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/CodeGen/MachineValueType.h" 20 #include <cassert> 21 #include <string> 22 23 namespace llvm { 24 25 class LLVMContext; 26 class Type; 27 28 /// EVT - Extended Value Type. Capable of holding value types which are not 29 /// native for any processor (such as the i12345 type), as well as the types 30 /// a MVT can represent. 31 struct EVT { 32 private: 33 MVT V; 34 Type *LLVMTy; 35 36 public: 37 LLVM_CONSTEXPR EVT() : V(MVT::INVALID_SIMPLE_VALUE_TYPE), LLVMTy(nullptr) {} 38 LLVM_CONSTEXPR EVT(MVT::SimpleValueType SVT) : V(SVT), LLVMTy(nullptr) {} 39 LLVM_CONSTEXPR EVT(MVT S) : V(S), LLVMTy(nullptr) {} 40 41 bool operator==(EVT VT) const { 42 return !(*this != VT); 43 } 44 bool operator!=(EVT VT) const { 45 if (V.SimpleTy != VT.V.SimpleTy) 46 return true; 47 if (V.SimpleTy < 0) 48 return LLVMTy != VT.LLVMTy; 49 return false; 50 } 51 52 /// getFloatingPointVT - Returns the EVT that represents a floating point 53 /// type with the given number of bits. There are two floating point types 54 /// with 128 bits - this returns f128 rather than ppcf128. 55 static EVT getFloatingPointVT(unsigned BitWidth) { 56 return MVT::getFloatingPointVT(BitWidth); 57 } 58 59 /// getIntegerVT - Returns the EVT that represents an integer with the given 60 /// number of bits. 61 static EVT getIntegerVT(LLVMContext &Context, unsigned BitWidth) { 62 MVT M = MVT::getIntegerVT(BitWidth); 63 if (M.SimpleTy >= 0) 64 return M; 65 return getExtendedIntegerVT(Context, BitWidth); 66 } 67 68 /// getVectorVT - Returns the EVT that represents a vector NumElements in 69 /// length, where each element is of type VT. 70 static EVT getVectorVT(LLVMContext &Context, EVT VT, unsigned NumElements) { 71 MVT M = MVT::getVectorVT(VT.V, NumElements); 72 if (M.SimpleTy >= 0) 73 return M; 74 return getExtendedVectorVT(Context, VT, NumElements); 75 } 76 77 /// changeVectorElementTypeToInteger - Return a vector with the same number 78 /// of elements as this vector, but with the element type converted to an 79 /// integer type with the same bitwidth. 80 EVT changeVectorElementTypeToInteger() const { 81 if (!isSimple()) 82 return changeExtendedVectorElementTypeToInteger(); 83 MVT EltTy = getSimpleVT().getVectorElementType(); 84 unsigned BitWidth = EltTy.getSizeInBits(); 85 MVT IntTy = MVT::getIntegerVT(BitWidth); 86 MVT VecTy = MVT::getVectorVT(IntTy, getVectorNumElements()); 87 assert(VecTy.SimpleTy >= 0 && 88 "Simple vector VT not representable by simple integer vector VT!"); 89 return VecTy; 90 } 91 92 /// Return the type converted to an equivalently sized integer or vector 93 /// with integer element type. Similar to changeVectorElementTypeToInteger, 94 /// but also handles scalars. 95 EVT changeTypeToInteger() { 96 if (isVector()) 97 return changeVectorElementTypeToInteger(); 98 99 if (isSimple()) 100 return MVT::getIntegerVT(getSizeInBits()); 101 102 return changeExtendedTypeToInteger(); 103 } 104 105 /// isSimple - Test if the given EVT is simple (as opposed to being 106 /// extended). 107 bool isSimple() const { 108 return V.SimpleTy >= 0; 109 } 110 111 /// isExtended - Test if the given EVT is extended (as opposed to 112 /// being simple). 113 bool isExtended() const { 114 return !isSimple(); 115 } 116 117 /// isFloatingPoint - Return true if this is a FP, or a vector FP type. 118 bool isFloatingPoint() const { 119 return isSimple() ? V.isFloatingPoint() : isExtendedFloatingPoint(); 120 } 121 122 /// isInteger - Return true if this is an integer, or a vector integer type. 123 bool isInteger() const { 124 return isSimple() ? V.isInteger() : isExtendedInteger(); 125 } 126 127 /// isScalarInteger - Return true if this is an integer, but not a vector. 128 bool isScalarInteger() const { 129 return isSimple() ? V.isScalarInteger() : isExtendedScalarInteger(); 130 } 131 132 /// isVector - Return true if this is a vector value type. 133 bool isVector() const { 134 return isSimple() ? V.isVector() : isExtendedVector(); 135 } 136 137 /// is16BitVector - Return true if this is a 16-bit vector type. 138 bool is16BitVector() const { 139 return isSimple() ? V.is16BitVector() : isExtended16BitVector(); 140 } 141 142 /// is32BitVector - Return true if this is a 32-bit vector type. 143 bool is32BitVector() const { 144 return isSimple() ? V.is32BitVector() : isExtended32BitVector(); 145 } 146 147 /// is64BitVector - Return true if this is a 64-bit vector type. 148 bool is64BitVector() const { 149 return isSimple() ? V.is64BitVector() : isExtended64BitVector(); 150 } 151 152 /// is128BitVector - Return true if this is a 128-bit vector type. 153 bool is128BitVector() const { 154 return isSimple() ? V.is128BitVector() : isExtended128BitVector(); 155 } 156 157 /// is256BitVector - Return true if this is a 256-bit vector type. 158 bool is256BitVector() const { 159 return isSimple() ? V.is256BitVector() : isExtended256BitVector(); 160 } 161 162 /// is512BitVector - Return true if this is a 512-bit vector type. 163 bool is512BitVector() const { 164 return isSimple() ? V.is512BitVector() : isExtended512BitVector(); 165 } 166 167 /// is1024BitVector - Return true if this is a 1024-bit vector type. 168 bool is1024BitVector() const { 169 return isSimple() ? V.is1024BitVector() : isExtended1024BitVector(); 170 } 171 172 /// is2048BitVector - Return true if this is a 2048-bit vector type. 173 bool is2048BitVector() const { 174 return isSimple() ? V.is2048BitVector() : isExtended2048BitVector(); 175 } 176 177 /// isOverloaded - Return true if this is an overloaded type for TableGen. 178 bool isOverloaded() const { 179 return (V==MVT::iAny || V==MVT::fAny || V==MVT::vAny || V==MVT::iPTRAny); 180 } 181 182 /// isByteSized - Return true if the bit size is a multiple of 8. 183 bool isByteSized() const { 184 return (getSizeInBits() & 7) == 0; 185 } 186 187 /// isRound - Return true if the size is a power-of-two number of bytes. 188 bool isRound() const { 189 unsigned BitSize = getSizeInBits(); 190 return BitSize >= 8 && !(BitSize & (BitSize - 1)); 191 } 192 193 /// bitsEq - Return true if this has the same number of bits as VT. 194 bool bitsEq(EVT VT) const { 195 if (EVT::operator==(VT)) return true; 196 return getSizeInBits() == VT.getSizeInBits(); 197 } 198 199 /// bitsGT - Return true if this has more bits than VT. 200 bool bitsGT(EVT VT) const { 201 if (EVT::operator==(VT)) return false; 202 return getSizeInBits() > VT.getSizeInBits(); 203 } 204 205 /// bitsGE - Return true if this has no less bits than VT. 206 bool bitsGE(EVT VT) const { 207 if (EVT::operator==(VT)) return true; 208 return getSizeInBits() >= VT.getSizeInBits(); 209 } 210 211 /// bitsLT - Return true if this has less bits than VT. 212 bool bitsLT(EVT VT) const { 213 if (EVT::operator==(VT)) return false; 214 return getSizeInBits() < VT.getSizeInBits(); 215 } 216 217 /// bitsLE - Return true if this has no more bits than VT. 218 bool bitsLE(EVT VT) const { 219 if (EVT::operator==(VT)) return true; 220 return getSizeInBits() <= VT.getSizeInBits(); 221 } 222 223 224 /// getSimpleVT - Return the SimpleValueType held in the specified 225 /// simple EVT. 226 MVT getSimpleVT() const { 227 assert(isSimple() && "Expected a SimpleValueType!"); 228 return V; 229 } 230 231 /// getScalarType - If this is a vector type, return the element type, 232 /// otherwise return this. 233 EVT getScalarType() const { 234 return isVector() ? getVectorElementType() : *this; 235 } 236 237 /// getVectorElementType - Given a vector type, return the type of 238 /// each element. 239 EVT getVectorElementType() const { 240 assert(isVector() && "Invalid vector type!"); 241 if (isSimple()) 242 return V.getVectorElementType(); 243 return getExtendedVectorElementType(); 244 } 245 246 /// getVectorNumElements - Given a vector type, return the number of 247 /// elements it contains. 248 unsigned getVectorNumElements() const { 249 assert(isVector() && "Invalid vector type!"); 250 if (isSimple()) 251 return V.getVectorNumElements(); 252 return getExtendedVectorNumElements(); 253 } 254 255 /// getSizeInBits - Return the size of the specified value type in bits. 256 unsigned getSizeInBits() const { 257 if (isSimple()) 258 return V.getSizeInBits(); 259 return getExtendedSizeInBits(); 260 } 261 262 unsigned getScalarSizeInBits() const { 263 return getScalarType().getSizeInBits(); 264 } 265 266 /// getStoreSize - Return the number of bytes overwritten by a store 267 /// of the specified value type. 268 unsigned getStoreSize() const { 269 return (getSizeInBits() + 7) / 8; 270 } 271 272 /// getStoreSizeInBits - Return the number of bits overwritten by a store 273 /// of the specified value type. 274 unsigned getStoreSizeInBits() const { 275 return getStoreSize() * 8; 276 } 277 278 /// getRoundIntegerType - Rounds the bit-width of the given integer EVT up 279 /// to the nearest power of two (and at least to eight), and returns the 280 /// integer EVT with that number of bits. 281 EVT getRoundIntegerType(LLVMContext &Context) const { 282 assert(isInteger() && !isVector() && "Invalid integer type!"); 283 unsigned BitWidth = getSizeInBits(); 284 if (BitWidth <= 8) 285 return EVT(MVT::i8); 286 return getIntegerVT(Context, 1 << Log2_32_Ceil(BitWidth)); 287 } 288 289 /// getHalfSizedIntegerVT - Finds the smallest simple value type that is 290 /// greater than or equal to half the width of this EVT. If no simple 291 /// value type can be found, an extended integer value type of half the 292 /// size (rounded up) is returned. 293 EVT getHalfSizedIntegerVT(LLVMContext &Context) const { 294 assert(isInteger() && !isVector() && "Invalid integer type!"); 295 unsigned EVTSize = getSizeInBits(); 296 for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE; 297 IntVT <= MVT::LAST_INTEGER_VALUETYPE; ++IntVT) { 298 EVT HalfVT = EVT((MVT::SimpleValueType)IntVT); 299 if (HalfVT.getSizeInBits() * 2 >= EVTSize) 300 return HalfVT; 301 } 302 return getIntegerVT(Context, (EVTSize + 1) / 2); 303 } 304 305 /// \brief Return a VT for an integer vector type with the size of the 306 /// elements doubled. The typed returned may be an extended type. 307 EVT widenIntegerVectorElementType(LLVMContext &Context) const { 308 EVT EltVT = getVectorElementType(); 309 EltVT = EVT::getIntegerVT(Context, 2 * EltVT.getSizeInBits()); 310 return EVT::getVectorVT(Context, EltVT, getVectorNumElements()); 311 } 312 313 /// isPow2VectorType - Returns true if the given vector is a power of 2. 314 bool isPow2VectorType() const { 315 unsigned NElts = getVectorNumElements(); 316 return !(NElts & (NElts - 1)); 317 } 318 319 /// getPow2VectorType - Widens the length of the given vector EVT up to 320 /// the nearest power of 2 and returns that type. 321 EVT getPow2VectorType(LLVMContext &Context) const { 322 if (!isPow2VectorType()) { 323 unsigned NElts = getVectorNumElements(); 324 unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts); 325 return EVT::getVectorVT(Context, getVectorElementType(), Pow2NElts); 326 } 327 else { 328 return *this; 329 } 330 } 331 332 /// getEVTString - This function returns value type as a string, 333 /// e.g. "i32". 334 std::string getEVTString() const; 335 336 /// getTypeForEVT - This method returns an LLVM type corresponding to the 337 /// specified EVT. For integer types, this returns an unsigned type. Note 338 /// that this will abort for types that cannot be represented. 339 Type *getTypeForEVT(LLVMContext &Context) const; 340 341 /// getEVT - Return the value type corresponding to the specified type. 342 /// This returns all pointers as iPTR. If HandleUnknown is true, unknown 343 /// types are returned as Other, otherwise they are invalid. 344 static EVT getEVT(Type *Ty, bool HandleUnknown = false); 345 346 intptr_t getRawBits() const { 347 if (isSimple()) 348 return V.SimpleTy; 349 else 350 return (intptr_t)(LLVMTy); 351 } 352 353 /// compareRawBits - A meaningless but well-behaved order, useful for 354 /// constructing containers. 355 struct compareRawBits { 356 bool operator()(EVT L, EVT R) const { 357 if (L.V.SimpleTy == R.V.SimpleTy) 358 return L.LLVMTy < R.LLVMTy; 359 else 360 return L.V.SimpleTy < R.V.SimpleTy; 361 } 362 }; 363 364 private: 365 // Methods for handling the Extended-type case in functions above. 366 // These are all out-of-line to prevent users of this header file 367 // from having a dependency on Type.h. 368 EVT changeExtendedTypeToInteger() const; 369 EVT changeExtendedVectorElementTypeToInteger() const; 370 static EVT getExtendedIntegerVT(LLVMContext &C, unsigned BitWidth); 371 static EVT getExtendedVectorVT(LLVMContext &C, EVT VT, 372 unsigned NumElements); 373 bool isExtendedFloatingPoint() const LLVM_READONLY; 374 bool isExtendedInteger() const LLVM_READONLY; 375 bool isExtendedScalarInteger() const LLVM_READONLY; 376 bool isExtendedVector() const LLVM_READONLY; 377 bool isExtended16BitVector() const LLVM_READONLY; 378 bool isExtended32BitVector() const LLVM_READONLY; 379 bool isExtended64BitVector() const LLVM_READONLY; 380 bool isExtended128BitVector() const LLVM_READONLY; 381 bool isExtended256BitVector() const LLVM_READONLY; 382 bool isExtended512BitVector() const LLVM_READONLY; 383 bool isExtended1024BitVector() const LLVM_READONLY; 384 bool isExtended2048BitVector() const LLVM_READONLY; 385 EVT getExtendedVectorElementType() const; 386 unsigned getExtendedVectorNumElements() const LLVM_READONLY; 387 unsigned getExtendedSizeInBits() const LLVM_READONLY; 388 }; 389 390 } // End llvm namespace 391 392 #endif 393
