1 //===-- X86TargetMachine.cpp - Define TargetMachine for the X86 -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the X86 specific subclass of TargetMachine.
12 //===----------------------------------------------------------------------===//
14 #include "X86TargetAsmInfo.h"
15 #include "X86TargetObjInfo.h"
16 #include "X86TargetMachine.h"
18 #include "llvm/Module.h"
19 #include "llvm/PassManager.h"
20 #include "llvm/CodeGen/MachineFunction.h"
21 #include "llvm/CodeGen/Passes.h"
22 #include "llvm/Target/TargetOptions.h"
23 #include "llvm/Target/TargetMachineRegistry.h"
24 #include "llvm/Transforms/Scalar.h"
27 /// X86TargetMachineModule - Note that this is used on hosts that cannot link
28 /// in a library unless there are references into the library. In particular,
29 /// it seems that it is not possible to get things to work on Win32 without
30 /// this. Though it is unused, do not remove it.
31 extern "C" int X86TargetMachineModule;
32 int X86TargetMachineModule = 0;
35 // Register the target.
36 RegisterTarget<X86_32TargetMachine>
37 X("x86", " 32-bit X86: Pentium-Pro and above");
38 RegisterTarget<X86_64TargetMachine>
39 Y("x86-64", " 64-bit X86: EM64T and AMD64");
42 const TargetAsmInfo *X86TargetMachine::createTargetAsmInfo() const {
43 return new X86TargetAsmInfo(*this);
46 const TargetObjInfo *X86TargetMachine::createTargetObjInfo() const {
47 return new ELFTargetObjInfo(*this);
50 unsigned X86_32TargetMachine::getJITMatchQuality() {
51 #if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
57 unsigned X86_64TargetMachine::getJITMatchQuality() {
58 #if defined(__x86_64__)
64 unsigned X86_32TargetMachine::getModuleMatchQuality(const Module &M) {
65 // We strongly match "i[3-9]86-*".
66 std::string TT = M.getTargetTriple();
67 if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
68 TT[4] == '-' && TT[1] - '3' < 6)
71 if (M.getEndianness() == Module::LittleEndian &&
72 M.getPointerSize() == Module::Pointer32)
73 return 10; // Weak match
74 else if (M.getEndianness() != Module::AnyEndianness ||
75 M.getPointerSize() != Module::AnyPointerSize)
76 return 0; // Match for some other target
78 return getJITMatchQuality()/2;
81 unsigned X86_64TargetMachine::getModuleMatchQuality(const Module &M) {
82 // We strongly match "x86_64-*".
83 std::string TT = M.getTargetTriple();
84 if (TT.size() >= 7 && TT[0] == 'x' && TT[1] == '8' && TT[2] == '6' &&
85 TT[3] == '_' && TT[4] == '6' && TT[5] == '4' && TT[6] == '-')
88 // We strongly match "amd64-*".
89 if (TT.size() >= 6 && TT[0] == 'a' && TT[1] == 'm' && TT[2] == 'd' &&
90 TT[3] == '6' && TT[4] == '4' && TT[5] == '-')
93 if (M.getEndianness() == Module::LittleEndian &&
94 M.getPointerSize() == Module::Pointer64)
95 return 10; // Weak match
96 else if (M.getEndianness() != Module::AnyEndianness ||
97 M.getPointerSize() != Module::AnyPointerSize)
98 return 0; // Match for some other target
100 return getJITMatchQuality()/2;
103 X86_32TargetMachine::X86_32TargetMachine(const Module &M, const std::string &FS)
104 : X86TargetMachine(M, FS, false) {
108 X86_64TargetMachine::X86_64TargetMachine(const Module &M, const std::string &FS)
109 : X86TargetMachine(M, FS, true) {
112 /// X86TargetMachine ctor - Create an ILP32 architecture model
114 X86TargetMachine::X86TargetMachine(const Module &M, const std::string &FS, bool is64Bit)
115 : Subtarget(M, FS, is64Bit),
116 DataLayout(Subtarget.is64Bit() ?
117 std::string("e-p:64:64-d:32-l:32") :
118 std::string("e-p:32:32-d:32-l:32")),
119 FrameInfo(TargetFrameInfo::StackGrowsDown,
120 Subtarget.getStackAlignment(), Subtarget.is64Bit() ? -8 : -4),
121 InstrInfo(*this), JITInfo(*this), TLInfo(*this) {
122 if (getRelocationModel() == Reloc::Default)
123 if (Subtarget.isTargetDarwin() || Subtarget.isTargetCygMing())
124 setRelocationModel(Reloc::DynamicNoPIC);
126 setRelocationModel(Reloc::Static);
127 if (Subtarget.is64Bit()) {
128 // No DynamicNoPIC support under X86-64.
129 if (getRelocationModel() == Reloc::DynamicNoPIC)
130 setRelocationModel(Reloc::PIC_);
131 // Default X86-64 code model is small.
132 if (getCodeModel() == CodeModel::Default)
133 setCodeModel(CodeModel::Small);
136 if (getRelocationModel() == Reloc::PIC_) {
137 if (Subtarget.isTargetDarwin()) {
138 if (Subtarget.is64Bit())
139 Subtarget.setPICStyle(PICStyle::RIPRel);
141 Subtarget.setPICStyle(PICStyle::Stub);
142 } else if (Subtarget.isTargetELF())
143 Subtarget.setPICStyle(PICStyle::GOT);
145 assert(0 && "Don't know how to generate PIC code for this target!");
146 } else if (getRelocationModel() == Reloc::DynamicNoPIC) {
147 if (Subtarget.isTargetDarwin())
148 Subtarget.setPICStyle(PICStyle::Stub);
149 else if (Subtarget.isTargetCygMing())
150 Subtarget.setPICStyle(PICStyle::WinPIC);
152 assert(0 && "Don't know how to generate PIC code for this target!");
156 //===----------------------------------------------------------------------===//
157 // Pass Pipeline Configuration
158 //===----------------------------------------------------------------------===//
160 bool X86TargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
161 // Install an instruction selector.
162 PM.add(createX86ISelDag(*this, Fast));
166 bool X86TargetMachine::addPostRegAlloc(FunctionPassManager &PM, bool Fast) {
167 PM.add(createX86FloatingPointStackifierPass());
168 return true; // -print-machineinstr should print after this.
171 bool X86TargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
173 PM.add(createX86CodePrinterPass(Out, *this));
177 bool X86TargetMachine::addObjectWriter(FunctionPassManager &PM, bool Fast,
179 if (Subtarget.isTargetELF()) {
180 addX86ELFObjectWriterPass(PM, Out, *this);
186 bool X86TargetMachine::addCodeEmitter(FunctionPassManager &PM, bool Fast,
187 MachineCodeEmitter &MCE) {
188 // FIXME: Move this to TargetJITInfo!
189 setRelocationModel(Reloc::Static);
190 Subtarget.setPICStyle(PICStyle::None);
192 // JIT cannot ensure globals are placed in the lower 4G of address.
193 if (Subtarget.is64Bit())
194 setCodeModel(CodeModel::Large);
196 PM.add(createX86CodeEmitterPass(*this, MCE));