1 //===-- MipsTargetMachine.cpp - Define TargetMachine for Mips -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Implements the info about Mips target spec.
12 //===----------------------------------------------------------------------===//
15 #include "MipsTargetAsmInfo.h"
16 #include "MipsTargetMachine.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/Target/TargetMachineRegistry.h"
22 /// MipsTargetMachineModule - Note that this is used on hosts that
23 /// cannot link in a library unless there are references into the
24 /// library. In particular, it seems that it is not possible to get
25 /// things to work on Win32 without this. Though it is unused, do not
27 extern "C" int MipsTargetMachineModule;
28 int MipsTargetMachineModule = 0;
30 // Register the target.
31 static RegisterTarget<MipsTargetMachine> X("mips", "Mips");
32 static RegisterTarget<MipselTargetMachine> Y("mipsel", "Mipsel");
34 MipsTargetMachine::AsmPrinterCtorFn MipsTargetMachine::AsmPrinterCtor = 0;
37 // Force static initialization when called from llvm/InitializeAllTargets.h
39 void InitializeMipsTarget() { }
42 const TargetAsmInfo *MipsTargetMachine::
43 createTargetAsmInfo() const
45 return new MipsTargetAsmInfo(*this);
48 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
49 // The stack is always 8 byte aligned
50 // On function prologue, the stack is created by decrementing
51 // its pointer. Once decremented, all references are done with positive
52 // offset from the stack/frame pointer, using StackGrowsUp enables
53 // an easier handling.
54 // Using CodeModel::Large enables different CALL behavior.
56 MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle=false):
57 Subtarget(*this, M, FS, isLittle),
58 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
59 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
61 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
64 // Abicall enables PIC by default
65 if (Subtarget.hasABICall())
66 setRelocationModel(Reloc::PIC_);
68 // TODO: create an option to enable long calls, like -mlong-calls,
69 // that would be our CodeModel::Large. It must not work with Abicall.
70 if (getCodeModel() == CodeModel::Default)
71 setCodeModel(CodeModel::Small);
75 MipselTargetMachine(const Module &M, const std::string &FS) :
76 MipsTargetMachine(M, FS, true) {}
78 // return 0 and must specify -march to gen MIPS code.
79 unsigned MipsTargetMachine::
80 getModuleMatchQuality(const Module &M)
82 // We strongly match "mips*-*".
83 std::string TT = M.getTargetTriple();
84 if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
87 if (TT.size() >= 13 && std::string(TT.begin(),
88 TT.begin()+13) == "mipsallegrex-")
94 // return 0 and must specify -march to gen MIPSEL code.
95 unsigned MipselTargetMachine::
96 getModuleMatchQuality(const Module &M)
98 // We strongly match "mips*el-*".
99 std::string TT = M.getTargetTriple();
100 if (TT.size() >= 7 && std::string(TT.begin(), TT.begin()+7) == "mipsel-")
103 if (TT.size() >= 15 && std::string(TT.begin(),
104 TT.begin()+15) == "mipsallegrexel-")
107 if (TT.size() == 3 && std::string(TT.begin(), TT.begin()+3) == "psp")
113 // Install an instruction selector pass using
114 // the ISelDag to gen Mips code.
115 bool MipsTargetMachine::
116 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
118 PM.add(createMipsISelDag(*this));
122 // Implemented by targets that want to run passes immediately before
123 // machine code is emitted. return true if -print-machineinstrs should
124 // print out the code after the passes.
125 bool MipsTargetMachine::
126 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
128 PM.add(createMipsDelaySlotFillerPass(*this));
132 // Implements the AssemblyEmitter for the target. Must return
133 // true if AssemblyEmitter is supported
134 bool MipsTargetMachine::
135 addAssemblyEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
136 bool Verbose, raw_ostream &Out) {
137 // Output assembly language.
138 assert(AsmPrinterCtor && "AsmPrinter was not linked in");
139 PM.add(AsmPrinterCtor(Out, *this, OptLevel, Verbose));