https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91927
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the following patch is the correct fix:
diff --git a/gcc/config/aarch64/aarch64-simd.md
b/gcc/config/aarch64/aarch64-simd.md
index ad4676bc167..787323255cb 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -41,7 +41,7 @@
(define_expand "movmisalign<mode>"
[(set (match_operand:VALL 0 "nonimmediate_operand")
(match_operand:VALL 1 "general_operand"))]
- "TARGET_SIMD"
+ "TARGET_SIMD && !STRICT_ALIGNMENT"
{
/* This pattern is not permitted to fail during expansion: if both arguments
are non-registers (e.g. memory := constant, which can be created by the
Basically movmisalign should not be there if strict alignment as it is just
emitting a set.
