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[Bug tree-optimization/81388] [7/8 Regression] Incorrect code generation with -O1
- From: "amker 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 Jul 2017 08:56:58 +0000
- Subject: [Bug tree-optimization/81388] [7/8 Regression] Incorrect code generation with -O1
- Auto-submitted: auto-generated
- References: <bug-81388-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81388
--- Comment #10 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Jul 25 08:56:26 2017
New Revision: 250497
URL: https://gcc.gnu.org/viewcvs?rev=250497&root=gcc&view=rev
Log:
Backport from 2017-07-20 trunk r250384.
PR tree-optimization/81388
Revert r238585:
2016-07-21 Bin Cheng <bin.cheng@arm.com>
* tree-ssa-loop-niter.c (number_of_iterations_lt_to_ne): Clean up
by removing computation of may_be_zero.
gcc/testsuite
PR tree-optimization/81388
* gcc.dg/tree-ssa/pr81388-1.c: New test.
* gcc.dg/tree-ssa/pr81388-2.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/tree-ssa/pr81388-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/tree-ssa/pr81388-2.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-loop-niter.c