[Bug tree-optimization/77937] [7 Regression] ICE: in replace_one_candidate, at gimple-ssa-strength-reduction.c:3370

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77937

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-10-11
                 CC|                            |wschmidt at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r240945:

commit 41b5b58f52ee35f1efe7eeac644db6992dac5499
Author: wschmidt <wschmidt@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Oct 10 18:39:41 2016 +0000

    2016-10-10  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

            PR tree-optimization/77824
            * gimple-ssa-strength-reduction.c (stmt_cost): Explicitly return
            zero cost for copies.
            (find_candidates_dom_walker::before_dom_children): Replace
            MODIFY_EXPR with SSA_NAME.
            (replace_mult_candidate): Likewise.
            (replace_profitable_candidates): Likewise.