[Bug tree-optimization/42587] bswap not recognized for memory

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42587

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 13 12:27:18 2016
New Revision: 236204

URL: https://gcc.gnu.org/viewcvs?rev=236204&root=gcc&view=rev
Log:
2016-05-13  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/42587
        * tree-ssa-math-opts.c (perform_symbolic_merge): Handle BIT_FIELD_REF.
        (find_bswap_or_nop_1): Likewise.
        (bswap_replace): Likewise.

        * gcc.dg/optimize-bswapsi-4.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/optimize-bswapsi-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-math-opts.c