[Bug middle-end/69845] [4.9/5/6 Regression] Expression getting incorrectly optimized after being rewritten by compiler

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69845

--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Mar 24 17:52:11 2016
New Revision: 234462

URL: https://gcc.gnu.org/viewcvs?rev=234462&root=gcc&view=rev
Log:
2016-03-24  Richard Henderson  <r...@redhat.com>

        PR middle-end/69845
        * fold-const.c (extract_muldiv_1): Correct test for multiplication
        overflow.

        PR middle-end/69845
        * gcc.dg/tree-ssa/pr69845-1.c: New test.
        * gcc.dg/tree-ssa/pr69845-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr69845-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr69845-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog