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[Bug tree-optimization/81365] [7/8 Regression] GCC miscompiles swap
- 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: Mon, 17 Jul 2017 09:10:55 +0000
- Subject: [Bug tree-optimization/81365] [7/8 Regression] GCC miscompiles swap
- Auto-submitted: auto-generated
- References: <bug-81365-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81365
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Jul 17 09:10:23 2017
New Revision: 250261
URL: https://gcc.gnu.org/viewcvs?rev=250261&root=gcc&view=rev
Log:
PR tree-optimization/81365
* tree-ssa-phiprop.c (propagate_with_phi): When considering hoisting
aggregate moves onto bb predecessor edges, make sure there are no
loads that could alias the lhs in between the start of bb and the
loads from *phi.
* g++.dg/torture/pr81365.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr81365.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiprop.c