[Bug target/85945] [6/7 Regression] ICE in resolve_subreg_use, at lower-subreg.c:751

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85945

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jun 22 21:29:24 2018
New Revision: 261967

URL: https://gcc.gnu.org/viewcvs?rev=261967&root=gcc&view=rev
Log:
        Backported from mainline
        2018-06-14  Jakub Jelinek  <ja...@redhat.com>

        PR target/85945
        * lower-subreg.c (find_decomposable_subregs): Don't decompose float
        subregs of multi-word pseudos unless the float mode has word size.

        * gcc.c-torture/compile/pr85945.c: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.c-torture/compile/pr85945.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/lower-subreg.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog