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 "ARMMCAsmInfo.h"
15 #include "ARMFrameLowering.h"
17 #include "llvm/PassManager.h"
18 #include "llvm/CodeGen/Passes.h"
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/FormattedStream.h"
21 #include "llvm/Target/TargetOptions.h"
22 #include "llvm/Target/TargetRegistry.h"
25 static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
28 if (TheTriple.isOSDarwin())
29 return new ARMMCAsmInfoDarwin();
31 return new ARMELFMCAsmInfo();
34 // This is duplicated code. Refactor this.
35 static MCStreamer *createMCStreamer(const Target &T, const std::string &TT,
36 MCContext &Ctx, TargetAsmBackend &TAB,
38 MCCodeEmitter *Emitter,
43 if (TheTriple.isOSDarwin())
44 return createMachOStreamer(Ctx, TAB, OS, Emitter, RelaxAll);
46 if (TheTriple.isOSWindows()) {
47 llvm_unreachable("ARM does not support Windows COFF format");
51 return createELFStreamer(Ctx, TAB, OS, Emitter, RelaxAll, NoExecStack);
54 extern "C" void LLVMInitializeARMTarget() {
55 // Register the target.
56 RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
57 RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
59 // Register the target asm info.
60 RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
61 RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
63 // Register the MC Code Emitter
64 TargetRegistry::RegisterCodeEmitter(TheARMTarget, createARMMCCodeEmitter);
65 TargetRegistry::RegisterCodeEmitter(TheThumbTarget, createARMMCCodeEmitter);
67 // Register the asm backend.
68 TargetRegistry::RegisterAsmBackend(TheARMTarget, createARMAsmBackend);
69 TargetRegistry::RegisterAsmBackend(TheThumbTarget, createARMAsmBackend);
71 // Register the object streamer.
72 TargetRegistry::RegisterObjectStreamer(TheARMTarget, createMCStreamer);
73 TargetRegistry::RegisterObjectStreamer(TheThumbTarget, createMCStreamer);
77 /// TargetMachine ctor - Create an ARM architecture model.
79 ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
80 const std::string &TT,
81 const std::string &FS,
83 : LLVMTargetMachine(T, TT),
84 Subtarget(TT, FS, isThumb),
86 InstrItins(Subtarget.getInstrItineraryData()) {
87 DefRelocModel = getRelocationModel();
90 ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
91 const std::string &FS)
92 : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
93 DataLayout(Subtarget.isAPCS_ABI() ?
94 std::string("e-p:32:32-f64:32:64-i64:32:64-"
95 "v128:32:128-v64:32:64-n32") :
96 std::string("e-p:32:32-f64:64:64-i64:64:64-"
97 "v128:64:128-v64:64:64-n32")),
101 FrameLowering(Subtarget) {
102 if (!Subtarget.hasARMOps())
103 report_fatal_error("CPU: '" + Subtarget.getCPUString() + "' does not "
104 "support ARM mode execution!");
107 ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
108 const std::string &FS)
109 : ARMBaseTargetMachine(T, TT, FS, true),
110 InstrInfo(Subtarget.hasThumb2()
111 ? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
112 : ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
113 DataLayout(Subtarget.isAPCS_ABI() ?
114 std::string("e-p:32:32-f64:32:64-i64:32:64-"
115 "i16:16:32-i8:8:32-i1:8:32-"
116 "v128:32:128-v64:32:64-a:0:32-n32") :
117 std::string("e-p:32:32-f64:64:64-i64:64:64-"
118 "i16:16:32-i8:8:32-i1:8:32-"
119 "v128:64:128-v64:64:64-a:0:32-n32")),
120 ELFWriterInfo(*this),
123 FrameLowering(Subtarget.hasThumb2()
124 ? new ARMFrameLowering(Subtarget)
125 : (ARMFrameLowering*)new Thumb1FrameLowering(Subtarget)) {
128 // Pass Pipeline Configuration
129 bool ARMBaseTargetMachine::addPreISel(PassManagerBase &PM,
130 CodeGenOpt::Level OptLevel) {
131 if (OptLevel != CodeGenOpt::None)
132 PM.add(createARMGlobalMergePass(getTargetLowering()));
137 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
138 CodeGenOpt::Level OptLevel) {
139 PM.add(createARMISelDag(*this, OptLevel));
143 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
144 CodeGenOpt::Level OptLevel) {
145 // FIXME: temporarily disabling load / store optimization pass for Thumb1.
146 if (OptLevel != CodeGenOpt::None && !Subtarget.isThumb1Only())
147 PM.add(createARMLoadStoreOptimizationPass(true));
148 if (OptLevel != CodeGenOpt::None && Subtarget.isCortexA9())
149 PM.add(createMLxExpansionPass());
154 bool ARMBaseTargetMachine::addPreSched2(PassManagerBase &PM,
155 CodeGenOpt::Level OptLevel) {
156 // FIXME: temporarily disabling load / store optimization pass for Thumb1.
157 if (OptLevel != CodeGenOpt::None) {
158 if (!Subtarget.isThumb1Only())
159 PM.add(createARMLoadStoreOptimizationPass());
160 if (Subtarget.hasNEON())
161 PM.add(createNEONMoveFixPass());
164 // Expand some pseudo instructions into multiple instructions to allow
165 // proper scheduling.
166 PM.add(createARMExpandPseudoPass());
168 if (OptLevel != CodeGenOpt::None) {
169 if (!Subtarget.isThumb1Only())
170 PM.add(createIfConverterPass());
172 if (Subtarget.isThumb2())
173 PM.add(createThumb2ITBlockPass());
178 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
179 CodeGenOpt::Level OptLevel) {
180 if (Subtarget.isThumb2() && !Subtarget.prefers32BitThumb())
181 PM.add(createThumb2SizeReductionPass());
183 PM.add(createARMConstantIslandPass());
187 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
188 CodeGenOpt::Level OptLevel,
189 JITCodeEmitter &JCE) {
190 // FIXME: Move this to TargetJITInfo!
191 if (DefRelocModel == Reloc::Default)
192 setRelocationModel(Reloc::Static);
194 // Machine code emitter pass for ARM.
195 PM.add(createARMJITCodeEmitterPass(*this, JCE));