1 //===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
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 //===----------------------------------------------------------------------===//
11 //===----------------------------------------------------------------------===//
13 #include "ARMTargetMachine.h"
14 #include "ARMTargetAsmInfo.h"
15 #include "ARMFrameInfo.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/CodeGen/Passes.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/raw_ostream.h"
22 #include "llvm/Target/TargetMachineRegistry.h"
23 #include "llvm/Target/TargetOptions.h"
26 static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
27 cl::desc("Disable load store optimization pass"));
28 static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
29 cl::desc("Disable if-conversion pass"));
31 /// ARMTargetMachineModule - Note that this is used on hosts that cannot link
32 /// in a library unless there are references into the library. In particular,
33 /// it seems that it is not possible to get things to work on Win32 without
34 /// this. Though it is unused, do not remove it.
35 extern "C" int ARMTargetMachineModule;
36 int ARMTargetMachineModule = 0;
38 // Register the target.
39 static RegisterTarget<ARMTargetMachine> X("arm", "ARM");
40 static RegisterTarget<ThumbTargetMachine> Y("thumb", "Thumb");
42 // No assembler printer by default
43 ARMTargetMachine::AsmPrinterCtorFn ARMTargetMachine::AsmPrinterCtor = 0;
45 /// ThumbTargetMachine - Create an Thumb architecture model.
47 unsigned ThumbTargetMachine::getJITMatchQuality() {
48 #if defined(__thumb__)
54 unsigned ThumbTargetMachine::getModuleMatchQuality(const Module &M) {
55 std::string TT = M.getTargetTriple();
56 // Match thumb-foo-bar, as well as things like thumbv5blah-*
58 (TT.substr(0, 6) == "thumb-" || TT.substr(0, 6) == "thumbv"))
61 // If the target triple is something non-thumb, we don't match.
62 if (!TT.empty()) return 0;
64 if (M.getEndianness() == Module::LittleEndian &&
65 M.getPointerSize() == Module::Pointer32)
66 return 10; // Weak match
67 else if (M.getEndianness() != Module::AnyEndianness ||
68 M.getPointerSize() != Module::AnyPointerSize)
69 return 0; // Match for some other target
71 return getJITMatchQuality()/2;
74 ThumbTargetMachine::ThumbTargetMachine(const Module &M, const std::string &FS)
75 : ARMTargetMachine(M, FS, true) {
78 /// TargetMachine ctor - Create an ARM architecture model.
80 ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS,
82 : Subtarget(M, FS, isThumb),
83 DataLayout(Subtarget.isAPCS_ABI() ?
86 std::string("e-p:32:32-f64:32:32-i64:32:32-"
87 "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
88 std::string("e-p:32:32-f64:32:32-i64:32:32")) :
91 std::string("e-p:32:32-f64:64:64-i64:64:64-"
92 "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
93 std::string("e-p:32:32-f64:64:64-i64:64:64"))),
98 DefRelocModel = getRelocationModel();
101 unsigned ARMTargetMachine::getJITMatchQuality() {
108 unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
109 std::string TT = M.getTargetTriple();
110 // Match arm-foo-bar, as well as things like armv5blah-*
111 if (TT.size() >= 4 &&
112 (TT.substr(0, 4) == "arm-" || TT.substr(0, 4) == "armv"))
114 // If the target triple is something non-arm, we don't match.
115 if (!TT.empty()) return 0;
117 if (M.getEndianness() == Module::LittleEndian &&
118 M.getPointerSize() == Module::Pointer32)
119 return 10; // Weak match
120 else if (M.getEndianness() != Module::AnyEndianness ||
121 M.getPointerSize() != Module::AnyPointerSize)
122 return 0; // Match for some other target
124 return getJITMatchQuality()/2;
128 const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const {
129 switch (Subtarget.TargetType) {
130 case ARMSubtarget::isDarwin:
131 return new ARMDarwinTargetAsmInfo(*this);
132 case ARMSubtarget::isELF:
133 return new ARMELFTargetAsmInfo(*this);
135 return new ARMGenericTargetAsmInfo(*this);
140 // Pass Pipeline Configuration
141 bool ARMTargetMachine::addInstSelector(PassManagerBase &PM, bool Fast) {
142 PM.add(createARMISelDag(*this));
146 bool ARMTargetMachine::addPreEmitPass(PassManagerBase &PM, bool Fast) {
147 // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
148 if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
149 PM.add(createARMLoadStoreOptimizationPass());
151 if (!Fast && !DisableIfConversion && !Subtarget.isThumb())
152 PM.add(createIfConverterPass());
154 PM.add(createARMConstantIslandPass());
158 bool ARMTargetMachine::addAssemblyEmitter(PassManagerBase &PM, bool Fast,
160 // Output assembly language.
161 assert(AsmPrinterCtor && "AsmPrinter was not linked in");
163 PM.add(AsmPrinterCtor(Out, *this, Fast));
169 bool ARMTargetMachine::addCodeEmitter(PassManagerBase &PM, bool Fast,
170 bool DumpAsm, MachineCodeEmitter &MCE) {
171 // FIXME: Move this to TargetJITInfo!
172 if (DefRelocModel == Reloc::Default)
173 setRelocationModel(Reloc::Static);
175 // Machine code emitter pass for ARM.
176 PM.add(createARMCodeEmitterPass(*this, MCE));
178 assert(AsmPrinterCtor && "AsmPrinter was not linked in");
180 PM.add(AsmPrinterCtor(errs(), *this, Fast));
186 bool ARMTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM, bool Fast,
187 bool DumpAsm, MachineCodeEmitter &MCE) {
188 // Machine code emitter pass for ARM.
189 PM.add(createARMCodeEmitterPass(*this, MCE));
191 assert(AsmPrinterCtor && "AsmPrinter was not linked in");
193 PM.add(AsmPrinterCtor(errs(), *this, Fast));