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[Bug tree-optimization/47271] [4.6 Regression] if-conversion removes a test (if), the function generates invalid outputs
- From: "spop 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 Jan 2011 14:52:16 +0000
- Subject: [Bug tree-optimization/47271] [4.6 Regression] if-conversion removes a test (if), the function generates invalid outputs
- Auto-submitted: auto-generated
- References: <bug-47271-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47271
--- Comment #16 from Sebastian Pop <spop at gcc dot gnu.org> 2011-01-25 14:51:28 UTC ---
Author: spop
Date: Tue Jan 25 14:51:23 2011
New Revision: 169233
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169233
Log:
Fix PR47271: only if-convert full writes.
2011-01-25 Sebastian Pop <sebastian.pop@amd.com>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/47271
* tree-if-conv.c (bb_postdominates_preds): New.
(if_convertible_bb_p): Call bb_postdominates_preds.
(if_convertible_loop_p_1): Compute CDI_POST_DOMINATORS.
(predicate_scalar_phi): Call bb_postdominates_preds.
* gcc.dg/tree-ssa/ifc-pr47271.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ifc-pr47271.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c