[Bug tree-optimization/61452] [4.8 Regression] hang at -O1 and -Os on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61452

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep  9 14:45:57 2014
New Revision: 215081

URL: https://gcc.gnu.org/viewcvs?rev=215081&root=gcc&view=rev
Log:
2014-09-09  Richard Biener  <rguent...@suse.de>

    Backport from mainline
    2014-06-11  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/61452
    * tree-ssa-sccvn.c (visit_phi): Remove pointless setting of
    expr and has_constants in case we found a leader.
    (simplify_binary_expression): Always valueize operands first.
    (simplify_unary_expression): Likewise.

    * gcc.dg/torture/pr61452.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr61452.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-ssa-sccvn.c