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[Bug tree-optimization/77283] [7 Regression] Revision 238005 disables loop unrolling
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 18 Aug 2016 12:24:09 +0000
- Subject: [Bug tree-optimization/77283] [7 Regression] Revision 238005 disables loop unrolling
- Authentication-results: sourceware.org; auth=none
- Auto-submitted: auto-generated
- References: <bug-77283-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77283
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #7)
> Also my adjustment of gcc.dg/tree-ssa/split-path-7.c was only good in my dev
> tree for some reason. Otherwise bootstrapped / tested on
> x86_64-unknown-linux-gnu.
Ah, that's because my dev tree has store commoning during sinking which turns
if ()
*dp = ...
else
*dp = ...
if (++dp)
goto loop;
into
if ()
...
else
...
*dp = ...
if (++dp)
goto loop;
making the block artificially interesting.