1 //===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- 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 defines the set of low-level target independent types which various 11 // values in the code generator are. This allows the target specific behavior 12 // of instructions to be described to target independent passes. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CODEGEN_VALUETYPES_H 17 #define LLVM_CODEGEN_VALUETYPES_H 18 19 #include "llvm/Support/DataTypes.h" 20 #include "llvm/Support/ErrorHandling.h" 21 #include "llvm/Support/MathExtras.h" 22 #include <cassert> 23 #include <string> 24 25 namespace llvm { 26 class Type; 27 class LLVMContext; 28 struct EVT; 29 30 /// MVT - Machine Value Type. Every type that is supported natively by some 31 /// processor targeted by LLVM occurs here. This means that any legal value 32 /// type can be represented by a MVT. 33 class MVT { 34 public: 35 enum SimpleValueType { 36 // If you change this numbering, you must change the values in 37 // ValueTypes.td as well! 38 Other = 0, // This is a non-standard value 39 i1 = 1, // This is a 1 bit integer value 40 i8 = 2, // This is an 8 bit integer value 41 i16 = 3, // This is a 16 bit integer value 42 i32 = 4, // This is a 32 bit integer value 43 i64 = 5, // This is a 64 bit integer value 44 i128 = 6, // This is a 128 bit integer value 45 46 FIRST_INTEGER_VALUETYPE = i1, 47 LAST_INTEGER_VALUETYPE = i128, 48 49 f16 = 7, // This is a 16 bit floating point value 50 f32 = 8, // This is a 32 bit floating point value 51 f64 = 9, // This is a 64 bit floating point value 52 f80 = 10, // This is a 80 bit floating point value 53 f128 = 11, // This is a 128 bit floating point value 54 ppcf128 = 12, // This is a PPC 128-bit floating point value 55 56 FIRST_FP_VALUETYPE = f16, 57 LAST_FP_VALUETYPE = ppcf128, 58 59 v2i8 = 13, // 2 x i8 60 v4i8 = 14, // 4 x i8 61 v8i8 = 15, // 8 x i8 62 v16i8 = 16, // 16 x i8 63 v32i8 = 17, // 32 x i8 64 v2i16 = 18, // 2 x i16 65 v4i16 = 19, // 4 x i16 66 v8i16 = 20, // 8 x i16 67 v16i16 = 21, // 16 x i16 68 v2i32 = 22, // 2 x i32 69 v4i32 = 23, // 4 x i32 70 v8i32 = 24, // 8 x i32 71 v16i32 = 25, // 16 x i32 72 v1i64 = 26, // 1 x i64 73 v2i64 = 27, // 2 x i64 74 v4i64 = 28, // 4 x i64 75 v8i64 = 29, // 8 x i64 76 v16i64 = 30, // 16 x i64 77 78 v2f16 = 31, // 2 x f16 79 v2f32 = 32, // 2 x f32 80 v4f32 = 33, // 4 x f32 81 v8f32 = 34, // 8 x f32 82 v2f64 = 35, // 2 x f64 83 v4f64 = 36, // 4 x f64 84 85 FIRST_VECTOR_VALUETYPE = v2i8, 86 LAST_VECTOR_VALUETYPE = v4f64, 87 FIRST_INTEGER_VECTOR_VALUETYPE = v2i8, 88 LAST_INTEGER_VECTOR_VALUETYPE = v16i64, 89 FIRST_FP_VECTOR_VALUETYPE = v2f16, 90 LAST_FP_VECTOR_VALUETYPE = v4f64, 91 92 x86mmx = 37, // This is an X86 MMX value 93 94 Glue = 38, // This glues nodes together during pre-RA sched 95 96 isVoid = 39, // This has no value 97 98 Untyped = 40, // This value takes a register, but has 99 // unspecified type. The register class 100 // will be determined by the opcode. 101 102 LAST_VALUETYPE = 41, // This always remains at the end of the list. 103 104 // This is the current maximum for LAST_VALUETYPE. 105 // MVT::MAX_ALLOWED_VALUETYPE is used for asserts and to size bit vectors 106 // This value must be a multiple of 32. 107 MAX_ALLOWED_VALUETYPE = 64, 108 109 // Metadata - This is MDNode or MDString. 110 Metadata = 250, 111 112 // iPTRAny - An int value the size of the pointer of the current 113 // target to any address space. This must only be used internal to 114 // tblgen. Other than for overloading, we treat iPTRAny the same as iPTR. 115 iPTRAny = 251, 116 117 // vAny - A vector with any length and element size. This is used 118 // for intrinsics that have overloadings based on vector types. 119 // This is only for tblgen's consumption! 120 vAny = 252, 121 122 // fAny - Any floating-point or vector floating-point value. This is used 123 // for intrinsics that have overloadings based on floating-point types. 124 // This is only for tblgen's consumption! 125 fAny = 253, 126 127 // iAny - An integer or vector integer value of any bit width. This is 128 // used for intrinsics that have overloadings based on integer bit widths. 129 // This is only for tblgen's consumption! 130 iAny = 254, 131 132 // iPTR - An int value the size of the pointer of the current 133 // target. This should only be used internal to tblgen! 134 iPTR = 255, 135 136 // LastSimpleValueType - The greatest valid SimpleValueType value. 137 LastSimpleValueType = 255, 138 139 // INVALID_SIMPLE_VALUE_TYPE - Simple value types greater than or equal 140 // to this are considered extended value types. 141 INVALID_SIMPLE_VALUE_TYPE = LastSimpleValueType + 1 142 }; 143 144 SimpleValueType SimpleTy; 145 MVT()146 MVT() : SimpleTy((SimpleValueType)(INVALID_SIMPLE_VALUE_TYPE)) {} MVT(SimpleValueType SVT)147 MVT(SimpleValueType SVT) : SimpleTy(SVT) { } 148 149 bool operator>(const MVT& S) const { return SimpleTy > S.SimpleTy; } 150 bool operator<(const MVT& S) const { return SimpleTy < S.SimpleTy; } 151 bool operator==(const MVT& S) const { return SimpleTy == S.SimpleTy; } 152 bool operator!=(const MVT& S) const { return SimpleTy != S.SimpleTy; } 153 bool operator>=(const MVT& S) const { return SimpleTy >= S.SimpleTy; } 154 bool operator<=(const MVT& S) const { return SimpleTy <= S.SimpleTy; } 155 156 /// isFloatingPoint - Return true if this is a FP, or a vector FP type. isFloatingPoint()157 bool isFloatingPoint() const { 158 return ((SimpleTy >= MVT::FIRST_FP_VALUETYPE && 159 SimpleTy <= MVT::LAST_FP_VALUETYPE) || 160 (SimpleTy >= MVT::FIRST_FP_VECTOR_VALUETYPE && 161 SimpleTy <= MVT::LAST_FP_VECTOR_VALUETYPE)); 162 } 163 164 /// isInteger - Return true if this is an integer, or a vector integer type. isInteger()165 bool isInteger() const { 166 return ((SimpleTy >= MVT::FIRST_INTEGER_VALUETYPE && 167 SimpleTy <= MVT::LAST_INTEGER_VALUETYPE) || 168 (SimpleTy >= MVT::FIRST_INTEGER_VECTOR_VALUETYPE && 169 SimpleTy <= MVT::LAST_INTEGER_VECTOR_VALUETYPE)); 170 } 171 172 /// isVector - Return true if this is a vector value type. isVector()173 bool isVector() const { 174 return (SimpleTy >= MVT::FIRST_VECTOR_VALUETYPE && 175 SimpleTy <= MVT::LAST_VECTOR_VALUETYPE); 176 } 177 178 /// is64BitVector - Return true if this is a 64-bit vector type. is64BitVector()179 bool is64BitVector() const { 180 return (SimpleTy == MVT::v8i8 || SimpleTy == MVT::v4i16 || 181 SimpleTy == MVT::v2i32 || SimpleTy == MVT::v1i64 || 182 SimpleTy == MVT::v2f32); 183 } 184 185 /// is128BitVector - Return true if this is a 128-bit vector type. is128BitVector()186 bool is128BitVector() const { 187 return (SimpleTy == MVT::v16i8 || SimpleTy == MVT::v8i16 || 188 SimpleTy == MVT::v4i32 || SimpleTy == MVT::v2i64 || 189 SimpleTy == MVT::v4f32 || SimpleTy == MVT::v2f64); 190 } 191 192 /// is256BitVector - Return true if this is a 256-bit vector type. is256BitVector()193 bool is256BitVector() const { 194 return (SimpleTy == MVT::v8f32 || SimpleTy == MVT::v4f64 || 195 SimpleTy == MVT::v32i8 || SimpleTy == MVT::v16i16 || 196 SimpleTy == MVT::v8i32 || SimpleTy == MVT::v4i64); 197 } 198 199 /// is512BitVector - Return true if this is a 512-bit vector type. is512BitVector()200 bool is512BitVector() const { 201 return (SimpleTy == MVT::v8i64 || SimpleTy == MVT::v16i32); 202 } 203 204 /// is1024BitVector - Return true if this is a 1024-bit vector type. is1024BitVector()205 bool is1024BitVector() const { 206 return (SimpleTy == MVT::v16i64); 207 } 208 209 /// isPow2VectorType - Returns true if the given vector is a power of 2. isPow2VectorType()210 bool isPow2VectorType() const { 211 unsigned NElts = getVectorNumElements(); 212 return !(NElts & (NElts - 1)); 213 } 214 215 /// getPow2VectorType - Widens the length of the given vector MVT up to 216 /// the nearest power of 2 and returns that type. getPow2VectorType()217 MVT getPow2VectorType() const { 218 if (isPow2VectorType()) 219 return *this; 220 221 unsigned NElts = getVectorNumElements(); 222 unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts); 223 return MVT::getVectorVT(getVectorElementType(), Pow2NElts); 224 } 225 226 /// getScalarType - If this is a vector type, return the element type, 227 /// otherwise return this. getScalarType()228 MVT getScalarType() const { 229 return isVector() ? getVectorElementType() : *this; 230 } 231 getVectorElementType()232 MVT getVectorElementType() const { 233 switch (SimpleTy) { 234 default: 235 llvm_unreachable("Not a vector MVT!"); 236 case v2i8 : 237 case v4i8 : 238 case v8i8 : 239 case v16i8: 240 case v32i8: return i8; 241 case v2i16: 242 case v4i16: 243 case v8i16: 244 case v16i16: return i16; 245 case v2i32: 246 case v4i32: 247 case v8i32: 248 case v16i32: return i32; 249 case v1i64: 250 case v2i64: 251 case v4i64: 252 case v8i64: 253 case v16i64: return i64; 254 case v2f16: return f16; 255 case v2f32: 256 case v4f32: 257 case v8f32: return f32; 258 case v2f64: 259 case v4f64: return f64; 260 } 261 } 262 getVectorNumElements()263 unsigned getVectorNumElements() const { 264 switch (SimpleTy) { 265 default: 266 llvm_unreachable("Not a vector MVT!"); 267 case v32i8: return 32; 268 case v16i8: 269 case v16i16: 270 case v16i32: 271 case v16i64:return 16; 272 case v8i8 : 273 case v8i16: 274 case v8i32: 275 case v8i64: 276 case v8f32: return 8; 277 case v4i8: 278 case v4i16: 279 case v4i32: 280 case v4i64: 281 case v4f32: 282 case v4f64: return 4; 283 case v2i8: 284 case v2i16: 285 case v2i32: 286 case v2i64: 287 case v2f16: 288 case v2f32: 289 case v2f64: return 2; 290 case v1i64: return 1; 291 } 292 } 293 getSizeInBits()294 unsigned getSizeInBits() const { 295 switch (SimpleTy) { 296 case iPTR: 297 llvm_unreachable("Value type size is target-dependent. Ask TLI."); 298 case iPTRAny: 299 case iAny: 300 case fAny: 301 llvm_unreachable("Value type is overloaded."); 302 default: 303 llvm_unreachable("getSizeInBits called on extended MVT."); 304 case i1 : return 1; 305 case i8 : return 8; 306 case i16 : 307 case f16: 308 case v2i8: return 16; 309 case f32 : 310 case i32 : 311 case v4i8: 312 case v2i16: 313 case v2f16: return 32; 314 case x86mmx: 315 case f64 : 316 case i64 : 317 case v8i8: 318 case v4i16: 319 case v2i32: 320 case v1i64: 321 case v2f32: return 64; 322 case f80 : return 80; 323 case f128: 324 case ppcf128: 325 case i128: 326 case v16i8: 327 case v8i16: 328 case v4i32: 329 case v2i64: 330 case v4f32: 331 case v2f64: return 128; 332 case v32i8: 333 case v16i16: 334 case v8i32: 335 case v4i64: 336 case v8f32: 337 case v4f64: return 256; 338 case v16i32: 339 case v8i64: return 512; 340 case v16i64:return 1024; 341 } 342 } 343 344 /// getStoreSize - Return the number of bytes overwritten by a store 345 /// of the specified value type. getStoreSize()346 unsigned getStoreSize() const { 347 return (getSizeInBits() + 7) / 8; 348 } 349 350 /// getStoreSizeInBits - Return the number of bits overwritten by a store 351 /// of the specified value type. getStoreSizeInBits()352 unsigned getStoreSizeInBits() const { 353 return getStoreSize() * 8; 354 } 355 getFloatingPointVT(unsigned BitWidth)356 static MVT getFloatingPointVT(unsigned BitWidth) { 357 switch (BitWidth) { 358 default: 359 llvm_unreachable("Bad bit width!"); 360 case 16: 361 return MVT::f16; 362 case 32: 363 return MVT::f32; 364 case 64: 365 return MVT::f64; 366 case 80: 367 return MVT::f80; 368 case 128: 369 return MVT::f128; 370 } 371 } 372 getIntegerVT(unsigned BitWidth)373 static MVT getIntegerVT(unsigned BitWidth) { 374 switch (BitWidth) { 375 default: 376 return (MVT::SimpleValueType)(MVT::INVALID_SIMPLE_VALUE_TYPE); 377 case 1: 378 return MVT::i1; 379 case 8: 380 return MVT::i8; 381 case 16: 382 return MVT::i16; 383 case 32: 384 return MVT::i32; 385 case 64: 386 return MVT::i64; 387 case 128: 388 return MVT::i128; 389 } 390 } 391 getVectorVT(MVT VT,unsigned NumElements)392 static MVT getVectorVT(MVT VT, unsigned NumElements) { 393 switch (VT.SimpleTy) { 394 default: 395 break; 396 case MVT::i8: 397 if (NumElements == 2) return MVT::v2i8; 398 if (NumElements == 4) return MVT::v4i8; 399 if (NumElements == 8) return MVT::v8i8; 400 if (NumElements == 16) return MVT::v16i8; 401 if (NumElements == 32) return MVT::v32i8; 402 break; 403 case MVT::i16: 404 if (NumElements == 2) return MVT::v2i16; 405 if (NumElements == 4) return MVT::v4i16; 406 if (NumElements == 8) return MVT::v8i16; 407 if (NumElements == 16) return MVT::v16i16; 408 break; 409 case MVT::i32: 410 if (NumElements == 2) return MVT::v2i32; 411 if (NumElements == 4) return MVT::v4i32; 412 if (NumElements == 8) return MVT::v8i32; 413 if (NumElements == 16) return MVT::v16i32; 414 break; 415 case MVT::i64: 416 if (NumElements == 1) return MVT::v1i64; 417 if (NumElements == 2) return MVT::v2i64; 418 if (NumElements == 4) return MVT::v4i64; 419 if (NumElements == 8) return MVT::v8i64; 420 if (NumElements == 16) return MVT::v16i64; 421 break; 422 case MVT::f16: 423 if (NumElements == 2) return MVT::v2f16; 424 break; 425 case MVT::f32: 426 if (NumElements == 2) return MVT::v2f32; 427 if (NumElements == 4) return MVT::v4f32; 428 if (NumElements == 8) return MVT::v8f32; 429 break; 430 case MVT::f64: 431 if (NumElements == 2) return MVT::v2f64; 432 if (NumElements == 4) return MVT::v4f64; 433 break; 434 } 435 return (MVT::SimpleValueType)(MVT::INVALID_SIMPLE_VALUE_TYPE); 436 } 437 }; 438 439 440 /// EVT - Extended Value Type. Capable of holding value types which are not 441 /// native for any processor (such as the i12345 type), as well as the types 442 /// a MVT can represent. 443 struct EVT { 444 private: 445 MVT V; 446 Type *LLVMTy; 447 448 public: EVTEVT449 EVT() : V((MVT::SimpleValueType)(MVT::INVALID_SIMPLE_VALUE_TYPE)), 450 LLVMTy(0) {} EVTEVT451 EVT(MVT::SimpleValueType SVT) : V(SVT), LLVMTy(0) { } EVTEVT452 EVT(MVT S) : V(S), LLVMTy(0) {} 453 454 bool operator==(EVT VT) const { 455 return !(*this != VT); 456 } 457 bool operator!=(EVT VT) const { 458 if (V.SimpleTy != VT.V.SimpleTy) 459 return true; 460 if (V.SimpleTy == MVT::INVALID_SIMPLE_VALUE_TYPE) 461 return LLVMTy != VT.LLVMTy; 462 return false; 463 } 464 465 /// getFloatingPointVT - Returns the EVT that represents a floating point 466 /// type with the given number of bits. There are two floating point types 467 /// with 128 bits - this returns f128 rather than ppcf128. getFloatingPointVTEVT468 static EVT getFloatingPointVT(unsigned BitWidth) { 469 return MVT::getFloatingPointVT(BitWidth); 470 } 471 472 /// getIntegerVT - Returns the EVT that represents an integer with the given 473 /// number of bits. getIntegerVTEVT474 static EVT getIntegerVT(LLVMContext &Context, unsigned BitWidth) { 475 MVT M = MVT::getIntegerVT(BitWidth); 476 if (M.SimpleTy != MVT::INVALID_SIMPLE_VALUE_TYPE) 477 return M; 478 return getExtendedIntegerVT(Context, BitWidth); 479 } 480 481 /// getVectorVT - Returns the EVT that represents a vector NumElements in 482 /// length, where each element is of type VT. getVectorVTEVT483 static EVT getVectorVT(LLVMContext &Context, EVT VT, unsigned NumElements) { 484 MVT M = MVT::getVectorVT(VT.V, NumElements); 485 if (M.SimpleTy != MVT::INVALID_SIMPLE_VALUE_TYPE) 486 return M; 487 return getExtendedVectorVT(Context, VT, NumElements); 488 } 489 490 /// changeVectorElementTypeToInteger - Return a vector with the same number 491 /// of elements as this vector, but with the element type converted to an 492 /// integer type with the same bitwidth. changeVectorElementTypeToIntegerEVT493 EVT changeVectorElementTypeToInteger() const { 494 if (!isSimple()) 495 return changeExtendedVectorElementTypeToInteger(); 496 MVT EltTy = getSimpleVT().getVectorElementType(); 497 unsigned BitWidth = EltTy.getSizeInBits(); 498 MVT IntTy = MVT::getIntegerVT(BitWidth); 499 MVT VecTy = MVT::getVectorVT(IntTy, getVectorNumElements()); 500 assert(VecTy != MVT::INVALID_SIMPLE_VALUE_TYPE && 501 "Simple vector VT not representable by simple integer vector VT!"); 502 return VecTy; 503 } 504 505 /// isSimple - Test if the given EVT is simple (as opposed to being 506 /// extended). isSimpleEVT507 bool isSimple() const { 508 return V.SimpleTy <= MVT::LastSimpleValueType; 509 } 510 511 /// isExtended - Test if the given EVT is extended (as opposed to 512 /// being simple). isExtendedEVT513 bool isExtended() const { 514 return !isSimple(); 515 } 516 517 /// isFloatingPoint - Return true if this is a FP, or a vector FP type. isFloatingPointEVT518 bool isFloatingPoint() const { 519 return isSimple() ? V.isFloatingPoint() : isExtendedFloatingPoint(); 520 } 521 522 /// isInteger - Return true if this is an integer, or a vector integer type. isIntegerEVT523 bool isInteger() const { 524 return isSimple() ? V.isInteger() : isExtendedInteger(); 525 } 526 527 /// isVector - Return true if this is a vector value type. isVectorEVT528 bool isVector() const { 529 return isSimple() ? V.isVector() : isExtendedVector(); 530 } 531 532 /// is64BitVector - Return true if this is a 64-bit vector type. is64BitVectorEVT533 bool is64BitVector() const { 534 return isSimple() ? V.is64BitVector() : isExtended64BitVector(); 535 } 536 537 /// is128BitVector - Return true if this is a 128-bit vector type. is128BitVectorEVT538 bool is128BitVector() const { 539 return isSimple() ? V.is128BitVector() : isExtended128BitVector(); 540 } 541 542 /// is256BitVector - Return true if this is a 256-bit vector type. is256BitVectorEVT543 bool is256BitVector() const { 544 return isSimple() ? V.is256BitVector() : isExtended256BitVector(); 545 } 546 547 /// is512BitVector - Return true if this is a 512-bit vector type. is512BitVectorEVT548 bool is512BitVector() const { 549 return isSimple() ? V.is512BitVector() : isExtended512BitVector(); 550 } 551 552 /// is1024BitVector - Return true if this is a 1024-bit vector type. is1024BitVectorEVT553 bool is1024BitVector() const { 554 return isSimple() ? V.is1024BitVector() : isExtended1024BitVector(); 555 } 556 557 /// isOverloaded - Return true if this is an overloaded type for TableGen. isOverloadedEVT558 bool isOverloaded() const { 559 return (V==MVT::iAny || V==MVT::fAny || V==MVT::vAny || V==MVT::iPTRAny); 560 } 561 562 /// isByteSized - Return true if the bit size is a multiple of 8. isByteSizedEVT563 bool isByteSized() const { 564 return (getSizeInBits() & 7) == 0; 565 } 566 567 /// isRound - Return true if the size is a power-of-two number of bytes. isRoundEVT568 bool isRound() const { 569 unsigned BitSize = getSizeInBits(); 570 return BitSize >= 8 && !(BitSize & (BitSize - 1)); 571 } 572 573 /// bitsEq - Return true if this has the same number of bits as VT. bitsEqEVT574 bool bitsEq(EVT VT) const { 575 if (EVT::operator==(VT)) return true; 576 return getSizeInBits() == VT.getSizeInBits(); 577 } 578 579 /// bitsGT - Return true if this has more bits than VT. bitsGTEVT580 bool bitsGT(EVT VT) const { 581 if (EVT::operator==(VT)) return false; 582 return getSizeInBits() > VT.getSizeInBits(); 583 } 584 585 /// bitsGE - Return true if this has no less bits than VT. bitsGEEVT586 bool bitsGE(EVT VT) const { 587 if (EVT::operator==(VT)) return true; 588 return getSizeInBits() >= VT.getSizeInBits(); 589 } 590 591 /// bitsLT - Return true if this has less bits than VT. bitsLTEVT592 bool bitsLT(EVT VT) const { 593 if (EVT::operator==(VT)) return false; 594 return getSizeInBits() < VT.getSizeInBits(); 595 } 596 597 /// bitsLE - Return true if this has no more bits than VT. bitsLEEVT598 bool bitsLE(EVT VT) const { 599 if (EVT::operator==(VT)) return true; 600 return getSizeInBits() <= VT.getSizeInBits(); 601 } 602 603 604 /// getSimpleVT - Return the SimpleValueType held in the specified 605 /// simple EVT. getSimpleVTEVT606 MVT getSimpleVT() const { 607 assert(isSimple() && "Expected a SimpleValueType!"); 608 return V; 609 } 610 611 /// getScalarType - If this is a vector type, return the element type, 612 /// otherwise return this. getScalarTypeEVT613 EVT getScalarType() const { 614 return isVector() ? getVectorElementType() : *this; 615 } 616 617 /// getVectorElementType - Given a vector type, return the type of 618 /// each element. getVectorElementTypeEVT619 EVT getVectorElementType() const { 620 assert(isVector() && "Invalid vector type!"); 621 if (isSimple()) 622 return V.getVectorElementType(); 623 return getExtendedVectorElementType(); 624 } 625 626 /// getVectorNumElements - Given a vector type, return the number of 627 /// elements it contains. getVectorNumElementsEVT628 unsigned getVectorNumElements() const { 629 assert(isVector() && "Invalid vector type!"); 630 if (isSimple()) 631 return V.getVectorNumElements(); 632 return getExtendedVectorNumElements(); 633 } 634 635 /// getSizeInBits - Return the size of the specified value type in bits. getSizeInBitsEVT636 unsigned getSizeInBits() const { 637 if (isSimple()) 638 return V.getSizeInBits(); 639 return getExtendedSizeInBits(); 640 } 641 642 /// getStoreSize - Return the number of bytes overwritten by a store 643 /// of the specified value type. getStoreSizeEVT644 unsigned getStoreSize() const { 645 return (getSizeInBits() + 7) / 8; 646 } 647 648 /// getStoreSizeInBits - Return the number of bits overwritten by a store 649 /// of the specified value type. getStoreSizeInBitsEVT650 unsigned getStoreSizeInBits() const { 651 return getStoreSize() * 8; 652 } 653 654 /// getRoundIntegerType - Rounds the bit-width of the given integer EVT up 655 /// to the nearest power of two (and at least to eight), and returns the 656 /// integer EVT with that number of bits. getRoundIntegerTypeEVT657 EVT getRoundIntegerType(LLVMContext &Context) const { 658 assert(isInteger() && !isVector() && "Invalid integer type!"); 659 unsigned BitWidth = getSizeInBits(); 660 if (BitWidth <= 8) 661 return EVT(MVT::i8); 662 return getIntegerVT(Context, 1 << Log2_32_Ceil(BitWidth)); 663 } 664 665 /// getHalfSizedIntegerVT - Finds the smallest simple value type that is 666 /// greater than or equal to half the width of this EVT. If no simple 667 /// value type can be found, an extended integer value type of half the 668 /// size (rounded up) is returned. getHalfSizedIntegerVTEVT669 EVT getHalfSizedIntegerVT(LLVMContext &Context) const { 670 assert(isInteger() && !isVector() && "Invalid integer type!"); 671 unsigned EVTSize = getSizeInBits(); 672 for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE; 673 IntVT <= MVT::LAST_INTEGER_VALUETYPE; ++IntVT) { 674 EVT HalfVT = EVT((MVT::SimpleValueType)IntVT); 675 if (HalfVT.getSizeInBits() * 2 >= EVTSize) 676 return HalfVT; 677 } 678 return getIntegerVT(Context, (EVTSize + 1) / 2); 679 } 680 681 /// isPow2VectorType - Returns true if the given vector is a power of 2. isPow2VectorTypeEVT682 bool isPow2VectorType() const { 683 unsigned NElts = getVectorNumElements(); 684 return !(NElts & (NElts - 1)); 685 } 686 687 /// getPow2VectorType - Widens the length of the given vector EVT up to 688 /// the nearest power of 2 and returns that type. getPow2VectorTypeEVT689 EVT getPow2VectorType(LLVMContext &Context) const { 690 if (!isPow2VectorType()) { 691 unsigned NElts = getVectorNumElements(); 692 unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts); 693 return EVT::getVectorVT(Context, getVectorElementType(), Pow2NElts); 694 } 695 else { 696 return *this; 697 } 698 } 699 700 /// getEVTString - This function returns value type as a string, 701 /// e.g. "i32". 702 std::string getEVTString() const; 703 704 /// getTypeForEVT - This method returns an LLVM type corresponding to the 705 /// specified EVT. For integer types, this returns an unsigned type. Note 706 /// that this will abort for types that cannot be represented. 707 Type *getTypeForEVT(LLVMContext &Context) const; 708 709 /// getEVT - Return the value type corresponding to the specified type. 710 /// This returns all pointers as iPTR. If HandleUnknown is true, unknown 711 /// types are returned as Other, otherwise they are invalid. 712 static EVT getEVT(Type *Ty, bool HandleUnknown = false); 713 getRawBitsEVT714 intptr_t getRawBits() { 715 if (isSimple()) 716 return V.SimpleTy; 717 else 718 return (intptr_t)(LLVMTy); 719 } 720 721 /// compareRawBits - A meaningless but well-behaved order, useful for 722 /// constructing containers. 723 struct compareRawBits { operatorEVT::compareRawBits724 bool operator()(EVT L, EVT R) const { 725 if (L.V.SimpleTy == R.V.SimpleTy) 726 return L.LLVMTy < R.LLVMTy; 727 else 728 return L.V.SimpleTy < R.V.SimpleTy; 729 } 730 }; 731 732 private: 733 // Methods for handling the Extended-type case in functions above. 734 // These are all out-of-line to prevent users of this header file 735 // from having a dependency on Type.h. 736 EVT changeExtendedVectorElementTypeToInteger() const; 737 static EVT getExtendedIntegerVT(LLVMContext &C, unsigned BitWidth); 738 static EVT getExtendedVectorVT(LLVMContext &C, EVT VT, 739 unsigned NumElements); 740 bool isExtendedFloatingPoint() const; 741 bool isExtendedInteger() const; 742 bool isExtendedVector() const; 743 bool isExtended64BitVector() const; 744 bool isExtended128BitVector() const; 745 bool isExtended256BitVector() const; 746 bool isExtended512BitVector() const; 747 bool isExtended1024BitVector() const; 748 EVT getExtendedVectorElementType() const; 749 unsigned getExtendedVectorNumElements() const; 750 unsigned getExtendedSizeInBits() const; 751 }; 752 753 } // End llvm namespace 754 755 #endif 756