1//===-- LanaiTargetMachine.cpp - Define TargetMachine for Lanai ---------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Implements the info about Lanai target spec.
10//
11//===----------------------------------------------------------------------===//
12
13#include "LanaiTargetMachine.h"
14
15#include "Lanai.h"
16#include "LanaiTargetObjectFile.h"
17#include "LanaiTargetTransformInfo.h"
18#include "TargetInfo/LanaiTargetInfo.h"
19#include "llvm/Analysis/TargetTransformInfo.h"
20#include "llvm/CodeGen/Passes.h"
21#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
22#include "llvm/CodeGen/TargetPassConfig.h"
23#include "llvm/Support/FormattedStream.h"
24#include "llvm/Support/TargetRegistry.h"
25#include "llvm/Target/TargetOptions.h"
26
27using namespace llvm;
28
29namespace llvm {
30void initializeLanaiMemAluCombinerPass(PassRegistry &);
31} // namespace llvm
32
33extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeLanaiTarget() {
34  // Register the target.
35  RegisterTargetMachine<LanaiTargetMachine> registered_target(
36      getTheLanaiTarget());
37}
38
39static std::string computeDataLayout() {
40  // Data layout (keep in sync with clang/lib/Basic/Targets.cpp)
41  return "E"        // Big endian
42         "-m:e"     // ELF name manging
43         "-p:32:32" // 32-bit pointers, 32 bit aligned
44         "-i64:64"  // 64 bit integers, 64 bit aligned
45         "-a:0:32"  // 32 bit alignment of objects of aggregate type
46         "-n32"     // 32 bit native integer width
47         "-S64";    // 64 bit natural stack alignment
48}
49
50static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
51  if (!RM.hasValue())
52    return Reloc::PIC_;
53  return *RM;
54}
55
56LanaiTargetMachine::LanaiTargetMachine(const Target &T, const Triple &TT,
57                                       StringRef Cpu, StringRef FeatureString,
58                                       const TargetOptions &Options,
59                                       Optional<Reloc::Model> RM,
60                                       Optional<CodeModel::Model> CodeModel,
61                                       CodeGenOpt::Level OptLevel, bool JIT)
62    : LLVMTargetMachine(T, computeDataLayout(), TT, Cpu, FeatureString, Options,
63                        getEffectiveRelocModel(RM),
64                        getEffectiveCodeModel(CodeModel, CodeModel::Medium),
65                        OptLevel),
66      Subtarget(TT, Cpu, FeatureString, *this, Options, getCodeModel(),
67                OptLevel),
68      TLOF(new LanaiTargetObjectFile()) {
69  initAsmInfo();
70}
71
72TargetTransformInfo
73LanaiTargetMachine::getTargetTransformInfo(const Function &F) {
74  return TargetTransformInfo(LanaiTTIImpl(this, F));
75}
76
77namespace {
78// Lanai Code Generator Pass Configuration Options.
79class LanaiPassConfig : public TargetPassConfig {
80public:
81  LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
82      : TargetPassConfig(TM, *PassManager) {}
83
84  LanaiTargetMachine &getLanaiTargetMachine() const {
85    return getTM<LanaiTargetMachine>();
86  }
87
88  bool addInstSelector() override;
89  void addPreSched2() override;
90  void addPreEmitPass() override;
91};
92} // namespace
93
94TargetPassConfig *
95LanaiTargetMachine::createPassConfig(PassManagerBase &PassManager) {
96  return new LanaiPassConfig(*this, &PassManager);
97}
98
99// Install an instruction selector pass.
100bool LanaiPassConfig::addInstSelector() {
101  addPass(createLanaiISelDag(getLanaiTargetMachine()));
102  return false;
103}
104
105// Implemented by targets that want to run passes immediately before
106// machine code is emitted.
107void LanaiPassConfig::addPreEmitPass() {
108  addPass(createLanaiDelaySlotFillerPass(getLanaiTargetMachine()));
109}
110
111// Run passes after prolog-epilog insertion and before the second instruction
112// scheduling pass.
113void LanaiPassConfig::addPreSched2() {
114  addPass(createLanaiMemAluCombinerPass());
115}
116