[Bug tree-optimization/78574] [7 Regression] ice on valid C code at -O2 and -O3 in both 32- and 64-bit modes on x86_64-linux-gnu (internal compiler error: Segmentation fault (program cc1))

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78574

--- Comment #6 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 30 14:41:09 2016
New Revision: 243026

URL: https://gcc.gnu.org/viewcvs?rev=243026&root=gcc&view=rev
Log:
        PR tree-optimization/78574
        * tree-ssa-loop-ivopts.c (find_deriving_biv_for_expr): Skip loop
        header PHI that doesn't define biv.
        gcc/testsuite
        PR tree-optimization/78574
        * gcc.c-torture/compile/pr78574.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr78574.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c