This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/49651] [C++0x] nested lambdas and -O3 produced incorrect integer variable increments
- From: "jason at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 12 Jul 2011 14:38:54 +0000
- Subject: [Bug tree-optimization/49651] [C++0x] nested lambdas and -O3 produced incorrect integer variable increments
- Auto-submitted: auto-generated
- References: <bug-49651-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49651
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Component|c++ |tree-optimization
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-07-12 14:38:53 UTC ---
With current pre-4.6.2 I find that it fails with
-O2 -fno-thread-jumps -fno-align-functions -fno-align-jumps -fno-align-loops
-fno-align-labels -fno-caller-saves -fno-crossjumping
-fno-cse-follow-jumps -fno-cse-skip-blocks
-fno-delete-null-pointer-checks -fno-expensive-optimizations
-fno-gcse -fno-gcse-lm -fno-inline-small-functions
-fno-indirect-inlining -fno-ipa-sra
-fno-optimize-sibling-calls -fno-peephole2 -fno-regmove
-fno-reorder-blocks -fno-reorder-functions
-fno-rerun-cse-after-loop -fno-sched-interblock -fno-sched-spec
-fno-schedule-insns -fno-schedule-insns2 -fno-strict-aliasing
-fno-strict-overflow -fno-tree-switch-conversion
-fno-tree-pre -fno-tree-vrp -fno-devirtualize -fno-ipa-cp
-fno-tree-builtin-call-dce -fno-auto-inc-dec -fno-cprop-registers -fno-dce
-fno-defer-pop -fno-delayed-branch -fno-dse -fno-guess-branch-probability
-fno-if-conversion -fno-if-conversion2 -fno-ipa-pure-const -fno-ipa-reference
-fno-merge-constants -fno-split-wide-types -fno-tree-builtin-call-dce
-fno-tree-ccp -fno-tree-ch -fno-tree-copyrename -fno-tree-dce
-fno-tree-forwprop -fno-tree-phiprop -fno-tree-sra -fno-tree-ter
But adding -O1, -fno-tree-pta or -fno-tree-fre makes it work.
There only seem to be a few places that depend on optimize being 1 vs 2.
Changing category to tree-optimization.