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i386.c (ix86_expand_split_stack_prologue): Add REG_ARGS_SIZE note to 32-bit push insns and call insn.

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* config/i386/i386.c (ix86_expand_split_stack_prologue): Add
	REG_ARGS_SIZE note to 32-bit push insns and call insn.

From-SVN: r245076
This commit is contained in:
Ian Lance Taylor 2017-01-31 23:49:26 +00:00 • committed by Ian Lance Taylor
parent 19bdccb4be
commit 014baadeaf
2 changed files with 14 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2017-01-31 Ian Lance Taylor <iant@golang.org>
* config/i386/i386.c (ix86_expand_split_stack_prologue): Add
REG_ARGS_SIZE note to 32-bit push insns and call insn.
2017-01-31 David Malcolm <dmalcolm@redhat.com>
PR preprocessor/79210

12
gcc/config/i386/i386.c
View file

@ -14944,6 +14944,7 @@ ix86_expand_split_stack_prologue (void)
allocate_rtx = GEN_INT (allocate);
args_size = crtl->args.size >= 0 ? crtl->args.size : 0;
call_fusage = NULL_RTX;
rtx pop = NULL_RTX;
if (TARGET_64BIT)
{
rtx reg10, reg11;
@ -15021,13 +15022,18 @@ ix86_expand_split_stack_prologue (void)
}
else
{
emit_insn (gen_push (GEN_INT (args_size)));
emit_insn (gen_push (allocate_rtx));
rtx_insn *insn = emit_insn (gen_push (GEN_INT (args_size)));
add_reg_note (insn, REG_ARGS_SIZE, GEN_INT (UNITS_PER_WORD));
insn = emit_insn (gen_push (allocate_rtx));
add_reg_note (insn, REG_ARGS_SIZE, GEN_INT (2 * UNITS_PER_WORD));
pop = GEN_INT (2 * UNITS_PER_WORD);
}
call_insn = ix86_expand_call (NULL_RTX, gen_rtx_MEM (QImode, fn),
GEN_INT (UNITS_PER_WORD), constm1_rtx,
NULL_RTX, false);
pop, false);
add_function_usage_to (call_insn, call_fusage);
if (!TARGET_64BIT)
add_reg_note (call_insn, REG_ARGS_SIZE, GEN_INT (0));
/* In order to make call/return prediction work right, we now need
to execute a return instruction. See