[Bug middle-end/91131] Bad bitfield coalescing

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91131

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jul 11 07:32:04 2019
New Revision: 273376

URL: https://gcc.gnu.org/viewcvs?rev=273376&root=gcc&view=rev
Log:
2019-07-11  Richard Biener  <rguent...@suse.de>

        PR middle-end/91131
        * gimplify.c (gimplify_compound_literal_expr): Force a temporary
        when the object is volatile and we have not cleared it even though
        there are no nonzero elements.

        * gcc.target/i386/pr91131.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr91131.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog