1 files changed, 94 insertions, 0 deletions
diff --git a/llvm/tools/llvm-mca/Views/SummaryView.cpp b/llvm/tools/llvm-mca/Views/SummaryView.cpp
new file mode 100644
index 000000000000..ef5550048f4c
--- /dev/null
+++ b/llvm/tools/llvm-mca/Views/SummaryView.cpp
@@ -0,0 +1,94 @@
+//===--------------------- SummaryView.cpp -------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+/// \file
+///
+/// This file implements the functionalities used by the SummaryView to print
+/// the report information.
+///
+//===----------------------------------------------------------------------===//
+
+#include "Views/SummaryView.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/MCA/Support.h"
+#include "llvm/Support/Format.h"
+
+namespace llvm {
+namespace mca {
+
+#define DEBUG_TYPE "llvm-mca"
+
+SummaryView::SummaryView(const MCSchedModel &Model, ArrayRef<MCInst> S,
+                         unsigned Width)
+    : SM(Model), Source(S), DispatchWidth(Width?Width: Model.IssueWidth),
+      LastInstructionIdx(0),
+      TotalCycles(0), NumMicroOps(0),
+      ProcResourceUsage(Model.getNumProcResourceKinds(), 0),
+      ProcResourceMasks(Model.getNumProcResourceKinds()),
+      ResIdx2ProcResID(Model.getNumProcResourceKinds(), 0) {
+  computeProcResourceMasks(SM, ProcResourceMasks);
+  for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
+    unsigned Index = getResourceStateIndex(ProcResourceMasks[I]);
+    ResIdx2ProcResID[Index] = I;
+  }
+}
+
+void SummaryView::onEvent(const HWInstructionEvent &Event) {
+  if (Event.Type == HWInstructionEvent::Dispatched)
+    LastInstructionIdx = Event.IR.getSourceIndex();
+
+  // We are only interested in the "instruction retired" events generated by
+  // the retire stage for instructions that are part of iteration #0.
+  if (Event.Type != HWInstructionEvent::Retired ||
+      Event.IR.getSourceIndex() >= Source.size())
+    return;
+
+  // Update the cumulative number of resource cycles based on the processor
+  // resource usage information available from the instruction descriptor. We
+  // need to compute the cumulative number of resource cycles for every
+  // processor resource which is consumed by an instruction of the block.
+  const Instruction &Inst = *Event.IR.getInstruction();
+  const InstrDesc &Desc = Inst.getDesc();
+  NumMicroOps += Desc.NumMicroOps;
+  for (const std::pair<uint64_t, const ResourceUsage> &RU : Desc.Resources) {
+    if (RU.second.size()) {
+      unsigned ProcResID = ResIdx2ProcResID[getResourceStateIndex(RU.first)];
+      ProcResourceUsage[ProcResID] += RU.second.size();
+    }
+  }
+}
+
+void SummaryView::printView(raw_ostream &OS) const {
+  unsigned Instructions = Source.size();
+  unsigned Iterations = (LastInstructionIdx / Instructions) + 1;
+  unsigned TotalInstructions = Instructions * Iterations;
+  unsigned TotalUOps = NumMicroOps * Iterations;
+  double IPC = (double)TotalInstructions / TotalCycles;
+  double UOpsPerCycle = (double)TotalUOps / TotalCycles;
+  double BlockRThroughput = computeBlockRThroughput(
+      SM, DispatchWidth, NumMicroOps, ProcResourceUsage);
+
+  std::string Buffer;
+  raw_string_ostream TempStream(Buffer);
+  TempStream << "Iterations:        " << Iterations;
+  TempStream << "\nInstructions:      " << TotalInstructions;
+  TempStream << "\nTotal Cycles:      " << TotalCycles;
+  TempStream << "\nTotal uOps:        " << TotalUOps << '\n';
+  TempStream << "\nDispatch Width:    " << DispatchWidth;
+  TempStream << "\nuOps Per Cycle:    "
+             << format("%.2f", floor((UOpsPerCycle * 100) + 0.5) / 100);
+  TempStream << "\nIPC:               "
+             << format("%.2f", floor((IPC * 100) + 0.5) / 100);
+  TempStream << "\nBlock RThroughput: "
+             << format("%.1f", floor((BlockRThroughput * 10) + 0.5) / 10)
+             << '\n';
+  TempStream.flush();
+  OS << Buffer;
+}
+
+} // namespace mca.
+} // namespace llvm