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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/67630] ymm and zmm register aren't preserved in interrupt handler
Date: Fri, 18 Sep 2015 17:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67630

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-09-18
     Ever confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
ix86_compute_frame_layout has

  /* Align and set SSE register save area.  */
  if (frame->nsseregs)
    {
      /* The only ABI that has saved SSE registers (Win64) also has a
         16-byte aligned default stack, and thus we don't need to be
         within the re-aligned local stack frame to save them.  */
      gcc_assert (INCOMING_STACK_BOUNDARY >= 128); 
      offset = (offset + 16 - 1) & -16;
      offset += frame->nsseregs * 16; 
    }

It isn't true for interrupt handler.