[Bug tree-optimization/86017] multiple consecutive calls to bzero/memset not merged

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86017

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jun  1 10:49:54 2018
New Revision: 261061

URL: https://gcc.gnu.org/viewcvs?rev=261061&root=gcc&view=rev
Log:
2018-06-01  Richard Biener  <rguent...@suse.de>

        PR middle-end/86017
        * gimple-fold.c (var_decl_component_p): Also allow offsetted
        vars wrapped in MEM_REFs.

        * gcc.dg/tree-ssa/pr86017.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr86017.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog