[llvm] [MC] Account for AcquireAtCycle in getReciprocalThroughput (PR #132653)

[Simon Pilgrim via llvm-commits]

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@@ -96,19 +96,22 @@ int MCSchedModel::computeInstrLatency(const MCSubtargetInfo &STI,
 double
 MCSchedModel::getReciprocalThroughput(const MCSubtargetInfo &STI,
                                       const MCSchedClassDesc &SCDesc) {
-  std::optional<double> Throughput;
+  std::optional<double> MinThroughput;
   const MCSchedModel &SM = STI.getSchedModel();
   const MCWriteProcResEntry *I = STI.getWriteProcResBegin(&SCDesc);
   const MCWriteProcResEntry *E = STI.getWriteProcResEnd(&SCDesc);
   for (; I != E; ++I) {
-    if (!I->ReleaseAtCycle)
+    if (!I->ReleaseAtCycle || I->ReleaseAtCycle == I->AcquireAtCycle)
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RKSimon wrote:

does `I->ReleaseAtCycle == I->AcquireAtCycle` actually happen?

https://github.com/llvm/llvm-project/pull/132653