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

[Sameer Sahasrabuddhe via cfe-commits]

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@@ -653,6 +677,11 @@ class WaitcntBrackets {
     return It != VMem.end() ? It->second.Scores[T] : 0;
   }
 
+  unsigned getClampedWait(InstCounterType T, unsigned ScoreToWait) const {
+    return std::min(getScoreUB(T) - ScoreToWait,
+                    Context->getWaitCountMax(T) - 1);
+  }
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ssahasra wrote:

That function is not critical to this change. I just reverted it for now.

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