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/IR/LegacyPassManager.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/Support/TargetRegistry.h"
21 using namespace llvm;
22 
23 extern "C" void LLVMInitializeMSP430Target() {
24   // Register the target.
25   RegisterTargetMachine<MSP430TargetMachine> X(TheMSP430Target);
26 }
27 
28 MSP430TargetMachine::MSP430TargetMachine(const Target &T, StringRef TT,
29                                          StringRef CPU, StringRef FS,
30                                          const TargetOptions &Options,
31                                          Reloc::Model RM, CodeModel::Model CM,
32                                          CodeGenOpt::Level OL)
33     : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
34       TLOF(make_unique<TargetLoweringObjectFileELF>()),
35       // FIXME: Check DataLayout string.
36       DL("e-m:e-p:16:16-i32:16:32-a:16-n8:16"), Subtarget(TT, CPU, FS, *this) {
37   initAsmInfo();
38 }
39 
40 MSP430TargetMachine::~MSP430TargetMachine() {}
41 
42 namespace {
43 /// MSP430 Code Generator Pass Configuration Options.
44 class MSP430PassConfig : public TargetPassConfig {
45 public:
46   MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM)
47     : TargetPassConfig(TM, PM) {}
48 
49   MSP430TargetMachine &getMSP430TargetMachine() const {
50     return getTM<MSP430TargetMachine>();
51   }
52 
53   bool addInstSelector() override;
54   void addPreEmitPass() override;
55 };
56 } // namespace
57 
58 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
59   return new MSP430PassConfig(this, PM);
60 }
61 
62 bool MSP430PassConfig::addInstSelector() {
63   // Install an instruction selector.
64   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
65   return false;
66 }
67 
68 void MSP430PassConfig::addPreEmitPass() {
69   // Must run branch selection immediately preceding the asm printer.
70   addPass(createMSP430BranchSelectionPass(), false);
71 }
72