| //===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the set of low-level target independent types which various |
| // values in the code generator are. This allows the target specific behavior |
| // of instructions to be described to target independent passes. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CODEGEN_VALUETYPES_H |
| #define LLVM_CODEGEN_VALUETYPES_H |
| |
| #include "llvm/CodeGen/MachineValueType.h" |
| #include <cassert> |
| #include <string> |
| |
| namespace llvm { |
| |
| class LLVMContext; |
| class Type; |
| |
| /// EVT - Extended Value Type. Capable of holding value types which are not |
| /// native for any processor (such as the i12345 type), as well as the types |
| /// a MVT can represent. |
| struct EVT { |
| private: |
| MVT V; |
| Type *LLVMTy; |
| |
| public: |
| constexpr EVT() : V(MVT::INVALID_SIMPLE_VALUE_TYPE), LLVMTy(nullptr) {} |
| constexpr EVT(MVT::SimpleValueType SVT) : V(SVT), LLVMTy(nullptr) {} |
| constexpr EVT(MVT S) : V(S), LLVMTy(nullptr) {} |
| |
| bool operator==(EVT VT) const { |
| return !(*this != VT); |
| } |
| bool operator!=(EVT VT) const { |
| if (V.SimpleTy != VT.V.SimpleTy) |
| return true; |
| if (V.SimpleTy < 0) |
| return LLVMTy != VT.LLVMTy; |
| return false; |
| } |
| |
| /// getFloatingPointVT - Returns the EVT that represents a floating point |
| /// type with the given number of bits. There are two floating point types |
| /// with 128 bits - this returns f128 rather than ppcf128. |
| static EVT getFloatingPointVT(unsigned BitWidth) { |
| return MVT::getFloatingPointVT(BitWidth); |
| } |
| |
| /// getIntegerVT - Returns the EVT that represents an integer with the given |
| /// number of bits. |
| static EVT getIntegerVT(LLVMContext &Context, unsigned BitWidth) { |
| MVT M = MVT::getIntegerVT(BitWidth); |
| if (M.SimpleTy >= 0) |
| return M; |
| return getExtendedIntegerVT(Context, BitWidth); |
| } |
| |
| /// getVectorVT - Returns the EVT that represents a vector NumElements in |
| /// length, where each element is of type VT. |
| static EVT getVectorVT(LLVMContext &Context, EVT VT, unsigned NumElements) { |
| MVT M = MVT::getVectorVT(VT.V, NumElements); |
| if (M.SimpleTy >= 0) |
| return M; |
| return getExtendedVectorVT(Context, VT, NumElements); |
| } |
| |
| /// changeVectorElementTypeToInteger - Return a vector with the same number |
| /// of elements as this vector, but with the element type converted to an |
| /// integer type with the same bitwidth. |
| EVT changeVectorElementTypeToInteger() const { |
| if (!isSimple()) |
| return changeExtendedVectorElementTypeToInteger(); |
| MVT EltTy = getSimpleVT().getVectorElementType(); |
| unsigned BitWidth = EltTy.getSizeInBits(); |
| MVT IntTy = MVT::getIntegerVT(BitWidth); |
| MVT VecTy = MVT::getVectorVT(IntTy, getVectorNumElements()); |
| assert(VecTy.SimpleTy >= 0 && |
| "Simple vector VT not representable by simple integer vector VT!"); |
| return VecTy; |
| } |
| |
| /// Return the type converted to an equivalently sized integer or vector |
| /// with integer element type. Similar to changeVectorElementTypeToInteger, |
| /// but also handles scalars. |
| EVT changeTypeToInteger() { |
| if (isVector()) |
| return changeVectorElementTypeToInteger(); |
| |
| if (isSimple()) |
| return MVT::getIntegerVT(getSizeInBits()); |
| |
| return changeExtendedTypeToInteger(); |
| } |
| |
| /// isSimple - Test if the given EVT is simple (as opposed to being |
| /// extended). |
| bool isSimple() const { |
| return V.SimpleTy >= 0; |
| } |
| |
| /// isExtended - Test if the given EVT is extended (as opposed to |
| /// being simple). |
| bool isExtended() const { |
| return !isSimple(); |
| } |
| |
| /// isFloatingPoint - Return true if this is a FP, or a vector FP type. |
| bool isFloatingPoint() const { |
| return isSimple() ? V.isFloatingPoint() : isExtendedFloatingPoint(); |
| } |
| |
| /// isInteger - Return true if this is an integer, or a vector integer type. |
| bool isInteger() const { |
| return isSimple() ? V.isInteger() : isExtendedInteger(); |
| } |
| |
| /// isScalarInteger - Return true if this is an integer, but not a vector. |
| bool isScalarInteger() const { |
| return isSimple() ? V.isScalarInteger() : isExtendedScalarInteger(); |
| } |
| |
| /// isVector - Return true if this is a vector value type. |
| bool isVector() const { |
| return isSimple() ? V.isVector() : isExtendedVector(); |
| } |
| |
| /// is16BitVector - Return true if this is a 16-bit vector type. |
| bool is16BitVector() const { |
| return isSimple() ? V.is16BitVector() : isExtended16BitVector(); |
| } |
| |
| /// is32BitVector - Return true if this is a 32-bit vector type. |
| bool is32BitVector() const { |
| return isSimple() ? V.is32BitVector() : isExtended32BitVector(); |
| } |
| |
| /// is64BitVector - Return true if this is a 64-bit vector type. |
| bool is64BitVector() const { |
| return isSimple() ? V.is64BitVector() : isExtended64BitVector(); |
| } |
| |
| /// is128BitVector - Return true if this is a 128-bit vector type. |
| bool is128BitVector() const { |
| return isSimple() ? V.is128BitVector() : isExtended128BitVector(); |
| } |
| |
| /// is256BitVector - Return true if this is a 256-bit vector type. |
| bool is256BitVector() const { |
| return isSimple() ? V.is256BitVector() : isExtended256BitVector(); |
| } |
| |
| /// is512BitVector - Return true if this is a 512-bit vector type. |
| bool is512BitVector() const { |
| return isSimple() ? V.is512BitVector() : isExtended512BitVector(); |
| } |
| |
| /// is1024BitVector - Return true if this is a 1024-bit vector type. |
| bool is1024BitVector() const { |
| return isSimple() ? V.is1024BitVector() : isExtended1024BitVector(); |
| } |
| |
| /// is2048BitVector - Return true if this is a 2048-bit vector type. |
| bool is2048BitVector() const { |
| return isSimple() ? V.is2048BitVector() : isExtended2048BitVector(); |
| } |
| |
| /// isOverloaded - Return true if this is an overloaded type for TableGen. |
| bool isOverloaded() const { |
| return (V==MVT::iAny || V==MVT::fAny || V==MVT::vAny || V==MVT::iPTRAny); |
| } |
| |
| /// isByteSized - Return true if the bit size is a multiple of 8. |
| bool isByteSized() const { |
| return (getSizeInBits() & 7) == 0; |
| } |
| |
| /// isRound - Return true if the size is a power-of-two number of bytes. |
| bool isRound() const { |
| unsigned BitSize = getSizeInBits(); |
| return BitSize >= 8 && !(BitSize & (BitSize - 1)); |
| } |
| |
| /// bitsEq - Return true if this has the same number of bits as VT. |
| bool bitsEq(EVT VT) const { |
| if (EVT::operator==(VT)) return true; |
| return getSizeInBits() == VT.getSizeInBits(); |
| } |
| |
| /// bitsGT - Return true if this has more bits than VT. |
| bool bitsGT(EVT VT) const { |
| if (EVT::operator==(VT)) return false; |
| return getSizeInBits() > VT.getSizeInBits(); |
| } |
| |
| /// bitsGE - Return true if this has no less bits than VT. |
| bool bitsGE(EVT VT) const { |
| if (EVT::operator==(VT)) return true; |
| return getSizeInBits() >= VT.getSizeInBits(); |
| } |
| |
| /// bitsLT - Return true if this has less bits than VT. |
| bool bitsLT(EVT VT) const { |
| if (EVT::operator==(VT)) return false; |
| return getSizeInBits() < VT.getSizeInBits(); |
| } |
| |
| /// bitsLE - Return true if this has no more bits than VT. |
| bool bitsLE(EVT VT) const { |
| if (EVT::operator==(VT)) return true; |
| return getSizeInBits() <= VT.getSizeInBits(); |
| } |
| |
| |
| /// getSimpleVT - Return the SimpleValueType held in the specified |
| /// simple EVT. |
| MVT getSimpleVT() const { |
| assert(isSimple() && "Expected a SimpleValueType!"); |
| return V; |
| } |
| |
| /// getScalarType - If this is a vector type, return the element type, |
| /// otherwise return this. |
| EVT getScalarType() const { |
| return isVector() ? getVectorElementType() : *this; |
| } |
| |
| /// getVectorElementType - Given a vector type, return the type of |
| /// each element. |
| EVT getVectorElementType() const { |
| assert(isVector() && "Invalid vector type!"); |
| if (isSimple()) |
| return V.getVectorElementType(); |
| return getExtendedVectorElementType(); |
| } |
| |
| /// getVectorNumElements - Given a vector type, return the number of |
| /// elements it contains. |
| unsigned getVectorNumElements() const { |
| assert(isVector() && "Invalid vector type!"); |
| if (isSimple()) |
| return V.getVectorNumElements(); |
| return getExtendedVectorNumElements(); |
| } |
| |
| /// getSizeInBits - Return the size of the specified value type in bits. |
| unsigned getSizeInBits() const { |
| if (isSimple()) |
| return V.getSizeInBits(); |
| return getExtendedSizeInBits(); |
| } |
| |
| unsigned getScalarSizeInBits() const { |
| return getScalarType().getSizeInBits(); |
| } |
| |
| /// getStoreSize - Return the number of bytes overwritten by a store |
| /// of the specified value type. |
| unsigned getStoreSize() const { |
| return (getSizeInBits() + 7) / 8; |
| } |
| |
| /// getStoreSizeInBits - Return the number of bits overwritten by a store |
| /// of the specified value type. |
| unsigned getStoreSizeInBits() const { |
| return getStoreSize() * 8; |
| } |
| |
| /// getRoundIntegerType - Rounds the bit-width of the given integer EVT up |
| /// to the nearest power of two (and at least to eight), and returns the |
| /// integer EVT with that number of bits. |
| EVT getRoundIntegerType(LLVMContext &Context) const { |
| assert(isInteger() && !isVector() && "Invalid integer type!"); |
| unsigned BitWidth = getSizeInBits(); |
| if (BitWidth <= 8) |
| return EVT(MVT::i8); |
| return getIntegerVT(Context, 1 << Log2_32_Ceil(BitWidth)); |
| } |
| |
| /// getHalfSizedIntegerVT - Finds the smallest simple value type that is |
| /// greater than or equal to half the width of this EVT. If no simple |
| /// value type can be found, an extended integer value type of half the |
| /// size (rounded up) is returned. |
| EVT getHalfSizedIntegerVT(LLVMContext &Context) const { |
| assert(isInteger() && !isVector() && "Invalid integer type!"); |
| unsigned EVTSize = getSizeInBits(); |
| for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE; |
| IntVT <= MVT::LAST_INTEGER_VALUETYPE; ++IntVT) { |
| EVT HalfVT = EVT((MVT::SimpleValueType)IntVT); |
| if (HalfVT.getSizeInBits() * 2 >= EVTSize) |
| return HalfVT; |
| } |
| return getIntegerVT(Context, (EVTSize + 1) / 2); |
| } |
| |
| /// \brief Return a VT for an integer vector type with the size of the |
| /// elements doubled. The typed returned may be an extended type. |
| EVT widenIntegerVectorElementType(LLVMContext &Context) const { |
| EVT EltVT = getVectorElementType(); |
| EltVT = EVT::getIntegerVT(Context, 2 * EltVT.getSizeInBits()); |
| return EVT::getVectorVT(Context, EltVT, getVectorNumElements()); |
| } |
| |
| /// isPow2VectorType - Returns true if the given vector is a power of 2. |
| bool isPow2VectorType() const { |
| unsigned NElts = getVectorNumElements(); |
| return !(NElts & (NElts - 1)); |
| } |
| |
| /// getPow2VectorType - Widens the length of the given vector EVT up to |
| /// the nearest power of 2 and returns that type. |
| EVT getPow2VectorType(LLVMContext &Context) const { |
| if (!isPow2VectorType()) { |
| unsigned NElts = getVectorNumElements(); |
| unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts); |
| return EVT::getVectorVT(Context, getVectorElementType(), Pow2NElts); |
| } |
| else { |
| return *this; |
| } |
| } |
| |
| /// getEVTString - This function returns value type as a string, |
| /// e.g. "i32". |
| std::string getEVTString() const; |
| |
| /// getTypeForEVT - This method returns an LLVM type corresponding to the |
| /// specified EVT. For integer types, this returns an unsigned type. Note |
| /// that this will abort for types that cannot be represented. |
| Type *getTypeForEVT(LLVMContext &Context) const; |
| |
| /// getEVT - Return the value type corresponding to the specified type. |
| /// This returns all pointers as iPTR. If HandleUnknown is true, unknown |
| /// types are returned as Other, otherwise they are invalid. |
| static EVT getEVT(Type *Ty, bool HandleUnknown = false); |
| |
| intptr_t getRawBits() const { |
| if (isSimple()) |
| return V.SimpleTy; |
| else |
| return (intptr_t)(LLVMTy); |
| } |
| |
| /// compareRawBits - A meaningless but well-behaved order, useful for |
| /// constructing containers. |
| struct compareRawBits { |
| bool operator()(EVT L, EVT R) const { |
| if (L.V.SimpleTy == R.V.SimpleTy) |
| return L.LLVMTy < R.LLVMTy; |
| else |
| return L.V.SimpleTy < R.V.SimpleTy; |
| } |
| }; |
| |
| private: |
| // Methods for handling the Extended-type case in functions above. |
| // These are all out-of-line to prevent users of this header file |
| // from having a dependency on Type.h. |
| EVT changeExtendedTypeToInteger() const; |
| EVT changeExtendedVectorElementTypeToInteger() const; |
| static EVT getExtendedIntegerVT(LLVMContext &C, unsigned BitWidth); |
| static EVT getExtendedVectorVT(LLVMContext &C, EVT VT, |
| unsigned NumElements); |
| bool isExtendedFloatingPoint() const LLVM_READONLY; |
| bool isExtendedInteger() const LLVM_READONLY; |
| bool isExtendedScalarInteger() const LLVM_READONLY; |
| bool isExtendedVector() const LLVM_READONLY; |
| bool isExtended16BitVector() const LLVM_READONLY; |
| bool isExtended32BitVector() const LLVM_READONLY; |
| bool isExtended64BitVector() const LLVM_READONLY; |
| bool isExtended128BitVector() const LLVM_READONLY; |
| bool isExtended256BitVector() const LLVM_READONLY; |
| bool isExtended512BitVector() const LLVM_READONLY; |
| bool isExtended1024BitVector() const LLVM_READONLY; |
| bool isExtended2048BitVector() const LLVM_READONLY; |
| EVT getExtendedVectorElementType() const; |
| unsigned getExtendedVectorNumElements() const LLVM_READONLY; |
| unsigned getExtendedSizeInBits() const LLVM_READONLY; |
| }; |
| |
| } // End llvm namespace |
| |
| #endif |