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Consolidate red-zone logic into ix86_using_red_zone. 

From-SVN: r162885
This commit is contained in:
Richard Henderson 2010-08-04 16:58:02 -07:00 committed by Richard Henderson
parent cdcb5f261e
commit 2550204162
2 changed files with 18 additions and 7 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2010-08-04 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (ix86_using_red_zone): New.
(ix86_compute_frame_layout, ix86_add_cfa_restore_note,
ix86_expand_prologue, ix86_force_to_memory): Use it.
* config/i386/i386.c (ix86_expand_prologue): Simplify logic
saving the int registers.

21
gcc/config/i386/i386.c
View File

@ -2201,6 +2201,14 @@ static const char *const cpu_names[TARGET_CPU_DEFAULT_max] =
"bdver1"
};
/* Return true if a red-zone is in use. */
static inline bool
ix86_using_red_zone (void)
{
return TARGET_RED_ZONE && !TARGET_64BIT_MS_ABI;
}
/* Implement TARGET_HANDLE_OPTION. */
static bool
@ -8459,7 +8467,7 @@ ix86_compute_frame_layout (struct ix86_frame *frame)
|| (TARGET_64BIT && frame->to_allocate >= (HOST_WIDE_INT) 0x80000000))
frame->save_regs_using_mov = false;
if (!TARGET_64BIT_MS_ABI && TARGET_RED_ZONE
if (ix86_using_red_zone ()
&& current_function_sp_is_unchanging
&& current_function_is_leaf
&& !ix86_current_function_calls_tls_descriptor)
@ -8542,8 +8550,7 @@ static GTY(()) rtx queued_cfa_restores;
static void
ix86_add_cfa_restore_note (rtx insn, rtx reg, HOST_WIDE_INT red_offset)
{
if (TARGET_RED_ZONE
&& !TARGET_64BIT_MS_ABI
if (ix86_using_red_zone ()
&& red_offset + RED_ZONE_SIZE >= 0
&& crtl->args.pops_args < 65536)
return;
@ -9387,7 +9394,7 @@ ix86_expand_prologue (void)
at least on x86_64 the stack probe can turn into a call that clobbers
a red zone location */
if (!int_registers_saved
&& (TARGET_RED_ZONE && !TARGET_64BIT_MS_ABI)
&& ix86_using_red_zone ()
&& (! TARGET_STACK_PROBE || allocate < CHECK_STACK_LIMIT))
{
ix86_emit_save_regs_using_mov ((frame_pointer_needed
@ -25774,7 +25781,7 @@ ix86_force_to_memory (enum machine_mode mode, rtx operand)
rtx result;
gcc_assert (reload_completed);
if (!TARGET_64BIT_MS_ABI && TARGET_RED_ZONE)
if (ix86_using_red_zone ())
{
result = gen_rtx_MEM (mode,
gen_rtx_PLUS (Pmode,
@ -25782,7 +25789,7 @@ ix86_force_to_memory (enum machine_mode mode, rtx operand)
GEN_INT (-RED_ZONE_SIZE)));
emit_move_insn (result, operand);
}
else if ((TARGET_64BIT_MS_ABI || !TARGET_RED_ZONE) && TARGET_64BIT)
else if (TARGET_64BIT)
{
switch (mode)
{
@ -25849,7 +25856,7 @@ ix86_force_to_memory (enum machine_mode mode, rtx operand)
void
ix86_free_from_memory (enum machine_mode mode)
{
if (!TARGET_RED_ZONE || TARGET_64BIT_MS_ABI)
if (!ix86_using_red_zone ())
{
int size;