[llvm] [llvm-mca][AMDGPU] Retire instructions that have issue carry over correctly (PR #83881)

[Michael Maitland via llvm-commits]

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@@ -257,8 +257,9 @@ llvm::Error InOrderIssueStage::tryIssue(InstRef &IR) {
   }
 
   // If the instruction has a latency of 0, we need to handle
-  // the execution and retirement now.
-  if (IS.isExecuted()) {
+  // the execution and retirement now. If the instruction is issued in multiple
+  // cycles, we cannot retire until it is finished issuing.
+  if (IS.isExecuted() && !ShouldCarryOver) {
     PRF.onInstructionExecuted(&IS);
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michaelmaitland wrote:

Maybe we need to have `onInstructionExecuted` and `notifyEvent` called in `updateCarriedOver` too?

https://github.com/llvm/llvm-project/pull/83881