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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177356 91177308-0d34-0410-b5e6-96231b3b80d8
406 lines
15 KiB
C++
406 lines
15 KiB
C++
//===-- llvm/CodeGen/MachineModuleInfo.h ------------------------*- 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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// Collect meta information for a module. This information should be in a
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// neutral form that can be used by different debugging and exception handling
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// schemes.
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//
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// The organization of information is primarily clustered around the source
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// compile units. The main exception is source line correspondence where
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// inlining may interleave code from various compile units.
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//
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// The following information can be retrieved from the MachineModuleInfo.
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//
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// -- Source directories - Directories are uniqued based on their canonical
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// string and assigned a sequential numeric ID (base 1.)
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// -- Source files - Files are also uniqued based on their name and directory
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// ID. A file ID is sequential number (base 1.)
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// -- Source line correspondence - A vector of file ID, line#, column# triples.
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// A DEBUG_LOCATION instruction is generated by the DAG Legalizer
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// corresponding to each entry in the source line list. This allows a debug
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// emitter to generate labels referenced by debug information tables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEMODULEINFO_H
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#define LLVM_CODEGEN_MACHINEMODULEINFO_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/PointerIntPair.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MachineLocation.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/DebugLoc.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/ValueHandle.h"
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// Forward declarations.
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class Constant;
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class GlobalVariable;
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class MDNode;
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class MMIAddrLabelMap;
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class MachineBasicBlock;
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class MachineFunction;
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class Module;
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class PointerType;
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class StructType;
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//===----------------------------------------------------------------------===//
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/// LandingPadInfo - This structure is used to retain landing pad info for
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/// the current function.
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///
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struct LandingPadInfo {
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MachineBasicBlock *LandingPadBlock; // Landing pad block.
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SmallVector<MCSymbol*, 1> BeginLabels; // Labels prior to invoke.
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SmallVector<MCSymbol*, 1> EndLabels; // Labels after invoke.
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MCSymbol *LandingPadLabel; // Label at beginning of landing pad.
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const Function *Personality; // Personality function.
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std::vector<int> TypeIds; // List of type ids (filters negative)
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explicit LandingPadInfo(MachineBasicBlock *MBB)
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: LandingPadBlock(MBB), LandingPadLabel(0), Personality(0) {}
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};
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//===----------------------------------------------------------------------===//
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/// MachineModuleInfoImpl - This class can be derived from and used by targets
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/// to hold private target-specific information for each Module. Objects of
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/// type are accessed/created with MMI::getInfo and destroyed when the
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/// MachineModuleInfo is destroyed.
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///
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class MachineModuleInfoImpl {
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public:
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typedef PointerIntPair<MCSymbol*, 1, bool> StubValueTy;
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virtual ~MachineModuleInfoImpl();
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typedef std::vector<std::pair<MCSymbol*, StubValueTy> > SymbolListTy;
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protected:
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static SymbolListTy GetSortedStubs(const DenseMap<MCSymbol*, StubValueTy>&);
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};
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//===----------------------------------------------------------------------===//
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/// MachineModuleInfo - This class contains meta information specific to a
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/// module. Queries can be made by different debugging and exception handling
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/// schemes and reformated for specific use.
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///
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class MachineModuleInfo : public ImmutablePass {
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/// Context - This is the MCContext used for the entire code generator.
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MCContext Context;
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/// TheModule - This is the LLVM Module being worked on.
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const Module *TheModule;
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/// ObjFileMMI - This is the object-file-format-specific implementation of
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/// MachineModuleInfoImpl, which lets targets accumulate whatever info they
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/// want.
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MachineModuleInfoImpl *ObjFileMMI;
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/// FrameMoves - List of moves done by a function's prolog. Used to construct
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/// frame maps by debug and exception handling consumers.
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std::vector<MachineMove> FrameMoves;
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/// CompactUnwindEncoding - If the target supports it, this is the compact
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/// unwind encoding. It replaces a function's CIE and FDE.
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uint32_t CompactUnwindEncoding;
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/// LandingPads - List of LandingPadInfo describing the landing pad
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/// information in the current function.
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std::vector<LandingPadInfo> LandingPads;
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/// LPadToCallSiteMap - Map a landing pad's EH symbol to the call site
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/// indexes.
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DenseMap<MCSymbol*, SmallVector<unsigned, 4> > LPadToCallSiteMap;
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/// CallSiteMap - Map of invoke call site index values to associated begin
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/// EH_LABEL for the current function.
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DenseMap<MCSymbol*, unsigned> CallSiteMap;
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/// CurCallSite - The current call site index being processed, if any. 0 if
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/// none.
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unsigned CurCallSite;
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/// TypeInfos - List of C++ TypeInfo used in the current function.
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std::vector<const GlobalVariable *> TypeInfos;
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/// FilterIds - List of typeids encoding filters used in the current function.
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std::vector<unsigned> FilterIds;
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/// FilterEnds - List of the indices in FilterIds corresponding to filter
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/// terminators.
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std::vector<unsigned> FilterEnds;
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/// Personalities - Vector of all personality functions ever seen. Used to
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/// emit common EH frames.
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std::vector<const Function *> Personalities;
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/// UsedFunctions - The functions in the @llvm.used list in a more easily
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/// searchable format. This does not include the functions in
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/// llvm.compiler.used.
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SmallPtrSet<const Function *, 32> UsedFunctions;
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/// AddrLabelSymbols - This map keeps track of which symbol is being used for
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/// the specified basic block's address of label.
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MMIAddrLabelMap *AddrLabelSymbols;
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bool CallsEHReturn;
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bool CallsUnwindInit;
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/// DbgInfoAvailable - True if debugging information is available
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/// in this module.
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bool DbgInfoAvailable;
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/// UsesVAFloatArgument - True if this module calls VarArg function with
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/// floating-point arguments. This is used to emit an undefined reference
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/// to _fltused on Windows targets.
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bool UsesVAFloatArgument;
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public:
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static char ID; // Pass identification, replacement for typeid
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typedef std::pair<unsigned, DebugLoc> UnsignedDebugLocPair;
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typedef SmallVector<std::pair<TrackingVH<MDNode>, UnsignedDebugLocPair>, 4>
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VariableDbgInfoMapTy;
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VariableDbgInfoMapTy VariableDbgInfo;
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MachineModuleInfo(); // DUMMY CONSTRUCTOR, DO NOT CALL.
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// Real constructor.
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MachineModuleInfo(const MCAsmInfo &MAI, const MCRegisterInfo &MRI,
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const MCObjectFileInfo *MOFI);
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~MachineModuleInfo();
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// Initialization and Finalization
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virtual bool doInitialization(Module &);
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virtual bool doFinalization(Module &);
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/// EndFunction - Discard function meta information.
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///
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void EndFunction();
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const MCContext &getContext() const { return Context; }
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MCContext &getContext() { return Context; }
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void setModule(const Module *M) { TheModule = M; }
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const Module *getModule() const { return TheModule; }
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/// getInfo - Keep track of various per-function pieces of information for
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/// backends that would like to do so.
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///
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template<typename Ty>
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Ty &getObjFileInfo() {
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if (ObjFileMMI == 0)
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ObjFileMMI = new Ty(*this);
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return *static_cast<Ty*>(ObjFileMMI);
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}
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template<typename Ty>
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const Ty &getObjFileInfo() const {
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return const_cast<MachineModuleInfo*>(this)->getObjFileInfo<Ty>();
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}
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/// AnalyzeModule - Scan the module for global debug information.
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///
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void AnalyzeModule(const Module &M);
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/// hasDebugInfo - Returns true if valid debug info is present.
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///
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bool hasDebugInfo() const { return DbgInfoAvailable; }
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void setDebugInfoAvailability(bool avail) { DbgInfoAvailable = avail; }
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bool callsEHReturn() const { return CallsEHReturn; }
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void setCallsEHReturn(bool b) { CallsEHReturn = b; }
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bool callsUnwindInit() const { return CallsUnwindInit; }
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void setCallsUnwindInit(bool b) { CallsUnwindInit = b; }
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bool usesVAFloatArgument() const {
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return UsesVAFloatArgument;
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}
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void setUsesVAFloatArgument(bool b) {
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UsesVAFloatArgument = b;
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}
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/// getFrameMoves - Returns a reference to a list of moves done in the current
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/// function's prologue. Used to construct frame maps for debug and exception
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/// handling comsumers.
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std::vector<MachineMove> &getFrameMoves() { return FrameMoves; }
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/// getCompactUnwindEncoding - Returns the compact unwind encoding for a
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/// function if the target supports the encoding. This encoding replaces a
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/// function's CIE and FDE.
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uint32_t getCompactUnwindEncoding() const { return CompactUnwindEncoding; }
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/// setCompactUnwindEncoding - Set the compact unwind encoding for a function
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/// if the target supports the encoding.
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void setCompactUnwindEncoding(uint32_t Enc) { CompactUnwindEncoding = Enc; }
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/// getAddrLabelSymbol - Return the symbol to be used for the specified basic
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/// block when its address is taken. This cannot be its normal LBB label
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/// because the block may be accessed outside its containing function.
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MCSymbol *getAddrLabelSymbol(const BasicBlock *BB);
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/// getAddrLabelSymbolToEmit - Return the symbol to be used for the specified
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/// basic block when its address is taken. If other blocks were RAUW'd to
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/// this one, we may have to emit them as well, return the whole set.
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std::vector<MCSymbol*> getAddrLabelSymbolToEmit(const BasicBlock *BB);
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/// takeDeletedSymbolsForFunction - If the specified function has had any
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/// references to address-taken blocks generated, but the block got deleted,
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/// return the symbol now so we can emit it. This prevents emitting a
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/// reference to a symbol that has no definition.
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void takeDeletedSymbolsForFunction(const Function *F,
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std::vector<MCSymbol*> &Result);
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//===- EH ---------------------------------------------------------------===//
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/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
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/// specified MachineBasicBlock.
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LandingPadInfo &getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad);
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/// addInvoke - Provide the begin and end labels of an invoke style call and
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/// associate it with a try landing pad block.
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void addInvoke(MachineBasicBlock *LandingPad,
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MCSymbol *BeginLabel, MCSymbol *EndLabel);
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/// addLandingPad - Add a new panding pad. Returns the label ID for the
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/// landing pad entry.
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MCSymbol *addLandingPad(MachineBasicBlock *LandingPad);
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/// addPersonality - Provide the personality function for the exception
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/// information.
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void addPersonality(MachineBasicBlock *LandingPad,
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const Function *Personality);
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/// getPersonalityIndex - Get index of the current personality function inside
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/// Personalitites array
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unsigned getPersonalityIndex() const;
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/// getPersonalities - Return array of personality functions ever seen.
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const std::vector<const Function *>& getPersonalities() const {
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return Personalities;
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}
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/// isUsedFunction - Return true if the functions in the llvm.used list. This
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/// does not return true for things in llvm.compiler.used unless they are also
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/// in llvm.used.
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bool isUsedFunction(const Function *F) const {
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return UsedFunctions.count(F);
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}
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/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
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///
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void addCatchTypeInfo(MachineBasicBlock *LandingPad,
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ArrayRef<const GlobalVariable *> TyInfo);
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/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
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///
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void addFilterTypeInfo(MachineBasicBlock *LandingPad,
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ArrayRef<const GlobalVariable *> TyInfo);
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/// addCleanup - Add a cleanup action for a landing pad.
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///
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void addCleanup(MachineBasicBlock *LandingPad);
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/// getTypeIDFor - Return the type id for the specified typeinfo. This is
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/// function wide.
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unsigned getTypeIDFor(const GlobalVariable *TI);
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/// getFilterIDFor - Return the id of the filter encoded by TyIds. This is
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/// function wide.
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int getFilterIDFor(std::vector<unsigned> &TyIds);
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/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
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/// pads.
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void TidyLandingPads(DenseMap<MCSymbol*, uintptr_t> *LPMap = 0);
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/// getLandingPads - Return a reference to the landing pad info for the
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/// current function.
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const std::vector<LandingPadInfo> &getLandingPads() const {
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return LandingPads;
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}
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/// setCallSiteLandingPad - Map the landing pad's EH symbol to the call
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/// site indexes.
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void setCallSiteLandingPad(MCSymbol *Sym, ArrayRef<unsigned> Sites);
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/// getCallSiteLandingPad - Get the call site indexes for a landing pad EH
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/// symbol.
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SmallVectorImpl<unsigned> &getCallSiteLandingPad(MCSymbol *Sym) {
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assert(hasCallSiteLandingPad(Sym) &&
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"missing call site number for landing pad!");
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return LPadToCallSiteMap[Sym];
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}
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/// hasCallSiteLandingPad - Return true if the landing pad Eh symbol has an
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/// associated call site.
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bool hasCallSiteLandingPad(MCSymbol *Sym) {
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return !LPadToCallSiteMap[Sym].empty();
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}
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/// setCallSiteBeginLabel - Map the begin label for a call site.
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void setCallSiteBeginLabel(MCSymbol *BeginLabel, unsigned Site) {
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CallSiteMap[BeginLabel] = Site;
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}
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/// getCallSiteBeginLabel - Get the call site number for a begin label.
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unsigned getCallSiteBeginLabel(MCSymbol *BeginLabel) {
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assert(hasCallSiteBeginLabel(BeginLabel) &&
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"Missing call site number for EH_LABEL!");
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return CallSiteMap[BeginLabel];
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}
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/// hasCallSiteBeginLabel - Return true if the begin label has a call site
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/// number associated with it.
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bool hasCallSiteBeginLabel(MCSymbol *BeginLabel) {
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return CallSiteMap[BeginLabel] != 0;
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}
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/// setCurrentCallSite - Set the call site currently being processed.
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void setCurrentCallSite(unsigned Site) { CurCallSite = Site; }
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/// getCurrentCallSite - Get the call site currently being processed, if any.
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/// return zero if none.
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unsigned getCurrentCallSite() { return CurCallSite; }
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/// getTypeInfos - Return a reference to the C++ typeinfo for the current
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/// function.
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const std::vector<const GlobalVariable *> &getTypeInfos() const {
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return TypeInfos;
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}
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/// getFilterIds - Return a reference to the typeids encoding filters used in
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/// the current function.
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const std::vector<unsigned> &getFilterIds() const {
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return FilterIds;
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}
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/// getPersonality - Return a personality function if available. The presence
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/// of one is required to emit exception handling info.
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const Function *getPersonality() const;
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/// setVariableDbgInfo - Collect information used to emit debugging
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/// information of a variable.
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void setVariableDbgInfo(MDNode *N, unsigned Slot, DebugLoc Loc) {
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VariableDbgInfo.push_back(std::make_pair(N, std::make_pair(Slot, Loc)));
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}
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VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfo; }
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}; // End class MachineModuleInfo
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} // End llvm namespace
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#endif
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