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📄 Argument.h(5.03 KB)
📄 AssemblyAnnotationWriter.h(2.2 KB)
📄 Attributes.h(35.5 KB)
📄 Attributes.td(8.96 KB)
📄 AutoUpgrade.h(3.96 KB)
📄 BasicBlock.h(21.91 KB)
📄 CFG.h(13.84 KB)
📄 CallingConv.h(9.27 KB)
📄 Comdat.h(2.16 KB)
📄 Constant.h(8.33 KB)
📄 ConstantFolder.h(10.01 KB)
📄 ConstantRange.h(21.6 KB)
📄 Constants.h(53.03 KB)
📄 ConstrainedOps.def(5.4 KB)
📄 DIBuilder.h(44.36 KB)
📄 DataLayout.h(24.11 KB)
📄 DebugInfo.h(5.42 KB)
📄 DebugInfoFlags.def(3.62 KB)
📄 DebugInfoMetadata.h(132.91 KB)
📄 DebugLoc.h(4.57 KB)
📄 DerivedTypes.h(26.81 KB)
📄 DerivedUser.h(1.32 KB)
📄 DiagnosticHandler.h(2.89 KB)
📄 DiagnosticInfo.h(41.02 KB)
📄 DiagnosticPrinter.h(3.46 KB)
📄 Dominators.h(9.94 KB)
📄 FPEnv.h(1.97 KB)
📄 FixedMetadataKinds.def(2.05 KB)
📄 Function.h(31.39 KB)
📄 GVMaterializer.h(1.45 KB)
📄 GetElementPtrTypeIterator.h(5.54 KB)
📄 GlobalAlias.h(3.16 KB)
📄 GlobalIFunc.h(2.51 KB)
📄 GlobalIndirectSymbol.h(3.11 KB)
📄 GlobalObject.h(7.39 KB)
📄 GlobalValue.h(21.2 KB)
📄 GlobalVariable.h(9.6 KB)
📄 IRBuilder.h(105.58 KB)
📄 IRBuilderFolder.h(7.1 KB)
📄 IRPrintingPasses.h(3.57 KB)
📄 InlineAsm.h(15.84 KB)
📄 InstIterator.h(5.06 KB)
📄 InstVisitor.h(13.95 KB)
📄 InstrTypes.h(86.25 KB)
📄 Instruction.def(8.53 KB)
📄 Instruction.h(30.74 KB)
📄 Instructions.h(195.68 KB)
📄 IntrinsicInst.h(29.03 KB)
📄 Intrinsics.h(8.21 KB)
📄 Intrinsics.td(78.88 KB)
📄 IntrinsicsAArch64.td(100.59 KB)
📄 IntrinsicsAMDGPU.td(80.43 KB)
📄 IntrinsicsARM.td(65.15 KB)
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📄 IntrinsicsHexagon.td(11.53 KB)
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📄 IntrinsicsPowerPC.td(68.23 KB)
📄 IntrinsicsRISCV.td(3.24 KB)
📄 IntrinsicsSystemZ.td(18.56 KB)
📄 IntrinsicsWebAssembly.td(9.38 KB)
📄 IntrinsicsX86.td(242.99 KB)
📄 IntrinsicsXCore.td(6.83 KB)
📄 LLVMContext.h(14.18 KB)
📄 LLVMRemarkStreamer.h(3.36 KB)
📄 LegacyPassManager.h(3.11 KB)
📄 LegacyPassManagers.h(18.17 KB)
📄 LegacyPassNameParser.h(3.73 KB)
📄 MDBuilder.h(8.65 KB)
📄 Mangler.h(2.06 KB)
📄 MatrixBuilder.h(8.81 KB)
📄 Metadata.def(5.07 KB)
📄 Metadata.h(45.24 KB)
📄 Module.h(34.6 KB)
📄 ModuleSlotTracker.h(2.56 KB)
📄 ModuleSummaryIndex.h(58.12 KB)
📄 ModuleSummaryIndexYAML.h(10.93 KB)
📄 NoFolder.h(11.32 KB)
📄 OperandTraits.h(5.78 KB)
📄 Operator.h(19.58 KB)
📄 OptBisect.h(2.79 KB)
📄 PassInstrumentation.h(8.05 KB)
📄 PassManager.h(54.18 KB)
📄 PassManagerImpl.h(5.76 KB)
📄 PassManagerInternal.h(11.9 KB)
📄 PassTimingInfo.h(3.65 KB)
📄 PatternMatch.h(73.41 KB)
📄 PredIteratorCache.h(2.59 KB)
📄 ProfileSummary.h(4.34 KB)
📄 RuntimeLibcalls.def(24.52 KB)
📄 SafepointIRVerifier.h(1.63 KB)
📄 Statepoint.h(13.61 KB)
📄 SymbolTableListTraits.h(4.45 KB)
📄 TrackingMDRef.h(4.5 KB)
📄 Type.h(18.98 KB)
📄 TypeFinder.h(2.57 KB)
📄 Use.h(3.75 KB)
📄 UseListOrder.h(1.18 KB)
📄 User.h(11.75 KB)
📄 VPIntrinsics.def(2.34 KB)
📄 Value.def(3.62 KB)
📄 Value.h(32.16 KB)
📄 ValueHandle.h(18.11 KB)
📄 ValueMap.h(14.09 KB)
📄 ValueSymbolTable.h(4.22 KB)
📄 Verifier.h(5.47 KB)

Editing: GetElementPtrTypeIterator.h

//===- GetElementPtrTypeIterator.h ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements an iterator for walking through the types indexed by
// getelementptr instructions.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_GETELEMENTPTRTYPEITERATOR_H
#define LLVM_IR_GETELEMENTPTRTYPEITERATOR_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/User.h"
#include "llvm/Support/Casting.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iterator>

namespace llvm {

template<typename ItTy = User::const_op_iterator>
  class generic_gep_type_iterator
    : public std::iterator<std::forward_iterator_tag, Type *, ptrdiff_t> {
    using super = std::iterator<std::forward_iterator_tag, Type *, ptrdiff_t>;

ItTy OpIt;
    PointerUnion<StructType *, Type *> CurTy;
    enum : uint64_t { Unbounded = -1ull };
    uint64_t NumElements = Unbounded;

generic_gep_type_iterator() = default;

public:
    static generic_gep_type_iterator begin(Type *Ty, ItTy It) {
      generic_gep_type_iterator I;
      I.CurTy = Ty;
      I.OpIt = It;
      return I;
    }

static generic_gep_type_iterator end(ItTy It) {
      generic_gep_type_iterator I;
      I.OpIt = It;
      return I;
    }

bool operator==(const generic_gep_type_iterator& x) const {
      return OpIt == x.OpIt;
    }

bool operator!=(const generic_gep_type_iterator& x) const {
      return !operator==(x);
    }

// FIXME: Make this the iterator's operator*() after the 4.0 release.
    // operator*() had a different meaning in earlier releases, so we're
    // temporarily not giving this iterator an operator*() to avoid a subtle
    // semantics break.
    Type *getIndexedType() const {
      if (auto *T = CurTy.dyn_cast<Type *>())
        return T;
      return CurTy.get<StructType *>()->getTypeAtIndex(getOperand());
    }

Value *getOperand() const { return const_cast<Value *>(&**OpIt); }

generic_gep_type_iterator& operator++() {   // Preincrement
      Type *Ty = getIndexedType();
      if (auto *ATy = dyn_cast<ArrayType>(Ty)) {
        CurTy = ATy->getElementType();
        NumElements = ATy->getNumElements();
      } else if (auto *VTy = dyn_cast<VectorType>(Ty)) {
        CurTy = VTy->getElementType();
        if (isa<ScalableVectorType>(VTy))
          NumElements = Unbounded;
        else
          NumElements = VTy->getNumElements();
      } else
        CurTy = dyn_cast<StructType>(Ty);
      ++OpIt;
      return *this;
    }

generic_gep_type_iterator operator++(int) { // Postincrement
      generic_gep_type_iterator tmp = *this; ++*this; return tmp;
    }

// All of the below API is for querying properties of the "outer type", i.e.
    // the type that contains the indexed type. Most of the time this is just
    // the type that was visited immediately prior to the indexed type, but for
    // the first element this is an unbounded array of the GEP's source element
    // type, for which there is no clearly corresponding IR type (we've
    // historically used a pointer type as the outer type in this case, but
    // pointers will soon lose their element type).
    //
    // FIXME: Most current users of this class are just interested in byte
    // offsets (a few need to know whether the outer type is a struct because
    // they are trying to replace a constant with a variable, which is only
    // legal for arrays, e.g. canReplaceOperandWithVariable in SimplifyCFG.cpp);
    // we should provide a more minimal API here that exposes not much more than
    // that.

bool isStruct() const { return CurTy.is<StructType *>(); }
    bool isSequential() const { return CurTy.is<Type *>(); }

StructType *getStructType() const { return CurTy.get<StructType *>(); }

StructType *getStructTypeOrNull() const {
      return CurTy.dyn_cast<StructType *>();
    }

bool isBoundedSequential() const {
      return isSequential() && NumElements != Unbounded;
    }

uint64_t getSequentialNumElements() const {
      assert(isBoundedSequential());
      return NumElements;
    }
  };

using gep_type_iterator = generic_gep_type_iterator<>;

inline gep_type_iterator gep_type_begin(const User *GEP) {
    auto *GEPOp = cast<GEPOperator>(GEP);
    return gep_type_iterator::begin(
        GEPOp->getSourceElementType(),
        GEP->op_begin() + 1);
  }

inline gep_type_iterator gep_type_end(const User *GEP) {
    return gep_type_iterator::end(GEP->op_end());
  }

inline gep_type_iterator gep_type_begin(const User &GEP) {
    auto &GEPOp = cast<GEPOperator>(GEP);
    return gep_type_iterator::begin(
        GEPOp.getSourceElementType(),
        GEP.op_begin() + 1);
  }

inline gep_type_iterator gep_type_end(const User &GEP) {
    return gep_type_iterator::end(GEP.op_end());
  }

template<typename T>
  inline generic_gep_type_iterator<const T *>
  gep_type_begin(Type *Op0, ArrayRef<T> A) {
    return generic_gep_type_iterator<const T *>::begin(Op0, A.begin());
  }

template<typename T>
  inline generic_gep_type_iterator<const T *>
  gep_type_end(Type * /*Op0*/, ArrayRef<T> A) {
    return generic_gep_type_iterator<const T *>::end(A.end());
  }

} // end namespace llvm

#endif // LLVM_IR_GETELEMENTPTRTYPEITERATOR_H

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