[Bug tree-optimization/71428] [7 Regression] wrong code with -Os -fno-tree-forwprop (breaks in the .bswap dump)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71428

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun  7 07:31:40 2016
New Revision: 237167

URL: https://gcc.gnu.org/viewcvs?rev=237167&root=gcc&view=rev
Log:
2016-06-07  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71428
        * tree-ssa-math-opts.c (perform_symbolic_merge): Properly distinguish
        BIT_FIELD_REF op vs. load.

        * gcc.dg/torture/pr71428.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71428.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-math-opts.c