1 //===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
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 // Top-level implementation for the MSP430 target.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "MSP430TargetMachine.h"
14 #include "MSP430.h"
15 #include "MSP430MachineFunctionInfo.h"
16 #include "TargetInfo/MSP430TargetInfo.h"
17 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
19 #include "llvm/CodeGen/TargetPassConfig.h"
20 #include "llvm/IR/LegacyPassManager.h"
21 #include "llvm/MC/MCAsmInfo.h"
22 #include "llvm/MC/TargetRegistry.h"
23 #include <optional>
24 using namespace llvm;
25
LLVMInitializeMSP430Target()26 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
27 // Register the target.
28 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
29 PassRegistry &PR = *PassRegistry::getPassRegistry();
30 initializeMSP430DAGToDAGISelPass(PR);
31 }
32
getEffectiveRelocModel(std::optional<Reloc::Model> RM)33 static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
34 return RM.value_or(Reloc::Static);
35 }
36
computeDataLayout(const Triple & TT,StringRef CPU,const TargetOptions & Options)37 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
38 const TargetOptions &Options) {
39 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
40 }
41
MSP430TargetMachine(const Target & T,const Triple & TT,StringRef CPU,StringRef FS,const TargetOptions & Options,std::optional<Reloc::Model> RM,std::optional<CodeModel::Model> CM,CodeGenOpt::Level OL,bool JIT)42 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
43 StringRef CPU, StringRef FS,
44 const TargetOptions &Options,
45 std::optional<Reloc::Model> RM,
46 std::optional<CodeModel::Model> CM,
47 CodeGenOpt::Level OL, bool JIT)
48 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
49 Options, getEffectiveRelocModel(RM),
50 getEffectiveCodeModel(CM, CodeModel::Small), OL),
51 TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
52 Subtarget(TT, std::string(CPU), std::string(FS), *this) {
53 initAsmInfo();
54 }
55
56 MSP430TargetMachine::~MSP430TargetMachine() = default;
57
58 namespace {
59 /// MSP430 Code Generator Pass Configuration Options.
60 class MSP430PassConfig : public TargetPassConfig {
61 public:
MSP430PassConfig(MSP430TargetMachine & TM,PassManagerBase & PM)62 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
63 : TargetPassConfig(TM, PM) {}
64
getMSP430TargetMachine() const65 MSP430TargetMachine &getMSP430TargetMachine() const {
66 return getTM<MSP430TargetMachine>();
67 }
68
69 bool addInstSelector() override;
70 void addPreEmitPass() override;
71 };
72 } // namespace
73
createPassConfig(PassManagerBase & PM)74 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
75 return new MSP430PassConfig(*this, PM);
76 }
77
createMachineFunctionInfo(BumpPtrAllocator & Allocator,const Function & F,const TargetSubtargetInfo * STI) const78 MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(
79 BumpPtrAllocator &Allocator, const Function &F,
80 const TargetSubtargetInfo *STI) const {
81 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,
82 F, STI);
83 }
84
addInstSelector()85 bool MSP430PassConfig::addInstSelector() {
86 // Install an instruction selector.
87 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
88 return false;
89 }
90
addPreEmitPass()91 void MSP430PassConfig::addPreEmitPass() {
92 // Must run branch selection immediately preceding the asm printer.
93 addPass(createMSP430BranchSelectionPass());
94 }
95