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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/94591] [8/9/10/11 Regression] Assembler messages: Error:
 operand mismatch -- `rev64 v0.2d,v0.2d' (or `rev32 v0.2s,v0.2s')
Date: Fri, 29 May 2020 13:06:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94591

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Alex Coplan
<acoplan@gcc.gnu.org>:

https://gcc.gnu.org/g:49824d35e0c87a5fdb3f5ea41223aa21d6ca6bfc

commit r10-8207-g49824d35e0c87a5fdb3f5ea41223aa21d6ca6bfc
Author: Alex Coplan <alex.coplan@arm.com>
Date:   Fri May 29 14:05:11 2020 +0100

    aarch64: PR target/94591: Don't generate invalid REV64 insns

    This fixes PR94591. The problem was the function aarch64_evpc_rev_local=
()
    matching vector permutations that were not reversals. In particular, pr=
ior
to
    this patch, this function matched the identity permutation which led to
    generating bogus REV64 insns which were rejected by the assembler.

    gcc/
            PR target/94591
            * config/aarch64/aarch64.c (aarch64_evpc_rev_local): Don't match
            identity permutation.

    gcc/testsuite/
            PR target/94591
            * gcc.c-torture/execute/pr94591.c: New test.

    (cherry picked from commit 98452668d362bb9e6358f7eb5cff69f4f5ab1d45)=