[Bug tree-optimization/84111] [8 Regression] Compile time hog w/ -O2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84111

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan 30 15:58:22 2018
New Revision: 257188

URL: https://gcc.gnu.org/viewcvs?rev=257188&root=gcc&view=rev
Log:
        PR tree-optimization/84111
        * tree-ssa-loop-ivcanon.c (tree_unroll_loops_completely_1): Skip
        inner loops added during recursion, as they don't have up-to-date
        SSA form.

        * gcc.c-torture/compile/pr84111.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr84111.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivcanon.c