[Bug target/80125] [7 Regression] r246297 causes segfault in reg_used_between_p()

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80125

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Mar 21 14:49:51 2017
New Revision: 246323

URL: https://gcc.gnu.org/viewcvs?rev=246323&root=gcc&view=rev
Log:
        PR target/80125
        * combine.c (can_combine_p): Revert the 2017-03-20 change, only
        check reg_used_between_p between insn and one of succ or succ2
        depending on if succ is artificial insn not inserted into insn
        stream.

        * gcc.target/powerpc/pr80125.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr80125.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog