| //===-- Bitcode/Reader/ValueList.h - Number values --------------*- 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 class gives values and types Unique ID's. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_BITCODE_READER_VALUELIST_H |
| #define LLVM_LIB_BITCODE_READER_VALUELIST_H |
| |
| #include "llvm/IR/ValueHandle.h" |
| #include "llvm/Support/Error.h" |
| #include <cassert> |
| #include <utility> |
| #include <vector> |
| |
| namespace llvm { |
| |
| class Error; |
| class Type; |
| class Value; |
| |
| class BitcodeReaderValueList { |
| /// Maps Value ID to pair of Value* and Type ID. |
| std::vector<std::pair<WeakTrackingVH, unsigned>> ValuePtrs; |
| |
| /// Maximum number of valid references. Forward references exceeding the |
| /// maximum must be invalid. |
| unsigned RefsUpperBound; |
| |
| using MaterializeValueFnTy = |
| std::function<Expected<Value *>(unsigned, BasicBlock *)>; |
| MaterializeValueFnTy MaterializeValueFn; |
| |
| public: |
| BitcodeReaderValueList(size_t RefsUpperBound, |
| MaterializeValueFnTy MaterializeValueFn) |
| : RefsUpperBound(std::min((size_t)std::numeric_limits<unsigned>::max(), |
| RefsUpperBound)), |
| MaterializeValueFn(MaterializeValueFn) {} |
| |
| // vector compatibility methods |
| unsigned size() const { return ValuePtrs.size(); } |
| void resize(unsigned N) { |
| ValuePtrs.resize(N); |
| } |
| void push_back(Value *V, unsigned TypeID) { |
| ValuePtrs.emplace_back(V, TypeID); |
| } |
| |
| void clear() { |
| ValuePtrs.clear(); |
| } |
| |
| Value *operator[](unsigned i) const { |
| assert(i < ValuePtrs.size()); |
| return ValuePtrs[i].first; |
| } |
| |
| unsigned getTypeID(unsigned ValNo) const { |
| assert(ValNo < ValuePtrs.size()); |
| return ValuePtrs[ValNo].second; |
| } |
| |
| Value *back() const { return ValuePtrs.back().first; } |
| void pop_back() { |
| ValuePtrs.pop_back(); |
| } |
| bool empty() const { return ValuePtrs.empty(); } |
| |
| void shrinkTo(unsigned N) { |
| assert(N <= size() && "Invalid shrinkTo request!"); |
| ValuePtrs.resize(N); |
| } |
| |
| void replaceValueWithoutRAUW(unsigned ValNo, Value *NewV) { |
| assert(ValNo < ValuePtrs.size()); |
| ValuePtrs[ValNo].first = NewV; |
| } |
| |
| Value *getValueFwdRef(unsigned Idx, Type *Ty, unsigned TyID, |
| BasicBlock *ConstExprInsertBB); |
| |
| Error assignValue(unsigned Idx, Value *V, unsigned TypeID); |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_LIB_BITCODE_READER_VALUELIST_H |