[Bug tree-optimization/72824] [5/6/7 Regression] Signed floating point zero semantics broken at optimization level -O3 (tree-loop-distribute-patterns)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72824

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug  9 07:49:14 2016
New Revision: 239275

URL: https://gcc.gnu.org/viewcvs?rev=239275&root=gcc&view=rev
Log:
        PR tree-optimization/72824
        * tree-loop-distribution.c (const_with_all_bytes_same): Verify
        real_zerop is not negative.

        * gcc.c-torture/execute/ieee/pr72824.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/ieee/pr72824.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-loop-distribution.c