[Bug tree-optimization/90356] Missed optimization for variables initialized to 0.0

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90356

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May  8 07:21:48 2019
New Revision: 271001

URL: https://gcc.gnu.org/viewcvs?rev=271001&root=gcc&view=rev
Log:
        PR tree-optimization/90356
        * match.pd ((X +/- 0.0) +/- 0.0): Optimize into X +/- 0.0 if possible.

        * gcc.dg/tree-ssa/pr90356-1.c: New test.
        * gcc.dg/tree-ssa/pr90356-2.c: New test.
        * gcc.dg/tree-ssa/pr90356-3.c: New test.
        * gcc.dg/tree-ssa/pr90356-4.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90356-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90356-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90356-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90356-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog