[Bug tree-optimization/71059] [7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "vn_nary_op_insert_into"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71059

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 12 13:46:26 2016
New Revision: 236175

URL: https://gcc.gnu.org/viewcvs?rev=236175&root=gcc&view=rev
Log:
2016-05-12  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71059
        * tree-ssa-pre.c (phi_translate_1): Fully fold translated
        nary before looking up or entering the expression into the VN
        hashes.
        * tree-ssa-sccvn.c (vn_nary_build_or_lookup): Fix comment typo.
        Make sure to re-use NARYs without result as inserted by
        phi-translation.

        * gcc.dg/torture/pr71059.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71059.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c