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
27 using namespace llvm;
28
29 namespace llvm {
30 void initializeLanaiMemAluCombinerPass(PassRegistry &);
31 } // namespace llvm
32
LLVMInitializeLanaiTarget()33 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeLanaiTarget() {
34 // Register the target.
35 RegisterTargetMachine<LanaiTargetMachine> registered_target(
36 getTheLanaiTarget());
37 }
38
computeDataLayout()39 static 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
getEffectiveRelocModel(Optional<Reloc::Model> RM)50 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
51 return RM.getValueOr(Reloc::PIC_);
52 }
53
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)54 LanaiTargetMachine::LanaiTargetMachine(const Target &T, const Triple &TT,
55 StringRef Cpu, StringRef FeatureString,
56 const TargetOptions &Options,
57 Optional<Reloc::Model> RM,
58 Optional<CodeModel::Model> CodeModel,
59 CodeGenOpt::Level OptLevel, bool JIT)
60 : LLVMTargetMachine(T, computeDataLayout(), TT, Cpu, FeatureString, Options,
61 getEffectiveRelocModel(RM),
62 getEffectiveCodeModel(CodeModel, CodeModel::Medium),
63 OptLevel),
64 Subtarget(TT, Cpu, FeatureString, *this, Options, getCodeModel(),
65 OptLevel),
66 TLOF(new LanaiTargetObjectFile()) {
67 initAsmInfo();
68 }
69
70 TargetTransformInfo
getTargetTransformInfo(const Function & F)71 LanaiTargetMachine::getTargetTransformInfo(const Function &F) {
72 return TargetTransformInfo(LanaiTTIImpl(this, F));
73 }
74
75 namespace {
76 // Lanai Code Generator Pass Configuration Options.
77 class LanaiPassConfig : public TargetPassConfig {
78 public:
LanaiPassConfig(LanaiTargetMachine & TM,PassManagerBase * PassManager)79 LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
80 : TargetPassConfig(TM, *PassManager) {}
81
getLanaiTargetMachine() const82 LanaiTargetMachine &getLanaiTargetMachine() const {
83 return getTM<LanaiTargetMachine>();
84 }
85
86 bool addInstSelector() override;
87 void addPreSched2() override;
88 void addPreEmitPass() override;
89 };
90 } // namespace
91
92 TargetPassConfig *
createPassConfig(PassManagerBase & PassManager)93 LanaiTargetMachine::createPassConfig(PassManagerBase &PassManager) {
94 return new LanaiPassConfig(*this, &PassManager);
95 }
96
97 // Install an instruction selector pass.
addInstSelector()98 bool LanaiPassConfig::addInstSelector() {
99 addPass(createLanaiISelDag(getLanaiTargetMachine()));
100 return false;
101 }
102
103 // Implemented by targets that want to run passes immediately before
104 // machine code is emitted.
addPreEmitPass()105 void LanaiPassConfig::addPreEmitPass() {
106 addPass(createLanaiDelaySlotFillerPass(getLanaiTargetMachine()));
107 }
108
109 // Run passes after prolog-epilog insertion and before the second instruction
110 // scheduling pass.
addPreSched2()111 void LanaiPassConfig::addPreSched2() {
112 addPass(createLanaiMemAluCombinerPass());
113 }
114