1 //===-- X86TargetMachine.cpp - Define TargetMachine for the X86 -----------===//
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 // 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"
26 /// X86TargetMachineModule - Note that this is used on hosts that cannot link
27 /// in a library unless there are references into the library. In particular,
28 /// it seems that it is not possible to get things to work on Win32 without
29 /// this. Though it is unused, do not remove it.
30 extern "C" int X86TargetMachineModule;
31 int X86TargetMachineModule = 0;
33 // Register the target.
34 static RegisterTarget<X86_32TargetMachine>
35 X("x86", " 32-bit X86: Pentium-Pro and above");
36 static RegisterTarget<X86_64TargetMachine>
37 Y("x86-64", " 64-bit X86: EM64T and AMD64");
39 const TargetAsmInfo *X86TargetMachine::createTargetAsmInfo() const {
40 return new X86TargetAsmInfo(*this);
43 unsigned X86_32TargetMachine::getJITMatchQuality() {
44 #if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
50 unsigned X86_64TargetMachine::getJITMatchQuality() {
51 #if defined(__x86_64__) || defined(_M_AMD64)
57 unsigned X86_32TargetMachine::getModuleMatchQuality(const Module &M) {
58 // We strongly match "i[3-9]86-*".
59 std::string TT = M.getTargetTriple();
60 if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
61 TT[4] == '-' && TT[1] - '3' < 6)
63 // If the target triple is something non-X86, we don't match.
64 if (!TT.empty()) return 0;
66 if (M.getEndianness() == Module::LittleEndian &&
67 M.getPointerSize() == Module::Pointer32)
68 return 10; // Weak match
69 else if (M.getEndianness() != Module::AnyEndianness ||
70 M.getPointerSize() != Module::AnyPointerSize)
71 return 0; // Match for some other target
73 return getJITMatchQuality()/2;
76 unsigned X86_64TargetMachine::getModuleMatchQuality(const Module &M) {
77 // We strongly match "x86_64-*".
78 std::string TT = M.getTargetTriple();
79 if (TT.size() >= 7 && TT[0] == 'x' && TT[1] == '8' && TT[2] == '6' &&
80 TT[3] == '_' && TT[4] == '6' && TT[5] == '4' && TT[6] == '-')
83 // We strongly match "amd64-*".
84 if (TT.size() >= 6 && TT[0] == 'a' && TT[1] == 'm' && TT[2] == 'd' &&
85 TT[3] == '6' && TT[4] == '4' && TT[5] == '-')
88 // If the target triple is something non-X86-64, we don't match.
89 if (!TT.empty()) return 0;
91 if (M.getEndianness() == Module::LittleEndian &&
92 M.getPointerSize() == Module::Pointer64)
93 return 10; // Weak match
94 else if (M.getEndianness() != Module::AnyEndianness ||
95 M.getPointerSize() != Module::AnyPointerSize)
96 return 0; // Match for some other target
98 return getJITMatchQuality()/2;
101 X86_32TargetMachine::X86_32TargetMachine(const Module &M, const std::string &FS)
102 : X86TargetMachine(M, FS, false) {
106 X86_64TargetMachine::X86_64TargetMachine(const Module &M, const std::string &FS)
107 : X86TargetMachine(M, FS, true) {
110 /// X86TargetMachine ctor - Create an ILP32 architecture model
112 X86TargetMachine::X86TargetMachine(const Module &M, const std::string &FS,
114 : Subtarget(M, FS, is64Bit),
115 DataLayout(Subtarget.getDataLayout()),
116 FrameInfo(TargetFrameInfo::StackGrowsDown,
117 Subtarget.getStackAlignment(), Subtarget.is64Bit() ? -8 : -4),
118 InstrInfo(*this), JITInfo(*this), TLInfo(*this) {
119 DefRelocModel = getRelocationModel();
120 // FIXME: Correctly select PIC model for Win64 stuff
121 if (getRelocationModel() == Reloc::Default) {
122 if (Subtarget.isTargetDarwin() ||
123 (Subtarget.isTargetCygMing() && !Subtarget.isTargetWin64()))
124 setRelocationModel(Reloc::DynamicNoPIC);
126 setRelocationModel(Reloc::Static);
128 if (Subtarget.is64Bit()) {
129 // No DynamicNoPIC support under X86-64.
130 if (getRelocationModel() == Reloc::DynamicNoPIC)
131 setRelocationModel(Reloc::PIC_);
132 // Default X86-64 code model is small.
133 if (getCodeModel() == CodeModel::Default)
134 setCodeModel(CodeModel::Small);
137 if (Subtarget.isTargetCygMing())
138 Subtarget.setPICStyle(PICStyle::WinPIC);
139 else if (Subtarget.isTargetDarwin()) {
140 if (Subtarget.is64Bit())
141 Subtarget.setPICStyle(PICStyle::RIPRel);
143 Subtarget.setPICStyle(PICStyle::Stub);
144 } else if (Subtarget.isTargetELF()) {
145 if (Subtarget.is64Bit())
146 Subtarget.setPICStyle(PICStyle::RIPRel);
148 Subtarget.setPICStyle(PICStyle::GOT);
152 //===----------------------------------------------------------------------===//
153 // Pass Pipeline Configuration
154 //===----------------------------------------------------------------------===//
156 bool X86TargetMachine::addInstSelector(PassManagerBase &PM, bool Fast) {
157 // Install an instruction selector.
158 PM.add(createX86ISelDag(*this, Fast));
162 bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM, bool Fast) {
163 // Calculate and set max stack object alignment early, so we can decide
164 // whether we will need stack realignment (and thus FP).
165 PM.add(createX86MaxStackAlignmentCalculatorPass());
166 return false; // -print-machineinstr shouldn't print after this.
169 bool X86TargetMachine::addPostRegAlloc(PassManagerBase &PM, bool Fast) {
170 PM.add(createX86FloatingPointStackifierPass());
171 return true; // -print-machineinstr should print after this.
174 bool X86TargetMachine::addAssemblyEmitter(PassManagerBase &PM, bool Fast,
176 PM.add(createX86CodePrinterPass(Out, *this));
180 bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM, bool Fast,
181 bool DumpAsm, MachineCodeEmitter &MCE) {
182 // FIXME: Move this to TargetJITInfo!
183 if (DefRelocModel == Reloc::Default)
184 setRelocationModel(Reloc::Static);
186 // JIT cannot ensure globals are placed in the lower 4G of address.
187 if (Subtarget.is64Bit())
188 setCodeModel(CodeModel::Large);
190 PM.add(createX86CodeEmitterPass(*this, MCE));
192 PM.add(createX86CodePrinterPass(*cerr.stream(), *this));
197 bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM, bool Fast,
198 bool DumpAsm, MachineCodeEmitter &MCE) {
199 PM.add(createX86CodeEmitterPass(*this, MCE));
201 PM.add(createX86CodePrinterPass(*cerr.stream(), *this));