1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/MachineCycleAnalysis.cpp b/contrib/llvm-project/llvm/lib/CodeGen/MachineCycleAnalysis.cpp
new file mode 100644
index 000000000000..42a5e2b7af01
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/CodeGen/MachineCycleAnalysis.cpp
@@ -0,0 +1,113 @@
+//===- MachineCycleAnalysis.cpp - Compute CycleInfo for Machine IR --------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineCycleAnalysis.h"
+#include "llvm/ADT/GenericCycleImpl.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineSSAContext.h"
+#include "llvm/InitializePasses.h"
+
+using namespace llvm;
+
+template class llvm::GenericCycleInfo<llvm::MachineSSAContext>;
+template class llvm::GenericCycle<llvm::MachineSSAContext>;
+
+namespace {
+
+/// Legacy analysis pass which computes a \ref MachineCycleInfo.
+class MachineCycleInfoWrapperPass : public MachineFunctionPass {
+  MachineFunction *F = nullptr;
+  MachineCycleInfo CI;
+
+public:
+  static char ID;
+
+  MachineCycleInfoWrapperPass();
+
+  MachineCycleInfo &getCycleInfo() { return CI; }
+  const MachineCycleInfo &getCycleInfo() const { return CI; }
+
+  bool runOnMachineFunction(MachineFunction &F) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  void releaseMemory() override;
+  void print(raw_ostream &OS, const Module *M = nullptr) const override;
+
+  // TODO: verify analysis
+};
+
+class MachineCycleInfoPrinterPass : public MachineFunctionPass {
+public:
+  static char ID;
+
+  MachineCycleInfoPrinterPass();
+
+  bool runOnMachineFunction(MachineFunction &F) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+};
+
+} // namespace
+
+char MachineCycleInfoWrapperPass::ID = 0;
+
+MachineCycleInfoWrapperPass::MachineCycleInfoWrapperPass()
+    : MachineFunctionPass(ID) {
+  initializeMachineCycleInfoWrapperPassPass(*PassRegistry::getPassRegistry());
+}
+
+INITIALIZE_PASS_BEGIN(MachineCycleInfoWrapperPass, "machine-cycles",
+                      "Machine Cycle Info Analysis", true, true)
+INITIALIZE_PASS_END(MachineCycleInfoWrapperPass, "machine-cycles",
+                    "Machine Cycle Info Analysis", true, true)
+
+void MachineCycleInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+  MachineFunctionPass::getAnalysisUsage(AU);
+}
+
+bool MachineCycleInfoWrapperPass::runOnMachineFunction(MachineFunction &Func) {
+  CI.clear();
+
+  F = &Func;
+  CI.compute(Func);
+  return false;
+}
+
+void MachineCycleInfoWrapperPass::print(raw_ostream &OS, const Module *) const {
+  OS << "MachineCycleInfo for function: " << F->getName() << "\n";
+  CI.print(OS);
+}
+
+void MachineCycleInfoWrapperPass::releaseMemory() {
+  CI.clear();
+  F = nullptr;
+}
+
+char MachineCycleInfoPrinterPass::ID = 0;
+
+MachineCycleInfoPrinterPass::MachineCycleInfoPrinterPass()
+    : MachineFunctionPass(ID) {
+  initializeMachineCycleInfoPrinterPassPass(*PassRegistry::getPassRegistry());
+}
+
+INITIALIZE_PASS_BEGIN(MachineCycleInfoPrinterPass, "print-machine-cycles",
+                      "Print Machine Cycle Info Analysis", true, true)
+INITIALIZE_PASS_DEPENDENCY(MachineCycleInfoWrapperPass)
+INITIALIZE_PASS_END(MachineCycleInfoPrinterPass, "print-machine-cycles",
+                    "Print Machine Cycle Info Analysis", true, true)
+
+void MachineCycleInfoPrinterPass::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.setPreservesAll();
+  AU.addRequired<MachineCycleInfoWrapperPass>();
+  MachineFunctionPass::getAnalysisUsage(AU);
+}
+
+bool MachineCycleInfoPrinterPass::runOnMachineFunction(MachineFunction &F) {
+  auto &CI = getAnalysis<MachineCycleInfoWrapperPass>();
+  CI.print(errs());
+  return false;
+}