[Bug tree-optimization/80054] [7 Regression] ICE in verify_ssa with -O3 -march=broadwell/skylake-avx512

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80054

--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Mar 20 20:04:25 2017
New Revision: 246290

URL: https://gcc.gnu.org/viewcvs?rev=246290&root=gcc&view=rev
Log:
[gcc]

2017-03-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR tree-optimization/80054
        * gimple-ssa-strength-reduction.c (all_phi_incrs_profitable): Fail
        the optimization if a PHI or any of its arguments is not dominated
        by the candidate's basis.  Use gphi* rather than gimple* as
        appropriate.
        (replace_profitable_candidates): Clean up a gimple* variable that
        should be a gphi* variable.

[gcc/testsuite]

2017-03-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR tree-optimization/80054
        * g++.dg/torture/pr80054.C: New file.


Added:
    trunk/gcc/testsuite/g++.dg/torture/pr80054.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-strength-reduction.c
    trunk/gcc/testsuite/ChangeLog