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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89793 91177308-0d34-0410-b5e6-96231b3b80d8
426 lines
16 KiB
C++
426 lines
16 KiB
C++
//===-- llvm/CodeGen/AsmPrinter.h - AsmPrinter Framework --------*- 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 file contains a class to be used as the base class for target specific
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// asm writers. This class primarily handles common functionality used by
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// all asm writers.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_ASMPRINTER_H
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#define LLVM_CODEGEN_ASMPRINTER_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/Support/DebugLoc.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/ADT/DenseMap.h"
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namespace llvm {
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class BlockAddress;
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class GCStrategy;
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class Constant;
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class ConstantArray;
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class ConstantFP;
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class ConstantInt;
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class ConstantStruct;
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class ConstantVector;
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class GCMetadataPrinter;
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class GlobalValue;
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class GlobalVariable;
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class MachineBasicBlock;
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class MachineFunction;
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class MachineInstr;
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class MachineLoopInfo;
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class MachineLoop;
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class MachineConstantPool;
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class MachineConstantPoolEntry;
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class MachineConstantPoolValue;
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class MachineJumpTableInfo;
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class MachineModuleInfo;
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class MCInst;
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class MCContext;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class DwarfWriter;
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class Mangler;
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class MCAsmInfo;
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class TargetLoweringObjectFile;
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class Type;
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class formatted_raw_ostream;
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/// AsmPrinter - This class is intended to be used as a driving class for all
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/// asm writers.
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class AsmPrinter : public MachineFunctionPass {
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static char ID;
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/// FunctionNumber - This provides a unique ID for each function emitted in
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/// this translation unit. It is autoincremented by SetupMachineFunction,
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/// and can be accessed with getFunctionNumber() and
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/// IncrementFunctionNumber().
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///
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unsigned FunctionNumber;
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// GCMetadataPrinters - The garbage collection metadata printer table.
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typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type;
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typedef gcp_map_type::iterator gcp_iterator;
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gcp_map_type GCMetadataPrinters;
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/// If VerboseAsm is set, a pointer to the loop info for this
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/// function.
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///
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MachineLoopInfo *LI;
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public:
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/// MMI - If available, this is a pointer to the current MachineModuleInfo.
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MachineModuleInfo *MMI;
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protected:
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/// DW - If available, this is a pointer to the current dwarf writer.
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DwarfWriter *DW;
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public:
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/// Flags to specify different kinds of comments to output in
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/// assembly code. These flags carry semantic information not
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/// otherwise easily derivable from the IR text.
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///
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enum CommentFlag {
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ReloadReuse = 0x1
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};
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/// Output stream on which we're printing assembly code.
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///
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formatted_raw_ostream &O;
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/// Target machine description.
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///
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TargetMachine &TM;
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/// getObjFileLowering - Return information about object file lowering.
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TargetLoweringObjectFile &getObjFileLowering() const;
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/// Target Asm Printer information.
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///
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const MCAsmInfo *MAI;
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/// Target Register Information.
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///
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const TargetRegisterInfo *TRI;
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/// OutContext - This is the context for the output file that we are
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/// streaming. This owns all of the global MC-related objects for the
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/// generated translation unit.
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MCContext &OutContext;
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/// OutStreamer - This is the MCStreamer object for the file we are
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/// generating. This contains the transient state for the current
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/// translation unit that we are generating (such as the current section
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/// etc).
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MCStreamer &OutStreamer;
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/// The current machine function.
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const MachineFunction *MF;
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/// Name-mangler for global names.
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///
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Mangler *Mang;
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/// Cache of mangled name for current function. This is recalculated at the
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/// beginning of each call to runOnMachineFunction().
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///
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std::string CurrentFnName;
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/// getCurrentSection() - Return the current section we are emitting to.
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const MCSection *getCurrentSection() const;
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/// VerboseAsm - Emit comments in assembly output if this is true.
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///
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bool VerboseAsm;
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/// Private state for PrintSpecial()
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// Assign a unique ID to this machine instruction.
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mutable const MachineInstr *LastMI;
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mutable const Function *LastFn;
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mutable unsigned Counter;
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// Private state for processDebugLoc()
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mutable DebugLocTuple PrevDLT;
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protected:
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explicit AsmPrinter(formatted_raw_ostream &o, TargetMachine &TM,
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const MCAsmInfo *T, bool V);
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public:
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virtual ~AsmPrinter();
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/// isVerbose - Return true if assembly output should contain comments.
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///
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bool isVerbose() const { return VerboseAsm; }
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/// getFunctionNumber - Return a unique ID for the current function.
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///
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unsigned getFunctionNumber() const { return FunctionNumber; }
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protected:
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/// getAnalysisUsage - Record analysis usage.
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///
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void getAnalysisUsage(AnalysisUsage &AU) const;
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/// doInitialization - Set up the AsmPrinter when we are working on a new
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/// module. If your pass overrides this, it must make sure to explicitly
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/// call this implementation.
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bool doInitialization(Module &M);
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/// EmitStartOfAsmFile - This virtual method can be overridden by targets
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/// that want to emit something at the start of their file.
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virtual void EmitStartOfAsmFile(Module &) {}
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/// EmitEndOfAsmFile - This virtual method can be overridden by targets that
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/// want to emit something at the end of their file.
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virtual void EmitEndOfAsmFile(Module &) {}
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/// doFinalization - Shut down the asmprinter. If you override this in your
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/// pass, you must make sure to call it explicitly.
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bool doFinalization(Module &M);
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/// PrintSpecial - Print information related to the specified machine instr
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/// that is independent of the operand, and may be independent of the instr
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/// itself. This can be useful for portably encoding the comment character
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/// or other bits of target-specific knowledge into the asmstrings. The
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/// syntax used is ${:comment}. Targets can override this to add support
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/// for their own strange codes.
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virtual void PrintSpecial(const MachineInstr *MI, const char *Code) const;
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/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
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/// instruction, using the specified assembler variant. Targets should
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/// override this to format as appropriate. This method can return true if
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/// the operand is erroneous.
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virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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unsigned AsmVariant, const char *ExtraCode);
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/// PrintAsmMemoryOperand - Print the specified operand of MI, an INLINEASM
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/// instruction, using the specified assembler variant as an address.
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/// Targets should override this to format as appropriate. This method can
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/// return true if the operand is erroneous.
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virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
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unsigned AsmVariant,
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const char *ExtraCode);
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/// PrintGlobalVariable - Emit the specified global variable and its
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/// initializer to the output stream.
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virtual void PrintGlobalVariable(const GlobalVariable *GV) = 0;
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/// SetupMachineFunction - This should be called when a new MachineFunction
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/// is being processed from runOnMachineFunction.
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void SetupMachineFunction(MachineFunction &MF);
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/// IncrementFunctionNumber - Increase Function Number. AsmPrinters should
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/// not normally call this, as the counter is automatically bumped by
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/// SetupMachineFunction.
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void IncrementFunctionNumber() { FunctionNumber++; }
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/// EmitConstantPool - Print to the current output stream assembly
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/// representations of the constants in the constant pool MCP. This is
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/// used to print out constants which have been "spilled to memory" by
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/// the code generator.
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///
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void EmitConstantPool(MachineConstantPool *MCP);
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/// EmitJumpTableInfo - Print assembly representations of the jump tables
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/// used by the current function to the current output stream.
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///
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void EmitJumpTableInfo(MachineJumpTableInfo *MJTI, MachineFunction &MF);
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/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
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/// special global used by LLVM. If so, emit it and return true, otherwise
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/// do nothing and return false.
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bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
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public:
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//===------------------------------------------------------------------===//
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/// LEB 128 number encoding.
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/// PrintULEB128 - Print a series of hexidecimal values(separated by commas)
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/// representing an unsigned leb128 value.
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void PrintULEB128(unsigned Value) const;
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/// PrintSLEB128 - Print a series of hexidecimal values(separated by commas)
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/// representing a signed leb128 value.
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void PrintSLEB128(int Value) const;
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//===------------------------------------------------------------------===//
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// Emission and print routines
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//
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/// PrintHex - Print a value as a hexidecimal value.
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///
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void PrintHex(int Value) const;
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/// EOL - Print a newline character to asm stream. If a comment is present
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/// then it will be printed first. Comments should not contain '\n'.
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void EOL() const;
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void EOL(const std::string &Comment) const;
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void EOL(const char* Comment) const;
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void EOL(const char *Comment, unsigned Encoding) const;
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/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
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/// unsigned leb128 value.
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void EmitULEB128Bytes(unsigned Value) const;
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/// EmitSLEB128Bytes - print an assembler byte data directive to compose a
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/// signed leb128 value.
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void EmitSLEB128Bytes(int Value) const;
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/// EmitInt8 - Emit a byte directive and value.
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///
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void EmitInt8(int Value) const;
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/// EmitInt16 - Emit a short directive and value.
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///
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void EmitInt16(int Value) const;
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/// EmitInt32 - Emit a long directive and value.
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///
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void EmitInt32(int Value) const;
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/// EmitInt64 - Emit a long long directive and value.
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///
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void EmitInt64(uint64_t Value) const;
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/// EmitString - Emit a string with quotes and a null terminator.
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/// Special characters are emitted properly.
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/// @verbatim (Eg. '\t') @endverbatim
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void EmitString(const StringRef String) const;
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void EmitString(const char *String, unsigned Size) const;
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/// EmitFile - Emit a .file directive.
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void EmitFile(unsigned Number, const std::string &Name) const;
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//===------------------------------------------------------------------===//
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/// EmitAlignment - Emit an alignment directive to the specified power of
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/// two boundary. For example, if you pass in 3 here, you will get an 8
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/// byte alignment. If a global value is specified, and if that global has
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/// an explicit alignment requested, it will unconditionally override the
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/// alignment request. However, if ForcedAlignBits is specified, this value
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/// has final say: the ultimate alignment will be the max of ForcedAlignBits
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/// and the alignment computed with NumBits and the global. If UseFillExpr
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/// is true, it also emits an optional second value FillValue which the
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/// assembler uses to fill gaps to match alignment for text sections if the
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/// has specified a non-zero fill value.
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///
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/// The algorithm is:
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/// Align = NumBits;
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/// if (GV && GV->hasalignment) Align = GV->getalignment();
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/// Align = std::max(Align, ForcedAlignBits);
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///
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void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0,
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unsigned ForcedAlignBits = 0,
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bool UseFillExpr = true) const;
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/// printLabel - This method prints a local label used by debug and
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/// exception handling tables.
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void printLabel(const MachineInstr *MI) const;
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void printLabel(unsigned Id) const;
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/// printDeclare - This method prints a local variable declaration used by
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/// debug tables.
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void printDeclare(const MachineInstr *MI) const;
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/// EmitComments - Pretty-print comments for instructions
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void EmitComments(const MachineInstr &MI) const;
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/// EmitComments - Pretty-print comments for basic blocks
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void EmitComments(const MachineBasicBlock &MBB) const;
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/// GetMBBSymbol - Return the MCSymbol corresponding to the specified basic
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/// block label.
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MCSymbol *GetMBBSymbol(unsigned MBBID) const;
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/// GetBlockAddressSymbol - Return the MCSymbol used to satisfy BlockAddress
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/// uses of the specified basic block.
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MCSymbol *GetBlockAddressSymbol(const BlockAddress *BA,
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const char *Suffix = "") const;
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MCSymbol *GetBlockAddressSymbol(const Function *F,
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const BasicBlock *BB,
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const char *Suffix = "") const;
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/// EmitBasicBlockStart - This method prints the label for the specified
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/// MachineBasicBlock, an alignment (if present) and a comment describing
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/// it if appropriate.
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void EmitBasicBlockStart(const MachineBasicBlock *MBB) const;
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protected:
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/// EmitZeros - Emit a block of zeros.
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///
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void EmitZeros(uint64_t NumZeros, unsigned AddrSpace = 0) const;
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/// EmitString - Emit a zero-byte-terminated string constant.
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///
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virtual void EmitString(const ConstantArray *CVA) const;
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/// EmitConstantValueOnly - Print out the specified constant, without a
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/// storage class. Only constants of first-class type are allowed here.
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void EmitConstantValueOnly(const Constant *CV);
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/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
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void EmitGlobalConstant(const Constant* CV, unsigned AddrSpace = 0);
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virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
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/// processDebugLoc - Processes the debug information of each machine
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/// instruction's DebugLoc.
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void processDebugLoc(const MachineInstr *MI, bool BeforePrintingInsn);
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/// printInlineAsm - This method formats and prints the specified machine
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/// instruction that is an inline asm.
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void printInlineAsm(const MachineInstr *MI) const;
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/// printImplicitDef - This method prints the specified machine instruction
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/// that is an implicit def.
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void printImplicitDef(const MachineInstr *MI) const;
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/// printKill - This method prints the specified kill machine instruction.
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void printKill(const MachineInstr *MI) const;
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/// printPICJumpTableSetLabel - This method prints a set label for the
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/// specified MachineBasicBlock for a jumptable entry.
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virtual void printPICJumpTableSetLabel(unsigned uid,
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const MachineBasicBlock *MBB) const;
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virtual void printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
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const MachineBasicBlock *MBB) const;
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virtual void printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
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const MachineBasicBlock *MBB,
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unsigned uid) const;
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/// printDataDirective - This method prints the asm directive for the
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/// specified type.
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void printDataDirective(const Type *type, unsigned AddrSpace = 0);
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/// printVisibility - This prints visibility information about symbol, if
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/// this is suported by the target.
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void printVisibility(const std::string& Name, unsigned Visibility) const;
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/// printOffset - This is just convenient handler for printing offsets.
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void printOffset(int64_t Offset) const;
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private:
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void EmitLLVMUsedList(Constant *List);
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void EmitXXStructorList(Constant *List);
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void EmitGlobalConstantStruct(const ConstantStruct* CVS,
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unsigned AddrSpace);
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void EmitGlobalConstantArray(const ConstantArray* CVA, unsigned AddrSpace);
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void EmitGlobalConstantVector(const ConstantVector* CP);
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void EmitGlobalConstantFP(const ConstantFP* CFP, unsigned AddrSpace);
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void EmitGlobalConstantLargeInt(const ConstantInt* CI, unsigned AddrSpace);
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GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy *C);
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};
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}
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#endif
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