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From: "haochen.jiang at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111889] New: [14 Regression] 128/256 intrins could not
 be used with only specifying "no-evex512, avx512vl" in function attribute
Date: Fri, 20 Oct 2023 06:40:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111889

            Bug ID: 111889
           Summary: [14 Regression] 128/256 intrins could not be used with
                    only specifying "no-evex512, avx512vl" in function
                    attribute
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: haochen.jiang at intel dot com
  Target Milestone: ---

Created attachment 56155
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D56155&action=3Dedit
Simple testcase

With this simple testcase and command like this:

x86_64-pc-linux-gnu-gcc -O2 -march=3Dx86-64 1.c

We will finally get:

error: inlining failed in call to =E2=80=98always_inline=E2=80=99 =E2=80=98=
_mm256_mask_mov_pd=E2=80=99: target
specific option mismatch

But if we use the command like this:

x86_64-pc-linux-gnu-gcc -O2 -march=3Dx86-64 -mno-evex512 1.c

It seems that the default handle for evex512 with avx512 will finally let t=
he
compiler wrongly suppose that 128/256 bit intrins need evex512 feature when
co-operating with function attribute, but actually it does not.=