[llvm] 3b3c013 - [MCA] Fixing bug that was causing LSUnit not to realize an instruction finished executing when the instruction has 0 latency.

[Patrick Holland via llvm-commits]

Author: Patrick Holland
Date: 2021-08-20T10:32:37-07:00
New Revision: 3b3c01348be0a78c465dec96d80b55f4d5658fd1

URL: https://github.com/llvm/llvm-project/commit/3b3c01348be0a78c465dec96d80b55f4d5658fd1
DIFF: https://github.com/llvm/llvm-project/commit/3b3c01348be0a78c465dec96d80b55f4d5658fd1.diff

LOG: [MCA] Fixing bug that was causing LSUnit not to realize an instruction finished executing when the instruction has 0 latency.

Differential Revision: https://reviews.llvm.org/D108443

Added: 
    

Modified: 
    llvm/lib/MCA/Stages/InOrderIssueStage.cpp

Removed: 
    


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diff  --git a/llvm/lib/MCA/Stages/InOrderIssueStage.cpp b/llvm/lib/MCA/Stages/InOrderIssueStage.cpp
index 0b71f7d10a62..fa5c0fc66b9e 100644
--- a/llvm/lib/MCA/Stages/InOrderIssueStage.cpp
+++ b/llvm/lib/MCA/Stages/InOrderIssueStage.cpp
@@ -261,6 +261,7 @@ llvm::Error InOrderIssueStage::tryIssue(InstRef &IR) {
   // the execution and retirement now.
   if (IS.isExecuted()) {
     PRF.onInstructionExecuted(&IS);
+    LSU.onInstructionExecuted(IR);
     notifyEvent<HWInstructionEvent>(
         HWInstructionEvent(HWInstructionEvent::Executed, IR));
     LLVM_DEBUG(dbgs() << "[E] Instruction #" << IR << " is executed\n");