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cd52a7a381
Apparently, the style needs to be agreed upon first. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240390 91177308-0d34-0410-b5e6-96231b3b80d8
367 lines
13 KiB
C++
367 lines
13 KiB
C++
//===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the set of low-level target independent types which various
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// values in the code generator are. This allows the target specific behavior
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// of instructions to be described to target independent passes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_VALUETYPES_H
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#define LLVM_CODEGEN_VALUETYPES_H
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#include "llvm/CodeGen/MachineValueType.h"
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#include <cassert>
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#include <string>
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namespace llvm {
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class LLVMContext;
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class Type;
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/// EVT - Extended Value Type. Capable of holding value types which are not
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/// native for any processor (such as the i12345 type), as well as the types
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/// a MVT can represent.
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struct EVT {
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private:
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MVT V;
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Type *LLVMTy;
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public:
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LLVM_CONSTEXPR EVT() : V(MVT::INVALID_SIMPLE_VALUE_TYPE), LLVMTy(nullptr) {}
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LLVM_CONSTEXPR EVT(MVT::SimpleValueType SVT) : V(SVT), LLVMTy(nullptr) {}
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LLVM_CONSTEXPR EVT(MVT S) : V(S), LLVMTy(nullptr) {}
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bool operator==(EVT VT) const {
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return !(*this != VT);
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}
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bool operator!=(EVT VT) const {
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if (V.SimpleTy != VT.V.SimpleTy)
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return true;
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if (V.SimpleTy < 0)
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return LLVMTy != VT.LLVMTy;
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return false;
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}
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/// getFloatingPointVT - Returns the EVT that represents a floating point
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/// type with the given number of bits. There are two floating point types
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/// with 128 bits - this returns f128 rather than ppcf128.
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static EVT getFloatingPointVT(unsigned BitWidth) {
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return MVT::getFloatingPointVT(BitWidth);
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}
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/// getIntegerVT - Returns the EVT that represents an integer with the given
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/// number of bits.
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static EVT getIntegerVT(LLVMContext &Context, unsigned BitWidth) {
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MVT M = MVT::getIntegerVT(BitWidth);
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if (M.SimpleTy >= 0)
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return M;
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return getExtendedIntegerVT(Context, BitWidth);
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}
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/// getVectorVT - Returns the EVT that represents a vector NumElements in
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/// length, where each element is of type VT.
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static EVT getVectorVT(LLVMContext &Context, EVT VT, unsigned NumElements) {
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MVT M = MVT::getVectorVT(VT.V, NumElements);
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if (M.SimpleTy >= 0)
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return M;
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return getExtendedVectorVT(Context, VT, NumElements);
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}
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/// changeVectorElementTypeToInteger - Return a vector with the same number
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/// of elements as this vector, but with the element type converted to an
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/// integer type with the same bitwidth.
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EVT changeVectorElementTypeToInteger() const {
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if (!isSimple())
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return changeExtendedVectorElementTypeToInteger();
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MVT EltTy = getSimpleVT().getVectorElementType();
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unsigned BitWidth = EltTy.getSizeInBits();
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MVT IntTy = MVT::getIntegerVT(BitWidth);
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MVT VecTy = MVT::getVectorVT(IntTy, getVectorNumElements());
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assert(VecTy.SimpleTy >= 0 &&
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"Simple vector VT not representable by simple integer vector VT!");
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return VecTy;
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}
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/// isSimple - Test if the given EVT is simple (as opposed to being
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/// extended).
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bool isSimple() const {
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return V.SimpleTy >= 0;
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}
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/// isExtended - Test if the given EVT is extended (as opposed to
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/// being simple).
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bool isExtended() const {
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return !isSimple();
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}
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/// isFloatingPoint - Return true if this is a FP, or a vector FP type.
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bool isFloatingPoint() const {
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return isSimple() ? V.isFloatingPoint() : isExtendedFloatingPoint();
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}
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/// isInteger - Return true if this is an integer, or a vector integer type.
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bool isInteger() const {
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return isSimple() ? V.isInteger() : isExtendedInteger();
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}
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/// isVector - Return true if this is a vector value type.
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bool isVector() const {
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return isSimple() ? V.isVector() : isExtendedVector();
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}
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/// is16BitVector - Return true if this is a 16-bit vector type.
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bool is16BitVector() const {
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return isSimple() ? V.is16BitVector() : isExtended16BitVector();
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}
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/// is32BitVector - Return true if this is a 32-bit vector type.
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bool is32BitVector() const {
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return isSimple() ? V.is32BitVector() : isExtended32BitVector();
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}
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/// is64BitVector - Return true if this is a 64-bit vector type.
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bool is64BitVector() const {
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return isSimple() ? V.is64BitVector() : isExtended64BitVector();
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}
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/// is128BitVector - Return true if this is a 128-bit vector type.
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bool is128BitVector() const {
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return isSimple() ? V.is128BitVector() : isExtended128BitVector();
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}
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/// is256BitVector - Return true if this is a 256-bit vector type.
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bool is256BitVector() const {
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return isSimple() ? V.is256BitVector() : isExtended256BitVector();
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}
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/// is512BitVector - Return true if this is a 512-bit vector type.
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bool is512BitVector() const {
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return isSimple() ? V.is512BitVector() : isExtended512BitVector();
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}
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/// is1024BitVector - Return true if this is a 1024-bit vector type.
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bool is1024BitVector() const {
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return isSimple() ? V.is1024BitVector() : isExtended1024BitVector();
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}
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/// isOverloaded - Return true if this is an overloaded type for TableGen.
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bool isOverloaded() const {
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return (V==MVT::iAny || V==MVT::fAny || V==MVT::vAny || V==MVT::iPTRAny);
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}
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/// isByteSized - Return true if the bit size is a multiple of 8.
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bool isByteSized() const {
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return (getSizeInBits() & 7) == 0;
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}
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/// isRound - Return true if the size is a power-of-two number of bytes.
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bool isRound() const {
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unsigned BitSize = getSizeInBits();
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return BitSize >= 8 && !(BitSize & (BitSize - 1));
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}
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/// bitsEq - Return true if this has the same number of bits as VT.
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bool bitsEq(EVT VT) const {
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if (EVT::operator==(VT)) return true;
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return getSizeInBits() == VT.getSizeInBits();
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}
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/// bitsGT - Return true if this has more bits than VT.
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bool bitsGT(EVT VT) const {
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if (EVT::operator==(VT)) return false;
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return getSizeInBits() > VT.getSizeInBits();
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}
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/// bitsGE - Return true if this has no less bits than VT.
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bool bitsGE(EVT VT) const {
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if (EVT::operator==(VT)) return true;
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return getSizeInBits() >= VT.getSizeInBits();
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}
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/// bitsLT - Return true if this has less bits than VT.
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bool bitsLT(EVT VT) const {
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if (EVT::operator==(VT)) return false;
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return getSizeInBits() < VT.getSizeInBits();
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}
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/// bitsLE - Return true if this has no more bits than VT.
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bool bitsLE(EVT VT) const {
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if (EVT::operator==(VT)) return true;
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return getSizeInBits() <= VT.getSizeInBits();
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}
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/// getSimpleVT - Return the SimpleValueType held in the specified
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/// simple EVT.
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MVT getSimpleVT() const {
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assert(isSimple() && "Expected a SimpleValueType!");
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return V;
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}
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/// getScalarType - If this is a vector type, return the element type,
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/// otherwise return this.
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EVT getScalarType() const {
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return isVector() ? getVectorElementType() : *this;
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}
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/// getVectorElementType - Given a vector type, return the type of
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/// each element.
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EVT getVectorElementType() const {
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assert(isVector() && "Invalid vector type!");
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if (isSimple())
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return V.getVectorElementType();
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return getExtendedVectorElementType();
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}
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/// getVectorNumElements - Given a vector type, return the number of
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/// elements it contains.
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unsigned getVectorNumElements() const {
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assert(isVector() && "Invalid vector type!");
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if (isSimple())
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return V.getVectorNumElements();
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return getExtendedVectorNumElements();
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}
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/// getSizeInBits - Return the size of the specified value type in bits.
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unsigned getSizeInBits() const {
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if (isSimple())
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return V.getSizeInBits();
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return getExtendedSizeInBits();
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}
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unsigned getScalarSizeInBits() const {
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return getScalarType().getSizeInBits();
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}
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/// getStoreSize - Return the number of bytes overwritten by a store
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/// of the specified value type.
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unsigned getStoreSize() const {
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return (getSizeInBits() + 7) / 8;
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}
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/// getStoreSizeInBits - Return the number of bits overwritten by a store
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/// of the specified value type.
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unsigned getStoreSizeInBits() const {
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return getStoreSize() * 8;
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}
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/// getRoundIntegerType - Rounds the bit-width of the given integer EVT up
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/// to the nearest power of two (and at least to eight), and returns the
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/// integer EVT with that number of bits.
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EVT getRoundIntegerType(LLVMContext &Context) const {
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assert(isInteger() && !isVector() && "Invalid integer type!");
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unsigned BitWidth = getSizeInBits();
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if (BitWidth <= 8)
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return EVT(MVT::i8);
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return getIntegerVT(Context, 1 << Log2_32_Ceil(BitWidth));
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}
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/// getHalfSizedIntegerVT - Finds the smallest simple value type that is
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/// greater than or equal to half the width of this EVT. If no simple
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/// value type can be found, an extended integer value type of half the
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/// size (rounded up) is returned.
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EVT getHalfSizedIntegerVT(LLVMContext &Context) const {
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assert(isInteger() && !isVector() && "Invalid integer type!");
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unsigned EVTSize = getSizeInBits();
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for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE;
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IntVT <= MVT::LAST_INTEGER_VALUETYPE; ++IntVT) {
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EVT HalfVT = EVT((MVT::SimpleValueType)IntVT);
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if (HalfVT.getSizeInBits() * 2 >= EVTSize)
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return HalfVT;
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}
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return getIntegerVT(Context, (EVTSize + 1) / 2);
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}
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/// \brief Return a VT for an integer vector type with the size of the
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/// elements doubled. The typed returned may be an extended type.
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EVT widenIntegerVectorElementType(LLVMContext &Context) const {
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EVT EltVT = getVectorElementType();
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EltVT = EVT::getIntegerVT(Context, 2 * EltVT.getSizeInBits());
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return EVT::getVectorVT(Context, EltVT, getVectorNumElements());
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}
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/// isPow2VectorType - Returns true if the given vector is a power of 2.
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bool isPow2VectorType() const {
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unsigned NElts = getVectorNumElements();
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return !(NElts & (NElts - 1));
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}
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/// getPow2VectorType - Widens the length of the given vector EVT up to
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/// the nearest power of 2 and returns that type.
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EVT getPow2VectorType(LLVMContext &Context) const {
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if (!isPow2VectorType()) {
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unsigned NElts = getVectorNumElements();
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unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts);
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return EVT::getVectorVT(Context, getVectorElementType(), Pow2NElts);
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}
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else {
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return *this;
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}
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}
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/// getEVTString - This function returns value type as a string,
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/// e.g. "i32".
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std::string getEVTString() const;
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/// getTypeForEVT - This method returns an LLVM type corresponding to the
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/// specified EVT. For integer types, this returns an unsigned type. Note
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/// that this will abort for types that cannot be represented.
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Type *getTypeForEVT(LLVMContext &Context) const;
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/// getEVT - Return the value type corresponding to the specified type.
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/// This returns all pointers as iPTR. If HandleUnknown is true, unknown
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/// types are returned as Other, otherwise they are invalid.
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static EVT getEVT(Type *Ty, bool HandleUnknown = false);
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intptr_t getRawBits() const {
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if (isSimple())
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return V.SimpleTy;
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else
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return (intptr_t)(LLVMTy);
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}
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/// compareRawBits - A meaningless but well-behaved order, useful for
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/// constructing containers.
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struct compareRawBits {
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bool operator()(EVT L, EVT R) const {
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if (L.V.SimpleTy == R.V.SimpleTy)
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return L.LLVMTy < R.LLVMTy;
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else
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return L.V.SimpleTy < R.V.SimpleTy;
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}
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};
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private:
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// Methods for handling the Extended-type case in functions above.
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// These are all out-of-line to prevent users of this header file
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// from having a dependency on Type.h.
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EVT changeExtendedVectorElementTypeToInteger() const;
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static EVT getExtendedIntegerVT(LLVMContext &C, unsigned BitWidth);
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static EVT getExtendedVectorVT(LLVMContext &C, EVT VT,
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unsigned NumElements);
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bool isExtendedFloatingPoint() const LLVM_READONLY;
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bool isExtendedInteger() const LLVM_READONLY;
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bool isExtendedVector() const LLVM_READONLY;
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bool isExtended16BitVector() const LLVM_READONLY;
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bool isExtended32BitVector() const LLVM_READONLY;
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bool isExtended64BitVector() const LLVM_READONLY;
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bool isExtended128BitVector() const LLVM_READONLY;
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bool isExtended256BitVector() const LLVM_READONLY;
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bool isExtended512BitVector() const LLVM_READONLY;
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bool isExtended1024BitVector() const LLVM_READONLY;
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EVT getExtendedVectorElementType() const;
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unsigned getExtendedVectorNumElements() const LLVM_READONLY;
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unsigned getExtendedSizeInBits() const;
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};
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} // End llvm namespace
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#endif
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