[Bug tree-optimization/81346] Missed constant propagation into comparison

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81346

--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jul 19 13:10:05 2017
New Revision: 250342

URL: https://gcc.gnu.org/viewcvs?rev=250342&root=gcc&view=rev
Log:
        PR tree-optimization/81346
        * match.pd: Optimize (X - 1U) <= INT_MAX-1U into (int) X > 0.

        * gcc.dg/tree-ssa/pr81346-5.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr81346-5.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog