[Bug tree-optimization/92734] Missing match.pd simplification done by fold_binary_loc on generic

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92734

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Dec  3 09:20:43 2019
New Revision: 278925

URL: https://gcc.gnu.org/viewcvs?rev=278925&root=gcc&view=rev
Log:
        PR tree-optimization/92734
        * match.pd ((CST1 - A) +- CST2 -> CST3 - A,
        CST1 - (CST2 - A) -> CST3 + A): Handle nop casts around
        inner subtraction.

        * gcc.dg/tree-ssa/pr92734.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr92734.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog