[clang] [llvm] [PGO] Implement PGO counter promotion for atomic updates (PR #202487)

[David Li via cfe-commits]

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@@ -1215,7 +1280,7 @@ void InstrLowerer::lowerIncrement(InstrProfIncrementInst *Inc) {
     Value *StepI64 =
         Builder.CreateZExtOrTrunc(Inc->getStep(), Int64Ty, "step.i64");
     Builder.CreateCall(Callee, {CastAddr, Uniform, StepI64});
-  } else if (Options.Atomic || AtomicCounterUpdateAll ||
+  } else if ((!isCounterPromotionEnabled() && isAtomic()) ||
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david-xl wrote:

Add a comment "Delay atomic operation creation until after promotion".

https://github.com/llvm/llvm-project/pull/202487