[Bug tree-optimization/68911] [6 Regression] wrong code with -O1 -ftree-vrp

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68911

--- Comment #7 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Jan 12 17:49:51 2016
New Revision: 232286

URL: https://gcc.gnu.org/viewcvs?rev=232286&root=gcc&view=rev
Log:

        PR tree-optimization/68911
        * tree-vrp.c (adjust_range_with_scev): Check overflow in range
        information computed for expression "init + nit * step".

        gcc/testsuite/ChangeLog
        PR tree-optimization/68911
        * gcc.c-torture/execute/pr68911.c: New test.


Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr68911.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c