1 files changed, 4 insertions, 49 deletions

diff --git a/llvm/tools/llvm-mca/BackendStatistics.h b/llvm/tools/llvm-mca/BackendStatistics.h
index 29fd43eb2c5..24b8e5c565b 100644
--- a/llvm/tools/llvm-mca/BackendStatistics.h
+++ b/llvm/tools/llvm-mca/BackendStatistics.h
@@ -8,18 +8,12 @@
 //===----------------------------------------------------------------------===//
 /// \file
 ///
-/// This file implements a printer class for printing generic Backend
-/// statistics related to the scheduler and retire unit.
+/// This file implements a View named BackendStatistics that knows how to
+/// collect and print a few statistics related to the retire unit.
 ///
 /// Example:
 /// ========
 ///
-/// Schedulers - number of cycles where we saw N instructions issued:
-/// [# issued], [# cycles]
-///  0,          7  (5.4%)
-///  1,          4  (3.1%)
-///  2,          8  (6.2%)
-///
 /// Retire Control Unit - number of cycles where we saw N instructions retired:
 /// [# retired], [# cycles]
 ///  0,           9  (6.9%)
@@ -27,11 +21,6 @@
 ///  2,           1  (0.8%)
 ///  4,           3  (2.3%)
 ///
-/// Scheduler's queue usage:
-/// JALU01,  0/20
-/// JFPU01,  18/18
-/// JLSAGU,  0/12
-///
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_TOOLS_LLVM_MCA_BACKENDSTATISTICS_H
@@ -49,43 +38,21 @@ class BackendStatistics : public View {
 
   using Histogram = llvm::DenseMap<unsigned, unsigned>;
   Histogram RetiredPerCycle;
-  Histogram IssuedPerCycle;
 
-  unsigned NumIssued;
   unsigned NumRetired;
   unsigned NumCycles;
 
-  // Tracks the usage of a scheduler's queue.
-  struct BufferUsage {
-    unsigned SlotsInUse;
-    unsigned MaxUsedSlots;
-  };
-
-  // There is a map entry for each buffered resource in the scheduling model.
-  // Every time a buffer is consumed/freed, this view updates the corresponding
-  // entry.
-  llvm::DenseMap<unsigned, BufferUsage> BufferedResources;
-
   void updateHistograms() {
-    IssuedPerCycle[NumIssued]++;
     RetiredPerCycle[NumRetired]++;
-    NumIssued = 0;
     NumRetired = 0;
   }
 
-  void printRetireUnitStatistics(llvm::raw_ostream &OS) const;
-  void printSchedulerStatistics(llvm::raw_ostream &OS) const;
-
   void printRCUStatistics(llvm::raw_ostream &OS, const Histogram &Histogram,
                           unsigned Cycles) const;
-  void printIssuePerCycle(const Histogram &IssuePerCycle,
-                          unsigned TotalCycles) const;
-  void printSchedulerUsage(llvm::raw_ostream &OS,
-                           const llvm::MCSchedModel &SM) const;
 
 public:
   BackendStatistics(const llvm::MCSubtargetInfo &sti)
-      : STI(sti), NumIssued(0), NumRetired(0), NumCycles(0) { }
+      : STI(sti), NumRetired(0), NumCycles(0) {}
 
   void onInstructionEvent(const HWInstructionEvent &Event) override;
 
@@ -93,19 +60,7 @@ public:
 
   void onCycleEnd(unsigned Cycle) override { updateHistograms(); }
 
-  // Increases the number of used scheduler queue slots of every buffered
-  // resource in the Buffers set.
-  void onReservedBuffers(llvm::ArrayRef<unsigned> Buffers) override;
-
-  // Decreases by one the number of used scheduler queue slots of every
-  // buffered resource in the Buffers set.
-  void onReleasedBuffers(llvm::ArrayRef<unsigned> Buffers) override;
-
-  void printView(llvm::raw_ostream &OS) const override {
-    printSchedulerStatistics(OS);
-    printRetireUnitStatistics(OS);
-    printSchedulerUsage(OS, STI.getSchedModel());
-  }
+  void printView(llvm::raw_ostream &OS) const override;
 };
 } // namespace mca