tree 4a26ef2d8e08d5e85b5602c32e89513845794f6e
parent 9c2be4c22d78cebc52458ba7298a470a3be0cdce
author fanzha02 <fannie.zhang@arm.com> 1529058000 +0000
committer Cherry Zhang <cherryyz@google.com> 1536262923 +0000

cmd/internal/obj/arm64: add CONSTRAINED UNPREDICTABLE behavior check for some load/store

According to ARM64 manual, it is "constrained unpredictable behavior"
if the src and dst registers of some load/store instructions are same.
In order to completely prevent such unpredictable behavior, adding the
check for load/store instructions that are supported by the assembler
in the assembler.

Add test cases.

Update #25823

Change-Id: I64c14ad99ee543d778e7ec8ae6516a532293dbb3
Reviewed-on: https://go-review.googlesource.com/120660
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>