[Bug tree-optimization/71887] [7 Regression] wrong code (SIGFPE) at -O1 and above on x86_64-linux-gnu (in both 32-bit and 64-bit modes)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71887

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jul 15 12:56:17 2016
New Revision: 238373

URL: https://gcc.gnu.org/viewcvs?rev=238373&root=gcc&view=rev
Log:
2016-07-15  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71887
        * tree-ssa-phiopt.c (absorbing_element_p): Add rhs arg and
        verify it is not zero for division / modulo handling.
        (value_replacement): Adjust.

        * gcc.dg/torture/pr71887.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71887.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-phiopt.c