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function.c (stack_protect_epilogue): Use if rather than switch for check targetm.have_stack_protect_test. 

2015-07-08  Kito Cheng  <kito.cheng@gmail.com>

	* function.c (stack_protect_epilogue): Use if rather than switch for
	check targetm.have_stack_protect_test.

From-SVN: r225599
This commit is contained in:
Kito Cheng 2015-07-09 03:51:21 +00:00 committed by Jeff Law
parent ca506be640
commit ebd765d41a
2 changed files with 11 additions and 14 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-07-08 Kito Cheng <kito.cheng@gmail.com>
* function.c (stack_protect_epilogue): Use if rather than switch for
check targetm.have_stack_protect_test.
2015-07-08 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* defaults.h: Provide default for WORD_REGISTER_OPERATIONS.

20
gcc/function.c
View File

@ -4874,26 +4874,18 @@ stack_protect_epilogue (void)
tree guard_decl = targetm.stack_protect_guard ();
rtx_code_label *label = gen_label_rtx ();
rtx x, y, tmp;
rtx_insn *seq;
x = expand_normal (crtl->stack_protect_guard);
y = expand_normal (guard_decl);
/* Allow the target to compare Y with X without leaking either into
a register. */
switch (targetm.have_stack_protect_test ())
{
case 1:
if (rtx_insn *seq = targetm.gen_stack_protect_test (x, y, label))
{
emit_insn (seq);
break;
}
/* FALLTHRU */
default:
emit_cmp_and_jump_insns (x, y, EQ, NULL_RTX, ptr_mode, 1, label);
break;
}
if (targetm.have_stack_protect_test ()
&& ((seq = targetm.gen_stack_protect_test (x, y, label)) != NULL_RTX))
emit_insn (seq);
else
emit_cmp_and_jump_insns (x, y, EQ, NULL_RTX, ptr_mode, 1, label);
/* The noreturn predictor has been moved to the tree level. The rtl-level
predictors estimate this branch about 20%, which isn't enough to get