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 "TargetInfo/MSP430TargetInfo.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" LLVM_EXTERNAL_VISIBILITY 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
computeDataLayout(const Triple & TT,StringRef CPU,const TargetOptions & Options)35 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
36 const TargetOptions &Options) {
37 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
38 }
39
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)40 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
41 StringRef CPU, StringRef FS,
42 const TargetOptions &Options,
43 Optional<Reloc::Model> RM,
44 Optional<CodeModel::Model> CM,
45 CodeGenOpt::Level OL, bool JIT)
46 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
47 Options, getEffectiveRelocModel(RM),
48 getEffectiveCodeModel(CM, CodeModel::Small), OL),
49 TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
50 Subtarget(TT, CPU, FS, *this) {
51 initAsmInfo();
52 }
53
~MSP430TargetMachine()54 MSP430TargetMachine::~MSP430TargetMachine() {}
55
56 namespace {
57 /// MSP430 Code Generator Pass Configuration Options.
58 class MSP430PassConfig : public TargetPassConfig {
59 public:
MSP430PassConfig(MSP430TargetMachine & TM,PassManagerBase & PM)60 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
61 : TargetPassConfig(TM, PM) {}
62
getMSP430TargetMachine() const63 MSP430TargetMachine &getMSP430TargetMachine() const {
64 return getTM<MSP430TargetMachine>();
65 }
66
67 bool addInstSelector() override;
68 void addPreEmitPass() override;
69 };
70 } // namespace
71
createPassConfig(PassManagerBase & PM)72 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
73 return new MSP430PassConfig(*this, PM);
74 }
75
addInstSelector()76 bool MSP430PassConfig::addInstSelector() {
77 // Install an instruction selector.
78 addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
79 return false;
80 }
81
addPreEmitPass()82 void MSP430PassConfig::addPreEmitPass() {
83 // Must run branch selection immediately preceding the asm printer.
84 addPass(createMSP430BranchSelectionPass(), false);
85 }
86