mirror of
https://github.com/c64scene-ar/llvm-6502.git
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715d98d657
The 'Deprecated' class allows you to specify a SubtargetFeature that the
instruction is deprecated on.
The 'ComplexDeprecationPredicate' class allows you to define a custom
predicate that is called to check for deprecation.
For example:
ComplexDeprecationPredicate<"MCR">
would mean you would have to define the following function:
bool getMCRDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
std::string &Info)
Which returns 'false' for not deprecated, and 'true' for deprecated
and store the warning message in 'Info'.
The MCTargetAsmParser constructor was chaned to take an extra argument of
the MCInstrInfo class, so out-of-tree targets will need to be changed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190598 91177308-0d34-0410-b5e6-96231b3b80d8
496 lines
20 KiB
C++
496 lines
20 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/IR/InlineAsm.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/ErrorHandling.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 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 MachineLocation;
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class MachineLoopInfo;
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class MachineLoop;
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class MachineConstantPoolValue;
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class MachineJumpTableInfo;
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class MachineModuleInfo;
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class MCAsmInfo;
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class MCCFIInstruction;
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class MCContext;
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class MCInstrInfo;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class MDNode;
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class DwarfDebug;
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class DwarfException;
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class Mangler;
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class TargetLoweringObjectFile;
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class DataLayout;
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class TargetMachine;
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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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public:
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/// Target machine description.
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///
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TargetMachine &TM;
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/// Target Asm Printer information.
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///
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const MCAsmInfo *MAI;
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const MCInstrInfo *MII;
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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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/// MMI - This is a pointer to the current MachineModuleInfo.
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MachineModuleInfo *MMI;
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/// Name-mangler for global names.
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///
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Mangler *Mang;
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/// The symbol for the 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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MCSymbol *CurrentFnSym;
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/// The symbol used to represent the start of the current function for the
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/// purpose of calculating its size (e.g. using the .size directive). By
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/// default, this is equal to CurrentFnSym.
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MCSymbol *CurrentFnSymForSize;
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private:
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// GCMetadataPrinters - The garbage collection metadata printer table.
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void *GCMetadataPrinters; // Really a DenseMap.
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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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static char ID;
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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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MachineLoopInfo *LI;
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/// DD - If the target supports dwarf debug info, this pointer is non-null.
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DwarfDebug *DD;
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/// DE - If the target supports dwarf exception info, this pointer is
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/// non-null.
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DwarfException *DE;
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protected:
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explicit AsmPrinter(TargetMachine &TM, MCStreamer &Streamer);
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public:
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virtual ~AsmPrinter();
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const DwarfDebug *getDwarfDebug() const { return DD; }
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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;
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/// getObjFileLowering - Return information about object file lowering.
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const TargetLoweringObjectFile &getObjFileLowering() const;
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/// getDataLayout - Return information about data layout.
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const DataLayout &getDataLayout() const;
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/// getTargetTriple - Return the target triple string.
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StringRef getTargetTriple() const;
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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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//===------------------------------------------------------------------===//
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// MachineFunctionPass Implementation.
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//===------------------------------------------------------------------===//
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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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/// 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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/// runOnMachineFunction - Emit the specified function out to the
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/// OutStreamer.
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virtual bool runOnMachineFunction(MachineFunction &MF) {
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SetupMachineFunction(MF);
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EmitFunctionHeader();
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EmitFunctionBody();
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return false;
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}
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//===------------------------------------------------------------------===//
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// Coarse grained IR lowering routines.
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//===------------------------------------------------------------------===//
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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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/// EmitFunctionHeader - This method emits the header for the current
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/// function.
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void EmitFunctionHeader();
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/// EmitFunctionBody - This method emits the body and trailer for a
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/// function.
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void EmitFunctionBody();
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void emitPrologLabel(const MachineInstr &MI);
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enum CFIMoveType {
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CFI_M_None,
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CFI_M_EH,
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CFI_M_Debug
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};
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CFIMoveType needsCFIMoves();
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bool needsSEHMoves();
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/// needsRelocationsForDwarfStringPool - Specifies whether the object format
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/// expects to use relocations to refer to debug entries. Alternatively we
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/// emit section offsets in bytes from the start of the string pool.
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bool needsRelocationsForDwarfStringPool() const;
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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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virtual void EmitConstantPool();
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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();
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/// EmitGlobalVariable - Emit the specified global variable to the .s file.
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virtual void EmitGlobalVariable(const GlobalVariable *GV);
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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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/// 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 override the alignment request
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/// if required for correctness.
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///
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void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0) 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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/// \brief Print a general LLVM constant to the .s file.
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void EmitGlobalConstant(const Constant *CV);
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//===------------------------------------------------------------------===//
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// Overridable Hooks
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//===------------------------------------------------------------------===//
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// Targets can, or in the case of EmitInstruction, must implement these to
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// customize output.
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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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/// EmitFunctionBodyStart - Targets can override this to emit stuff before
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/// the first basic block in the function.
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virtual void EmitFunctionBodyStart() {}
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/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
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/// the last basic block in the function.
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virtual void EmitFunctionBodyEnd() {}
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/// EmitInstruction - Targets should implement this to emit instructions.
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virtual void EmitInstruction(const MachineInstr *) {
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llvm_unreachable("EmitInstruction not implemented");
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}
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virtual void EmitFunctionEntryLabel();
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virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
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/// EmitXXStructor - Targets can override this to change how global
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/// constants that are part of a C++ static/global constructor list are
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/// emitted.
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virtual void EmitXXStructor(const Constant *CV) {
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EmitGlobalConstant(CV);
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}
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/// isBlockOnlyReachableByFallthough - Return true if the basic block has
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/// exactly one predecessor and the control transfer mechanism between
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/// the predecessor and this block is a fall-through.
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virtual bool
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isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const;
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//===------------------------------------------------------------------===//
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// Symbol Lowering Routines.
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//===------------------------------------------------------------------===//
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public:
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/// GetTempSymbol - Return the MCSymbol corresponding to the assembler
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/// temporary label with the specified stem and unique ID.
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MCSymbol *GetTempSymbol(StringRef Name, unsigned ID) const;
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/// GetTempSymbol - Return an assembler temporary label with the specified
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/// stem.
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MCSymbol *GetTempSymbol(StringRef Name) const;
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/// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with
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/// global value name as its base, with the specified suffix, and where the
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/// symbol is forced to have private linkage if ForcePrivate is true.
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MCSymbol *GetSymbolWithGlobalValueBase(const GlobalValue *GV,
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StringRef Suffix,
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bool ForcePrivate = true) const;
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/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
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/// ExternalSymbol.
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MCSymbol *GetExternalSymbolSymbol(StringRef Sym) const;
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/// GetCPISymbol - Return the symbol for the specified constant pool entry.
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MCSymbol *GetCPISymbol(unsigned CPID) const;
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/// GetJTISymbol - Return the symbol for the specified jump table entry.
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MCSymbol *GetJTISymbol(unsigned JTID, bool isLinkerPrivate = false) const;
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/// GetJTSetSymbol - Return the symbol for the specified jump table .set
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/// FIXME: privatize to AsmPrinter.
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MCSymbol *GetJTSetSymbol(unsigned UID, 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) const;
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MCSymbol *GetBlockAddressSymbol(const BasicBlock *BB) const;
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//===------------------------------------------------------------------===//
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// Emission Helper Routines.
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//===------------------------------------------------------------------===//
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public:
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/// printOffset - This is just convenient handler for printing offsets.
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void printOffset(int64_t Offset, raw_ostream &OS) 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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/// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size
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/// in bytes of the directive is specified by Size and Hi/Lo specify the
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/// labels. This implicitly uses .set if it is available.
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void EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
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unsigned Size) const;
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/// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-Lo"
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/// where the size in bytes of the directive is specified by Size and Hi/Lo
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/// specify the labels. This implicitly uses .set if it is available.
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void EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset,
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const MCSymbol *Lo, unsigned Size) const;
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/// EmitLabelPlusOffset - Emit something like ".long Label+Offset"
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/// where the size in bytes of the directive is specified by Size and Label
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/// specifies the label. This implicitly uses .set if it is available.
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void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
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unsigned Size,
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bool IsSectionRelative = false) const;
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/// EmitLabelReference - Emit something like ".long Label"
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/// where the size in bytes of the directive is specified by Size and Label
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/// specifies the label.
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void EmitLabelReference(const MCSymbol *Label, unsigned Size,
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bool IsSectionRelative = false) const {
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EmitLabelPlusOffset(Label, 0, Size, IsSectionRelative);
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}
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//===------------------------------------------------------------------===//
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// Dwarf Emission Helper Routines
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//===------------------------------------------------------------------===//
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/// EmitSLEB128 - emit the specified signed leb128 value.
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void EmitSLEB128(int64_t Value, const char *Desc = 0) const;
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/// EmitULEB128 - emit the specified unsigned leb128 value.
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void EmitULEB128(uint64_t Value, const char *Desc = 0,
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unsigned PadTo = 0) const;
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/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
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void EmitCFAByte(unsigned Val) const;
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/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an
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/// encoding. If verbose assembly output is enabled, we output comments
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/// describing the encoding. Desc is a string saying what the encoding is
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/// specifying (e.g. "LSDA").
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void EmitEncodingByte(unsigned Val, const char *Desc = 0) const;
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/// GetSizeOfEncodedValue - Return the size of the encoding in bytes.
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unsigned GetSizeOfEncodedValue(unsigned Encoding) const;
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/// EmitReference - Emit reference to a ttype global with a specified encoding.
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void EmitTTypeReference(const GlobalValue *GV, unsigned Encoding) const;
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/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of
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/// its section. This can be done with a special directive if the target
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/// supports it (e.g. cygwin) or by emitting it as an offset from a label at
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/// the start of the section.
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///
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/// SectionLabel is a temporary label emitted at the start of the section
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/// that Label lives in.
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void EmitSectionOffset(const MCSymbol *Label,
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const MCSymbol *SectionLabel) const;
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/// getISAEncoding - Get the value for DW_AT_APPLE_isa. Zero if no isa
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/// encoding specified.
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virtual unsigned getISAEncoding() { return 0; }
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/// EmitDwarfRegOp - Emit dwarf register operation.
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virtual void EmitDwarfRegOp(const MachineLocation &MLoc,
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bool Indirect) const;
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//===------------------------------------------------------------------===//
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// Dwarf Lowering Routines
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//===------------------------------------------------------------------===//
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/// \brief Emit frame instruction to describe the layout of the frame.
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void emitCFIInstruction(const MCCFIInstruction &Inst) const;
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//===------------------------------------------------------------------===//
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// Inline Asm Support
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//===------------------------------------------------------------------===//
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public:
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// These are hooks that targets can override to implement inline asm
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// support. These should probably be moved out of AsmPrinter someday.
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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, raw_ostream &OS,
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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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raw_ostream &OS);
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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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raw_ostream &OS);
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private:
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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 unsigned LastFn;
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mutable unsigned Counter;
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mutable unsigned SetCounter;
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/// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
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void EmitInlineAsm(StringRef Str, const MDNode *LocMDNode = 0,
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InlineAsm::AsmDialect AsmDialect = InlineAsm::AD_ATT) const;
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/// EmitInlineAsm - This method formats and emits the specified machine
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/// instruction that is an inline asm.
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void EmitInlineAsm(const MachineInstr *MI) const;
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//===------------------------------------------------------------------===//
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// Internal Implementation Details
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//===------------------------------------------------------------------===//
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/// EmitVisibility - This emits visibility information about symbol, if
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/// this is suported by the target.
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void EmitVisibility(MCSymbol *Sym, unsigned Visibility,
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bool IsDefinition = true) const;
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void EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const;
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void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
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const MachineBasicBlock *MBB,
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unsigned uid) const;
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void EmitLLVMUsedList(const ConstantArray *InitList);
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void EmitXXStructorList(const Constant *List, bool isCtor);
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GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy *C);
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};
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}
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#endif
|