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 /// isVector - Return true if this is a vector value type. 128 bool isVector() const { 129 return isSimple() ? V.isVector() : isExtendedVector(); 130 } 131 132 /// is16BitVector - Return true if this is a 16-bit vector type. 133 bool is16BitVector() const { 134 return isSimple() ? V.is16BitVector() : isExtended16BitVector(); 135 } 136 137 /// is32BitVector - Return true if this is a 32-bit vector type. 138 bool is32BitVector() const { 139 return isSimple() ? V.is32BitVector() : isExtended32BitVector(); 140 } 141 142 /// is64BitVector - Return true if this is a 64-bit vector type. 143 bool is64BitVector() const { 144 return isSimple() ? V.is64BitVector() : isExtended64BitVector(); 145 } 146 147 /// is128BitVector - Return true if this is a 128-bit vector type. 148 bool is128BitVector() const { 149 return isSimple() ? V.is128BitVector() : isExtended128BitVector(); 150 } 151 152 /// is256BitVector - Return true if this is a 256-bit vector type. 153 bool is256BitVector() const { 154 return isSimple() ? V.is256BitVector() : isExtended256BitVector(); 155 } 156 157 /// is512BitVector - Return true if this is a 512-bit vector type. 158 bool is512BitVector() const { 159 return isSimple() ? V.is512BitVector() : isExtended512BitVector(); 160 } 161 162 /// is1024BitVector - Return true if this is a 1024-bit vector type. 163 bool is1024BitVector() const { 164 return isSimple() ? V.is1024BitVector() : isExtended1024BitVector(); 165 } 166 167 /// is2048BitVector - Return true if this is a 2048-bit vector type. 168 bool is2048BitVector() const { 169 return isSimple() ? V.is2048BitVector() : isExtended2048BitVector(); 170 } 171 172 /// isOverloaded - Return true if this is an overloaded type for TableGen. 173 bool isOverloaded() const { 174 return (V==MVT::iAny || V==MVT::fAny || V==MVT::vAny || V==MVT::iPTRAny); 175 } 176 177 /// isByteSized - Return true if the bit size is a multiple of 8. 178 bool isByteSized() const { 179 return (getSizeInBits() & 7) == 0; 180 } 181 182 /// isRound - Return true if the size is a power-of-two number of bytes. 183 bool isRound() const { 184 unsigned BitSize = getSizeInBits(); 185 return BitSize >= 8 && !(BitSize & (BitSize - 1)); 186 } 187 188 /// bitsEq - Return true if this has the same number of bits as VT. 189 bool bitsEq(EVT VT) const { 190 if (EVT::operator==(VT)) return true; 191 return getSizeInBits() == VT.getSizeInBits(); 192 } 193 194 /// bitsGT - Return true if this has more bits than VT. 195 bool bitsGT(EVT VT) const { 196 if (EVT::operator==(VT)) return false; 197 return getSizeInBits() > VT.getSizeInBits(); 198 } 199 200 /// bitsGE - Return true if this has no less bits than VT. 201 bool bitsGE(EVT VT) const { 202 if (EVT::operator==(VT)) return true; 203 return getSizeInBits() >= VT.getSizeInBits(); 204 } 205 206 /// bitsLT - Return true if this has less bits than VT. 207 bool bitsLT(EVT VT) const { 208 if (EVT::operator==(VT)) return false; 209 return getSizeInBits() < VT.getSizeInBits(); 210 } 211 212 /// bitsLE - Return true if this has no more bits than VT. 213 bool bitsLE(EVT VT) const { 214 if (EVT::operator==(VT)) return true; 215 return getSizeInBits() <= VT.getSizeInBits(); 216 } 217 218 219 /// getSimpleVT - Return the SimpleValueType held in the specified 220 /// simple EVT. 221 MVT getSimpleVT() const { 222 assert(isSimple() && "Expected a SimpleValueType!"); 223 return V; 224 } 225 226 /// getScalarType - If this is a vector type, return the element type, 227 /// otherwise return this. 228 EVT getScalarType() const { 229 return isVector() ? getVectorElementType() : *this; 230 } 231 232 /// getVectorElementType - Given a vector type, return the type of 233 /// each element. 234 EVT getVectorElementType() const { 235 assert(isVector() && "Invalid vector type!"); 236 if (isSimple()) 237 return V.getVectorElementType(); 238 return getExtendedVectorElementType(); 239 } 240 241 /// getVectorNumElements - Given a vector type, return the number of 242 /// elements it contains. 243 unsigned getVectorNumElements() const { 244 assert(isVector() && "Invalid vector type!"); 245 if (isSimple()) 246 return V.getVectorNumElements(); 247 return getExtendedVectorNumElements(); 248 } 249 250 /// getSizeInBits - Return the size of the specified value type in bits. 251 unsigned getSizeInBits() const { 252 if (isSimple()) 253 return V.getSizeInBits(); 254 return getExtendedSizeInBits(); 255 } 256 257 unsigned getScalarSizeInBits() const { 258 return getScalarType().getSizeInBits(); 259 } 260 261 /// getStoreSize - Return the number of bytes overwritten by a store 262 /// of the specified value type. 263 unsigned getStoreSize() const { 264 return (getSizeInBits() + 7) / 8; 265 } 266 267 /// getStoreSizeInBits - Return the number of bits overwritten by a store 268 /// of the specified value type. 269 unsigned getStoreSizeInBits() const { 270 return getStoreSize() * 8; 271 } 272 273 /// getRoundIntegerType - Rounds the bit-width of the given integer EVT up 274 /// to the nearest power of two (and at least to eight), and returns the 275 /// integer EVT with that number of bits. 276 EVT getRoundIntegerType(LLVMContext &Context) const { 277 assert(isInteger() && !isVector() && "Invalid integer type!"); 278 unsigned BitWidth = getSizeInBits(); 279 if (BitWidth <= 8) 280 return EVT(MVT::i8); 281 return getIntegerVT(Context, 1 << Log2_32_Ceil(BitWidth)); 282 } 283 284 /// getHalfSizedIntegerVT - Finds the smallest simple value type that is 285 /// greater than or equal to half the width of this EVT. If no simple 286 /// value type can be found, an extended integer value type of half the 287 /// size (rounded up) is returned. 288 EVT getHalfSizedIntegerVT(LLVMContext &Context) const { 289 assert(isInteger() && !isVector() && "Invalid integer type!"); 290 unsigned EVTSize = getSizeInBits(); 291 for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE; 292 IntVT <= MVT::LAST_INTEGER_VALUETYPE; ++IntVT) { 293 EVT HalfVT = EVT((MVT::SimpleValueType)IntVT); 294 if (HalfVT.getSizeInBits() * 2 >= EVTSize) 295 return HalfVT; 296 } 297 return getIntegerVT(Context, (EVTSize + 1) / 2); 298 } 299 300 /// \brief Return a VT for an integer vector type with the size of the 301 /// elements doubled. The typed returned may be an extended type. 302 EVT widenIntegerVectorElementType(LLVMContext &Context) const { 303 EVT EltVT = getVectorElementType(); 304 EltVT = EVT::getIntegerVT(Context, 2 * EltVT.getSizeInBits()); 305 return EVT::getVectorVT(Context, EltVT, getVectorNumElements()); 306 } 307 308 /// isPow2VectorType - Returns true if the given vector is a power of 2. 309 bool isPow2VectorType() const { 310 unsigned NElts = getVectorNumElements(); 311 return !(NElts & (NElts - 1)); 312 } 313 314 /// getPow2VectorType - Widens the length of the given vector EVT up to 315 /// the nearest power of 2 and returns that type. 316 EVT getPow2VectorType(LLVMContext &Context) const { 317 if (!isPow2VectorType()) { 318 unsigned NElts = getVectorNumElements(); 319 unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts); 320 return EVT::getVectorVT(Context, getVectorElementType(), Pow2NElts); 321 } 322 else { 323 return *this; 324 } 325 } 326 327 /// getEVTString - This function returns value type as a string, 328 /// e.g. "i32". 329 std::string getEVTString() const; 330 331 /// getTypeForEVT - This method returns an LLVM type corresponding to the 332 /// specified EVT. For integer types, this returns an unsigned type. Note 333 /// that this will abort for types that cannot be represented. 334 Type *getTypeForEVT(LLVMContext &Context) const; 335 336 /// getEVT - Return the value type corresponding to the specified type. 337 /// This returns all pointers as iPTR. If HandleUnknown is true, unknown 338 /// types are returned as Other, otherwise they are invalid. 339 static EVT getEVT(Type *Ty, bool HandleUnknown = false); 340 341 intptr_t getRawBits() const { 342 if (isSimple()) 343 return V.SimpleTy; 344 else 345 return (intptr_t)(LLVMTy); 346 } 347 348 /// compareRawBits - A meaningless but well-behaved order, useful for 349 /// constructing containers. 350 struct compareRawBits { 351 bool operator()(EVT L, EVT R) const { 352 if (L.V.SimpleTy == R.V.SimpleTy) 353 return L.LLVMTy < R.LLVMTy; 354 else 355 return L.V.SimpleTy < R.V.SimpleTy; 356 } 357 }; 358 359 private: 360 // Methods for handling the Extended-type case in functions above. 361 // These are all out-of-line to prevent users of this header file 362 // from having a dependency on Type.h. 363 EVT changeExtendedTypeToInteger() const; 364 EVT changeExtendedVectorElementTypeToInteger() const; 365 static EVT getExtendedIntegerVT(LLVMContext &C, unsigned BitWidth); 366 static EVT getExtendedVectorVT(LLVMContext &C, EVT VT, 367 unsigned NumElements); 368 bool isExtendedFloatingPoint() const LLVM_READONLY; 369 bool isExtendedInteger() const LLVM_READONLY; 370 bool isExtendedVector() const LLVM_READONLY; 371 bool isExtended16BitVector() const LLVM_READONLY; 372 bool isExtended32BitVector() const LLVM_READONLY; 373 bool isExtended64BitVector() const LLVM_READONLY; 374 bool isExtended128BitVector() const LLVM_READONLY; 375 bool isExtended256BitVector() const LLVM_READONLY; 376 bool isExtended512BitVector() const LLVM_READONLY; 377 bool isExtended1024BitVector() const LLVM_READONLY; 378 bool isExtended2048BitVector() const LLVM_READONLY; 379 EVT getExtendedVectorElementType() const; 380 unsigned getExtendedVectorNumElements() const LLVM_READONLY; 381 unsigned getExtendedSizeInBits() const; 382 }; 383 384 } // End llvm namespace 385 386 #endif 387
