[Bug tree-optimization/82157] [8 Regression] ICE on valid code at -O2 and -O3: cannot update SSA form

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82157

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 12 14:15:37 2017
New Revision: 252020

URL: https://gcc.gnu.org/viewcvs?rev=252020&root=gcc&view=rev
Log:
2017-09-12  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/82157
        * tree-ssa-pre.c (remove_dead_inserted_code): Do not remove
        stmts with side-effects.

        * gcc.dg/torture/pr82157.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr82157.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c