[Bug tree-optimization/67690] [5/6 Regression] wrong code with -O2 on x86_64/Linux

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67690

--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Sep 30 11:45:40 2015
New Revision: 228287

URL: https://gcc.gnu.org/viewcvs?rev=228287&root=gcc&view=rev
Log:
        PR tree-optimization/67690
        * tree-ssa-ifcombine.c (pass_tree_ifcombine::execute): Call
        reset_flow_sensitive_info_in_bb.
        * tree-ssa-tail-merge.c: Include "stringpool.h" and "tree-ssanames.h".
        (replace_block_by): Call reset_flow_sensitive_info_in_bb.
        * tree-ssanames.c: Include "gimple-iterator.h".
        (reset_flow_sensitive_info_in_bb): New function.
        * tree-ssanames.h (reset_flow_sensitive_info_in_bb): Declare.

        * gcc.dg/torture/pr67690.c: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr67690.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/tree-ssa-ifcombine.c
    branches/gcc-5-branch/gcc/tree-ssa-tail-merge.c
    branches/gcc-5-branch/gcc/tree-ssanames.c
    branches/gcc-5-branch/gcc/tree-ssanames.h