[llvm] [AArch64] "Support" debug info for SVE types on Windows. (PR #147865)

[Benjamin Maxwell via llvm-commits]

================
@@ -353,6 +355,12 @@ class LLVM_ABI MCRegisterInfo {
     L2CVRegs[LLVMReg] = CVReg;
   }
 
+  void ignoreCVReg(MCRegister LLVMReg) { IgnoredCVRegs.insert(LLVMReg); }
+
+  bool isIgnoredCVReg(MCRegister LLVMReg) const {
+    return IgnoredCVRegs.contains(LLVMReg);
+  }
----------------
MacDue wrote:

I think you could skip the `DenseSet` and just do: 
```suggestion
  bool isIgnoredCVReg(MCRegister LLVMReg) const {
    return (LLVMReg >=  AArch64::Z0 && LLVMReg <= AArch64::Z31)
                || (LLVMReg >= AArch64::P0 && LLVMReg <= AArch64::P15);
  }
```

https://github.com/llvm/llvm-project/pull/147865