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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/102027] [11/12 Regression] ABI break when using vector
 type in function arg/return value
Date: Mon, 23 Aug 2021 19:12:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102027

--- Comment #2 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
gcc-11 does:

0000000000000000 <check2237>:
   0:   55                      push   %rbp
   1:   48 89 e5                mov    %rsp,%rbp
   4:   48 8b 05 00 00 00 00    mov    0x0(%rip),%rax        # b
<check2237+0xb>
                        7: R_X86_64_PC32        check2237_ret-0x4
   b:   66 48 0f 6e c0          movq   %rax,%xmm0
  10:   5d                      pop    %rbp
  11:   c3                      retq=20=20=20

and for reference, clang-12:

0000000000000000 <check2237>:
   0:   55                      push   %rbp
   1:   48 89 e5                mov    %rsp,%rbp
   4:   48 8b 04 25 00 00 00    mov    0x0,%rax
   b:   00=20
                        8: R_X86_64_32S check2237_ret
   c:   48 89 45 f8             mov    %rax,-0x8(%rbp)
  10:   f2 0f 10 45 f8          movsd  -0x8(%rbp),%xmm0
  15:   5d                      pop    %rbp
  16:   c3                      retq=20=20=20

These are the same.=