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This new IR facility allows us to represent the object-file semantic of a COMDAT group. COMDATs allow us to tie together sections and make the inclusion of one dependent on another. This is required to implement features like MS ABI VFTables and optimizing away certain kinds of initialization in C++. This functionality is only representable in COFF and ELF, Mach-O has no similar mechanism. Differential Revision: http://reviews.llvm.org/D4178 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211920 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
3.7 KiB
C++
125 lines
3.7 KiB
C++
//===-- llvm/IR/AsmWriter.h - Printing LLVM IR as an assembly file - 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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// This files defines the interface for the AssemblyWriter class used to print
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// LLVM IR and various helper classes that are used in printing.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_ASSEMBLYWRITER_H
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#define LLVM_IR_ASSEMBLYWRITER_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/IR/Attributes.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/TypeFinder.h"
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#include "llvm/Support/FormattedStream.h"
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namespace llvm {
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class BasicBlock;
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class Function;
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class GlobalValue;
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class Comdat;
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class Module;
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class NamedMDNode;
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class Value;
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class SlotTracker;
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/// Create a new SlotTracker for a Module
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SlotTracker *createSlotTracker(const Module *M);
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//===----------------------------------------------------------------------===//
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// TypePrinting Class: Type printing machinery
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//===----------------------------------------------------------------------===//
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class TypePrinting {
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TypePrinting(const TypePrinting &) LLVM_DELETED_FUNCTION;
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void operator=(const TypePrinting&) LLVM_DELETED_FUNCTION;
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public:
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/// NamedTypes - The named types that are used by the current module.
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TypeFinder NamedTypes;
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/// NumberedTypes - The numbered types, along with their value.
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DenseMap<StructType*, unsigned> NumberedTypes;
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TypePrinting() {}
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~TypePrinting() {}
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void incorporateTypes(const Module &M);
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void print(Type *Ty, raw_ostream &OS);
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void printStructBody(StructType *Ty, raw_ostream &OS);
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};
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class AssemblyWriter {
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protected:
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formatted_raw_ostream &Out;
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const Module *TheModule;
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private:
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std::unique_ptr<SlotTracker> ModuleSlotTracker;
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SlotTracker &Machine;
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TypePrinting TypePrinter;
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AssemblyAnnotationWriter *AnnotationWriter;
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SetVector<const Comdat *> Comdats;
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public:
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/// Construct an AssemblyWriter with an external SlotTracker
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AssemblyWriter(formatted_raw_ostream &o, SlotTracker &Mac,
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const Module *M, AssemblyAnnotationWriter *AAW);
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/// Construct an AssemblyWriter with an internally allocated SlotTracker
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AssemblyWriter(formatted_raw_ostream &o, const Module *M,
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AssemblyAnnotationWriter *AAW);
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virtual ~AssemblyWriter();
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void printMDNodeBody(const MDNode *MD);
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void printNamedMDNode(const NamedMDNode *NMD);
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void printModule(const Module *M);
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void writeOperand(const Value *Op, bool PrintType);
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void writeParamOperand(const Value *Operand, AttributeSet Attrs,unsigned Idx);
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void writeAtomic(AtomicOrdering Ordering, SynchronizationScope SynchScope);
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void writeAtomicCmpXchg(AtomicOrdering SuccessOrdering,
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AtomicOrdering FailureOrdering,
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SynchronizationScope SynchScope);
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void writeAllMDNodes();
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void writeMDNode(unsigned Slot, const MDNode *Node);
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void writeAllAttributeGroups();
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void printTypeIdentities();
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void printGlobal(const GlobalVariable *GV);
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void printAlias(const GlobalAlias *GV);
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void printComdat(const Comdat *C);
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void printFunction(const Function *F);
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void printArgument(const Argument *FA, AttributeSet Attrs, unsigned Idx);
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void printBasicBlock(const BasicBlock *BB);
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void printInstructionLine(const Instruction &I);
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void printInstruction(const Instruction &I);
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private:
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void init();
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// printInfoComment - Print a little comment after the instruction indicating
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// which slot it occupies.
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void printInfoComment(const Value &V);
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};
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} // namespace llvm
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#endif //LLVM_IR_ASMWRITER_H
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