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From: "lasse.collin at tukaani dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111555] New: [AArch64] __ARM_FEATURE_UNALIGNED should be
 undefined with -mstrict-align
Date: Sat, 23 Sep 2023 17:42:11 +0000
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X-Bugzilla-Product: gcc
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X-Bugzilla-Version: 13.2.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111555

            Bug ID: 111555
           Summary: [AArch64] __ARM_FEATURE_UNALIGNED should be undefined
                    with -mstrict-align
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lasse.collin at tukaani dot org
  Target Milestone: ---

On 32-bit ARM, the macro __ARM_FEATURE_UNALIGNED is defined when using
-munaligned-access and not defined when using -mno-unaligned-access. On AAr=
ch64
the macro is always defined with both -mno-strict-align and -mstrict-align.=
 I
think the macro shouldn't be defined with -mstrict-align on AArch64.

For comparison, with Clang on AArch64 the definition of __ARM_FEATURE_UNALI=
GNED
is omitted with -mstrict-align and -mno-unaligned-access.=