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/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 
24 extern "C" void LLVMInitializeMSP430Target() {
25   // Register the target.
26   RegisterTargetMachine<MSP430TargetMachine> X(TheMSP430Target);
27 }
28 
29 MSP430TargetMachine::MSP430TargetMachine(const Target &T, const Triple &TT,
30                                          StringRef CPU, StringRef FS,
31                                          const TargetOptions &Options,
32                                          Reloc::Model RM, CodeModel::Model CM,
33                                          CodeGenOpt::Level OL)
34     : LLVMTargetMachine(T, "e-m:e-p:16:16-i32:16:32-a:16-n8:16", TT, CPU, FS,
35                         Options, RM, CM, OL),
36       TLOF(make_unique<TargetLoweringObjectFileELF>()),
37       // FIXME: Check DataLayout string.
38       Subtarget(TT, CPU, FS, *this) {
39   initAsmInfo();
40 }
41 
42 MSP430TargetMachine::~MSP430TargetMachine() {}
43 
44 namespace {
45 /// MSP430 Code Generator Pass Configuration Options.
46 class MSP430PassConfig : public TargetPassConfig {
47 public:
48   MSP430PassConfig(MSP430TargetMachine *TM, PassManagerBase &PM)
49     : TargetPassConfig(TM, PM) {}
50 
51   MSP430TargetMachine &getMSP430TargetMachine() const {
52     return getTM<MSP430TargetMachine>();
53   }
54 
55   bool addInstSelector() override;
56   void addPreEmitPass() override;
57 };
58 } // namespace
59 
60 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
61   return new MSP430PassConfig(this, PM);
62 }
63 
64 bool MSP430PassConfig::addInstSelector() {
65   // Install an instruction selector.
66   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
67   return false;
68 }
69 
70 void MSP430PassConfig::addPreEmitPass() {
71   // Must run branch selection immediately preceding the asm printer.
72   addPass(createMSP430BranchSelectionPass(), false);
73 }
74