LLVM  4.0.0
PPCSubtarget.h
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1 //===-- PPCSubtarget.h - Define Subtarget for the PPC ----------*- C++ -*--===//
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 // This file declares the PowerPC specific subclass of TargetSubtargetInfo.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_POWERPC_PPCSUBTARGET_H
15 #define LLVM_LIB_TARGET_POWERPC_PPCSUBTARGET_H
16 
17 #include "PPCFrameLowering.h"
18 #include "PPCISelLowering.h"
19 #include "PPCInstrInfo.h"
20 #include "llvm/ADT/Triple.h"
22 #include "llvm/IR/DataLayout.h"
25 #include <string>
26 
27 #define GET_SUBTARGETINFO_HEADER
28 #include "PPCGenSubtargetInfo.inc"
29 
30 // GCC #defines PPC on Linux but we use it as our namespace name
31 #undef PPC
32 
33 namespace llvm {
34 class StringRef;
35 
36 namespace PPC {
37  // -m directive values.
38  enum {
61  };
62 }
63 
64 class GlobalValue;
65 class TargetMachine;
66 
68 public:
69  enum POPCNTDKind {
73  };
74 
75 protected:
76  /// TargetTriple - What processor and OS we're targeting.
78 
79  /// stackAlignment - The minimum alignment known to hold of the stack frame on
80  /// entry to the function and which must be maintained by every function.
81  unsigned StackAlignment;
82 
83  /// Selected instruction itineraries (one entry per itinerary class.)
85 
86  /// Which cpu directive was used.
87  unsigned DarwinDirective;
88 
89  /// Used by the ISel to turn in optimizations for POWER4-derived architectures
90  bool HasMFOCRF;
93  bool UseCRBits;
95  bool IsPPC64;
96  bool HasAltivec;
97  bool HasSPE;
98  bool HasQPX;
99  bool HasVSX;
105  bool HasFCPSGN;
106  bool HasFSQRT;
109  bool HasSTFIWX;
110  bool HasLFIWAX;
111  bool HasFPRND;
112  bool HasFPCVT;
113  bool HasISEL;
114  bool HasBPERMD;
115  bool HasExtDiv;
116  bool HasCMPB;
117  bool HasLDBRX;
118  bool IsBookE;
120  bool IsE500;
121  bool IsPPC4xx;
122  bool IsPPC6xx;
127  bool HasICBT;
131  bool HasHTM;
132  bool HasFusion;
134  bool IsISA3_0;
136 
138 
139  /// When targeting QPX running a stock PPC64 Linux kernel where the stack
140  /// alignment has not been changed, we need to keep the 16-byte alignment
141  /// of the stack.
143 
149 
150 public:
151  /// This constructor initializes the data members to match that
152  /// of the specified triple.
153  ///
154  PPCSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
155  const PPCTargetMachine &TM);
156 
157  /// ParseSubtargetFeatures - Parses features string setting specified
158  /// subtarget options. Definition of function is auto generated by tblgen.
160 
161  /// getStackAlignment - Returns the minimum alignment known to hold of the
162  /// stack frame on entry to the function and which must be maintained by every
163  /// function for this subtarget.
164  unsigned getStackAlignment() const { return StackAlignment; }
165 
166  /// getDarwinDirective - Returns the -m directive specified for the cpu.
167  ///
168  unsigned getDarwinDirective() const { return DarwinDirective; }
169 
170  /// getInstrItins - Return the instruction itineraries based on subtarget
171  /// selection.
172  const InstrItineraryData *getInstrItineraryData() const override {
173  return &InstrItins;
174  }
175 
176  const PPCFrameLowering *getFrameLowering() const override {
177  return &FrameLowering;
178  }
179  const PPCInstrInfo *getInstrInfo() const override { return &InstrInfo; }
180  const PPCTargetLowering *getTargetLowering() const override {
181  return &TLInfo;
182  }
183  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
184  return &TSInfo;
185  }
186  const PPCRegisterInfo *getRegisterInfo() const override {
187  return &getInstrInfo()->getRegisterInfo();
188  }
189  const PPCTargetMachine &getTargetMachine() const { return TM; }
190 
191  /// initializeSubtargetDependencies - Initializes using a CPU and feature string
192  /// so that we can use initializer lists for subtarget initialization.
194 
195 private:
196  void initializeEnvironment();
197  void initSubtargetFeatures(StringRef CPU, StringRef FS);
198 
199 public:
200  /// isPPC64 - Return true if we are generating code for 64-bit pointer mode.
201  ///
202  bool isPPC64() const;
203 
204  /// has64BitSupport - Return true if the selected CPU supports 64-bit
205  /// instructions, regardless of whether we are in 32-bit or 64-bit mode.
206  bool has64BitSupport() const { return Has64BitSupport; }
207  // useSoftFloat - Return true if soft-float option is turned on.
208  bool useSoftFloat() const { return !HasHardFloat; }
209 
210  /// use64BitRegs - Return true if in 64-bit mode or if we should use 64-bit
211  /// registers in 32-bit mode when possible. This can only true if
212  /// has64BitSupport() returns true.
213  bool use64BitRegs() const { return Use64BitRegs; }
214 
215  /// useCRBits - Return true if we should store and manipulate i1 values in
216  /// the individual condition register bits.
217  bool useCRBits() const { return UseCRBits; }
218 
219  /// hasLazyResolverStub - Return true if accesses to the specified global have
220  /// to go through a dyld lazy resolution stub. This means that an extra load
221  /// is required to get the address of the global.
222  bool hasLazyResolverStub(const GlobalValue *GV) const;
223 
224  // isLittleEndian - True if generating little-endian code
225  bool isLittleEndian() const { return IsLittleEndian; }
226 
227  // Specific obvious features.
228  bool hasFCPSGN() const { return HasFCPSGN; }
229  bool hasFSQRT() const { return HasFSQRT; }
230  bool hasFRE() const { return HasFRE; }
231  bool hasFRES() const { return HasFRES; }
232  bool hasFRSQRTE() const { return HasFRSQRTE; }
233  bool hasFRSQRTES() const { return HasFRSQRTES; }
234  bool hasRecipPrec() const { return HasRecipPrec; }
235  bool hasSTFIWX() const { return HasSTFIWX; }
236  bool hasLFIWAX() const { return HasLFIWAX; }
237  bool hasFPRND() const { return HasFPRND; }
238  bool hasFPCVT() const { return HasFPCVT; }
239  bool hasAltivec() const { return HasAltivec; }
240  bool hasSPE() const { return HasSPE; }
241  bool hasQPX() const { return HasQPX; }
242  bool hasVSX() const { return HasVSX; }
243  bool hasP8Vector() const { return HasP8Vector; }
244  bool hasP8Altivec() const { return HasP8Altivec; }
245  bool hasP8Crypto() const { return HasP8Crypto; }
246  bool hasP9Vector() const { return HasP9Vector; }
247  bool hasP9Altivec() const { return HasP9Altivec; }
248  bool hasMFOCRF() const { return HasMFOCRF; }
249  bool hasISEL() const { return HasISEL; }
250  bool hasBPERMD() const { return HasBPERMD; }
251  bool hasExtDiv() const { return HasExtDiv; }
252  bool hasCMPB() const { return HasCMPB; }
253  bool hasLDBRX() const { return HasLDBRX; }
254  bool isBookE() const { return IsBookE; }
255  bool hasOnlyMSYNC() const { return HasOnlyMSYNC; }
256  bool isPPC4xx() const { return IsPPC4xx; }
257  bool isPPC6xx() const { return IsPPC6xx; }
258  bool isE500() const { return IsE500; }
259  bool isFeatureMFTB() const { return FeatureMFTB; }
260  bool isDeprecatedDST() const { return DeprecatedDST; }
261  bool hasICBT() const { return HasICBT; }
264  }
265  bool hasPartwordAtomics() const { return HasPartwordAtomics; }
266  bool hasDirectMove() const { return HasDirectMove; }
267 
268  bool isQPXStackUnaligned() const { return IsQPXStackUnaligned; }
269  unsigned getPlatformStackAlignment() const {
270  if ((hasQPX() || isBGQ()) && !isQPXStackUnaligned())
271  return 32;
272 
273  return 16;
274  }
275  bool hasHTM() const { return HasHTM; }
276  bool hasFusion() const { return HasFusion; }
277  bool hasFloat128() const { return HasFloat128; }
278  bool isISA3_0() const { return IsISA3_0; }
279  bool useLongCalls() const { return UseLongCalls; }
280  bool needsSwapsForVSXMemOps() const {
281  return hasVSX() && isLittleEndian() && !hasP9Vector();
282  }
283 
284  POPCNTDKind hasPOPCNTD() const { return HasPOPCNTD; }
285 
286  const Triple &getTargetTriple() const { return TargetTriple; }
287 
288  /// isDarwin - True if this is any darwin platform.
289  bool isDarwin() const { return TargetTriple.isMacOSX(); }
290  /// isBGQ - True if this is a BG/Q platform.
291  bool isBGQ() const { return TargetTriple.getVendor() == Triple::BGQ; }
292 
293  bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
294  bool isTargetMachO() const { return TargetTriple.isOSBinFormatMachO(); }
295  bool isTargetLinux() const { return TargetTriple.isOSLinux(); }
296 
297  bool isDarwinABI() const { return isTargetMachO() || isDarwin(); }
298  bool isSVR4ABI() const { return !isDarwinABI(); }
299  bool isELFv2ABI() const;
300 
301  bool enableEarlyIfConversion() const override { return hasISEL(); }
302 
303  // Scheduling customization.
304  bool enableMachineScheduler() const override;
305  // This overrides the PostRAScheduler bit in the SchedModel for each CPU.
306  bool enablePostRAScheduler() const override;
307  AntiDepBreakMode getAntiDepBreakMode() const override;
308  void getCriticalPathRCs(RegClassVector &CriticalPathRCs) const override;
309 
311  unsigned NumRegionInstrs) const override;
312  bool useAA() const override;
313 
314  bool enableSubRegLiveness() const override;
315 
316  /// classifyGlobalReference - Classify a global variable reference for the
317  /// current subtarget accourding to how we should reference it.
318  unsigned char classifyGlobalReference(const GlobalValue *GV) const;
319 };
320 } // End llvm namespace
321 
322 #endif
void overrideSchedPolicy(MachineSchedPolicy &Policy, unsigned NumRegionInstrs) const override
bool hasLDBRX() const
Definition: PPCSubtarget.h:253
PPCSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const PPCTargetMachine &TM)
This constructor initializes the data members to match that of the specified triple.
bool use64BitRegs() const
use64BitRegs - Return true if in 64-bit mode or if we should use 64-bit registers in 32-bit mode when...
Definition: PPCSubtarget.h:213
bool isTargetELF() const
Definition: PPCSubtarget.h:293
bool enableEarlyIfConversion() const override
Definition: PPCSubtarget.h:301
bool isOSBinFormatMachO() const
Tests whether the environment is MachO.
Definition: Triple.h:575
bool hasMFOCRF() const
Definition: PPCSubtarget.h:248
const SelectionDAGTargetInfo * getSelectionDAGInfo() const override
Definition: PPCSubtarget.h:183
bool isTargetMachO() const
Definition: PPCSubtarget.h:294
bool isLittleEndian() const
Definition: PPCSubtarget.h:225
bool isDarwinABI() const
Definition: PPCSubtarget.h:297
const PPCTargetMachine & getTargetMachine() const
Definition: PPCSubtarget.h:189
unsigned getStackAlignment() const
getStackAlignment - Returns the minimum alignment known to hold of the stack frame on entry to the fu...
Definition: PPCSubtarget.h:164
bool IsQPXStackUnaligned
When targeting QPX running a stock PPC64 Linux kernel where the stack alignment has not been changed...
Definition: PPCSubtarget.h:142
bool hasISEL() const
Definition: PPCSubtarget.h:249
bool useAA() const override
bool isQPXStackUnaligned() const
Definition: PPCSubtarget.h:268
bool hasLazyResolverStub(const GlobalValue *GV) const
hasLazyResolverStub - Return true if accesses to the specified global have to go through a dyld lazy ...
unsigned StackAlignment
stackAlignment - The minimum alignment known to hold of the stack frame on entry to the function and ...
Definition: PPCSubtarget.h:81
bool hasP9Altivec() const
Definition: PPCSubtarget.h:247
bool isDarwin() const
isDarwin - True if this is any darwin platform.
Definition: PPCSubtarget.h:289
bool hasAltivec() const
Definition: PPCSubtarget.h:239
bool hasQPX() const
Definition: PPCSubtarget.h:241
bool hasP9Vector() const
Definition: PPCSubtarget.h:246
bool isMacOSX() const
isMacOSX - Is this a Mac OS X triple.
Definition: Triple.h:427
SelectionDAGTargetInfo TSInfo
Definition: PPCSubtarget.h:148
unsigned getPlatformStackAlignment() const
Definition: PPCSubtarget.h:269
bool hasFPRND() const
Definition: PPCSubtarget.h:237
POPCNTDKind HasPOPCNTD
Definition: PPCSubtarget.h:137
unsigned DarwinDirective
Which cpu directive was used.
Definition: PPCSubtarget.h:87
bool isOSLinux() const
Tests whether the OS is Linux.
Definition: Triple.h:550
bool isBGQ() const
isBGQ - True if this is a BG/Q platform.
Definition: PPCSubtarget.h:291
bool hasInvariantFunctionDescriptors() const
Definition: PPCSubtarget.h:262
Itinerary data supplied by a subtarget to be used by a target.
InstrItineraryData InstrItins
Selected instruction itineraries (one entry per itinerary class.)
Definition: PPCSubtarget.h:84
bool isPPC6xx() const
Definition: PPCSubtarget.h:257
bool isELFv2ABI() const
bool enableSubRegLiveness() const override
const Triple & getTargetTriple() const
Definition: PPCSubtarget.h:286
AntiDepBreakMode getAntiDepBreakMode() const override
PPCSubtarget & initializeSubtargetDependencies(StringRef CPU, StringRef FS)
initializeSubtargetDependencies - Initializes using a CPU and feature string so that we can use initi...
bool HasInvariantFunctionDescriptors
Definition: PPCSubtarget.h:128
POPCNTDKind hasPOPCNTD() const
Definition: PPCSubtarget.h:284
PPCFrameLowering FrameLowering
Definition: PPCSubtarget.h:145
PPCInstrInfo InstrInfo
Definition: PPCSubtarget.h:146
const PPCFrameLowering * getFrameLowering() const override
Definition: PPCSubtarget.h:176
bool isBookE() const
Definition: PPCSubtarget.h:254
const PPCTargetLowering * getTargetLowering() const override
Definition: PPCSubtarget.h:180
bool hasFSQRT() const
Definition: PPCSubtarget.h:229
bool has64BitSupport() const
has64BitSupport - Return true if the selected CPU supports 64-bit instructions, regardless of whether...
Definition: PPCSubtarget.h:206
bool isFeatureMFTB() const
Definition: PPCSubtarget.h:259
bool isE500() const
Definition: PPCSubtarget.h:258
Common code between 32-bit and 64-bit PowerPC targets.
Targets can subclass this to parameterize the SelectionDAG lowering and instruction selection process...
bool hasFPCVT() const
Definition: PPCSubtarget.h:238
bool isSVR4ABI() const
Definition: PPCSubtarget.h:298
bool hasOnlyMSYNC() const
Definition: PPCSubtarget.h:255
const PPCTargetMachine & TM
Definition: PPCSubtarget.h:144
bool isPPC4xx() const
Definition: PPCSubtarget.h:256
bool hasPartwordAtomics() const
Definition: PPCSubtarget.h:265
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
bool isTargetLinux() const
Definition: PPCSubtarget.h:295
bool hasRecipPrec() const
Definition: PPCSubtarget.h:234
bool hasLFIWAX() const
Definition: PPCSubtarget.h:236
bool needsSwapsForVSXMemOps() const
Definition: PPCSubtarget.h:280
const PPCRegisterInfo * getRegisterInfo() const override
Definition: PPCSubtarget.h:186
bool hasP8Altivec() const
Definition: PPCSubtarget.h:244
void getCriticalPathRCs(RegClassVector &CriticalPathRCs) const override
bool hasDirectMove() const
Definition: PPCSubtarget.h:266
const PPCInstrInfo * getInstrInfo() const override
Definition: PPCSubtarget.h:179
bool useSoftFloat() const
Definition: PPCSubtarget.h:208
bool hasBPERMD() const
Definition: PPCSubtarget.h:250
void ParseSubtargetFeatures(StringRef CPU, StringRef FS)
ParseSubtargetFeatures - Parses features string setting specified subtarget options.
Triple TargetTriple
TargetTriple - What processor and OS we're targeting.
Definition: PPCSubtarget.h:77
bool hasSTFIWX() const
Definition: PPCSubtarget.h:235
bool enableMachineScheduler() const override
bool hasSPE() const
Definition: PPCSubtarget.h:240
const PPCRegisterInfo & getRegisterInfo() const
getRegisterInfo - TargetInstrInfo is a superset of MRegister info.
Definition: PPCInstrInfo.h:114
Define a generic scheduling policy for targets that don't provide their own MachineSchedStrategy.
const InstrItineraryData * getInstrItineraryData() const override
getInstrItins - Return the instruction itineraries based on subtarget selection.
Definition: PPCSubtarget.h:172
bool isOSBinFormatELF() const
Tests whether the OS uses the ELF binary format.
Definition: Triple.h:565
bool hasHTM() const
Definition: PPCSubtarget.h:275
bool useLongCalls() const
Definition: PPCSubtarget.h:279
PPCTargetLowering TLInfo
Definition: PPCSubtarget.h:147
bool hasVSX() const
Definition: PPCSubtarget.h:242
bool hasP8Crypto() const
Definition: PPCSubtarget.h:245
bool isISA3_0() const
Definition: PPCSubtarget.h:278
bool hasFusion() const
Definition: PPCSubtarget.h:276
bool useCRBits() const
useCRBits - Return true if we should store and manipulate i1 values in the individual condition regis...
Definition: PPCSubtarget.h:217
bool hasP8Vector() const
Definition: PPCSubtarget.h:243
bool hasCMPB() const
Definition: PPCSubtarget.h:252
bool hasICBT() const
Definition: PPCSubtarget.h:261
bool isDeprecatedDST() const
Definition: PPCSubtarget.h:260
bool isPPC64() const
isPPC64 - Return true if we are generating code for 64-bit pointer mode.
unsigned char classifyGlobalReference(const GlobalValue *GV) const
classifyGlobalReference - Classify a global variable reference for the current subtarget accourding t...
bool hasFloat128() const
Definition: PPCSubtarget.h:277
unsigned getDarwinDirective() const
getDarwinDirective - Returns the -m directive specified for the cpu.
Definition: PPCSubtarget.h:168
VendorType getVendor() const
getVendor - Get the parsed vendor type of this triple.
Definition: Triple.h:276
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:47
bool hasFRSQRTE() const
Definition: PPCSubtarget.h:232
bool hasFRES() const
Definition: PPCSubtarget.h:231
bool hasFCPSGN() const
Definition: PPCSubtarget.h:228
bool hasFRE() const
Definition: PPCSubtarget.h:230
bool HasMFOCRF
Used by the ISel to turn in optimizations for POWER4-derived architectures.
Definition: PPCSubtarget.h:90
bool hasFRSQRTES() const
Definition: PPCSubtarget.h:233
bool hasExtDiv() const
Definition: PPCSubtarget.h:251
bool enablePostRAScheduler() const override