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/TargetRegistry.h"
21#include "llvm/Support/Compiler.h"
22#include <optional>
23using namespace llvm;
24
25extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeMSP430Target() {
26 // Register the target.
27 RegisterTargetMachine<MSP430TargetMachine> X(getTheMSP430Target());
28 PassRegistry &PR = *PassRegistry::getPassRegistry();
29 initializeMSP430AsmPrinterPass(PR);
30 initializeMSP430DAGToDAGISelLegacyPass(PR);
31}
32
33static Reloc::Model getEffectiveRelocModel(std::optional<Reloc::Model> RM) {
34 return RM.value_or(u: Reloc::Static);
35}
36
37MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
38 StringRef CPU, StringRef FS,
39 const TargetOptions &Options,
40 std::optional<Reloc::Model> RM,
41 std::optional<CodeModel::Model> CM,
42 CodeGenOptLevel OL, bool JIT)
43 : CodeGenTargetMachineImpl(T, TT.computeDataLayout(), TT, CPU, FS, Options,
44 getEffectiveRelocModel(RM),
45 getEffectiveCodeModel(CM, Default: CodeModel::Small), OL),
46 TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
47 Subtarget(TT, std::string(CPU), std::string(FS), *this) {
48 initAsmInfo();
49}
50
51MSP430TargetMachine::~MSP430TargetMachine() = default;
52
53namespace {
54/// MSP430 Code Generator Pass Configuration Options.
55class MSP430PassConfig : public TargetPassConfig {
56public:
57 MSP430PassConfig(MSP430TargetMachine &TM, PassManagerBase &PM)
58 : TargetPassConfig(TM, PM) {}
59
60 MSP430TargetMachine &getMSP430TargetMachine() const {
61 return getTM<MSP430TargetMachine>();
62 }
63
64 void addIRPasses() override;
65 bool addInstSelector() override;
66 void addPreEmitPass() override;
67};
68} // namespace
69
70TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
71 return new MSP430PassConfig(*this, PM);
72}
73
74MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(
75 BumpPtrAllocator &Allocator, const Function &F,
76 const TargetSubtargetInfo *STI) const {
77 return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,
78 F, STI);
79}
80
81void MSP430PassConfig::addIRPasses() {
82 addPass(P: createAtomicExpandLegacyPass());
83
84 TargetPassConfig::addIRPasses();
85}
86
87bool MSP430PassConfig::addInstSelector() {
88 // Install an instruction selector.
89 addPass(P: createMSP430ISelDag(TM&: getMSP430TargetMachine(), OptLevel: getOptLevel()));
90 return false;
91}
92
93void MSP430PassConfig::addPreEmitPass() {
94 // Must run branch selection immediately preceding the asm printer.
95 addPass(P: createMSP430BranchSelectionPass());
96}
97