[Bug tree-optimization/82128] [8 Regression] ICE on valid code

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82128

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 13 08:13:03 2017
New Revision: 252062

URL: https://gcc.gnu.org/viewcvs?rev=252062&root=gcc&view=rev
Log:
2017-09-13  Richard Biener  <rguenther@suse.de>

        PR middle-end/82128
        * gimple-fold.c (gimple_fold_call): Update SSA name in-place to
        default-def to avoid breaking iterator update with the weird
        interaction with cgraph_update_edges_for_call_stmt_node.

        * g++.dg/pr82128.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/pr82128.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog