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 "MSP430.h"
15 #include "MSP430TargetAsmInfo.h"
16 #include "MSP430TargetMachine.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/CodeGen/Passes.h"
20 #include "llvm/Target/TargetAsmInfo.h"
21 #include "llvm/Target/TargetMachineRegistry.h"
22 
23 using namespace llvm;
24 
25 /// MSP430TargetMachineModule - Note that this is used on hosts that
26 /// cannot link in a library unless there are references into the
27 /// library.  In particular, it seems that it is not possible to get
28 /// things to work on Win32 without this.  Though it is unused, do not
29 /// remove it.
30 extern "C" int MSP430TargetMachineModule;
31 int MSP430TargetMachineModule = 0;
32 
33 
34 // Register the targets
35 static RegisterTarget<MSP430TargetMachine>
36 X("msp430", "MSP430 [experimental]");
37 
38 // Force static initialization.
39 extern "C" void LLVMInitializeMSP430Target() { }
40 
41 MSP430TargetMachine::MSP430TargetMachine(const Module &M,
42                                          const std::string &FS) :
43   Subtarget(*this, M, FS),
44   // FIXME: Check TargetData string.
45   DataLayout("e-p:16:8:8-i8:8:8-i16:8:8-i32:8:8"),
46   InstrInfo(*this), TLInfo(*this),
47   FrameInfo(TargetFrameInfo::StackGrowsDown, 2, -2) { }
48 
49 const TargetAsmInfo *MSP430TargetMachine::createTargetAsmInfo() const {
50   return new MSP430TargetAsmInfo(*this);
51 }
52 
53 bool MSP430TargetMachine::addInstSelector(PassManagerBase &PM,
54                                           CodeGenOpt::Level OptLevel) {
55   // Install an instruction selector.
56   PM.add(createMSP430ISelDag(*this, OptLevel));
57   return false;
58 }
59 
60 bool MSP430TargetMachine::addAssemblyEmitter(PassManagerBase &PM,
61                                              CodeGenOpt::Level OptLevel,
62                                              bool Verbose,
63                                              raw_ostream &Out) {
64   // Output assembly language.
65   PM.add(createMSP430CodePrinterPass(Out, *this, Verbose));
66   return false;
67 }
68 
69 unsigned MSP430TargetMachine::getModuleMatchQuality(const Module &M) {
70   std::string TT = M.getTargetTriple();
71 
72   // We strongly match msp430
73   if (TT.size() >= 6 && TT[0] == 'm' && TT[1] == 's' && TT[2] == 'p' &&
74       TT[3] == '4' &&  TT[4] == '3' && TT[5] == '0')
75     return 20;
76 
77   return 0;
78 }
79 
80