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 // Force static initialization when called from llvm/InitializeAllTargets.h
36 void InitializeMipsTarget() { }
39 const TargetAsmInfo *MipsTargetMachine::
40 createTargetAsmInfo() const
42 return new MipsTargetAsmInfo(*this);
45 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
46 // The stack is always 8 byte aligned
47 // On function prologue, the stack is created by decrementing
48 // its pointer. Once decremented, all references are done with positive
49 // offset from the stack/frame pointer, using StackGrowsUp enables
50 // an easier handling.
51 // Using CodeModel::Large enables different CALL behavior.
53 MipsTargetMachine(const Module &M, const std::string &FS, bool isLittle=false):
54 Subtarget(*this, M, FS, isLittle),
55 DataLayout(isLittle ? std::string("e-p:32:32:32-i8:8:32-i16:16:32") :
56 std::string("E-p:32:32:32-i8:8:32-i16:16:32")),
58 FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
61 // Abicall enables PIC by default
62 if (Subtarget.hasABICall())
63 setRelocationModel(Reloc::PIC_);
65 // TODO: create an option to enable long calls, like -mlong-calls,
66 // that would be our CodeModel::Large. It must not work with Abicall.
67 if (getCodeModel() == CodeModel::Default)
68 setCodeModel(CodeModel::Small);
72 MipselTargetMachine(const Module &M, const std::string &FS) :
73 MipsTargetMachine(M, FS, true) {}
75 // return 0 and must specify -march to gen MIPS code.
76 unsigned MipsTargetMachine::
77 getModuleMatchQuality(const Module &M)
79 // We strongly match "mips*-*".
80 std::string TT = M.getTargetTriple();
81 if (TT.size() >= 5 && std::string(TT.begin(), TT.begin()+5) == "mips-")
84 if (TT.size() >= 13 && std::string(TT.begin(),
85 TT.begin()+13) == "mipsallegrex-")
91 // return 0 and must specify -march to gen MIPSEL code.
92 unsigned MipselTargetMachine::
93 getModuleMatchQuality(const Module &M)
95 // We strongly match "mips*el-*".
96 std::string TT = M.getTargetTriple();
97 if (TT.size() >= 7 && std::string(TT.begin(), TT.begin()+7) == "mipsel-")
100 if (TT.size() >= 15 && std::string(TT.begin(),
101 TT.begin()+15) == "mipsallegrexel-")
104 if (TT.size() == 3 && std::string(TT.begin(), TT.begin()+3) == "psp")
110 // Install an instruction selector pass using
111 // the ISelDag to gen Mips code.
112 bool MipsTargetMachine::
113 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
115 PM.add(createMipsISelDag(*this));
119 // Implemented by targets that want to run passes immediately before
120 // machine code is emitted. return true if -print-machineinstrs should
121 // print out the code after the passes.
122 bool MipsTargetMachine::
123 addPreEmitPass(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
125 PM.add(createMipsDelaySlotFillerPass(*this));
129 // Implements the AssemblyEmitter for the target. Must return
130 // true if AssemblyEmitter is supported
131 bool MipsTargetMachine::
132 addAssemblyEmitter(PassManagerBase &PM, CodeGenOpt::Level OptLevel,
133 bool Verbose, raw_ostream &Out)
135 // Output assembly language.
136 PM.add(createMipsCodePrinterPass(Out, *this, OptLevel, Verbose));