Coverage Report

Created: 2018-11-16 02:38

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/Support/LowLevelTypeImpl.h
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//== llvm/Support/LowLevelTypeImpl.h --------------------------- -*- 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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/// Implement a low-level type suitable for MachineInstr level instruction
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/// selection.
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///
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/// For a type attached to a MachineInstr, we only care about 2 details: total
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/// size and the number of vector lanes (if any). Accordingly, there are 4
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/// possible valid type-kinds:
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///
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///    * `sN` for scalars and aggregates
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///    * `<N x sM>` for vectors, which must have at least 2 elements.
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///    * `pN` for pointers
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///
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/// Other information required for correct selection is expected to be carried
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/// by the opcode, or non-type flags. For example the distinction between G_ADD
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/// and G_FADD for int/float or fast-math flags.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_LOWLEVELTYPEIMPL_H
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#define LLVM_SUPPORT_LOWLEVELTYPEIMPL_H
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#include "llvm/ADT/DenseMapInfo.h"
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#include "llvm/Support/MachineValueType.h"
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#include <cassert>
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namespace llvm {
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class DataLayout;
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class Type;
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class raw_ostream;
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0
class LLT {
Unexecuted instantiation: llvm::LLT::operator=(llvm::LLT const&)
Unexecuted instantiation: llvm::LLT::operator=(llvm::LLT&&)
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public:
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  /// Get a low-level scalar or aggregate "bag of bits".
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18.4M
  static LLT scalar(unsigned SizeInBits) {
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18.4M
    assert(SizeInBits > 0 && "invalid scalar size");
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18.4M
    return LLT{/*isPointer=*/false, /*isVector=*/false, /*NumElements=*/0,
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18.4M
               SizeInBits, /*AddressSpace=*/0};
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18.4M
  }
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  /// Get a low-level pointer in the given address space (defaulting to 0).
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12.8M
  static LLT pointer(uint16_t AddressSpace, unsigned SizeInBits) {
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12.8M
    assert(SizeInBits > 0 && "invalid pointer size");
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12.8M
    return LLT{/*isPointer=*/true, /*isVector=*/false, /*NumElements=*/0,
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12.8M
               SizeInBits, AddressSpace};
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12.8M
  }
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  /// Get a low-level vector of some number of elements and element width.
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  /// \p NumElements must be at least 2.
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4.60M
  static LLT vector(uint16_t NumElements, unsigned ScalarSizeInBits) {
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4.60M
    assert(NumElements > 1 && "invalid number of vector elements");
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4.60M
    assert(ScalarSizeInBits > 0 && "invalid vector element size");
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4.60M
    return LLT{/*isPointer=*/false, /*isVector=*/true, NumElements,
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4.60M
               ScalarSizeInBits, /*AddressSpace=*/0};
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4.60M
  }
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  /// Get a low-level vector of some number of elements and element type.
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303k
  static LLT vector(uint16_t NumElements, LLT ScalarTy) {
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303k
    assert(NumElements > 1 && "invalid number of vector elements");
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303k
    assert(!ScalarTy.isVector() && "invalid vector element type");
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303k
    return LLT{ScalarTy.isPointer(), /*isVector=*/true, NumElements,
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               ScalarTy.getSizeInBits(),
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               ScalarTy.isPointer() ? 
ScalarTy.getAddressSpace()662
:
0302k
};
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303k
  }
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  explicit LLT(bool isPointer, bool isVector, uint16_t NumElements,
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36.1M
               unsigned SizeInBits, unsigned AddressSpace) {
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36.1M
    init(isPointer, isVector, NumElements, SizeInBits, AddressSpace);
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36.1M
  }
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49.4M
  explicit LLT() : IsPointer(false), IsVector(false), RawData(0) {}
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  explicit LLT(MVT VT);
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160M
  bool isValid() const { return RawData != 0; }
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47.9M
  bool isScalar() const { return isValid() && 
!IsPointer47.9M
&&
!IsVector47.2M
; }
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64.9M
  bool isPointer() const 
{ return 64.9M
isValid()64.9M
&& IsPointer &&
!IsVector18.0M
; }
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18.3M
  bool isVector() const { return isValid() && 
IsVector18.3M
; }
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  /// Returns the number of elements in a vector LLT. Must only be called on
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  /// vector types.
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1.67M
  uint16_t getNumElements() const {
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1.67M
    assert(IsVector && "cannot get number of elements on scalar/aggregate");
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1.67M
    if (!IsPointer)
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1.67M
      return getFieldValue(VectorElementsFieldInfo);
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662
    else
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      return getFieldValue(PointerVectorElementsFieldInfo);
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1.67M
  }
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  /// Returns the total size of the type. Must only be called on sized types.
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56.5M
  unsigned getSizeInBits() const {
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    if (isPointer() || 
isScalar()39.3M
)
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      return getScalarSizeInBits();
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1.14M
    return getScalarSizeInBits() * getNumElements();
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1.14M
  }
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57.3M
  unsigned getScalarSizeInBits() const {
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57.3M
    assert(RawData != 0 && "Invalid Type");
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57.3M
    if (!IsVector) {
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55.3M
      if (!IsPointer)
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38.2M
        return getFieldValue(ScalarSizeFieldInfo);
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17.1M
      else
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        return getFieldValue(PointerSizeFieldInfo);
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1.94M
    } else {
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1.94M
      if (!IsPointer)
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        return getFieldValue(VectorSizeFieldInfo);
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1.40k
      else
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        return getFieldValue(PointerVectorSizeFieldInfo);
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    }
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57.3M
  }
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  unsigned getAddressSpace() const {
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    assert(RawData != 0 && "Invalid Type");
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    assert(IsPointer && "cannot get address space of non-pointer type");
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    if (!IsVector)
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      return getFieldValue(PointerAddressSpaceFieldInfo);
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    else
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      return getFieldValue(PointerVectorAddressSpaceFieldInfo);
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  }
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  /// Returns the vector's element type. Only valid for vector types.
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  LLT getElementType() const {
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    assert(isVector() && "cannot get element type of scalar/aggregate");
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786k
    if (IsPointer)
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      return pointer(getAddressSpace(), getScalarSizeInBits());
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    else
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      return scalar(getScalarSizeInBits());
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  }
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  void print(raw_ostream &OS) const;
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134M
  bool operator==(const LLT &RHS) const {
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134M
    return IsPointer == RHS.IsPointer && 
IsVector == RHS.IsVector117M
&&
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RHS.RawData == RawData110M
;
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  }
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2.33M
  bool operator!=(const LLT &RHS) const { return !(*this == RHS); }
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  friend struct DenseMapInfo<LLT>;
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private:
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  /// LLT is packed into 64 bits as follows:
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  /// isPointer : 1
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  /// isVector  : 1
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  /// with 62 bits remaining for Kind-specific data, packed in bitfields
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  /// as described below. As there isn't a simple portable way to pack bits
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  /// into bitfields, here the different fields in the packed structure is
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  /// described in static const *Field variables. Each of these variables
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  /// is a 2-element array, with the first element describing the bitfield size
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  /// and the second element describing the bitfield offset.
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  typedef int BitFieldInfo[2];
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  ///
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  /// This is how the bitfields are packed per Kind:
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  /// * Invalid:
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  ///   gets encoded as RawData == 0, as that is an invalid encoding, since for
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  ///   valid encodings, SizeInBits/SizeOfElement must be larger than 0.
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  /// * Non-pointer scalar (isPointer == 0 && isVector == 0):
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  ///   SizeInBits: 32;
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  static const constexpr BitFieldInfo ScalarSizeFieldInfo{32, 0};
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  /// * Pointer (isPointer == 1 && isVector == 0):
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  ///   SizeInBits: 16;
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  ///   AddressSpace: 23;
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  static const constexpr BitFieldInfo PointerSizeFieldInfo{16, 0};
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  static const constexpr BitFieldInfo PointerAddressSpaceFieldInfo{
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      23, PointerSizeFieldInfo[0] + PointerSizeFieldInfo[1]};
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  /// * Vector-of-non-pointer (isPointer == 0 && isVector == 1):
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  ///   NumElements: 16;
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  ///   SizeOfElement: 32;
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  static const constexpr BitFieldInfo VectorElementsFieldInfo{16, 0};
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  static const constexpr BitFieldInfo VectorSizeFieldInfo{
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      32, VectorElementsFieldInfo[0] + VectorElementsFieldInfo[1]};
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  /// * Vector-of-pointer (isPointer == 1 && isVector == 1):
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  ///   NumElements: 16;
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  ///   SizeOfElement: 16;
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  ///   AddressSpace: 23;
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  static const constexpr BitFieldInfo PointerVectorElementsFieldInfo{16, 0};
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  static const constexpr BitFieldInfo PointerVectorSizeFieldInfo{
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      16,
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      PointerVectorElementsFieldInfo[1] + PointerVectorElementsFieldInfo[0]};
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  static const constexpr BitFieldInfo PointerVectorAddressSpaceFieldInfo{
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      23, PointerVectorSizeFieldInfo[1] + PointerVectorSizeFieldInfo[0]};
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  uint64_t IsPointer : 1;
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  uint64_t IsVector : 1;
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  uint64_t RawData : 62;
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116M
  static uint64_t getMask(const BitFieldInfo FieldInfo) {
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116M
    const int FieldSizeInBits = FieldInfo[0];
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116M
    return (((uint64_t)1) << FieldSizeInBits) - 1;
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116M
  }
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57.0M
  static uint64_t maskAndShift(uint64_t Val, uint64_t Mask, uint8_t Shift) {
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57.0M
    assert(Val <= Mask && "Value too large for field");
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57.0M
    return (Val & Mask) << Shift;
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57.0M
  }
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57.0M
  static uint64_t maskAndShift(uint64_t Val, const BitFieldInfo FieldInfo) {
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57.0M
    return maskAndShift(Val, getMask(FieldInfo), FieldInfo[1]);
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57.0M
  }
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  uint64_t getFieldValue(const BitFieldInfo FieldInfo) const {
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59.1M
    return getMask(FieldInfo) & (RawData >> FieldInfo[1]);
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  }
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  void init(bool IsPointer, bool IsVector, uint16_t NumElements,
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39.2M
            unsigned SizeInBits, unsigned AddressSpace) {
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39.2M
    this->IsPointer = IsPointer;
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39.2M
    this->IsVector = IsVector;
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39.2M
    if (!IsVector) {
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34.3M
      if (!IsPointer)
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21.4M
        RawData = maskAndShift(SizeInBits, ScalarSizeFieldInfo);
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12.8M
      else
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12.8M
        RawData = maskAndShift(SizeInBits, PointerSizeFieldInfo) |
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12.8M
                  maskAndShift(AddressSpace, PointerAddressSpaceFieldInfo);
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34.3M
    } else {
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4.90M
      assert(NumElements > 1 && "invalid number of vector elements");
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4.90M
      if (!IsPointer)
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4.90M
        RawData = maskAndShift(NumElements, VectorElementsFieldInfo) |
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4.90M
                  maskAndShift(SizeInBits, VectorSizeFieldInfo);
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      else
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        RawData =
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            maskAndShift(NumElements, PointerVectorElementsFieldInfo) |
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            maskAndShift(SizeInBits, PointerVectorSizeFieldInfo) |
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            maskAndShift(AddressSpace, PointerVectorAddressSpaceFieldInfo);
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4.90M
    }
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39.2M
  }
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};
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19.2k
inline raw_ostream& operator<<(raw_ostream &OS, const LLT &Ty) {
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19.2k
  Ty.print(OS);
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19.2k
  return OS;
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19.2k
}
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template<> struct DenseMapInfo<LLT> {
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12.3M
  static inline LLT getEmptyKey() {
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12.3M
    LLT Invalid;
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12.3M
    Invalid.IsPointer = true;
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12.3M
    return Invalid;
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12.3M
  }
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8.91M
  static inline LLT getTombstoneKey() {
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8.91M
    LLT Invalid;
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8.91M
    Invalid.IsVector = true;
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8.91M
    return Invalid;
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8.91M
  }
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5.62M
  static inline unsigned getHashValue(const LLT &Ty) {
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5.62M
    uint64_t Val = ((uint64_t)Ty.RawData) << 2 | ((uint64_t)Ty.IsPointer) << 1 |
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5.62M
                   ((uint64_t)Ty.IsVector);
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5.62M
    return DenseMapInfo<uint64_t>::getHashValue(Val);
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5.62M
  }
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101M
  static bool isEqual(const LLT &LHS, const LLT &RHS) {
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101M
    return LHS == RHS;
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101M
  }
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};
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}
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#endif // LLVM_SUPPORT_LOWLEVELTYPEIMPL_H