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.
38 extern "C" void LLVMInitializeMipsTarget() { }
40 const TargetAsmInfo *MipsTargetMachine::
41 createTargetAsmInfo() const
43 return new MipsTargetAsmInfo(*this);
46 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
47 // The stack is always 8 byte aligned
48 // On function prologue, the stack is created by decrementing
49 // its pointer. Once decremented, all references are done with positive
50 // offset from the stack/frame pointer, using StackGrowsUp enables
51 // an easier handling.
52 // Using CodeModel::Large enables different CALL behavior.
54 MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle=false):
55 Subtarget(*this, M, FS, isLittle),
56 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
57 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
59 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
62 // Abicall enables PIC by default
63 if (Subtarget.hasABICall())
64 setRelocationModel(Reloc::PIC_);
66 // TODO: create an option to enable long calls, like -mlong-calls,
67 // that would be our CodeModel::Large. It must not work with Abicall.
68 if (getCodeModel() == CodeModel::Default)
69 setCodeModel(CodeModel::Small);
73 MipselTargetMachine(const Module &M, const std::string &FS) :
74 MipsTargetMachine(M, FS, true) {}
76 // return 0 and must specify -march to gen MIPS code.
77 unsigned MipsTargetMachine::
78 getModuleMatchQuality(const Module &M)
80 // We strongly match "mips*-*".
81 std::string TT = M.getTargetTriple();
82 if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
85 if (TT.size() >= 13 && std::string(TT.begin(),
86 TT.begin()+13) == "mipsallegrex-")
92 // return 0 and must specify -march to gen MIPSEL code.
93 unsigned MipselTargetMachine::
94 getModuleMatchQuality(const Module &M)
96 // We strongly match "mips*el-*".
97 std::string TT = M.getTargetTriple();
98 if (TT.size() >= 7 && std::string(TT.begin(), TT.begin()+7) == "mipsel-")
101 if (TT.size() >= 15 && std::string(TT.begin(),
102 TT.begin()+15) == "mipsallegrexel-")
105 if (TT.size() == 3 && std::string(TT.begin(), TT.begin()+3) == "psp")
111 // Install an instruction selector pass using
112 // the ISelDag to gen Mips code.
113 bool MipsTargetMachine::
114 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
116 PM.add(createMipsISelDag(*this));
120 // Implemented by targets that want to run passes immediately before
121 // machine code is emitted. return true if -print-machineinstrs should
122 // print out the code after the passes.
123 bool MipsTargetMachine::
124 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
126 PM.add(createMipsDelaySlotFillerPass(*this));
130 // Implements the AssemblyEmitter for the target. Must return
131 // true if AssemblyEmitter is supported
132 bool MipsTargetMachine::
133 addAssemblyEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
134 bool Verbose, raw_ostream &Out) {
135 // Output assembly language.
136 assert(AsmPrinterCtor && "AsmPrinter was not linked in");
137 PM.add(AsmPrinterCtor(Out, *this, Verbose));