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 "ARMFrameInfo.h"
17 #include "llvm/PassManager.h"
18 #include "llvm/CodeGen/Passes.h"
19 #include "llvm/Support/FormattedStream.h"
20 #include "llvm/Target/TargetOptions.h"
21 #include "llvm/Target/TargetRegistry.h"
24 static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
26 switch (TheTriple.getOS()) {
28 return new ARMMCAsmInfoDarwin();
30 return new ARMELFMCAsmInfo();
34 extern "C" void LLVMInitializeARMTarget() {
35 // Register the target.
36 RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
37 RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
39 // Register the target asm info.
40 RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
41 RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
44 /// TargetMachine ctor - Create an ARM architecture model.
46 ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
47 const std::string &TT,
48 const std::string &FS,
50 : LLVMTargetMachine(T, TT),
51 Subtarget(TT, FS, isThumb),
54 InstrItins(Subtarget.getInstrItineraryData()) {
55 DefRelocModel = getRelocationModel();
58 ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
59 const std::string &FS)
60 : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
61 DataLayout(Subtarget.isAPCS_ABI() ?
62 std::string("e-p:32:32-f64:32:32-i64:32:32-"
63 "v128:32:128-v64:32:64-n32") :
64 std::string("e-p:32:32-f64:64:64-i64:64:64-"
65 "v128:64:128-v64:64:64-n32")),
70 ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
71 const std::string &FS)
72 : ARMBaseTargetMachine(T, TT, FS, true),
73 InstrInfo(Subtarget.hasThumb2()
74 ? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
75 : ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
76 DataLayout(Subtarget.isAPCS_ABI() ?
77 std::string("e-p:32:32-f64:32:32-i64:32:32-"
78 "i16:16:32-i8:8:32-i1:8:32-"
79 "v128:32:128-v64:32:64-a:0:32-n32") :
80 std::string("e-p:32:32-f64:64:64-i64:64:64-"
81 "i16:16:32-i8:8:32-i1:8:32-"
82 "v128:64:128-v64:64:64-a:0:32-n32")),
87 // Pass Pipeline Configuration
88 bool ARMBaseTargetMachine::addPreISel(PassManagerBase &PM,
89 CodeGenOpt::Level OptLevel) {
90 if (OptLevel != CodeGenOpt::None)
91 PM.add(createARMGlobalMergePass(getTargetLowering()));
96 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
97 CodeGenOpt::Level OptLevel) {
98 PM.add(createARMISelDag(*this, OptLevel));
102 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
103 CodeGenOpt::Level OptLevel) {
104 if (Subtarget.hasNEON())
105 PM.add(createNEONPreAllocPass());
107 // FIXME: temporarily disabling load / store optimization pass for Thumb1.
108 if (OptLevel != CodeGenOpt::None && !Subtarget.isThumb1Only())
109 PM.add(createARMLoadStoreOptimizationPass(true));
114 bool ARMBaseTargetMachine::addPreSched2(PassManagerBase &PM,
115 CodeGenOpt::Level OptLevel) {
116 // FIXME: temporarily disabling load / store optimization pass for Thumb1.
117 if (OptLevel != CodeGenOpt::None) {
118 if (!Subtarget.isThumb1Only())
119 PM.add(createARMLoadStoreOptimizationPass());
120 if (Subtarget.hasNEON())
121 PM.add(createNEONMoveFixPass());
124 // Expand some pseudo instructions into multiple instructions to allow
125 // proper scheduling.
126 PM.add(createARMExpandPseudoPass());
128 if (OptLevel != CodeGenOpt::None) {
129 if (!Subtarget.isThumb1Only())
130 PM.add(createIfConverterPass());
132 if (Subtarget.isThumb2())
133 PM.add(createThumb2ITBlockPass());
138 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
139 CodeGenOpt::Level OptLevel) {
140 if (Subtarget.isThumb2() && !Subtarget.prefers32BitThumb())
141 PM.add(createThumb2SizeReductionPass());
143 PM.add(createARMConstantIslandPass());
147 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
148 CodeGenOpt::Level OptLevel,
149 JITCodeEmitter &JCE) {
150 // FIXME: Move this to TargetJITInfo!
151 if (DefRelocModel == Reloc::Default)
152 setRelocationModel(Reloc::Static);
154 // Machine code emitter pass for ARM.
155 PM.add(createARMJITCodeEmitterPass(*this, JCE));