[llvm-branch-commits] [llvm] [AMDGPU][Attributor] Skip update if an AA is at its initial state (PR #114726)

[Matt Arsenault via llvm-branch-commits]

================
@@ -1145,31 +1169,71 @@ struct AAAMDWavesPerEU : public AAAMDSizeRangeAttribute 
{
     auto &InfoCache = static_cast<AMDGPUInformationCache &>(A.getInfoCache());
     ChangeStatus Change = ChangeStatus::UNCHANGED;
 
+    Function *F = getAssociatedFunction();
+
+    const auto *AAFlatWorkGroupSize = A.getAAFor<AAAMDFlatWorkGroupSize>(
+        *this, IRPosition::function(*F), DepClassTy::REQUIRED);
+    if (!AAFlatWorkGroupSize || !AAFlatWorkGroupSize->isValidState()) {
+      LLVM_DEBUG(
+          dbgs() << '[' << getName()
+                 << "] AAAMDFlatWorkGroupSize is unavailable or invalid.\n");
+      return ChangeStatus::UNCHANGED;
+    }
+
+    if (AAFlatWorkGroupSize->isAtInitialState()) {
+      LLVM_DEBUG(dbgs() << '[' << getName()
+                        << "] AAAMDFlatWorkGroupSize is still at initial "
+                           "state. Skip the update.\n");
+      return ChangeStatus::UNCHANGED;
+    }
----------------
arsenm wrote:

The isAtInitialState check is a superset of the above isValidState, just 
replace the isValidState call? 

https://github.com/llvm/llvm-project/pull/114726
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