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/MC/MCAsmInfo.h"
21#include "llvm/MC/TargetRegistry.h"
22#include <optional>
23using namespace llvm;
24
25extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
26 // Register the target.
27 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
28 PassRegistry &PR = *PassRegistry::getPassRegistry();
29 initializeMSP430DAGToDAGISelLegacyPass(PR);
30}
31
32static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
33 return RM.value_or(u: Reloc::Static);
34}
35
36static std::string computeDataLayout(const Triple &TT, StringRef CPU,
37 const TargetOptions &Options) {
38 return "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16";
39}
40
41MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
42 StringRef CPU, StringRef FS,
43 const TargetOptions &Options,
44 std::optional<Reloc::Model> RM,
45 std::optional<CodeModel::Model> CM,
46 CodeGenOptLevel OL, bool JIT)
47 : LLVMTargetMachine(T, computeDataLayout(TT, CPU, Options), TT, CPU, FS,
48 Options, getEffectiveRelocModel(RM),
49 getEffectiveCodeModel(CM, Default: CodeModel::Small), OL),
50 TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
51 Subtarget(TT, std::string(CPU), std::string(FS), *this) {
52 initAsmInfo();
53}
54
55MSP430TargetMachine::~MSP430TargetMachine() = default;
56
57namespace {
58/// MSP430 Code Generator Pass Configuration Options.
59class MSP430PassConfig : public TargetPassConfig {
60public:
61 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
62 : TargetPassConfig(TM, PM) {}
63
64 MSP430TargetMachine &getMSP430TargetMachine() const {
65 return getTM<MSP430TargetMachine>();
66 }
67
68 void addIRPasses() override;
69 bool addInstSelector() override;
70 void addPreEmitPass() override;
71};
72} // namespace
73
74TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
75 return new MSP430PassConfig(*this, PM);
76}
77
78MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(
79 BumpPtrAllocator &Allocator, const Function &F,
80 const TargetSubtargetInfo *STI) const {
81 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,
82 F, STI);
83}
84
85void MSP430PassConfig::addIRPasses() {
86 addPass(P: createAtomicExpandLegacyPass());
87
88 TargetPassConfig::addIRPasses();
89}
90
91bool MSP430PassConfig::addInstSelector() {
92 // Install an instruction selector.
93 addPass(P: createMSP430ISelDag(TM&: getMSP430TargetMachine(), OptLevel: getOptLevel()));
94 return false;
95}
96
97void MSP430PassConfig::addPreEmitPass() {
98 // Must run branch selection immediately preceding the asm printer.
99 addPass(P: createMSP430BranchSelectionPass());
100}
101