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 if (!RM.hasValue())
52 return Reloc::PIC_;
53 return *RM;
54 }
55
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)56 LanaiTargetMachine::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
72 TargetTransformInfo
getTargetTransformInfo(const Function & F)73 LanaiTargetMachine::getTargetTransformInfo(const Function &F) {
74 return TargetTransformInfo(LanaiTTIImpl(this, F));
75 }
76
77 namespace {
78 // Lanai Code Generator Pass Configuration Options.
79 class LanaiPassConfig : public TargetPassConfig {
80 public:
LanaiPassConfig(LanaiTargetMachine & TM,PassManagerBase * PassManager)81 LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
82 : TargetPassConfig(TM, *PassManager) {}
83
getLanaiTargetMachine() const84 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
94 TargetPassConfig *
createPassConfig(PassManagerBase & PassManager)95 LanaiTargetMachine::createPassConfig(PassManagerBase &PassManager) {
96 return new LanaiPassConfig(*this, &PassManager);
97 }
98
99 // Install an instruction selector pass.
addInstSelector()100 bool 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.
addPreEmitPass()107 void LanaiPassConfig::addPreEmitPass() {
108 addPass(createLanaiDelaySlotFillerPass(getLanaiTargetMachine()));
109 }
110
111 // Run passes after prolog-epilog insertion and before the second instruction
112 // scheduling pass.
addPreSched2()113 void LanaiPassConfig::addPreSched2() {
114 addPass(createLanaiMemAluCombinerPass());
115 }
116