[llvm-mca] Add the RetireStage.
Summary:
This class maintains the same logic as the original RetireControlUnit.
This is just an intermediate patch to make the RCU a Stage. Future patches will remove the dependency on the DispatchStage, and then more properly populate the pre/execute/post Stage interface.
Reviewers: andreadb, RKSimon, courbet
Reviewed By: andreadb, courbet
Subscribers: javed.absar, mgorny, tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D47244
llvm-svn: 333292
diff --git a/llvm/tools/llvm-mca/Backend.h b/llvm/tools/llvm-mca/Backend.h
index 72ae46c..f38902b 100644
--- a/llvm/tools/llvm-mca/Backend.h
+++ b/llvm/tools/llvm-mca/Backend.h
@@ -18,6 +18,9 @@
#include "DispatchStage.h"
#include "FetchStage.h"
#include "InstrBuilder.h"
+#include "RegisterFile.h"
+#include "RetireControlUnit.h"
+#include "RetireStage.h"
#include "Scheduler.h"
namespace mca {
@@ -51,12 +54,17 @@
/// histograms. For example, it tracks how the dispatch group size changes
/// over time.
class Backend {
- /// This is the initial stage of the pipeline.
+ // The following are the simulated hardware components of the backend.
+ RetireControlUnit RCU;
+ RegisterFile PRF;
+
/// TODO: Eventually this will become a list of unique Stage* that this
/// backend pipeline executes.
std::unique_ptr<FetchStage> Fetch;
std::unique_ptr<Scheduler> HWS;
std::unique_ptr<DispatchStage> Dispatch;
+ std::unique_ptr<RetireStage> Retire;
+
std::set<HWEventListener *> Listeners;
unsigned Cycles;
@@ -68,15 +76,16 @@
std::unique_ptr<FetchStage> InitialStage, unsigned DispatchWidth = 0,
unsigned RegisterFileSize = 0, unsigned LoadQueueSize = 0,
unsigned StoreQueueSize = 0, bool AssumeNoAlias = false)
- : Fetch(std::move(InitialStage)),
- HWS(llvm::make_unique<Scheduler>(this, Subtarget.getSchedModel(),
+ : RCU(Subtarget.getSchedModel()),
+ PRF(Subtarget.getSchedModel(), MRI, RegisterFileSize),
+ Fetch(std::move(InitialStage)),
+ HWS(llvm::make_unique<Scheduler>(this, Subtarget.getSchedModel(), RCU,
LoadQueueSize, StoreQueueSize,
AssumeNoAlias)),
Dispatch(llvm::make_unique<DispatchStage>(
- this, Subtarget, MRI, RegisterFileSize, DispatchWidth, HWS.get())),
- Cycles(0) {
- HWS->setDispatchStage(Dispatch.get());
- }
+ this, Subtarget, MRI, RegisterFileSize, DispatchWidth, RCU, PRF,
+ HWS.get())),
+ Retire(llvm::make_unique<RetireStage>(this, RCU, PRF)), Cycles(0) {}
void run();
void addEventListener(HWEventListener *Listener);