[Bug tree-optimization/77479] [7 Regression] Compile time hog w/ -O2 (-Os)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77479

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep  6 12:51:01 2016
New Revision: 240007

URL: https://gcc.gnu.org/viewcvs?rev=240007&root=gcc&view=rev
Log:
2016-09-06  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/77479
        * tree-vrp.c (update_value_range): Extend overflow handling to
        VARYING.

        * gcc.dg/torture/pr77479.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr77479.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c