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[Bug tree-optimization/81455] [7 Regression] Compile-time hog w/ -O1 -funswitch-loops
- 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: Tue, 25 Jul 2017 13:25:26 +0000
- Subject: [Bug tree-optimization/81455] [7 Regression] Compile-time hog w/ -O1 -funswitch-loops
- Auto-submitted: auto-generated
- References: <bug-81455-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81455
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Summary|[7/8 Regression] |[7 Regression] Compile-time
|Compile-time hog w/ -O1 |hog w/ -O1 -funswitch-loops
|-funswitch-loops |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 25 13:24:51 2017
New Revision: 250518
URL: https://gcc.gnu.org/viewcvs?rev=250518&root=gcc&view=rev
Log:
2017-07-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/81455
* tree-ssa-loop-unswitch.c (find_loop_guard): Make sure to
not walk in cycles when looking for guards.
* gcc.dg/pr81455.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr81455.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-unswitch.c