[Bug rtl-optimization/84878] ICE: Segmentation fault (in add_cross_iteration_register_deps)

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84878

--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Wed Apr  4 15:35:03 2018
New Revision: 259085

URL: https://gcc.gnu.org/viewcvs?rev=259085&root=gcc&view=rev
Log:
gcc/
        PR rtl-optimization/84878
        * ddg.c (add_cross_iteration_register_deps): Use DF_REF_BB to determine
        the basic block.  Assert the use reference is not artificial and that
        it has an associated insn.

gcc/testsuite/
        PR rtl-optimization/84878
        * gcc.target/powerpc/pr84878.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr84878.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ddg.c
    trunk/gcc/testsuite/ChangeLog