTX (locate.slot_offset);
+ else
+ offset_rtx = ARGS_SIZE_RTX (locate.offset);
if (offset_rtx == const0_rtx)
stack_parm = gen_rtx_MEM (promoted_mode, internal_arg_pointer);
offset_rtx));
set_mem_attributes (stack_parm, parm, 1);
- }
+ if (entry_parm && MEM_ATTRS (stack_parm)->align < PARM_BOUNDARY)
+ set_mem_align (stack_parm, PARM_BOUNDARY);
- /* If this parameter was passed both in registers and in the stack,
- use the copy on the stack. */
- if (MUST_PASS_IN_STACK (promoted_mode, passed_type))
- entry_parm = 0;
+ /* Set also REG_ATTRS if parameter was passed in a register. */
+ if (entry_parm)
+ set_reg_attrs_for_parm (entry_parm, stack_parm);
+ }
-#ifdef FUNCTION_ARG_PARTIAL_NREGS
/* If this parm was passed part in regs and part in memory,
pretend it arrived entirely in memory
by pushing the register-part onto the stack.
we could put it together in a pseudoreg directly,
but for now that's not worth bothering with. */
- if (entry_parm)
+ if (partial)
{
- int nregs = FUNCTION_ARG_PARTIAL_NREGS (args_so_far, promoted_mode,
- passed_type, named_arg);
-
- if (nregs > 0)
- {
- current_function_pretend_args_size
- = (((nregs * UNITS_PER_WORD) + (PARM_BOUNDARY / BITS_PER_UNIT) - 1)
- / (PARM_BOUNDARY / BITS_PER_UNIT)
- * (PARM_BOUNDARY / BITS_PER_UNIT));
+#ifndef MAYBE_REG_PARM_STACK_SPACE
+ /* When REG_PARM_STACK_SPACE is nonzero, stack space for
+ split parameters was allocated by our caller, so we
+ won't be pushing it in the prolog. */
+ if (reg_parm_stack_space == 0)
+#endif
+ current_function_pretend_args_size
+ = (((partial * UNITS_PER_WORD) + (PARM_BOUNDARY / BITS_PER_UNIT) - 1)
+ / (PARM_BOUNDARY / BITS_PER_UNIT)
+ * (PARM_BOUNDARY / BITS_PER_UNIT));
- /* Handle calls that pass values in multiple non-contiguous
- locations. The Irix 6 ABI has examples of this. */
- if (GET_CODE (entry_parm) == PARALLEL)
- emit_group_store (validize_mem (stack_parm), entry_parm,
- int_size_in_bytes (TREE_TYPE (parm)));
+ /* Handle calls that pass values in multiple non-contiguous
+ locations. The Irix 6 ABI has examples of this. */
+ if (GET_CODE (entry_parm) == PARALLEL)
+ emit_group_store (validize_mem (stack_parm), entry_parm,
+ TREE_TYPE (parm),
+ int_size_in_bytes (TREE_TYPE (parm)));
- else
- move_block_from_reg (REGNO (entry_parm),
- validize_mem (stack_parm), nregs,
- int_size_in_bytes (TREE_TYPE (parm)));
+ else
+ move_block_from_reg (REGNO (entry_parm), validize_mem (stack_parm),
+ partial);
- entry_parm = stack_parm;
- }
+ entry_parm = stack_parm;
}
-#endif
/* If we didn't decide this parm came in a register,
by default it came on the stack. */
#endif
)
{
- stack_args_size.constant += arg_size.constant;
- if (arg_size.var)
- ADD_PARM_SIZE (stack_args_size, arg_size.var);
+ stack_args_size.constant += locate.size.constant;
+ /* locate.size doesn't include the part in regs. */
+ if (partial)
+ stack_args_size.constant += current_function_pretend_args_size;
+ if (locate.size.var)
+ ADD_PARM_SIZE (stack_args_size, locate.size.var);
}
else
/* No stack slot was pushed for this parm. */
/* If parm was passed in memory, and we need to convert it on entry,
don't store it back in that same slot. */
- if (entry_parm != 0
+ if (entry_parm == stack_parm
&& nominal_mode != BLKmode && nominal_mode != passed_mode)
stack_parm = 0;
Set DECL_RTL to that place. */
- if (nominal_mode == BLKmode || GET_CODE (entry_parm) == PARALLEL)
+ if (nominal_mode == BLKmode
+#ifdef BLOCK_REG_PADDING
+ || (locate.where_pad == (BYTES_BIG_ENDIAN ? upward : downward)
+ && GET_MODE_SIZE (promoted_mode) < UNITS_PER_WORD)
+#endif
+ || GET_CODE (entry_parm) == PARALLEL)
{
/* If a BLKmode arrives in registers, copy it to a stack slot.
Handle calls that pass values in multiple non-contiguous
if (GET_CODE (entry_parm) == REG
|| GET_CODE (entry_parm) == PARALLEL)
{
- int size_stored
- = CEIL_ROUND (int_size_in_bytes (TREE_TYPE (parm)),
- UNITS_PER_WORD);
+ int size = int_size_in_bytes (TREE_TYPE (parm));
+ int size_stored = CEIL_ROUND (size, UNITS_PER_WORD);
+ rtx mem;
/* Note that we will be storing an integral number of words.
So we have to be careful to ensure that we allocate an
else if (PARM_BOUNDARY % BITS_PER_WORD != 0)
abort ();
+ mem = validize_mem (stack_parm);
+
/* Handle calls that pass values in multiple non-contiguous
locations. The Irix 6 ABI has examples of this. */
if (GET_CODE (entry_parm) == PARALLEL)
- emit_group_store (validize_mem (stack_parm), entry_parm,
- int_size_in_bytes (TREE_TYPE (parm)));
+ emit_group_store (mem, entry_parm, TREE_TYPE (parm), size);
+
+ else if (size == 0)
+ ;
+
+ /* If SIZE is that of a mode no bigger than a word, just use
+ that mode's store operation. */
+ else if (size <= UNITS_PER_WORD)
+ {
+ enum machine_mode mode
+ = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0);
+
+ if (mode != BLKmode
+#ifdef BLOCK_REG_PADDING
+ && (size == UNITS_PER_WORD
+ || (BLOCK_REG_PADDING (mode, TREE_TYPE (parm), 1)
+ != (BYTES_BIG_ENDIAN ? upward : downward)))
+#endif
+ )
+ {
+ rtx reg = gen_rtx_REG (mode, REGNO (entry_parm));
+ emit_move_insn (change_address (mem, mode, 0), reg);
+ }
+
+ /* Blocks smaller than a word on a BYTES_BIG_ENDIAN
+ machine must be aligned to the left before storing
+ to memory. Note that the previous test doesn't
+ handle all cases (e.g. SIZE == 3). */
+ else if (size != UNITS_PER_WORD
+#ifdef BLOCK_REG_PADDING
+ && (BLOCK_REG_PADDING (mode, TREE_TYPE (parm), 1)
+ == downward)
+#else
+ && BYTES_BIG_ENDIAN
+#endif
+ )
+ {
+ rtx tem, x;
+ int by = (UNITS_PER_WORD - size) * BITS_PER_UNIT;
+ rtx reg = gen_rtx_REG (word_mode, REGNO (entry_parm));
+
+ x = expand_binop (word_mode, ashl_optab, reg,
+ GEN_INT (by), 0, 1, OPTAB_WIDEN);
+ tem = change_address (mem, word_mode, 0);
+ emit_move_insn (tem, x);
+ }
+ else
+ move_block_from_reg (REGNO (entry_parm), mem,
+ size_stored / UNITS_PER_WORD);
+ }
else
- move_block_from_reg (REGNO (entry_parm),
- validize_mem (stack_parm),
- size_stored / UNITS_PER_WORD,
- int_size_in_bytes (TREE_TYPE (parm)));
+ move_block_from_reg (REGNO (entry_parm), mem,
+ size_stored / UNITS_PER_WORD);
}
SET_DECL_RTL (parm, stack_parm);
}
/* TREE_USED gets set erroneously during expand_assignment. */
save_tree_used = TREE_USED (parm);
expand_assignment (parm,
- make_tree (nominal_type, tempreg), 0, 0);
+ make_tree (nominal_type, tempreg), 0);
TREE_USED (parm) = save_tree_used;
conversion_insns = get_insns ();
did_conversion = 1;
but it's also rare and we need max_parm_reg to be
precisely correct. */
max_parm_reg = regno + 1;
- new = (rtx *) ggc_realloc (parm_reg_stack_loc,
- max_parm_reg * sizeof (rtx));
- memset ((char *) (new + old_max_parm_reg), 0,
- (max_parm_reg - old_max_parm_reg) * sizeof (rtx));
+ new = ggc_realloc (parm_reg_stack_loc,
+ max_parm_reg * sizeof (rtx));
+ memset (new + old_max_parm_reg, 0,
+ (max_parm_reg - old_max_parm_reg) * sizeof (rtx));
parm_reg_stack_loc = new;
}
&& ! did_conversion
&& stack_parm != 0
&& GET_CODE (stack_parm) == MEM
- && stack_offset.var == 0
+ && locate.offset.var == 0
&& reg_mentioned_p (virtual_incoming_args_rtx,
XEXP (stack_parm, 0)))
{
stack. So, we go back to that sequence, just so that
the fixups will happen. */
push_to_sequence (conversion_insns);
- put_var_into_stack (parm);
+ put_var_into_stack (parm, /*rescan=*/true);
conversion_insns = get_insns ();
end_sequence ();
}
{
stack_parm
= assign_stack_local (GET_MODE (entry_parm),
- GET_MODE_SIZE (GET_MODE (entry_parm)), 0);
+ GET_MODE_SIZE (GET_MODE (entry_parm)),
+ 0);
set_mem_attributes (stack_parm, parm, 1);
}
SET_DECL_RTL (parm, stack_parm);
}
+ }
- /* If this "parameter" was the place where we are receiving the
- function's incoming structure pointer, set up the result. */
- if (parm == function_result_decl)
- {
- tree result = DECL_RESULT (fndecl);
- rtx addr = DECL_RTL (parm);
- rtx x;
-
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (addr) != Pmode)
- addr = convert_memory_address (Pmode, addr);
-#endif
-
- x = gen_rtx_MEM (DECL_MODE (result), addr);
- set_mem_attributes (x, result, 1);
- SET_DECL_RTL (result, x);
- }
-
- if (GET_CODE (DECL_RTL (parm)) == REG)
- REGNO_DECL (REGNO (DECL_RTL (parm))) = parm;
- else if (GET_CODE (DECL_RTL (parm)) == CONCAT)
+ if (SPLIT_COMPLEX_ARGS && fnargs != orig_fnargs)
+ {
+ for (parm = orig_fnargs; parm; parm = TREE_CHAIN (parm))
{
- REGNO_DECL (REGNO (XEXP (DECL_RTL (parm), 0))) = parm;
- REGNO_DECL (REGNO (XEXP (DECL_RTL (parm), 1))) = parm;
+ if (TREE_CODE (TREE_TYPE (parm)) == COMPLEX_TYPE)
+ {
+ SET_DECL_RTL (parm,
+ gen_rtx_CONCAT (DECL_MODE (parm),
+ DECL_RTL (fnargs),
+ DECL_RTL (TREE_CHAIN (fnargs))));
+ DECL_INCOMING_RTL (parm)
+ = gen_rtx_CONCAT (DECL_MODE (parm),
+ DECL_INCOMING_RTL (fnargs),
+ DECL_INCOMING_RTL (TREE_CHAIN (fnargs)));
+ fnargs = TREE_CHAIN (fnargs);
+ }
+ else
+ {
+ SET_DECL_RTL (parm, DECL_RTL (fnargs));
+ DECL_INCOMING_RTL (parm) = DECL_INCOMING_RTL (fnargs);
+ }
+ fnargs = TREE_CHAIN (fnargs);
}
-
}
/* Output all parameter conversion instructions (possibly including calls)
now that all parameters have been copied out of hard registers. */
emit_insn (conversion_insns);
+ /* If we are receiving a struct value address as the first argument, set up
+ the RTL for the function result. As this might require code to convert
+ the transmitted address to Pmode, we do this here to ensure that possible
+ preliminary conversions of the address have been emitted already. */
+ if (function_result_decl)
+ {
+ tree result = DECL_RESULT (fndecl);
+ rtx addr = DECL_RTL (function_result_decl);
+ rtx x;
+
+#ifdef POINTERS_EXTEND_UNSIGNED
+ if (GET_MODE (addr) != Pmode)
+ addr = convert_memory_address (Pmode, addr);
+#endif
+
+ x = gen_rtx_MEM (DECL_MODE (result), addr);
+ set_mem_attributes (x, result, 1);
+ SET_DECL_RTL (result, x);
+ }
+
last_parm_insn = get_last_insn ();
current_function_args_size = stack_args_size.constant;
/* For stdarg.h function, save info about
regs and stack space used by the named args. */
- if (!hide_last_arg)
- current_function_args_info = args_so_far;
+ current_function_args_info = args_so_far;
/* Set the rtx used for the function return value. Put this in its
own variable so any optimizers that need this information don't have
}
}
}
+
+/* If ARGS contains entries with complex types, split the entry into two
+ entries of the component type. Return a new list of substitutions are
+ needed, else the old list. */
+
+static tree
+split_complex_args (tree args)
+{
+ tree p;
+
+ /* Before allocating memory, check for the common case of no complex. */
+ for (p = args; p; p = TREE_CHAIN (p))
+ if (TREE_CODE (TREE_TYPE (p)) == COMPLEX_TYPE)
+ goto found;
+ return args;
+
+ found:
+ args = copy_list (args);
+
+ for (p = args; p; p = TREE_CHAIN (p))
+ {
+ tree type = TREE_TYPE (p);
+ if (TREE_CODE (type) == COMPLEX_TYPE)
+ {
+ tree decl;
+ tree subtype = TREE_TYPE (type);
+
+ /* Rewrite the PARM_DECL's type with its component. */
+ TREE_TYPE (p) = subtype;
+ DECL_ARG_TYPE (p) = TREE_TYPE (DECL_ARG_TYPE (p));
+ DECL_MODE (p) = VOIDmode;
+ DECL_SIZE (p) = NULL;
+ DECL_SIZE_UNIT (p) = NULL;
+ layout_decl (p, 0);
+
+ /* Build a second synthetic decl. */
+ decl = build_decl (PARM_DECL, NULL_TREE, subtype);
+ DECL_ARG_TYPE (decl) = DECL_ARG_TYPE (p);
+ layout_decl (decl, 0);
+
+ /* Splice it in; skip the new decl. */
+ TREE_CHAIN (decl) = TREE_CHAIN (p);
+ TREE_CHAIN (p) = decl;
+ p = decl;
+ }
+ }
+
+ return args;
+}
\f
/* Indicate whether REGNO is an incoming argument to the current function
that was promoted to a wider mode. If so, return the RTX for the
#ifdef PROMOTE_FUNCTION_ARGS
rtx
-promoted_input_arg (regno, pmode, punsignedp)
- unsigned int regno;
- enum machine_mode *pmode;
- int *punsignedp;
+promoted_input_arg (unsigned int regno, enum machine_mode *pmode, int *punsignedp)
{
tree arg;
INITIAL_OFFSET_PTR points to the current offset into the stacked
arguments.
- The starting offset and size for this parm are returned in *OFFSET_PTR
- and *ARG_SIZE_PTR, respectively.
+ The starting offset and size for this parm are returned in
+ LOCATE->OFFSET and LOCATE->SIZE, respectively. When IN_REGS is
+ nonzero, the offset is that of stack slot, which is returned in
+ LOCATE->SLOT_OFFSET. LOCATE->ALIGNMENT_PAD is the amount of
+ padding required from the initial offset ptr to the stack slot.
- IN_REGS is non-zero if the argument will be passed in registers. It will
+ IN_REGS is nonzero if the argument will be passed in registers. It will
never be set if REG_PARM_STACK_SPACE is not defined.
FNDECL is the function in which the argument was defined.
initial offset is not affected by this rounding, while the size always
is and the starting offset may be. */
-/* offset_ptr will be negative for ARGS_GROW_DOWNWARD case;
- initial_offset_ptr is positive because locate_and_pad_parm's
+/* LOCATE->OFFSET will be negative for ARGS_GROW_DOWNWARD case;
+ INITIAL_OFFSET_PTR is positive because locate_and_pad_parm's
callers pass in the total size of args so far as
- initial_offset_ptr. arg_size_ptr is always positive. */
+ INITIAL_OFFSET_PTR. LOCATE->SIZE is always positive. */
void
-locate_and_pad_parm (passed_mode, type, in_regs, fndecl,
- initial_offset_ptr, offset_ptr, arg_size_ptr,
- alignment_pad)
- enum machine_mode passed_mode;
- tree type;
- int in_regs ATTRIBUTE_UNUSED;
- tree fndecl ATTRIBUTE_UNUSED;
- struct args_size *initial_offset_ptr;
- struct args_size *offset_ptr;
- struct args_size *arg_size_ptr;
- struct args_size *alignment_pad;
-
+locate_and_pad_parm (enum machine_mode passed_mode, tree type, int in_regs,
+ int partial, tree fndecl ATTRIBUTE_UNUSED,
+ struct args_size *initial_offset_ptr,
+ struct locate_and_pad_arg_data *locate)
{
- tree sizetree
- = type ? size_in_bytes (type) : size_int (GET_MODE_SIZE (passed_mode));
- enum direction where_pad = FUNCTION_ARG_PADDING (passed_mode, type);
- int boundary = FUNCTION_ARG_BOUNDARY (passed_mode, type);
+ tree sizetree;
+ enum direction where_pad;
+ int boundary;
+ int reg_parm_stack_space = 0;
+ int part_size_in_regs;
#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
+
/* If we have found a stack parm before we reach the end of the
area reserved for registers, skip that area. */
if (! in_regs)
{
- int reg_parm_stack_space = 0;
-
-#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
if (reg_parm_stack_space > 0)
{
if (initial_offset_ptr->var)
}
#endif /* REG_PARM_STACK_SPACE */
- arg_size_ptr->var = 0;
- arg_size_ptr->constant = 0;
- alignment_pad->var = 0;
- alignment_pad->constant = 0;
+ part_size_in_regs = 0;
+ if (reg_parm_stack_space == 0)
+ part_size_in_regs = ((partial * UNITS_PER_WORD)
+ / (PARM_BOUNDARY / BITS_PER_UNIT)
+ * (PARM_BOUNDARY / BITS_PER_UNIT));
+
+ sizetree
+ = type ? size_in_bytes (type) : size_int (GET_MODE_SIZE (passed_mode));
+ where_pad = FUNCTION_ARG_PADDING (passed_mode, type);
+ boundary = FUNCTION_ARG_BOUNDARY (passed_mode, type);
+ locate->where_pad = where_pad;
#ifdef ARGS_GROW_DOWNWARD
+ locate->slot_offset.constant = -initial_offset_ptr->constant;
if (initial_offset_ptr->var)
- {
- offset_ptr->constant = 0;
- offset_ptr->var = size_binop (MINUS_EXPR, ssize_int (0),
- initial_offset_ptr->var);
- }
- else
- {
- offset_ptr->constant = -initial_offset_ptr->constant;
- offset_ptr->var = 0;
- }
- if (where_pad != none
- && (!host_integerp (sizetree, 1)
- || (tree_low_cst (sizetree, 1) * BITS_PER_UNIT) % PARM_BOUNDARY))
- sizetree = round_up (sizetree, PARM_BOUNDARY / BITS_PER_UNIT);
- SUB_PARM_SIZE (*offset_ptr, sizetree);
- if (where_pad != downward)
- pad_to_arg_alignment (offset_ptr, boundary, alignment_pad);
- if (initial_offset_ptr->var)
- arg_size_ptr->var = size_binop (MINUS_EXPR,
- size_binop (MINUS_EXPR,
- ssize_int (0),
- initial_offset_ptr->var),
- offset_ptr->var);
+ locate->slot_offset.var = size_binop (MINUS_EXPR, ssize_int (0),
+ initial_offset_ptr->var);
- else
- arg_size_ptr->constant = (-initial_offset_ptr->constant
- - offset_ptr->constant);
+ {
+ tree s2 = sizetree;
+ if (where_pad != none
+ && (!host_integerp (sizetree, 1)
+ || (tree_low_cst (sizetree, 1) * BITS_PER_UNIT) % PARM_BOUNDARY))
+ s2 = round_up (s2, PARM_BOUNDARY / BITS_PER_UNIT);
+ SUB_PARM_SIZE (locate->slot_offset, s2);
+ }
+
+ locate->slot_offset.constant += part_size_in_regs;
+
+ if (!in_regs
+#ifdef REG_PARM_STACK_SPACE
+ || REG_PARM_STACK_SPACE (fndecl) > 0
+#endif
+ )
+ pad_to_arg_alignment (&locate->slot_offset, boundary,
+ &locate->alignment_pad);
+
+ locate->size.constant = (-initial_offset_ptr->constant
+ - locate->slot_offset.constant);
+ if (initial_offset_ptr->var)
+ locate->size.var = size_binop (MINUS_EXPR,
+ size_binop (MINUS_EXPR,
+ ssize_int (0),
+ initial_offset_ptr->var),
+ locate->slot_offset.var);
+
+ /* Pad_below needs the pre-rounded size to know how much to pad
+ below. */
+ locate->offset = locate->slot_offset;
+ if (where_pad == downward)
+ pad_below (&locate->offset, passed_mode, sizetree);
#else /* !ARGS_GROW_DOWNWARD */
if (!in_regs
|| REG_PARM_STACK_SPACE (fndecl) > 0
#endif
)
- pad_to_arg_alignment (initial_offset_ptr, boundary, alignment_pad);
- *offset_ptr = *initial_offset_ptr;
+ pad_to_arg_alignment (initial_offset_ptr, boundary,
+ &locate->alignment_pad);
+ locate->slot_offset = *initial_offset_ptr;
#ifdef PUSH_ROUNDING
if (passed_mode != BLKmode)
/* Pad_below needs the pre-rounded size to know how much to pad below
so this must be done before rounding up. */
- if (where_pad == downward
- /* However, BLKmode args passed in regs have their padding done elsewhere.
- The stack slot must be able to hold the entire register. */
- && !(in_regs && passed_mode == BLKmode))
- pad_below (offset_ptr, passed_mode, sizetree);
+ locate->offset = locate->slot_offset;
+ if (where_pad == downward)
+ pad_below (&locate->offset, passed_mode, sizetree);
if (where_pad != none
&& (!host_integerp (sizetree, 1)
|| (tree_low_cst (sizetree, 1) * BITS_PER_UNIT) % PARM_BOUNDARY))
sizetree = round_up (sizetree, PARM_BOUNDARY / BITS_PER_UNIT);
- ADD_PARM_SIZE (*arg_size_ptr, sizetree);
+ ADD_PARM_SIZE (locate->size, sizetree);
+
+ locate->size.constant -= part_size_in_regs;
#endif /* ARGS_GROW_DOWNWARD */
}
BOUNDARY is measured in bits, but must be a multiple of a storage unit. */
static void
-pad_to_arg_alignment (offset_ptr, boundary, alignment_pad)
- struct args_size *offset_ptr;
- int boundary;
- struct args_size *alignment_pad;
+pad_to_arg_alignment (struct args_size *offset_ptr, int boundary,
+ struct args_size *alignment_pad)
{
tree save_var = NULL_TREE;
HOST_WIDE_INT save_constant = 0;
#endif
(ARGS_SIZE_TREE (*offset_ptr),
boundary / BITS_PER_UNIT);
- offset_ptr->constant = 0; /*?*/
+ /* ARGS_SIZE_TREE includes constant term. */
+ offset_ptr->constant = 0;
if (boundary > PARM_BOUNDARY && boundary > STACK_BOUNDARY)
alignment_pad->var = size_binop (MINUS_EXPR, offset_ptr->var,
save_var);
}
}
-#ifndef ARGS_GROW_DOWNWARD
static void
-pad_below (offset_ptr, passed_mode, sizetree)
- struct args_size *offset_ptr;
- enum machine_mode passed_mode;
- tree sizetree;
+pad_below (struct args_size *offset_ptr, enum machine_mode passed_mode, tree sizetree)
{
if (passed_mode != BLKmode)
{
}
}
}
-#endif
\f
/* Walk the tree of blocks describing the binding levels within a function
and warn about uninitialized variables.
clobbers the pseudo-regs to hard regs. */
void
-uninitialized_vars_warning (block)
- tree block;
+uninitialized_vars_warning (tree block)
{
tree decl, sub;
for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
not worry that it may be a dangling pointer. */
&& DECL_INITIAL (decl) == NULL_TREE
&& regno_uninitialized (REGNO (DECL_RTL (decl))))
- warning_with_decl (decl,
- "`%s' might be used uninitialized in this function");
+ warning ("%H'%D' might be used uninitialized in this function",
+ &DECL_SOURCE_LOCATION (decl), decl);
if (extra_warnings
&& TREE_CODE (decl) == VAR_DECL
&& DECL_RTL (decl) != 0
&& GET_CODE (DECL_RTL (decl)) == REG
&& regno_clobbered_at_setjmp (REGNO (DECL_RTL (decl))))
- warning_with_decl (decl,
- "variable `%s' might be clobbered by `longjmp' or `vfork'");
+ warning ("%Hvariable '%D' might be clobbered by `longjmp' or `vfork'",
+ &DECL_SOURCE_LOCATION (decl), decl);
}
for (sub = BLOCK_SUBBLOCKS (block); sub; sub = TREE_CHAIN (sub))
uninitialized_vars_warning (sub);
but for arguments instead of local variables. */
void
-setjmp_args_warning ()
+setjmp_args_warning (void)
{
tree decl;
for (decl = DECL_ARGUMENTS (current_function_decl);
if (DECL_RTL (decl) != 0
&& GET_CODE (DECL_RTL (decl)) == REG
&& regno_clobbered_at_setjmp (REGNO (DECL_RTL (decl))))
- warning_with_decl (decl,
- "argument `%s' might be clobbered by `longjmp' or `vfork'");
+ warning ("%Hargument '%D' might be clobbered by `longjmp' or `vfork'",
+ &DECL_SOURCE_LOCATION (decl), decl);
}
/* If this function call setjmp, put all vars into the stack
unless they were declared `register'. */
void
-setjmp_protect (block)
- tree block;
+setjmp_protect (tree block)
{
tree decl, sub;
for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
||
#endif
! DECL_REGISTER (decl)))
- put_var_into_stack (decl);
+ put_var_into_stack (decl, /*rescan=*/true);
for (sub = BLOCK_SUBBLOCKS (block); sub; sub = TREE_CHAIN (sub))
setjmp_protect (sub);
}
/* Like the previous function, but for args instead of local variables. */
void
-setjmp_protect_args ()
+setjmp_protect_args (void)
{
tree decl;
for (decl = DECL_ARGUMENTS (current_function_decl);
||
#endif
! DECL_REGISTER (decl)))
- put_var_into_stack (decl);
+ put_var_into_stack (decl, /*rescan=*/true);
}
\f
/* Return the context-pointer register corresponding to DECL,
or 0 if it does not need one. */
rtx
-lookup_static_chain (decl)
- tree decl;
+lookup_static_chain (tree decl)
{
tree context = decl_function_context (decl);
tree link;
into an address valid in this function (using a static chain). */
rtx
-fix_lexical_addr (addr, var)
- rtx addr;
- tree var;
+fix_lexical_addr (rtx addr, tree var)
{
rtx basereg;
HOST_WIDE_INT displacement;
and emit rtl to initialize its contents (at entry to this function). */
rtx
-trampoline_address (function)
- tree function;
+trampoline_address (tree function)
{
tree link;
tree rtlexp;
&& fn_context != inline_function_decl)
fp = find_function_data (fn_context);
- /* Allocate run-time space for this trampoline
- (usually in the defining function's stack frame). */
-#ifdef ALLOCATE_TRAMPOLINE
- tramp = ALLOCATE_TRAMPOLINE (fp);
-#else
+ /* Allocate run-time space for this trampoline. */
/* If rounding needed, allocate extra space
to ensure we have TRAMPOLINE_SIZE bytes left after rounding up. */
-#ifdef TRAMPOLINE_ALIGNMENT
#define TRAMPOLINE_REAL_SIZE \
(TRAMPOLINE_SIZE + (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT) - 1)
-#else
-#define TRAMPOLINE_REAL_SIZE (TRAMPOLINE_SIZE)
-#endif
tramp = assign_stack_local_1 (BLKmode, TRAMPOLINE_REAL_SIZE, 0,
fp ? fp : cfun);
-#endif
-
/* Record the trampoline for reuse and note it for later initialization
by expand_function_end. */
if (fp != 0)
round it to multiple of TRAMPOLINE_ALIGNMENT. */
static rtx
-round_trampoline_addr (tramp)
- rtx tramp;
+round_trampoline_addr (rtx tramp)
{
-#ifdef TRAMPOLINE_ALIGNMENT
/* Round address up to desired boundary. */
rtx temp = gen_reg_rtx (Pmode);
rtx addend = GEN_INT (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT - 1);
temp, 0, OPTAB_LIB_WIDEN);
tramp = expand_simple_binop (Pmode, AND, temp, mask,
temp, 0, OPTAB_LIB_WIDEN);
-#endif
+
return tramp;
}
function call . */
static rtx
-adjust_trampoline_addr (tramp)
- rtx tramp;
+adjust_trampoline_addr (rtx tramp)
{
tramp = round_trampoline_addr (tramp);
#ifdef TRAMPOLINE_ADJUST_ADDRESS
and INSNS, the insn chain of the function. */
void
-identify_blocks ()
+identify_blocks (void)
{
int n_blocks;
tree *block_vector, *last_block_vector;
/* Fill the BLOCK_VECTOR with all of the BLOCKs in this function, in
depth-first order. */
block_vector = get_block_vector (block, &n_blocks);
- block_stack = (tree *) xmalloc (n_blocks * sizeof (tree));
+ block_stack = xmalloc (n_blocks * sizeof (tree));
last_block_vector = identify_blocks_1 (get_insns (),
block_vector + 1,
BLOCK_VECTOR is incremented for each block seen. */
static tree *
-identify_blocks_1 (insns, block_vector, end_block_vector, orig_block_stack)
- rtx insns;
- tree *block_vector;
- tree *end_block_vector;
- tree *orig_block_stack;
+identify_blocks_1 (rtx insns, tree *block_vector, tree *end_block_vector,
+ tree *orig_block_stack)
{
rtx insn;
tree *block_stack = orig_block_stack;
on what optimization has been performed. */
void
-reorder_blocks ()
+reorder_blocks (void)
{
tree block = DECL_INITIAL (current_function_decl);
varray_type block_stack;
/* Helper function for reorder_blocks. Reset TREE_ASM_WRITTEN. */
static void
-reorder_blocks_0 (block)
- tree block;
+reorder_blocks_0 (tree block)
{
while (block)
{
}
static void
-reorder_blocks_1 (insns, current_block, p_block_stack)
- rtx insns;
- tree current_block;
- varray_type *p_block_stack;
+reorder_blocks_1 (rtx insns, tree current_block, varray_type *p_block_stack)
{
rtx insn;
BLOCK_SUBBLOCKS (block) = 0;
TREE_ASM_WRITTEN (block) = 1;
- BLOCK_SUPERCONTEXT (block) = current_block;
- BLOCK_CHAIN (block) = BLOCK_SUBBLOCKS (current_block);
- BLOCK_SUBBLOCKS (current_block) = block;
- current_block = block;
+ /* When there's only one block for the entire function,
+ current_block == block and we mustn't do this, it
+ will cause infinite recursion. */
+ if (block != current_block)
+ {
+ BLOCK_SUPERCONTEXT (block) = current_block;
+ BLOCK_CHAIN (block) = BLOCK_SUBBLOCKS (current_block);
+ BLOCK_SUBBLOCKS (current_block) = block;
+ current_block = block;
+ }
VARRAY_PUSH_TREE (*p_block_stack, block);
}
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_END)
the new origin block. */
static void
-reorder_fix_fragments (block)
- tree block;
+reorder_fix_fragments (tree block)
{
while (block)
{
and return the new head of the chain (old last element). */
static tree
-blocks_nreverse (t)
- tree t;
+blocks_nreverse (tree t)
{
tree prev = 0, decl, next;
for (decl = t; decl; decl = next)
blocks. */
static int
-all_blocks (block, vector)
- tree block;
- tree *vector;
+all_blocks (tree block, tree *vector)
{
int n_blocks = 0;
to call `free' on the pointer returned. */
static tree *
-get_block_vector (block, n_blocks_p)
- tree block;
- int *n_blocks_p;
+get_block_vector (tree block, int *n_blocks_p)
{
tree *block_vector;
*n_blocks_p = all_blocks (block, NULL);
- block_vector = (tree *) xmalloc (*n_blocks_p * sizeof (tree));
+ block_vector = xmalloc (*n_blocks_p * sizeof (tree));
all_blocks (block, block_vector);
return block_vector;
}
-static int next_block_index = 2;
+static GTY(()) int next_block_index = 2;
/* Set BLOCK_NUMBER for all the blocks in FN. */
void
-number_blocks (fn)
- tree fn;
+number_blocks (tree fn)
{
int i;
int n_blocks;
/* If VAR is present in a subblock of BLOCK, return the subblock. */
tree
-debug_find_var_in_block_tree (var, block)
- tree var;
- tree block;
+debug_find_var_in_block_tree (tree var, tree block)
{
tree t;
/* Allocate a function structure and reset its contents to the defaults. */
static void
-prepare_function_start ()
+prepare_function_start (void)
{
- cfun = (struct function *) ggc_alloc_cleared (sizeof (struct function));
+ cfun = ggc_alloc_cleared (sizeof (struct function));
init_stmt_for_function ();
init_eh_for_function ();
current_function_calls_longjmp = 0;
current_function_calls_alloca = 0;
+ current_function_calls_eh_return = 0;
+ current_function_calls_constant_p = 0;
current_function_contains_functions = 0;
current_function_is_leaf = 0;
current_function_nothrow = 0;
/* Indicate we have no need of a frame pointer yet. */
frame_pointer_needed = 0;
- /* By default assume not varargs or stdarg. */
- current_function_varargs = 0;
+ /* By default assume not stdarg. */
current_function_stdarg = 0;
/* We haven't made any trampolines for this function yet. */
current_function_funcdef_no = funcdef_no++;
- cfun->arc_profile = profile_arc_flag || flag_test_coverage;
-
- cfun->arc_profile = profile_arc_flag || flag_test_coverage;
-
cfun->function_frequency = FUNCTION_FREQUENCY_NORMAL;
+ cfun->max_jumptable_ents = 0;
+
(*lang_hooks.function.init) (cfun);
if (init_machine_status)
cfun->machine = (*init_machine_status) ();
like generate sequences. This is used to provide a context during global
initialization of some passes. */
void
-init_dummy_function_start ()
+init_dummy_function_start (void)
{
prepare_function_start ();
}
of the function. */
void
-init_function_start (subr, filename, line)
- tree subr;
- const char *filename;
- int line;
+init_function_start (tree subr)
{
prepare_function_start ();
/* Within function body, compute a type's size as soon it is laid out. */
immediate_size_expand++;
- /* Prevent ever trying to delete the first instruction of a function.
- Also tell final how to output a linenum before the function prologue.
- Note linenums could be missing, e.g. when compiling a Java .class file. */
- if (line > 0)
- emit_line_note (filename, line);
+ /* Prevent ever trying to delete the first instruction of a
+ function. Also tell final how to output a linenum before the
+ function prologue. Note linenums could be missing, e.g. when
+ compiling a Java .class file. */
+ if (DECL_SOURCE_LINE (subr))
+ emit_line_note (DECL_SOURCE_LOCATION (subr));
/* Make sure first insn is a note even if we don't want linenums.
This makes sure the first insn will never be deleted.
Also, final expects a note to appear there. */
- emit_note (NULL, NOTE_INSN_DELETED);
+ emit_note (NOTE_INSN_DELETED);
/* Set flags used by final.c. */
if (aggregate_value_p (DECL_RESULT (subr)))
/* Make sure all values used by the optimization passes have sane
defaults. */
void
-init_function_for_compilation ()
+init_function_for_compilation (void)
{
reg_renumber = 0;
VARRAY_GROW (sibcall_epilogue, 0);
}
-/* Indicate that the current function uses extra args
- not explicitly mentioned in the argument list in any fashion. */
-
-void
-mark_varargs ()
-{
- current_function_varargs = 1;
-}
-
/* Expand a call to __main at the beginning of a possible main function. */
#if defined(INIT_SECTION_ASM_OP) && !defined(INVOKE__main)
#endif
void
-expand_main_function ()
+expand_main_function (void)
{
#ifdef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
if (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN)
#endif
#ifndef HAS_INIT_SECTION
- emit_library_call (gen_rtx_SYMBOL_REF (Pmode, NAME__MAIN), LCT_NORMAL,
- VOIDmode, 0);
+ emit_library_call (init_one_libfunc (NAME__MAIN), LCT_NORMAL, VOIDmode, 0);
#endif
}
\f
-extern struct obstack permanent_obstack;
-
/* The PENDING_SIZES represent the sizes of variable-sized types.
Create RTL for the various sizes now (using temporary variables),
so that we can refer to the sizes from the RTL we are generating
TREE_VALUE of each node is a SAVE_EXPR. */
void
-expand_pending_sizes (pending_sizes)
- tree pending_sizes;
+expand_pending_sizes (tree pending_sizes)
{
tree tem;
the function's parameters, which must be run at any return statement. */
void
-expand_function_start (subr, parms_have_cleanups)
- tree subr;
- int parms_have_cleanups;
+expand_function_start (tree subr, int parms_have_cleanups)
{
tree tem;
rtx last_ptr = NULL_RTX;
subr, 1);
/* Structures that are returned in registers are not aggregate_value_p,
- so we may see a PARALLEL. Don't play pseudo games with this. */
- if (! REG_P (hard_reg))
- SET_DECL_RTL (DECL_RESULT (subr), hard_reg);
+ so we may see a PARALLEL or a REG. */
+ if (REG_P (hard_reg))
+ SET_DECL_RTL (DECL_RESULT (subr), gen_reg_rtx (GET_MODE (hard_reg)));
+ else if (GET_CODE (hard_reg) == PARALLEL)
+ SET_DECL_RTL (DECL_RESULT (subr), gen_group_rtx (hard_reg));
else
- {
- /* Create the pseudo. */
- SET_DECL_RTL (DECL_RESULT (subr), gen_reg_rtx (GET_MODE (hard_reg)));
+ abort ();
- /* Needed because we may need to move this to memory
- in case it's a named return value whose address is taken. */
- DECL_REGISTER (DECL_RESULT (subr)) = 1;
- }
+ /* Set DECL_REGISTER flag so that expand_function_end will copy the
+ result to the real return register(s). */
+ DECL_REGISTER (DECL_RESULT (subr)) = 1;
}
/* Initialize rtx for parameters and local variables.
The move is supposed to make sdb output more accurate. */
/* Indicate the beginning of the function body,
as opposed to parm setup. */
- emit_note (NULL, NOTE_INSN_FUNCTION_BEG);
+ emit_note (NOTE_INSN_FUNCTION_BEG);
if (GET_CODE (get_last_insn ()) != NOTE)
- emit_note (NULL, NOTE_INSN_DELETED);
+ emit_note (NOTE_INSN_DELETED);
parm_birth_insn = get_last_insn ();
context_display = 0;
/* After the display initializations is where the tail-recursion label
should go, if we end up needing one. Ensure we have a NOTE here
since some things (like trampolines) get placed before this. */
- tail_recursion_reentry = emit_note (NULL, NOTE_INSN_DELETED);
+ tail_recursion_reentry = emit_note (NOTE_INSN_DELETED);
/* Evaluate now the sizes of any types declared among the arguments. */
expand_pending_sizes (nreverse (get_pending_sizes ()));
\f
/* Undo the effects of init_dummy_function_start. */
void
-expand_dummy_function_end ()
+expand_dummy_function_end (void)
{
/* End any sequences that failed to be closed due to syntax errors. */
while (in_sequence_p ())
the current function. */
void
-diddle_return_value (doit, arg)
- void (*doit) PARAMS ((rtx, void *));
- void *arg;
+diddle_return_value (void (*doit) (rtx, void *), void *arg)
{
rtx outgoing = current_function_return_rtx;
}
static void
-do_clobber_return_reg (reg, arg)
- rtx reg;
- void *arg ATTRIBUTE_UNUSED;
+do_clobber_return_reg (rtx reg, void *arg ATTRIBUTE_UNUSED)
{
emit_insn (gen_rtx_CLOBBER (VOIDmode, reg));
}
void
-clobber_return_register ()
+clobber_return_register (void)
{
diddle_return_value (do_clobber_return_reg, NULL);
}
static void
-do_use_return_reg (reg, arg)
- rtx reg;
- void *arg ATTRIBUTE_UNUSED;
+do_use_return_reg (rtx reg, void *arg ATTRIBUTE_UNUSED)
{
emit_insn (gen_rtx_USE (VOIDmode, reg));
}
void
-use_return_register ()
+use_return_register (void)
{
diddle_return_value (do_use_return_reg, NULL);
}
static GTY(()) rtx initial_trampoline;
-/* Generate RTL for the end of the current function.
- FILENAME and LINE are the current position in the source file.
-
- It is up to language-specific callers to do cleanups for parameters--
- or else, supply 1 for END_BINDINGS and we will call expand_end_bindings. */
+/* Generate RTL for the end of the current function. */
void
-expand_function_end (filename, line, end_bindings)
- const char *filename;
- int line;
- int end_bindings;
+expand_function_end (void)
{
tree link;
rtx clobber_after;
#ifdef TRAMPOLINE_TEMPLATE
blktramp = replace_equiv_address (initial_trampoline, tramp);
emit_block_move (blktramp, initial_trampoline,
- GEN_INT (TRAMPOLINE_SIZE));
+ GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL);
#endif
+ trampolines_created = 1;
INITIALIZE_TRAMPOLINE (tramp, XEXP (DECL_RTL (function), 0), context);
seq = get_insns ();
end_sequence ();
}
}
- /* Warn about unused parms if extra warnings were specified. */
- /* Either ``-W -Wunused'' or ``-Wunused-parameter'' enables this
- warning. WARN_UNUSED_PARAMETER is negative when set by
- -Wunused. */
- if (warn_unused_parameter > 0
- || (warn_unused_parameter < 0 && extra_warnings))
+ /* Possibly warn about unused parameters. */
+ if (warn_unused_parameter)
{
tree decl;
decl; decl = TREE_CHAIN (decl))
if (! TREE_USED (decl) && TREE_CODE (decl) == PARM_DECL
&& DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
- warning_with_decl (decl, "unused parameter `%s'");
+ warning ("%Hunused parameter '%D'",
+ &DECL_SOURCE_LOCATION (decl), decl);
}
/* Delete handlers for nonlocal gotos if nothing uses them. */
/* Mark the end of the function body.
If control reaches this insn, the function can drop through
without returning a value. */
- emit_note (NULL, NOTE_INSN_FUNCTION_END);
+ emit_note (NOTE_INSN_FUNCTION_END);
/* Must mark the last line number note in the function, so that the test
coverage code can avoid counting the last line twice. This just tells
already exists a copy of this note somewhere above. This line number
note is still needed for debugging though, so we can't delete it. */
if (flag_test_coverage)
- emit_note (NULL, NOTE_INSN_REPEATED_LINE_NUMBER);
+ emit_note (NOTE_INSN_REPEATED_LINE_NUMBER);
/* Output a linenumber for the end of the function.
SDB depends on this. */
- emit_line_note_force (filename, line);
+ force_next_line_note ();
+ emit_line_note (input_location);
/* Before the return label (if any), clobber the return
registers so that they are not propagated live to the rest of
if (return_label)
emit_label (return_label);
- /* C++ uses this. */
- if (end_bindings)
- expand_end_bindings (0, 0, 0);
-
if (current_function_instrument_entry_exit)
{
rtx fun = DECL_RTL (current_function_decl);
convert_move (real_decl_rtl, decl_rtl, unsignedp);
}
else if (GET_CODE (real_decl_rtl) == PARALLEL)
- emit_group_load (real_decl_rtl, decl_rtl,
- int_size_in_bytes (TREE_TYPE (decl_result)));
+ {
+ /* If expand_function_start has created a PARALLEL for decl_rtl,
+ move the result to the real return registers. Otherwise, do
+ a group load from decl_rtl for a named return. */
+ if (GET_CODE (decl_rtl) == PARALLEL)
+ emit_group_move (real_decl_rtl, decl_rtl);
+ else
+ emit_group_load (real_decl_rtl, decl_rtl,
+ TREE_TYPE (decl_result),
+ int_size_in_bytes (TREE_TYPE (decl_result)));
+ }
else
emit_move_insn (real_decl_rtl, decl_rtl);
}
}
rtx
-get_arg_pointer_save_area (f)
- struct function *f;
+get_arg_pointer_save_area (struct function *f)
{
rtx ret = f->x_arg_pointer_save_area;
(a list of one or more insns). */
static void
-record_insns (insns, vecp)
- rtx insns;
- varray_type *vecp;
+record_insns (rtx insns, varray_type *vecp)
{
int i, len;
rtx tmp;
}
}
+/* Set the specified locator to the insn chain. */
+static void
+set_insn_locators (rtx insn, int loc)
+{
+ while (insn != NULL_RTX)
+ {
+ if (INSN_P (insn))
+ INSN_LOCATOR (insn) = loc;
+ insn = NEXT_INSN (insn);
+ }
+}
+
/* Determine how many INSN_UIDs in VEC are part of INSN. Because we can
be running after reorg, SEQUENCE rtl is possible. */
static int
-contains (insn, vec)
- rtx insn;
- varray_type vec;
+contains (rtx insn, varray_type vec)
{
int i, j;
}
int
-prologue_epilogue_contains (insn)
- rtx insn;
+prologue_epilogue_contains (rtx insn)
{
if (contains (insn, prologue))
return 1;
}
int
-sibcall_epilogue_contains (insn)
- rtx insn;
+sibcall_epilogue_contains (rtx insn)
{
if (sibcall_epilogue)
return contains (insn, sibcall_epilogue);
block_for_insn appropriately. */
static void
-emit_return_into_block (bb, line_note)
- basic_block bb;
- rtx line_note;
+emit_return_into_block (basic_block bb, rtx line_note)
{
- rtx p, end;
-
- p = NEXT_INSN (bb->end);
- end = emit_jump_insn_after (gen_return (), bb->end);
+ emit_jump_insn_after (gen_return (), bb->end);
if (line_note)
- emit_line_note_after (NOTE_SOURCE_FILE (line_note),
- NOTE_LINE_NUMBER (line_note), PREV_INSN (bb->end));
+ emit_note_copy_after (line_note, PREV_INSN (bb->end));
}
#endif /* HAVE_return */
its value. */
};
-static void handle_epilogue_set PARAMS ((rtx, struct epi_info *));
-static void emit_equiv_load PARAMS ((struct epi_info *));
+static void handle_epilogue_set (rtx, struct epi_info *);
+static void emit_equiv_load (struct epi_info *);
/* Modify INSN, a list of one or more insns that is part of the epilogue, to
no modifications to the stack pointer. Return the new list of insns. */
static rtx
-keep_stack_depressed (insns)
- rtx insns;
+keep_stack_depressed (rtx insns)
{
int j;
struct epi_info info;
more insns. */
static void
-handle_epilogue_set (set, p)
- rtx set;
- struct epi_info *p;
+handle_epilogue_set (rtx set, struct epi_info *p)
{
/* First handle the case where we are setting SP. Record what it is being
set from. If unknown, abort. */
/* Emit an insn to do the load shown in p->equiv_reg_src, if needed. */
static void
-emit_equiv_load (p)
- struct epi_info *p;
+emit_equiv_load (struct epi_info *p)
{
if (p->equiv_reg_src != 0)
emit_move_insn (p->sp_equiv_reg, p->equiv_reg_src);
the epilogue begins. Update the basic block information when possible. */
void
-thread_prologue_and_epilogue_insns (f)
- rtx f ATTRIBUTE_UNUSED;
+thread_prologue_and_epilogue_insns (rtx f ATTRIBUTE_UNUSED)
{
int inserted = 0;
edge e;
/* Retain a map of the prologue insns. */
record_insns (seq, &prologue);
- prologue_end = emit_note (NULL, NOTE_INSN_PROLOGUE_END);
+ prologue_end = emit_note (NOTE_INSN_PROLOGUE_END);
seq = get_insns ();
end_sequence ();
+ set_insn_locators (seq, prologue_locator);
/* Can't deal with multiple successors of the entry block
at the moment. Function should always have at least one
that with a conditional return instruction. */
else if (condjump_p (jump))
{
- rtx ret, *loc;
-
- ret = SET_SRC (PATTERN (jump));
- if (GET_CODE (XEXP (ret, 1)) == LABEL_REF)
- loc = &XEXP (ret, 1);
- else
- loc = &XEXP (ret, 2);
- ret = gen_rtx_RETURN (VOIDmode);
-
- if (! validate_change (jump, loc, ret, 0))
+ if (! redirect_jump (jump, 0, 0))
continue;
- if (JUMP_LABEL (jump))
- LABEL_NUSES (JUMP_LABEL (jump))--;
/* If this block has only one successor, it both jumps
and falls through to the fallthru block, so we can't
goto epilogue_done;
start_sequence ();
- epilogue_end = emit_note (NULL, NOTE_INSN_EPILOGUE_BEG);
+ epilogue_end = emit_note (NOTE_INSN_EPILOGUE_BEG);
seq = gen_epilogue ();
/* Retain a map of the epilogue insns. */
record_insns (seq, &epilogue);
+ set_insn_locators (seq, epilogue_locator);
seq = get_insns ();
end_sequence ();
avoid getting rid of sibcall epilogue insns. Do this before we
actually emit the sequence. */
record_insns (seq, &sibcall_epilogue);
+ set_insn_locators (seq, epilogue_locator);
i = PREV_INSN (insn);
newinsn = emit_insn_before (seq, insn);
note before the end of the first basic block, if there isn't
one already there.
- ??? This behaviour is completely broken when dealing with
+ ??? This behavior is completely broken when dealing with
multiple entry functions. We simply place the note always
into first basic block and let alternate entry points
to be missed.
insn = PREV_INSN (insn))
if (GET_CODE (insn) == NOTE && NOTE_LINE_NUMBER (insn) > 0)
{
- emit_line_note_after (NOTE_SOURCE_FILE (insn),
- NOTE_LINE_NUMBER (insn),
- prologue_end);
+ emit_note_copy_after (insn, prologue_end);
break;
}
}
scheduling and delayed branch scheduling. */
void
-reposition_prologue_and_epilogue_notes (f)
- rtx f ATTRIBUTE_UNUSED;
+reposition_prologue_and_epilogue_notes (rtx f ATTRIBUTE_UNUSED)
{
#if defined (HAVE_prologue) || defined (HAVE_epilogue)
rtx insn, last, note;
if (last)
{
- rtx next;
-
/* Find the prologue-end note if we haven't already, and
move it to just after the last prologue insn. */
if (note == 0)
break;
}
- next = NEXT_INSN (note);
-
/* Avoid placing note between CODE_LABEL and BASIC_BLOCK note. */
if (GET_CODE (last) == CODE_LABEL)
last = NEXT_INSN (last);
/* Called once, at initialization, to initialize function.c. */
void
-init_function_once ()
+init_function_once (void)
{
VARRAY_INT_INIT (prologue, 0, "prologue");
VARRAY_INT_INIT (epilogue, 0, "epilogue");
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