llvm-6502/include/llvm/CodeGen/MachineModuleInfo.h
2011-01-05 17:01:57 +00:00

367 lines
14 KiB
C++

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