| //===- llvm/IR/Comdat.h - Comdat definitions --------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// @file |
| /// This file contains the declaration of the Comdat class, which represents a |
| /// single COMDAT in LLVM. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_IR_COMDAT_H |
| #define LLVM_IR_COMDAT_H |
| |
| #include "llvm-c/Types.h" |
| #include "llvm/Support/CBindingWrapping.h" |
| |
| namespace llvm { |
| |
| class raw_ostream; |
| class StringRef; |
| template <typename ValueTy> class StringMapEntry; |
| |
| // This is a Name X SelectionKind pair. The reason for having this be an |
| // independent object instead of just adding the name and the SelectionKind |
| // to a GlobalObject is that it is invalid to have two Comdats with the same |
| // name but different SelectionKind. This structure makes that unrepresentable. |
| class Comdat { |
| public: |
| enum SelectionKind { |
| Any, ///< The linker may choose any COMDAT. |
| ExactMatch, ///< The data referenced by the COMDAT must be the same. |
| Largest, ///< The linker will choose the largest COMDAT. |
| NoDuplicates, ///< No other Module may specify this COMDAT. |
| SameSize, ///< The data referenced by the COMDAT must be the same size. |
| }; |
| |
| Comdat(const Comdat &) = delete; |
| Comdat(Comdat &&C); |
| |
| SelectionKind getSelectionKind() const { return SK; } |
| void setSelectionKind(SelectionKind Val) { SK = Val; } |
| StringRef getName() const; |
| void print(raw_ostream &OS, bool IsForDebug = false) const; |
| void dump() const; |
| |
| private: |
| friend class Module; |
| |
| Comdat(); |
| |
| // Points to the map in Module. |
| StringMapEntry<Comdat> *Name = nullptr; |
| SelectionKind SK = Any; |
| }; |
| |
| // Create wrappers for C Binding types (see CBindingWrapping.h). |
| DEFINE_SIMPLE_CONVERSION_FUNCTIONS(Comdat, LLVMComdatRef) |
| |
| inline raw_ostream &operator<<(raw_ostream &OS, const Comdat &C) { |
| C.print(OS); |
| return OS; |
| } |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_IR_COMDAT_H |