https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80072

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*, i?86-*-*
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-03-17
      Known to work|                            |6.3.1
   Target Milestone|---                         |7.0
            Summary|ICE in                      |[7 Regression] ICE in
                   |gimple_build_assign_1 with  |gimple_build_assign_1 with
                   |-O3                         |-O3
                   |-march=broadwell/skylake-av |-march=broadwell/skylake-av
                   |x512                        |x512
     Ever confirmed|0                           |1
      Known to fail|                            |7.0.1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

#3  0x00000000013be796 in rewrite_expr_tree (
    stmt=<gimple_assign 0x7fffec0963c0>, opindex=8, ops=..., changed=true)
    at /space/rguenther/src/svn/gcc-7-branch/gcc/tree-ssa-reassoc.c:4243
4243                                           oe1->op, oe2->op);
(gdb) l
4238                  gimple *insert_point
4239                    = find_insert_point (stmt, oe1->op, oe2->op);
4240                  lhs = make_ssa_name (TREE_TYPE (lhs));
4241                  stmt
4242                    = gimple_build_assign (lhs, gimple_assign_rhs_code
(stmt),
4243                                           oe1->op, oe2->op);
(gdb) p gimple_assign_rhs_code (stmt)
$1 = NOP_EXPR

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