[Bug target/88861] [9 Regression] ICE in calc_dfs_tree, at dominance.c:458

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88861

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Aug 30 11:49:11 2019
New Revision: 275106

URL: https://gcc.gnu.org/viewcvs?rev=275106&root=gcc&view=rev
Log:
        Backported from mainline
        2019-01-16  David Malcolm  <dmalc...@redhat.com>

        PR target/88861
        * combine.c (delete_noop_moves): Convert to "bool" return,
        returning true if any edges are eliminated.
        (combine_instructions): Also return true if delete_noop_moves
        returns true.

        * g++.dg/opt/pr89188.C: Include ../torture/pr88861.C.

        2019-01-16  David Malcolm  <dmalc...@redhat.com>

        PR target/88861
        * g++.dg/torture/pr88861.C: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/g++.dg/torture/pr88861.C
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/combine.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog
    branches/gcc-7-branch/gcc/testsuite/g++.dg/opt/pr89188.C