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[Bug tree-optimization/52678] [4.7 Regression] internal compiler error: in vect_update_ivs_after_vectorizer, at tree-vect-loop-manip.c:1842
- 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: Fri, 23 Mar 2012 11:34:37 +0000
- Subject: [Bug tree-optimization/52678] [4.7 Regression] internal compiler error: in vect_update_ivs_after_vectorizer, at tree-vect-loop-manip.c:1842
- Auto-submitted: auto-generated
- References: <bug-52678-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52678
--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-23 11:34:37 UTC ---
Author: rguenth
Date: Fri Mar 23 11:34:32 2012
New Revision: 185734
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185734
Log:
2012-03-23 Richard Guenther <rguenther@suse.de>
PR tree-optimization/52678
* tree-vectorizer.h (struct _stmt_vec_info): Add
loop_phi_evolution_part member.
(STMT_VINFO_LOOP_PHI_EVOLUTION_PART): New define.
* tree-vect-loop.c (vect_analyze_scalar_cycles_1): Initialize
STMT_VINFO_LOOP_PHI_EVOLUTION_PART.
* tree-vect-loop-manip.c (vect_update_ivs_after_vectorizer):
Use the cached evolution part and the PHI nodes value from
the loop preheader edge instead of re-analyzing the evolution.
* gfortran.dg/pr52678.f: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr52678.f
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop-manip.c
trunk/gcc/tree-vect-loop.c
trunk/gcc/tree-vectorizer.h