Patchwork Initial shrink-wrapping patch

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Submitter Bernd Schmidt
Date Oct. 5, 2011, 5:19 p.m.
Message ID <4E8C9192.9090500@codesourcery.com>
Download mbox | patch
Permalink /patch/117897/
State New
Headers show

Comments

Bernd Schmidt - Oct. 5, 2011, 5:19 p.m.
On 10/05/11 00:29, Richard Henderson wrote:
> As a followup, I think this option needs to be disabled for profiling
> and profile_after_prologue.  Should be a mere matter of frobbing the
> options at startup.

The other code seems to test crtl->profile rather than an option flag,
so how's this? Bootstrapped along with the x86_64 fix.


Bernd
* function.c (thread_prologue_and_epilogue_insns): Don't shrink-wrap
	if profiling after the prologue.
Richard Henderson - Oct. 5, 2011, 5:51 p.m.
On 10/05/2011 10:19 AM, Bernd Schmidt wrote:
> 	* function.c (thread_prologue_and_epilogue_insns): Don't shrink-wrap
> 	if profiling after the prologue.

Ok.


r~

Patch

Index: gcc/function.c
===================================================================
--- gcc/function.c	(revision 179553)
+++ gcc/function.c	(working copy)
@@ -5571,6 +5571,7 @@  thread_prologue_and_epilogue_insns (void
       }
       
   if (flag_shrink_wrap && HAVE_simple_return
+      && (targetm.profile_before_prologue () || !crtl->profile)
       && nonempty_prologue && !crtl->calls_eh_return)
     {
       HARD_REG_SET prologue_clobbered, prologue_used, live_on_edge;