[lldb] [llvm] [AArch64][llvm] Tighten SYSP parsing; don't disassemble invalid encodings (PR #182410)

[Jonathan Thackray via llvm-commits]

================
@@ -2111,14 +2119,37 @@ class MSRpstateImm0_1
 }
 
 // SYS and SYSL generic system instructions.
-def SysCRAsmOperand : AsmOperandClass {
-  let Name = "SysCR";
+class SysCRAsmOperand<int Low, int High> : AsmOperandClass {
+  let Name = "SysCR" # Low # "_" # High;
+  let RenderMethod = "addSysCROperands";
   let ParserMethod = "tryParseSysCROperand";
+  let PredicateMethod = "isSysCRInRange<" # Low # "," # High # ">";
+  let DiagnosticType = "InvalidSysCR" # Low # "_" # High;
 }
 
+def SysCRm0_7AsmOperand : SysCRAsmOperand<0, 7>;
+def SysCRn8_9AsmOperand : SysCRAsmOperand<8, 9>;
+def SysCR0_15AsmOperand : SysCRAsmOperand<0, 15>;
----------------
jthackray wrote:

Done.

https://github.com/llvm/llvm-project/pull/182410