Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/lib/Target/Lanai/LanaiTargetMachine.cpp

@@ -0,0 +1,120 @@
+//===-- LanaiTargetMachine.cpp - Define TargetMachine for Lanai ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the info about Lanai target spec.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LanaiTargetMachine.h"
+
+#include "Lanai.h"
+#include "LanaiTargetObjectFile.h"
+#include "LanaiTargetTransformInfo.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Target/TargetOptions.h"
+
+using namespace llvm;
+
+namespace llvm {
+void initializeLanaiMemAluCombinerPass(PassRegistry &);
+} // namespace llvm
+
+extern "C" void LLVMInitializeLanaiTarget() {
+  // Register the target.
+  RegisterTargetMachine<LanaiTargetMachine> registered_target(
+      getTheLanaiTarget());
+}
+
+static std::string computeDataLayout() {
+  // Data layout (keep in sync with clang/lib/Basic/Targets.cpp)
+  return "E"        // Big endian
+         "-m:e"     // ELF name manging
+         "-p:32:32" // 32-bit pointers, 32 bit aligned
+         "-i64:64"  // 64 bit integers, 64 bit aligned
+         "-a:0:32"  // 32 bit alignment of objects of aggregate type
+         "-n32"     // 32 bit native integer width
+         "-S64";    // 64 bit natural stack alignment
+}
+
+static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
+  if (!RM.hasValue())
+    return Reloc::PIC_;
+  return *RM;
+}
+
+static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
+  if (CM)
+    return *CM;
+  return CodeModel::Medium;
+}
+
+LanaiTargetMachine::LanaiTargetMachine(const Target &T, const Triple &TT,
+                                       StringRef Cpu, StringRef FeatureString,
+                                       const TargetOptions &Options,
+                                       Optional<Reloc::Model> RM,
+                                       Optional<CodeModel::Model> CodeModel,
+                                       CodeGenOpt::Level OptLevel, bool JIT)
+    : LLVMTargetMachine(T, computeDataLayout(), TT, Cpu, FeatureString, Options,
+                        getEffectiveRelocModel(RM),
+                        getEffectiveCodeModel(CodeModel), OptLevel),
+      Subtarget(TT, Cpu, FeatureString, *this, Options, getCodeModel(),
+                OptLevel),
+      TLOF(new LanaiTargetObjectFile()) {
+  initAsmInfo();
+}
+
+TargetTransformInfo
+LanaiTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(LanaiTTIImpl(this, F));
+}
+
+namespace {
+// Lanai Code Generator Pass Configuration Options.
+class LanaiPassConfig : public TargetPassConfig {
+public:
+  LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
+      : TargetPassConfig(TM, *PassManager) {}
+
+  LanaiTargetMachine &getLanaiTargetMachine() const {
+    return getTM<LanaiTargetMachine>();
+  }
+
+  bool addInstSelector() override;
+  void addPreSched2() override;
+  void addPreEmitPass() override;
+};
+} // namespace
+
+TargetPassConfig *
+LanaiTargetMachine::createPassConfig(PassManagerBase &PassManager) {
+  return new LanaiPassConfig(*this, &PassManager);
+}
+
+// Install an instruction selector pass.
+bool LanaiPassConfig::addInstSelector() {
+  addPass(createLanaiISelDag(getLanaiTargetMachine()));
+  return false;
+}
+
+// Implemented by targets that want to run passes immediately before
+// machine code is emitted.
+void LanaiPassConfig::addPreEmitPass() {
+  addPass(createLanaiDelaySlotFillerPass(getLanaiTargetMachine()));
+}
+
+// Run passes after prolog-epilog insertion and before the second instruction
+// scheduling pass.
+void LanaiPassConfig::addPreSched2() {
+  addPass(createLanaiMemAluCombinerPass());
+}