[Bug target/59797] New: GCC doesn't warn AVX-512 ABI change

["hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59797

            Bug ID: 59797
           Summary: GCC doesn't warn AVX-512 ABI change
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: kirill.yukhin at intel dot com

[hjl@gnu-6 gcc]$ cat /tmp/z.i
typedef long long __m512i __attribute__ ((__vector_size__ (64),
__may_alias__));

__m512i
f1(__m512i x, __m512i y)
{
  return y;
}
[hjl@gnu-6 gcc]$ ./xgcc -B./ -S -O /tmp/z.i
/tmp/z.i: In function ‘f1’:
/tmp/z.i:4:1: note: The ABI for passing parameters with 64-byte alignment has
changed in GCC 4.6
 f1(__m512i x, __m512i y)
 ^
[hjl@gnu-6 gcc]$ ./xgcc -B./ -S -O /tmp/z.i -mavx512f
[hjl@gnu-6 gcc]$ 

When -mavx512f isn't used, GCC should warn ABI changes for passing/returning
AVX vector values.
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/59797] GCC doesn't warn AVX-512 ABI change
Date: Mon, 13 Jan 2014 22:23:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY797

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-01-13
   Target Milestone|---                         |4.9.0
     Ever confirmed|0                           |1