[Bug target/100941] wrong code with __builtin_shufflevector() with -mavx512f

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100941

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |crazylht at gmail dot com

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
The issue seems to be related to generic part, not target specific

006t.gimple

U foo (V v, W w)
{
  U D.2852;

  _1 = {v, { 0, 0, 0, 0 }};
  _2 = BIT_INSERT_EXPR <_1, { 0, 0, 0, 0 }, 0>; <--- why bit position is 0 but
not 256?
  D.2852 = BIT_FIELD_REF <_2, 64, 0>;
  return D.2852;
}