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i386.c (ix86_expand_prologue): Emit frame info for the special register pushes before frame probing and allocation. 

* config/i386/i386.c (ix86_expand_prologue): Emit frame info for the
	special register pushes before frame probing and allocation.

From-SVN: r193045
This commit is contained in:
Eric Botcazou 2012-10-31 20:12:40 +00:00 committed by Eric Botcazou
parent 71773a8a55
commit 93631c2a75
2 changed files with 25 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-10-31 Eric Botcazou <ebotcazou@adacore.com>
* config/i386/i386.c (ix86_expand_prologue): Emit frame info for the
special register pushes before frame probing and allocation.
2012-10-31 Ralf Corsépius <ralf.corsepius@rtems.org>,
Joel Sherrill <joel.sherrill@oarcorp.com>

28
gcc/config/i386/i386.c
View File

@ -10339,7 +10339,7 @@ ix86_expand_prologue (void)
rtx eax = gen_rtx_REG (Pmode, AX_REG);
rtx r10 = NULL;
rtx (*adjust_stack_insn)(rtx, rtx, rtx);
const bool sp_is_cfa_reg = (m->fs.cfa_reg == stack_pointer_rtx);
bool eax_live = false;
bool r10_live = false;
@ -10348,16 +10348,31 @@ ix86_expand_prologue (void)
if (!TARGET_64BIT_MS_ABI)
eax_live = ix86_eax_live_at_start_p ();
/* Note that SEH directives need to continue tracking the stack
pointer even after the frame pointer has been set up. */
if (eax_live)
{
emit_insn (gen_push (eax));
insn = emit_insn (gen_push (eax));
allocate -= UNITS_PER_WORD;
if (sp_is_cfa_reg || TARGET_SEH)
{
if (sp_is_cfa_reg)
m->fs.cfa_offset += UNITS_PER_WORD;
RTX_FRAME_RELATED_P (insn) = 1;
}
}
if (r10_live)
{
r10 = gen_rtx_REG (Pmode, R10_REG);
emit_insn (gen_push (r10));
insn = emit_insn (gen_push (r10));
allocate -= UNITS_PER_WORD;
if (sp_is_cfa_reg || TARGET_SEH)
{
if (sp_is_cfa_reg)
m->fs.cfa_offset += UNITS_PER_WORD;
RTX_FRAME_RELATED_P (insn) = 1;
}
}
emit_move_insn (eax, GEN_INT (allocate));
@ -10371,13 +10386,10 @@ ix86_expand_prologue (void)
insn = emit_insn (adjust_stack_insn (stack_pointer_rtx,
stack_pointer_rtx, eax));
/* Note that SEH directives need to continue tracking the stack
pointer even after the frame pointer has been set up. */
if (m->fs.cfa_reg == stack_pointer_rtx || TARGET_SEH)
if (sp_is_cfa_reg || TARGET_SEH)
{
if (m->fs.cfa_reg == stack_pointer_rtx)
if (sp_is_cfa_reg)
m->fs.cfa_offset += allocate;
RTX_FRAME_RELATED_P (insn) = 1;
add_reg_note (insn, REG_FRAME_RELATED_EXPR,
gen_rtx_SET (VOIDmode, stack_pointer_rtx,