[clang] [llvm] [AMDGPU] Introduce asyncmark/wait intrinsics (PR #173259)

[Jay Foad via cfe-commits]

================
@@ -566,6 +569,35 @@ class SIInsertWaitcnts {
     return VmemReadMapping[getVmemType(Inst)];
   }
 
+  bool hasCPolAsyncBit(const MachineInstr &MI) const {
+    const MachineOperand *CPol = TII->getNamedOperand(MI, 
AMDGPU::OpName::cpol);
+    if (!CPol || !CPol->isImm())
----------------
jayfoad wrote:

CPol is always an immarg.
```suggestion
    if (!CPol)
```

https://github.com/llvm/llvm-project/pull/173259
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