[Bug rtl-optimization/78038] [5/6 Regression] internal compiler error: in get_sub_rtx, at ree.c:655

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78038

--- Comment #11 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Nov  1 10:29:40 2016
New Revision: 241735

URL: https://gcc.gnu.org/viewcvs?rev=241735&root=gcc&view=rev
Log:
[ree] PR rtl-optimization/78038: Handle global register dataflow definitions in
ree

        Backport from mainline
        2016-10-21  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        PR rtl-optimization/78038
        * ree.c (get_defs): Return NULL if a defining insn for REG cannot
        be deduced to set REG through the RTL structure.
        (make_defs_and_copies_lists): Return false on a failing get_defs call.

        * gcc.target/aarch64/pr78038.c: New test.


Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.target/aarch64/pr78038.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/ree.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog