[Bug middle-end/80539] [5/6/7 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80539

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 27 11:42:57 2017
New Revision: 247322

URL: https://gcc.gnu.org/viewcvs?rev=247322&root=gcc&view=rev
Log:
2017-04-27  Richard Biener  <rguent...@suse.de>

        PR middle-end/80539
        * tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
        being in loop-closed SSA form conservatively.
        (chrec_fold_multiply_poly_poly): Likewise.

        * gcc.dg/torture/pr80539.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr80539.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-chrec.c