[Bug tree-optimization/92119] [10 Regression] ICE: SIGSEGV in contains_struct_check (tree.h:3380) with -Os -fno-tree-dce -fno-tree-dse -ftree-slp-vectorize

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92119

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-10-16
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
   Target Milestone|---                         |10.0
     Ever confirmed|0                           |1

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

#1  0x00000000021a8ad9 in vect_recog_rotate_pattern (stmt_vinfo=0x34753f0, 
    type_out=0x7fffffffd030) at /tmp/trunk/gcc/tree-vect-patterns.c:2202
2202          if (TYPE_PRECISION (TREE_TYPE (lhs)) != 16
(gdb) p lhs
$1 = <tree 0x0>
(gdb) l
2197             The vectorizer has bswap support, but only if the argument
isn't
2198             promoted.  */
2199          lhs = gimple_call_lhs (last_stmt);
2200          oprnd0 = gimple_call_arg (last_stmt, 0);
2201          type = TREE_TYPE (oprnd0);
2202          if (TYPE_PRECISION (TREE_TYPE (lhs)) != 16
2203              || TYPE_PRECISION (type) <= 16
2204              || TREE_CODE (oprnd0) != SSA_NAME
2205              || BITS_PER_UNIT != 8
2206              || !TYPE_UNSIGNED (TREE_TYPE (lhs)))
(gdb) p last_stmt
$2 = <gimple_call 0x7ffff7fefe10>
(gdb) p debug_gimple_stmt (last_stmt)
__builtin_bswap16 (_7);