[Bug rtl-optimization/62146] CSE replaces constant with an expression incorrectly

[eraman at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62146

--- Comment #3 from eraman at gcc dot gnu.org ---
Author: eraman
Date: Sat Sep  6 01:49:07 2014
New Revision: 214981

URL: https://gcc.gnu.org/viewcvs?rev=214981&root=gcc&view=rev
Log:
2014-09-05  Easwaran Raman  <eraman@google.com>

    Backport from mainline
        PR rtl-optimization/62146
        * ifcvt.c (dead_or_predicable): Make removal of REG_EQUAL note of
            hoisted instruction unconditional.

    testsuite:
        * testsuite/g++.dg/opt/pr62146.C: New.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/opt/pr62146.C
      - copied unchanged from r214977, trunk/gcc/testsuite/g++.dg/opt/pr62146.C
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/ifcvt.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog