TargetLowering.h revision d90ef9ef2b24047f46973a43390a3191fc1fee63
1//===-- llvm/Target/TargetLowering.h - Target Lowering Info -----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by the LLVM research group and is distributed under 6// the University of Illinois Open Source License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file describes how to lower LLVM code to machine code. This has two 11// main components: 12// 13// 1. Which ValueTypes are natively supported by the target. 14// 2. Which operations are supported for supported ValueTypes. 15// 3. Cost thresholds for alternative implementations of certain operations. 16// 17// In addition it has a few other components, like information about FP 18// immediates. 19// 20//===----------------------------------------------------------------------===// 21 22#ifndef LLVM_TARGET_TARGETLOWERING_H 23#define LLVM_TARGET_TARGETLOWERING_H 24 25#include "llvm/Type.h" 26#include "llvm/CodeGen/ValueTypes.h" 27#include "llvm/Support/DataTypes.h" 28#include <vector> 29 30namespace llvm { 31 class Value; 32 class Function; 33 class TargetMachine; 34 class TargetData; 35 class TargetRegisterClass; 36 class SDNode; 37 class SDOperand; 38 class SelectionDAG; 39 class MachineBasicBlock; 40 class MachineInstr; 41 42//===----------------------------------------------------------------------===// 43/// TargetLowering - This class defines information used to lower LLVM code to 44/// legal SelectionDAG operators that the target instruction selector can accept 45/// natively. 46/// 47/// This class also defines callbacks that targets must implement to lower 48/// target-specific constructs to SelectionDAG operators. 49/// 50class TargetLowering { 51public: 52 /// LegalizeAction - This enum indicates whether operations are valid for a 53 /// target, and if not, what action should be used to make them valid. 54 enum LegalizeAction { 55 Legal, // The target natively supports this operation. 56 Promote, // This operation should be executed in a larger type. 57 Expand, // Try to expand this to other ops, otherwise use a libcall. 58 Custom, // Use the LowerOperation hook to implement custom lowering. 59 }; 60 61 enum OutOfRangeShiftAmount { 62 Undefined, // Oversized shift amounts are undefined (default). 63 Mask, // Shift amounts are auto masked (anded) to value size. 64 Extend, // Oversized shift pulls in zeros or sign bits. 65 }; 66 67 enum SetCCResultValue { 68 UndefinedSetCCResult, // SetCC returns a garbage/unknown extend. 69 ZeroOrOneSetCCResult, // SetCC returns a zero extended result. 70 ZeroOrNegativeOneSetCCResult, // SetCC returns a sign extended result. 71 }; 72 73 TargetLowering(TargetMachine &TM); 74 virtual ~TargetLowering(); 75 76 TargetMachine &getTargetMachine() const { return TM; } 77 const TargetData &getTargetData() const { return TD; } 78 79 bool isLittleEndian() const { return IsLittleEndian; } 80 MVT::ValueType getPointerTy() const { return PointerTy; } 81 MVT::ValueType getShiftAmountTy() const { return ShiftAmountTy; } 82 OutOfRangeShiftAmount getShiftAmountFlavor() const {return ShiftAmtHandling; } 83 84 /// isSetCCExpensive - Return true if the setcc operation is expensive for 85 /// this target. 86 bool isSetCCExpensive() const { return SetCCIsExpensive; } 87 88 /// isIntDivCheap() - Return true if integer divide is usually cheaper than 89 /// a sequence of several shifts, adds, and multiplies for this target. 90 bool isIntDivCheap() const { return IntDivIsCheap; } 91 92 /// isPow2DivCheap() - Return true if pow2 div is cheaper than a chain of 93 /// srl/add/sra. 94 bool isPow2DivCheap() const { return Pow2DivIsCheap; } 95 96 /// getSetCCResultTy - Return the ValueType of the result of setcc operations. 97 /// 98 MVT::ValueType getSetCCResultTy() const { return SetCCResultTy; } 99 100 /// getSetCCResultContents - For targets without boolean registers, this flag 101 /// returns information about the contents of the high-bits in the setcc 102 /// result register. 103 SetCCResultValue getSetCCResultContents() const { return SetCCResultContents;} 104 105 /// getRegClassFor - Return the register class that should be used for the 106 /// specified value type. This may only be called on legal types. 107 TargetRegisterClass *getRegClassFor(MVT::ValueType VT) const { 108 TargetRegisterClass *RC = RegClassForVT[VT]; 109 assert(RC && "This value type is not natively supported!"); 110 return RC; 111 } 112 113 /// isTypeLegal - Return true if the target has native support for the 114 /// specified value type. This means that it has a register that directly 115 /// holds it without promotions or expansions. 116 bool isTypeLegal(MVT::ValueType VT) const { 117 return RegClassForVT[VT] != 0; 118 } 119 120 /// getTypeAction - Return how we should legalize values of this type, either 121 /// it is already legal (return 'Legal') or we need to promote it to a larger 122 /// type (return 'Promote'), or we need to expand it into multiple registers 123 /// of smaller integer type (return 'Expand'). 'Custom' is not an option. 124 LegalizeAction getTypeAction(MVT::ValueType VT) const { 125 return (LegalizeAction)((ValueTypeActions >> (2*VT)) & 3); 126 } 127 unsigned long long getValueTypeActions() const { return ValueTypeActions; } 128 129 /// getTypeToTransformTo - For types supported by the target, this is an 130 /// identity function. For types that must be promoted to larger types, this 131 /// returns the larger type to promote to. For types that are larger than the 132 /// largest integer register, this contains one step in the expansion to get 133 /// to the smaller register. 134 MVT::ValueType getTypeToTransformTo(MVT::ValueType VT) const { 135 return TransformToType[VT]; 136 } 137 138 typedef std::vector<double>::const_iterator legal_fpimm_iterator; 139 legal_fpimm_iterator legal_fpimm_begin() const { 140 return LegalFPImmediates.begin(); 141 } 142 legal_fpimm_iterator legal_fpimm_end() const { 143 return LegalFPImmediates.end(); 144 } 145 146 /// getOperationAction - Return how this operation should be treated: either 147 /// it is legal, needs to be promoted to a larger size, needs to be 148 /// expanded to some other code sequence, or the target has a custom expander 149 /// for it. 150 LegalizeAction getOperationAction(unsigned Op, MVT::ValueType VT) const { 151 return (LegalizeAction)((OpActions[Op] >> (2*VT)) & 3); 152 } 153 154 /// isOperationLegal - Return true if the specified operation is legal on this 155 /// target. 156 bool isOperationLegal(unsigned Op, MVT::ValueType VT) const { 157 return getOperationAction(Op, VT) == Legal; 158 } 159 160 /// getTypeToPromoteTo - If the action for this operation is to promote, this 161 /// method returns the ValueType to promote to. 162 MVT::ValueType getTypeToPromoteTo(unsigned Op, MVT::ValueType VT) const { 163 assert(getOperationAction(Op, VT) == Promote && 164 "This operation isn't promoted!"); 165 MVT::ValueType NVT = VT; 166 do { 167 NVT = (MVT::ValueType)(NVT+1); 168 assert(MVT::isInteger(NVT) == MVT::isInteger(VT) && NVT != MVT::isVoid && 169 "Didn't find type to promote to!"); 170 } while (!isTypeLegal(NVT) || 171 getOperationAction(Op, NVT) == Promote); 172 return NVT; 173 } 174 175 /// getValueType - Return the MVT::ValueType corresponding to this LLVM type. 176 /// This is fixed by the LLVM operations except for the pointer size. 177 MVT::ValueType getValueType(const Type *Ty) const { 178 switch (Ty->getTypeID()) { 179 default: assert(0 && "Unknown type!"); 180 case Type::VoidTyID: return MVT::isVoid; 181 case Type::BoolTyID: return MVT::i1; 182 case Type::UByteTyID: 183 case Type::SByteTyID: return MVT::i8; 184 case Type::ShortTyID: 185 case Type::UShortTyID: return MVT::i16; 186 case Type::IntTyID: 187 case Type::UIntTyID: return MVT::i32; 188 case Type::LongTyID: 189 case Type::ULongTyID: return MVT::i64; 190 case Type::FloatTyID: return MVT::f32; 191 case Type::DoubleTyID: return MVT::f64; 192 case Type::PointerTyID: return PointerTy; 193 case Type::PackedTyID: return MVT::Vector; 194 } 195 } 196 197 /// getNumElements - Return the number of registers that this ValueType will 198 /// eventually require. This is always one for all non-integer types, is 199 /// one for any types promoted to live in larger registers, but may be more 200 /// than one for types (like i64) that are split into pieces. 201 unsigned getNumElements(MVT::ValueType VT) const { 202 return NumElementsForVT[VT]; 203 } 204 205 /// This function returns the maximum number of store operations permitted 206 /// to replace a call to llvm.memset. The value is set by the target at the 207 /// performance threshold for such a replacement. 208 /// @brief Get maximum # of store operations permitted for llvm.memset 209 unsigned getMaxStoresPerMemSet() const { return maxStoresPerMemSet; } 210 211 /// This function returns the maximum number of store operations permitted 212 /// to replace a call to llvm.memcpy. The value is set by the target at the 213 /// performance threshold for such a replacement. 214 /// @brief Get maximum # of store operations permitted for llvm.memcpy 215 unsigned getMaxStoresPerMemCpy() const { return maxStoresPerMemCpy; } 216 217 /// This function returns the maximum number of store operations permitted 218 /// to replace a call to llvm.memmove. The value is set by the target at the 219 /// performance threshold for such a replacement. 220 /// @brief Get maximum # of store operations permitted for llvm.memmove 221 unsigned getMaxStoresPerMemMove() const { return maxStoresPerMemMove; } 222 223 /// This function returns true if the target allows unaligned memory accesses. 224 /// This is used, for example, in situations where an array copy/move/set is 225 /// converted to a sequence of store operations. It's use helps to ensure that 226 /// such replacements don't generate code that causes an alignment error 227 /// (trap) on the target machine. 228 /// @brief Determine if the target supports unaligned memory accesses. 229 bool allowsUnalignedMemoryAccesses() const 230 { return allowUnalignedMemoryAccesses; } 231 232 /// usesUnderscoreSetJmpLongJmp - Determine if we should use _setjmp or setjmp 233 /// to implement llvm.setjmp. 234 bool usesUnderscoreSetJmpLongJmp() const { 235 return UseUnderscoreSetJmpLongJmp; 236 } 237 238 /// getStackPointerRegisterToSaveRestore - If a physical register, this 239 /// specifies the register that llvm.savestack/llvm.restorestack should save 240 /// and restore. 241 unsigned getStackPointerRegisterToSaveRestore() const { 242 return StackPointerRegisterToSaveRestore; 243 } 244 245 //===--------------------------------------------------------------------===// 246 // TargetLowering Configuration Methods - These methods should be invoked by 247 // the derived class constructor to configure this object for the target. 248 // 249 250protected: 251 252 /// setShiftAmountType - Describe the type that should be used for shift 253 /// amounts. This type defaults to the pointer type. 254 void setShiftAmountType(MVT::ValueType VT) { ShiftAmountTy = VT; } 255 256 /// setSetCCResultType - Describe the type that shoudl be used as the result 257 /// of a setcc operation. This defaults to the pointer type. 258 void setSetCCResultType(MVT::ValueType VT) { SetCCResultTy = VT; } 259 260 /// setSetCCResultContents - Specify how the target extends the result of a 261 /// setcc operation in a register. 262 void setSetCCResultContents(SetCCResultValue Ty) { SetCCResultContents = Ty; } 263 264 /// setShiftAmountFlavor - Describe how the target handles out of range shift 265 /// amounts. 266 void setShiftAmountFlavor(OutOfRangeShiftAmount OORSA) { 267 ShiftAmtHandling = OORSA; 268 } 269 270 /// setUseUnderscoreSetJmpLongJmp - Indicate whether this target prefers to 271 /// use _setjmp and _longjmp to or implement llvm.setjmp/llvm.longjmp or 272 /// the non _ versions. Defaults to false. 273 void setUseUnderscoreSetJmpLongJmp(bool Val) { 274 UseUnderscoreSetJmpLongJmp = Val; 275 } 276 277 /// setStackPointerRegisterToSaveRestore - If set to a physical register, this 278 /// specifies the register that llvm.savestack/llvm.restorestack should save 279 /// and restore. 280 void setStackPointerRegisterToSaveRestore(unsigned R) { 281 StackPointerRegisterToSaveRestore = R; 282 } 283 284 /// setSetCCIxExpensive - This is a short term hack for targets that codegen 285 /// setcc as a conditional branch. This encourages the code generator to fold 286 /// setcc operations into other operations if possible. 287 void setSetCCIsExpensive() { SetCCIsExpensive = true; } 288 289 /// setIntDivIsCheap - Tells the code generator that integer divide is 290 /// expensive, and if possible, should be replaced by an alternate sequence 291 /// of instructions not containing an integer divide. 292 void setIntDivIsCheap(bool isCheap = true) { IntDivIsCheap = isCheap; } 293 294 /// setPow2DivIsCheap - Tells the code generator that it shouldn't generate 295 /// srl/add/sra for a signed divide by power of two, and let the target handle 296 /// it. 297 void setPow2DivIsCheap(bool isCheap = true) { Pow2DivIsCheap = isCheap; } 298 299 /// addRegisterClass - Add the specified register class as an available 300 /// regclass for the specified value type. This indicates the selector can 301 /// handle values of that class natively. 302 void addRegisterClass(MVT::ValueType VT, TargetRegisterClass *RC) { 303 AvailableRegClasses.push_back(std::make_pair(VT, RC)); 304 RegClassForVT[VT] = RC; 305 } 306 307 /// computeRegisterProperties - Once all of the register classes are added, 308 /// this allows us to compute derived properties we expose. 309 void computeRegisterProperties(); 310 311 /// setOperationAction - Indicate that the specified operation does not work 312 /// with the specified type and indicate what to do about it. 313 void setOperationAction(unsigned Op, MVT::ValueType VT, 314 LegalizeAction Action) { 315 assert(VT < 16 && Op < sizeof(OpActions)/sizeof(OpActions[0]) && 316 "Table isn't big enough!"); 317 OpActions[Op] |= Action << VT*2; 318 } 319 320 /// addLegalFPImmediate - Indicate that this target can instruction select 321 /// the specified FP immediate natively. 322 void addLegalFPImmediate(double Imm) { 323 LegalFPImmediates.push_back(Imm); 324 } 325 326public: 327 328 //===--------------------------------------------------------------------===// 329 // Lowering methods - These methods must be implemented by targets so that 330 // the SelectionDAGLowering code knows how to lower these. 331 // 332 333 /// LowerArguments - This hook must be implemented to indicate how we should 334 /// lower the arguments for the specified function, into the specified DAG. 335 virtual std::vector<SDOperand> 336 LowerArguments(Function &F, SelectionDAG &DAG) = 0; 337 338 /// LowerCallTo - This hook lowers an abstract call to a function into an 339 /// actual call. This returns a pair of operands. The first element is the 340 /// return value for the function (if RetTy is not VoidTy). The second 341 /// element is the outgoing token chain. 342 typedef std::vector<std::pair<SDOperand, const Type*> > ArgListTy; 343 virtual std::pair<SDOperand, SDOperand> 344 LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, 345 unsigned CallingConv, bool isTailCall, SDOperand Callee, 346 ArgListTy &Args, SelectionDAG &DAG) = 0; 347 348 /// LowerReturnTo - This hook lowers a return instruction into the appropriate 349 /// legal ISD::RET node for the target's current ABI. This method is optional 350 /// and is intended for targets that need non-standard behavior. 351 virtual SDOperand LowerReturnTo(SDOperand Chain, SDOperand Op, 352 SelectionDAG &DAG); 353 354 /// LowerVAStart - This lowers the llvm.va_start intrinsic. If not 355 /// implemented, this method prints a message and aborts. This method should 356 /// return the modified chain value. Note that VAListPtr* correspond to the 357 /// llvm.va_start operand. 358 virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP, 359 Value *VAListV, SelectionDAG &DAG); 360 361 /// LowerVAEnd - This lowers llvm.va_end and returns the resultant chain. If 362 /// not implemented, this defaults to a noop. 363 virtual SDOperand LowerVAEnd(SDOperand Chain, SDOperand LP, Value *LV, 364 SelectionDAG &DAG); 365 366 /// LowerVACopy - This lowers llvm.va_copy and returns the resultant chain. 367 /// If not implemented, this defaults to loading a pointer from the input and 368 /// storing it to the output. 369 virtual SDOperand LowerVACopy(SDOperand Chain, SDOperand SrcP, Value *SrcV, 370 SDOperand DestP, Value *DestV, 371 SelectionDAG &DAG); 372 373 /// LowerVAArg - This lowers the vaarg instruction. If not implemented, this 374 /// prints a message and aborts. 375 virtual std::pair<SDOperand,SDOperand> 376 LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV, 377 const Type *ArgTy, SelectionDAG &DAG); 378 379 /// LowerFrameReturnAddress - This hook lowers a call to llvm.returnaddress or 380 /// llvm.frameaddress (depending on the value of the first argument). The 381 /// return values are the result pointer and the resultant token chain. If 382 /// not implemented, both of these intrinsics will return null. 383 virtual std::pair<SDOperand, SDOperand> 384 LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth, 385 SelectionDAG &DAG); 386 387 /// LowerOperation - For operations that are unsupported by the target, and 388 /// which are registered to use 'custom' lowering. This callback is invoked. 389 /// If the target has no operations that require custom lowering, it need not 390 /// implement this. The default implementation of this aborts. 391 virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG); 392 393 /// getTargetNodeName() - This method returns the name of a target specific 394 /// DAG node. 395 virtual const char *getTargetNodeName(unsigned Opcode) const; 396 397 /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to 398 /// be zero. Op is expected to be a target specific node. Used by DAG 399 /// combiner. 400 virtual bool isMaskedValueZeroForTargetNode(const SDOperand &Op, 401 uint64_t Mask) const; 402 403 //===--------------------------------------------------------------------===// 404 // Scheduler hooks 405 // 406 407 // InsertAtEndOfBasicBlock - This method should be implemented by targets that 408 // mark instructions with the 'usesCustomDAGSchedInserter' flag. These 409 // instructions are special in various ways, which require special support to 410 // insert. The specified MachineInstr is created but not inserted into any 411 // basic blocks, and the scheduler passes ownership of it to this method. 412 virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI, 413 MachineBasicBlock *MBB); 414 415private: 416 TargetMachine &TM; 417 const TargetData &TD; 418 419 /// IsLittleEndian - True if this is a little endian target. 420 /// 421 bool IsLittleEndian; 422 423 /// PointerTy - The type to use for pointers, usually i32 or i64. 424 /// 425 MVT::ValueType PointerTy; 426 427 /// ShiftAmountTy - The type to use for shift amounts, usually i8 or whatever 428 /// PointerTy is. 429 MVT::ValueType ShiftAmountTy; 430 431 OutOfRangeShiftAmount ShiftAmtHandling; 432 433 /// SetCCIsExpensive - This is a short term hack for targets that codegen 434 /// setcc as a conditional branch. This encourages the code generator to fold 435 /// setcc operations into other operations if possible. 436 bool SetCCIsExpensive; 437 438 /// IntDivIsCheap - Tells the code generator not to expand integer divides by 439 /// constants into a sequence of muls, adds, and shifts. This is a hack until 440 /// a real cost model is in place. If we ever optimize for size, this will be 441 /// set to true unconditionally. 442 bool IntDivIsCheap; 443 444 /// Pow2DivIsCheap - Tells the code generator that it shouldn't generate 445 /// srl/add/sra for a signed divide by power of two, and let the target handle 446 /// it. 447 bool Pow2DivIsCheap; 448 449 /// SetCCResultTy - The type that SetCC operations use. This defaults to the 450 /// PointerTy. 451 MVT::ValueType SetCCResultTy; 452 453 /// SetCCResultContents - Information about the contents of the high-bits in 454 /// the result of a setcc comparison operation. 455 SetCCResultValue SetCCResultContents; 456 457 /// UseUnderscoreSetJmpLongJmp - This target prefers to use _setjmp and 458 /// _longjmp to implement llvm.setjmp/llvm.longjmp. Defaults to false. 459 bool UseUnderscoreSetJmpLongJmp; 460 461 /// StackPointerRegisterToSaveRestore - If set to a physical register, this 462 /// specifies the register that llvm.savestack/llvm.restorestack should save 463 /// and restore. 464 unsigned StackPointerRegisterToSaveRestore; 465 466 /// RegClassForVT - This indicates the default register class to use for 467 /// each ValueType the target supports natively. 468 TargetRegisterClass *RegClassForVT[MVT::LAST_VALUETYPE]; 469 unsigned char NumElementsForVT[MVT::LAST_VALUETYPE]; 470 471 /// ValueTypeActions - This is a bitvector that contains two bits for each 472 /// value type, where the two bits correspond to the LegalizeAction enum. 473 /// This can be queried with "getTypeAction(VT)". 474 unsigned long long ValueTypeActions; 475 476 /// TransformToType - For any value types we are promoting or expanding, this 477 /// contains the value type that we are changing to. For Expanded types, this 478 /// contains one step of the expand (e.g. i64 -> i32), even if there are 479 /// multiple steps required (e.g. i64 -> i16). For types natively supported 480 /// by the system, this holds the same type (e.g. i32 -> i32). 481 MVT::ValueType TransformToType[MVT::LAST_VALUETYPE]; 482 483 /// OpActions - For each operation and each value type, keep a LegalizeAction 484 /// that indicates how instruction selection should deal with the operation. 485 /// Most operations are Legal (aka, supported natively by the target), but 486 /// operations that are not should be described. Note that operations on 487 /// non-legal value types are not described here. 488 unsigned OpActions[128]; 489 490 std::vector<double> LegalFPImmediates; 491 492 std::vector<std::pair<MVT::ValueType, 493 TargetRegisterClass*> > AvailableRegClasses; 494 495protected: 496 /// When lowering %llvm.memset this field specifies the maximum number of 497 /// store operations that may be substituted for the call to memset. Targets 498 /// must set this value based on the cost threshold for that target. Targets 499 /// should assume that the memset will be done using as many of the largest 500 /// store operations first, followed by smaller ones, if necessary, per 501 /// alignment restrictions. For example, storing 9 bytes on a 32-bit machine 502 /// with 16-bit alignment would result in four 2-byte stores and one 1-byte 503 /// store. This only applies to setting a constant array of a constant size. 504 /// @brief Specify maximum number of store instructions per memset call. 505 unsigned maxStoresPerMemSet; 506 507 /// When lowering %llvm.memcpy this field specifies the maximum number of 508 /// store operations that may be substituted for a call to memcpy. Targets 509 /// must set this value based on the cost threshold for that target. Targets 510 /// should assume that the memcpy will be done using as many of the largest 511 /// store operations first, followed by smaller ones, if necessary, per 512 /// alignment restrictions. For example, storing 7 bytes on a 32-bit machine 513 /// with 32-bit alignment would result in one 4-byte store, a one 2-byte store 514 /// and one 1-byte store. This only applies to copying a constant array of 515 /// constant size. 516 /// @brief Specify maximum bytes of store instructions per memcpy call. 517 unsigned maxStoresPerMemCpy; 518 519 /// When lowering %llvm.memmove this field specifies the maximum number of 520 /// store instructions that may be substituted for a call to memmove. Targets 521 /// must set this value based on the cost threshold for that target. Targets 522 /// should assume that the memmove will be done using as many of the largest 523 /// store operations first, followed by smaller ones, if necessary, per 524 /// alignment restrictions. For example, moving 9 bytes on a 32-bit machine 525 /// with 8-bit alignment would result in nine 1-byte stores. This only 526 /// applies to copying a constant array of constant size. 527 /// @brief Specify maximum bytes of store instructions per memmove call. 528 unsigned maxStoresPerMemMove; 529 530 /// This field specifies whether the target machine permits unaligned memory 531 /// accesses. This is used, for example, to determine the size of store 532 /// operations when copying small arrays and other similar tasks. 533 /// @brief Indicate whether the target permits unaligned memory accesses. 534 bool allowUnalignedMemoryAccesses; 535}; 536} // end llvm namespace 537 538#endif 539