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1//===-- Bitcode/Reader/ValueList.h - Number values --------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This class gives values and types Unique ID's.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_LIB_BITCODE_READER_VALUELIST_H14#define LLVM_LIB_BITCODE_READER_VALUELIST_H15 16#include "llvm/IR/ValueHandle.h"17#include "llvm/Support/Error.h"18#include <cassert>19#include <utility>20#include <vector>21 22namespace llvm {23 24class Error;25class Type;26class Value;27 28class BitcodeReaderValueList {29 /// Maps Value ID to pair of Value* and Type ID.30 std::vector<std::pair<WeakTrackingVH, unsigned>> ValuePtrs;31 32 /// Maximum number of valid references. Forward references exceeding the33 /// maximum must be invalid.34 unsigned RefsUpperBound;35 36 using MaterializeValueFnTy =37 std::function<Expected<Value *>(unsigned, BasicBlock *)>;38 MaterializeValueFnTy MaterializeValueFn;39 40public:41 BitcodeReaderValueList(size_t RefsUpperBound,42 MaterializeValueFnTy MaterializeValueFn)43 : RefsUpperBound(std::min((size_t)std::numeric_limits<unsigned>::max(),44 RefsUpperBound)),45 MaterializeValueFn(MaterializeValueFn) {}46 47 // vector compatibility methods48 unsigned size() const { return ValuePtrs.size(); }49 void resize(unsigned N) {50 ValuePtrs.resize(N);51 }52 void push_back(Value *V, unsigned TypeID) {53 ValuePtrs.emplace_back(V, TypeID);54 }55 56 void clear() {57 ValuePtrs.clear();58 }59 60 Value *operator[](unsigned i) const {61 assert(i < ValuePtrs.size());62 return ValuePtrs[i].first;63 }64 65 unsigned getTypeID(unsigned ValNo) const {66 assert(ValNo < ValuePtrs.size());67 return ValuePtrs[ValNo].second;68 }69 70 Value *back() const { return ValuePtrs.back().first; }71 void pop_back() {72 ValuePtrs.pop_back();73 }74 bool empty() const { return ValuePtrs.empty(); }75 76 void shrinkTo(unsigned N) {77 assert(N <= size() && "Invalid shrinkTo request!");78 ValuePtrs.resize(N);79 }80 81 void replaceValueWithoutRAUW(unsigned ValNo, Value *NewV) {82 assert(ValNo < ValuePtrs.size());83 ValuePtrs[ValNo].first = NewV;84 }85 86 Value *getValueFwdRef(unsigned Idx, Type *Ty, unsigned TyID,87 BasicBlock *ConstExprInsertBB);88 89 Error assignValue(unsigned Idx, Value *V, unsigned TypeID);90};91 92} // end namespace llvm93 94#endif // LLVM_LIB_BITCODE_READER_VALUELIST_H95