[Bug rtl-optimization/89195] [7/8 regression] Corrupted stack offset after combine

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89195

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Feb  7 14:55:04 2019
New Revision: 268646

URL: https://gcc.gnu.org/viewcvs?rev=268646&root=gcc&view=rev
Log:
        Backported from mainline
        2019-02-05  Jakub Jelinek  <ja...@redhat.com>

        PR rtl-optimization/89195
        * combine.c (make_extraction): For MEMs, don't extract bytes outside
        of the original MEM.

        * gcc.c-torture/execute/pr89195.c: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr89195.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/combine.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog