1 files changed, 98 insertions, 0 deletions

diff --git a/contrib/llvm-project/llvm/lib/CodeGen/MachineOptimizationRemarkEmitter.cpp b/contrib/llvm-project/llvm/lib/CodeGen/MachineOptimizationRemarkEmitter.cpp
new file mode 100644
index 000000000000..27db9106b337
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/CodeGen/MachineOptimizationRemarkEmitter.cpp
@@ -0,0 +1,98 @@
+///===- MachineOptimizationRemarkEmitter.cpp - Opt Diagnostic -*- 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
+/// Optimization diagnostic interfaces for machine passes.  It's packaged as an
+/// analysis pass so that by using this service passes become dependent on MBFI
+/// as well.  MBFI is used to compute the "hotness" of the diagnostic message.
+///
+///===---------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
+#include "llvm/CodeGen/LazyMachineBlockFrequencyInfo.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/LLVMContext.h"
+
+using namespace llvm;
+
+DiagnosticInfoMIROptimization::MachineArgument::MachineArgument(
+    StringRef MKey, const MachineInstr &MI)
+    : Argument() {
+  Key = MKey;
+
+  raw_string_ostream OS(Val);
+  MI.print(OS, /*IsStandalone=*/true, /*SkipOpers=*/false,
+           /*SkipDebugLoc=*/true);
+}
+
+Optional<uint64_t>
+MachineOptimizationRemarkEmitter::computeHotness(const MachineBasicBlock &MBB) {
+  if (!MBFI)
+    return None;
+
+  return MBFI->getBlockProfileCount(&MBB);
+}
+
+void MachineOptimizationRemarkEmitter::computeHotness(
+    DiagnosticInfoMIROptimization &Remark) {
+  const MachineBasicBlock *MBB = Remark.getBlock();
+  if (MBB)
+    Remark.setHotness(computeHotness(*MBB));
+}
+
+void MachineOptimizationRemarkEmitter::emit(
+    DiagnosticInfoOptimizationBase &OptDiagCommon) {
+  auto &OptDiag = cast<DiagnosticInfoMIROptimization>(OptDiagCommon);
+  computeHotness(OptDiag);
+
+  LLVMContext &Ctx = MF.getFunction().getContext();
+
+  // Only emit it if its hotness meets the threshold.
+  if (OptDiag.getHotness().getValueOr(0) <
+      Ctx.getDiagnosticsHotnessThreshold()) {
+    return;
+  }
+
+  Ctx.diagnose(OptDiag);
+}
+
+MachineOptimizationRemarkEmitterPass::MachineOptimizationRemarkEmitterPass()
+    : MachineFunctionPass(ID) {
+  initializeMachineOptimizationRemarkEmitterPassPass(
+      *PassRegistry::getPassRegistry());
+}
+
+bool MachineOptimizationRemarkEmitterPass::runOnMachineFunction(
+    MachineFunction &MF) {
+  MachineBlockFrequencyInfo *MBFI;
+
+  if (MF.getFunction().getContext().getDiagnosticsHotnessRequested())
+    MBFI = &getAnalysis<LazyMachineBlockFrequencyInfoPass>().getBFI();
+  else
+    MBFI = nullptr;
+
+  ORE = llvm::make_unique<MachineOptimizationRemarkEmitter>(MF, MBFI);
+  return false;
+}
+
+void MachineOptimizationRemarkEmitterPass::getAnalysisUsage(
+    AnalysisUsage &AU) const {
+  AU.addRequired<LazyMachineBlockFrequencyInfoPass>();
+  AU.setPreservesAll();
+  MachineFunctionPass::getAnalysisUsage(AU);
+}
+
+char MachineOptimizationRemarkEmitterPass::ID = 0;
+static const char ore_name[] = "Machine Optimization Remark Emitter";
+#define ORE_NAME "machine-opt-remark-emitter"
+
+INITIALIZE_PASS_BEGIN(MachineOptimizationRemarkEmitterPass, ORE_NAME, ore_name,
+                      false, true)
+INITIALIZE_PASS_DEPENDENCY(LazyMachineBlockFrequencyInfoPass)
+INITIALIZE_PASS_END(MachineOptimizationRemarkEmitterPass, ORE_NAME, ore_name,
+                    false, true)