ARMTargetMachine.cpp revision a67240399316f42d0da235053c77d71e6204f21f 
1//===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//
11//===----------------------------------------------------------------------===//
12
13#include "ARMTargetMachine.h"
14#include "ARMMCAsmInfo.h"
15#include "ARMFrameInfo.h"
16#include "ARM.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"
23using namespace llvm;
24
25static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
26                              cl::desc("Disable load store optimization pass"));
27static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
28                              cl::desc("Disable if-conversion pass"));
29
30static const MCAsmInfo *createMCAsmInfo(const Target &T,
31                                        const StringRef &TT) {
32  Triple TheTriple(TT);
33  switch (TheTriple.getOS()) {
34  case Triple::Darwin:
35    return new ARMMCAsmInfoDarwin();
36  default:
37    return new ARMELFMCAsmInfo();
38  }
39}
40
41
42extern "C" void LLVMInitializeARMTarget() {
43  // Register the target.
44  RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
45  RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
46
47  // Register the target asm info.
48  RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
49  RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
50}
51
52/// TargetMachine ctor - Create an ARM architecture model.
53///
54ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
55                                           const std::string &TT,
56                                           const std::string &FS,
57                                           bool isThumb)
58  : LLVMTargetMachine(T, TT),
59    Subtarget(TT, FS, isThumb),
60    FrameInfo(Subtarget),
61    JITInfo(),
62    InstrItins(Subtarget.getInstrItineraryData()) {
63  DefRelocModel = getRelocationModel();
64}
65
66ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
67                                   const std::string &FS)
68  : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
69    DataLayout(Subtarget.isAPCS_ABI() ?
70               std::string("e-p:32:32-f64:32:32-i64:32:32") :
71               std::string("e-p:32:32-f64:64:64-i64:64:64")),
72    TLInfo(*this) {
73}
74
75ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
76                                       const std::string &FS)
77  : ARMBaseTargetMachine(T, TT, FS, true),
78    InstrInfo(Subtarget.hasThumb2()
79              ? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
80              : ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
81    DataLayout(Subtarget.isAPCS_ABI() ?
82               std::string("e-p:32:32-f64:32:32-i64:32:32-"
83                           "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
84               std::string("e-p:32:32-f64:64:64-i64:64:64-"
85                           "i16:16:32-i8:8:32-i1:8:32-a:0:32")),
86    TLInfo(*this) {
87}
88
89
90
91// Pass Pipeline Configuration
92bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
93                                           CodeGenOpt::Level OptLevel) {
94  PM.add(createARMISelDag(*this));
95  return false;
96}
97
98bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
99                                          CodeGenOpt::Level OptLevel) {
100  if (Subtarget.hasNEON())
101    PM.add(createNEONPreAllocPass());
102
103  // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
104  if (OptLevel != CodeGenOpt::None && !DisableLdStOpti && !Subtarget.isThumb())
105    PM.add(createARMLoadStoreOptimizationPass(true));
106  return true;
107}
108
109bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
110                                          CodeGenOpt::Level OptLevel) {
111  // FIXME: temporarily disabling load / store optimization pass for Thumb1 mode.
112  if (OptLevel != CodeGenOpt::None && !DisableLdStOpti &&
113      !Subtarget.isThumb1Only())
114    PM.add(createARMLoadStoreOptimizationPass());
115
116  if (OptLevel != CodeGenOpt::None &&
117      !DisableIfConversion && !Subtarget.isThumb1Only())
118    PM.add(createIfConverterPass());
119
120  if (Subtarget.isThumb2()) {
121    PM.add(createThumb2ITBlockPass());
122    PM.add(createThumb2SizeReductionPass());
123  }
124
125  PM.add(createARMConstantIslandPass());
126  return true;
127}
128
129bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
130                                          CodeGenOpt::Level OptLevel,
131                                          MachineCodeEmitter &MCE) {
132  // FIXME: Move this to TargetJITInfo!
133  if (DefRelocModel == Reloc::Default)
134    setRelocationModel(Reloc::Static);
135
136  // Machine code emitter pass for ARM.
137  PM.add(createARMCodeEmitterPass(*this, MCE));
138  return false;
139}
140
141bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
142                                          CodeGenOpt::Level OptLevel,
143                                          JITCodeEmitter &JCE) {
144  // FIXME: Move this to TargetJITInfo!
145  if (DefRelocModel == Reloc::Default)
146    setRelocationModel(Reloc::Static);
147
148  // Machine code emitter pass for ARM.
149  PM.add(createARMJITCodeEmitterPass(*this, JCE));
150  return false;
151}
152
153bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
154                                          CodeGenOpt::Level OptLevel,
155                                          ObjectCodeEmitter &OCE) {
156  // FIXME: Move this to TargetJITInfo!
157  if (DefRelocModel == Reloc::Default)
158    setRelocationModel(Reloc::Static);
159
160  // Machine code emitter pass for ARM.
161  PM.add(createARMObjectCodeEmitterPass(*this, OCE));
162  return false;
163}
164
165bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
166                                                CodeGenOpt::Level OptLevel,
167                                                MachineCodeEmitter &MCE) {
168  // Machine code emitter pass for ARM.
169  PM.add(createARMCodeEmitterPass(*this, MCE));
170  return false;
171}
172
173bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
174                                                CodeGenOpt::Level OptLevel,
175                                                JITCodeEmitter &JCE) {
176  // Machine code emitter pass for ARM.
177  PM.add(createARMJITCodeEmitterPass(*this, JCE));
178  return false;
179}
180
181bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
182                                            CodeGenOpt::Level OptLevel,
183                                            ObjectCodeEmitter &OCE) {
184  // Machine code emitter pass for ARM.
185  PM.add(createARMObjectCodeEmitterPass(*this, OCE));
186  return false;
187}
188
189