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[Bug tree-optimization/53465] [4.7 regression] wrong code with -O1 -ftree-vrp
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 24 May 2012 11:51:15 +0000
- Subject: [Bug tree-optimization/53465] [4.7 regression] wrong code with -O1 -ftree-vrp
- Auto-submitted: auto-generated
- References: <bug-53465-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53465
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-05-24 11:51:15 UTC ---
Author: jakub
Date: Thu May 24 11:51:09 2012
New Revision: 187827
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187827
Log:
PR tree-optimization/53465
* tree-vrp.c (extract_range_from_cond_expr): First copy_value_range
vr0 into *vr, then vrp_meet that.
(vrp_meet): If one vr type is VR_UNDEFINED, ensure the result doesn't
have any equivalences.
(vrp_visit_phi_node): Call copy_value_range instead of vrp_meet the
first time.
* gcc.c-torture/execute/pr53465.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr53465.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c