[Bug tree-optimization/93040] gcc doesn't optimize unaligned accesses to a 16-bit value on the x86 as well as it does a 32-bit value (or clang)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93040

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jan  9 10:29:54 2020
New Revision: 280034

URL: https://gcc.gnu.org/viewcvs?rev=280034&root=gcc&view=rev
Log:
2020-01-09  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/93040
        * gimple-ssa-store-merging.c (find_bswap_or_nop): Raise search limit.

        * gcc.dg/optimize-bswaphi-1.c: Amend.
        * gcc.dg/optimize-bswapsi-2.c: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-store-merging.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/optimize-bswaphi-1.c
    trunk/gcc/testsuite/gcc.dg/optimize-bswapsi-2.c