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 "X86TargetMachine.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/Passes.h"
21 #include "llvm/Target/TargetOptions.h"
22 #include "llvm/Target/TargetMachineRegistry.h"
23 #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 unsigned X86_32TargetMachine::getJITMatchQuality() {
47 #if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
53 unsigned X86_64TargetMachine::getJITMatchQuality() {
54 #if defined(__x86_64__)
60 unsigned X86_32TargetMachine::getModuleMatchQuality(const Module &M) {
61 // We strongly match "i[3-9]86-*".
62 std::string TT = M.getTargetTriple();
63 if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
64 TT[4] == '-' && TT[1] - '3' < 6)
67 if (M.getEndianness() == Module::LittleEndian &&
68 M.getPointerSize() == Module::Pointer32)
69 return 10; // Weak match
70 else if (M.getEndianness() != Module::AnyEndianness ||
71 M.getPointerSize() != Module::AnyPointerSize)
72 return 0; // Match for some other target
74 return getJITMatchQuality()/2;
77 unsigned X86_64TargetMachine::getModuleMatchQuality(const Module &M) {
78 // We strongly match "x86_64-*".
79 std::string TT = M.getTargetTriple();
80 if (TT.size() >= 7 && TT[0] == 'x' && TT[1] == '8' && TT[2] == '6' &&
81 TT[3] == '_' && TT[4] == '6' && TT[5] == '4' && TT[6] == '-')
84 if (M.getEndianness() == Module::LittleEndian &&
85 M.getPointerSize() == Module::Pointer64)
86 return 10; // Weak match
87 else if (M.getEndianness() != Module::AnyEndianness ||
88 M.getPointerSize() != Module::AnyPointerSize)
89 return 0; // Match for some other target
91 return getJITMatchQuality()/2;
94 X86_32TargetMachine::X86_32TargetMachine(const Module &M, const std::string &FS)
95 : X86TargetMachine(M, FS, false) {
99 X86_64TargetMachine::X86_64TargetMachine(const Module &M, const std::string &FS)
100 : X86TargetMachine(M, FS, true) {
103 /// X86TargetMachine ctor - Create an ILP32 architecture model
105 X86TargetMachine::X86TargetMachine(const Module &M, const std::string &FS, bool is64Bit)
106 : Subtarget(M, FS, is64Bit),
107 DataLayout(Subtarget.is64Bit() ?
108 std::string("e-p:64:64-d:32-l:32") :
109 std::string("e-p:32:32-d:32-l:32")),
110 FrameInfo(TargetFrameInfo::StackGrowsDown,
111 Subtarget.getStackAlignment(), Subtarget.is64Bit() ? -8 : -4),
112 InstrInfo(*this), JITInfo(*this), TLInfo(*this) {
113 if (getRelocationModel() == Reloc::Default)
114 if (Subtarget.isTargetDarwin())
115 setRelocationModel(Reloc::DynamicNoPIC);
117 setRelocationModel(Reloc::PIC_);
118 if (Subtarget.is64Bit()) {
119 // No DynamicNoPIC support under X86-64.
120 if (getRelocationModel() == Reloc::DynamicNoPIC)
121 setRelocationModel(Reloc::PIC_);
122 // Default X86-64 code model is small.
123 if (getCodeModel() == CodeModel::Default)
124 setCodeModel(CodeModel::Small);
128 //===----------------------------------------------------------------------===//
129 // Pass Pipeline Configuration
130 //===----------------------------------------------------------------------===//
132 bool X86TargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
133 // Install an instruction selector.
134 PM.add(createX86ISelDag(*this, Fast));
138 bool X86TargetMachine::addPostRegAlloc(FunctionPassManager &PM, bool Fast) {
139 PM.add(createX86FloatingPointStackifierPass());
140 return true; // -print-machineinstr should print after this.
143 bool X86TargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
145 PM.add(createX86CodePrinterPass(Out, *this));
149 bool X86TargetMachine::addObjectWriter(FunctionPassManager &PM, bool Fast,
151 if (Subtarget.isTargetELF()) {
152 addX86ELFObjectWriterPass(PM, Out, *this);
158 bool X86TargetMachine::addCodeEmitter(FunctionPassManager &PM, bool Fast,
159 MachineCodeEmitter &MCE) {
160 // FIXME: Move this to TargetJITInfo!
161 setRelocationModel(Reloc::Static);
163 PM.add(createX86CodeEmitterPass(*this, MCE));