[llvm] [AArch64][llvm] Redefine some insns as an alias of `SYS` (PR #187004)

[Jonathan Thackray via llvm-commits]

================
@@ -2560,6 +2553,30 @@ def SYSLxt : SystemLXtI<1, "sysl">;
 def : InstAlias<"sys $op1, $Cn, $Cm, $op2",
                 (SYSxt timm32_0_7:$op1, sys_cr_op:$Cn,
                  sys_cr_op:$Cm, timm32_0_7:$op2, XZR)>;
+def : InstAlias<"apas $Xt",
----------------
jthackray wrote:

Ok, I've moved these back into tablegen, which shrinks the diff size a lot.

https://github.com/llvm/llvm-project/pull/187004