1 //===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Top-level implementation for the MSP430 target.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "MSP430TargetMachine.h"
15 #include "MSP430.h"
16 #include "llvm/CodeGen/Passes.h"
17 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
18 #include "llvm/CodeGen/TargetPassConfig.h"
19 #include "llvm/IR/LegacyPassManager.h"
20 #include "llvm/MC/MCAsmInfo.h"
21 #include "llvm/Support/TargetRegistry.h"
22 using namespace llvm;
23
LLVMInitializeMSP430Target()24 extern "C" void LLVMInitializeMSP430Target() {
25 // Register the target.
26 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
27 }
28
getEffectiveRelocModel(Optional<Reloc::Model> RM)29 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
30 if (!RM.hasValue())
31 return Reloc::Static;
32 return *RM;
33 }
34
getEffectiveCodeModel(Optional<CodeModel::Model> CM)35 static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
36 if (CM)
37 return *CM;
38 return CodeModel::Small;
39 }
40
computeDataLayout(const Triple & TT,StringRef CPU,const TargetOptions & Options)41 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
42 const TargetOptions &Options) {
43 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
44 }
45
MSP430TargetMachine(const Target & T,const Triple & TT,StringRef CPU,StringRef FS,const TargetOptions & Options,Optional<Reloc::Model> RM,Optional<CodeModel::Model> CM,CodeGenOpt::Level OL,bool JIT)46 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
47 StringRef CPU, StringRef FS,
48 const TargetOptions &Options,
49 Optional<Reloc::Model> RM,
50 Optional<CodeModel::Model> CM,
51 CodeGenOpt::Level OL, bool JIT)
52 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
53 Options, getEffectiveRelocModel(RM),
54 getEffectiveCodeModel(CM), OL),
55 TLOF(make_unique<TargetLoweringObjectFileELF>()),
56 Subtarget(TT, CPU, FS, *this) {
57 initAsmInfo();
58 }
59
~MSP430TargetMachine()60 MSP430TargetMachine::~MSP430TargetMachine() {}
61
62 namespace {
63 /// MSP430 Code Generator Pass Configuration Options.
64 class MSP430PassConfig : public TargetPassConfig {
65 public:
MSP430PassConfig(MSP430TargetMachine & TM,PassManagerBase & PM)66 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
67 : TargetPassConfig(TM, PM) {}
68
getMSP430TargetMachine() const69 MSP430TargetMachine &getMSP430TargetMachine() const {
70 return getTM<MSP430TargetMachine>();
71 }
72
73 bool addInstSelector() override;
74 void addPreEmitPass() override;
75 };
76 } // namespace
77
createPassConfig(PassManagerBase & PM)78 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
79 return new MSP430PassConfig(*this, PM);
80 }
81
addInstSelector()82 bool MSP430PassConfig::addInstSelector() {
83 // Install an instruction selector.
84 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
85 return false;
86 }
87
addPreEmitPass()88 void MSP430PassConfig::addPreEmitPass() {
89 // Must run branch selection immediately preceding the asm printer.
90 addPass(createMSP430BranchSelectionPass(), false);
91 }
92