#ifndef LLVM_CODEGEN_MACHINEMODULEINFO_H
#define LLVM_CODEGEN_MACHINEMODULEINFO_H
-#include "llvm/Support/Dwarf.h"
-#include "llvm/System/DataTypes.h"
-#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/UniqueVector.h"
+#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/CodeGen/MachineLocation.h"
-#include "llvm/GlobalValue.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Analysis/LibCallSemantics.h"
+#include "llvm/IR/DebugLoc.h"
+#include "llvm/IR/Metadata.h"
+#include "llvm/IR/ValueHandle.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MachineLocation.h"
#include "llvm/Pass.h"
-#include "llvm/Metadata.h"
-
-#define ATTACH_DEBUG_INFO_TO_AN_INSN 1
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Dwarf.h"
namespace llvm {
//===----------------------------------------------------------------------===//
// Forward declarations.
class Constant;
-class MDNode;
class GlobalVariable;
+class BlockAddress;
+class MDNode;
+class MMIAddrLabelMap;
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:
- virtual ~MachineModuleInfoImpl();
+struct WinEHFuncInfo;
+
+struct SEHHandler {
+ // Filter or finally function. Null indicates a catch-all.
+ const Function *FilterOrFinally;
+
+ // Address of block to recover at. Null for a finally handler.
+ const BlockAddress *RecoverBA;
};
-
-
//===----------------------------------------------------------------------===//
/// LandingPadInfo - This structure is used to retain landing pad info for
/// the current function.
///
struct LandingPadInfo {
- MachineBasicBlock *LandingPadBlock; // Landing pad block.
- SmallVector<unsigned, 1> BeginLabels; // Labels prior to invoke.
- SmallVector<unsigned, 1> EndLabels; // Labels after invoke.
- unsigned LandingPadLabel; // Label at beginning of landing pad.
- Function *Personality; // Personality function.
- std::vector<int> TypeIds; // List of type ids (filters negative)
+ MachineBasicBlock *LandingPadBlock; // Landing pad block.
+ SmallVector<MCSymbol *, 1> BeginLabels; // Labels prior to invoke.
+ SmallVector<MCSymbol *, 1> EndLabels; // Labels after invoke.
+ SmallVector<SEHHandler, 1> SEHHandlers; // SEH handlers active at this lpad.
+ MCSymbol *LandingPadLabel; // Label at beginning of landing pad.
+ const Function *Personality; // Personality function.
+ std::vector<int> TypeIds; // List of type ids (filters negative).
+ int WinEHState; // WinEH specific state number.
explicit LandingPadInfo(MachineBasicBlock *MBB)
- : LandingPadBlock(MBB)
- , LandingPadLabel(0)
- , Personality(NULL)
- {}
+ : LandingPadBlock(MBB), LandingPadLabel(nullptr), Personality(nullptr),
+ WinEHState(-1) {}
+};
+
+//===----------------------------------------------------------------------===//
+/// 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:
+
+ /// Return the entries from a DenseMap in a deterministic sorted orer.
+ /// Clears the map.
+ static SymbolListTy getSortedStubs(DenseMap<MCSymbol*, StubValueTy>&);
};
//===----------------------------------------------------------------------===//
/// MachineModuleInfo - This class contains meta information specific to a
-/// module. Queries can be made by different debugging and exception handling
+/// 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;
- // LabelIDList - One entry per assigned label. Normally the entry is equal to
- // the list index(+1). If the entry is zero then the label has been deleted.
- // Any other value indicates the label has been deleted by is mapped to
- // another label.
- std::vector<unsigned> LabelIDList;
-
- // 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.
+ /// List of moves done by a function's prolog. Used to construct frame maps
+ /// by debug and exception handling consumers.
+ std::vector<MCCFIInstruction> FrameInstructions;
+
+ /// LandingPads - List of LandingPadInfo describing the landing pad
+ /// information in the current function.
std::vector<LandingPadInfo> LandingPads;
-
- // TypeInfos - List of C++ TypeInfo used in the current function.
- //
- std::vector<GlobalVariable *> TypeInfos;
- // FilterIds - List of typeids encoding filters used in the current function.
- //
+ /// LPadToCallSiteMap - Map a landing pad's EH symbol to the call site
+ /// indexes.
+ DenseMap<MCSymbol*, SmallVector<unsigned, 4> > LPadToCallSiteMap;
+
+ /// CallSiteMap - Map of invoke call site index values to associated begin
+ /// EH_LABEL for the current function.
+ DenseMap<MCSymbol*, unsigned> CallSiteMap;
+
+ /// CurCallSite - 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 GlobalValue *> 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.
- //
+ /// 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<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;
+ /// Personalities - Vector of all personality functions ever seen. Used to
+ /// emit common EH frames.
+ std::vector<const Function *> Personalities;
- /// UsedDbgLabels - labels are used by debug info entries.
- SmallSet<unsigned, 8> UsedDbgLabels;
+ /// 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;
+ /// UsesVAFloatArgument - 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 UsesVAFloatArgument;
+
+ /// UsesMorestackAddr - True if the module calls the __morestack function
+ /// indirectly, as is required under the large code model on x86. This is used
+ /// to emit a definition of a symbol, __morestack_addr, containing the
+ /// address. See comments in lib/Target/X86/X86FrameLowering.cpp for more
+ /// details.
+ bool UsesMorestackAddr;
+
+ EHPersonality PersonalityTypeCache;
+
+ DenseMap<const Function *, std::unique_ptr<WinEHFuncInfo>> FuncInfoMap;
+
public:
static char ID; // Pass identification, replacement for typeid
- typedef std::pair<unsigned, TrackingVH<MDNode> > UnsignedAndMDNodePair;
- typedef SmallVector< std::pair<TrackingVH<MDNode>, UnsignedAndMDNodePair>, 4>
- VariableDbgInfoMapTy;
- VariableDbgInfoMapTy VariableDbgInfo;
-
- MachineModuleInfo();
- ~MachineModuleInfo();
-
- bool doInitialization();
- bool doFinalization();
+ struct VariableDbgInfo {
+ const DILocalVariable *Var;
+ const DIExpression *Expr;
+ unsigned Slot;
+ const DILocation *Loc;
+
+ VariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
+ unsigned Slot, const DILocation *Loc)
+ : Var(Var), Expr(Expr), Slot(Slot), Loc(Loc) {}
+ };
+ typedef SmallVector<VariableDbgInfo, 4> VariableDbgInfoMapTy;
+ VariableDbgInfoMapTy VariableDbgInfos;
+
+ MachineModuleInfo(); // DUMMY CONSTRUCTOR, DO NOT CALL.
+ // Real constructor.
+ MachineModuleInfo(const MCAsmInfo &MAI, const MCRegisterInfo &MRI,
+ const MCObjectFileInfo *MOFI);
+ ~MachineModuleInfo() override;
+
+ // Initialization and Finalization
+ bool doInitialization(Module &) override;
+ bool doFinalization(Module &) override;
- /// BeginFunction - Begin gathering function meta information.
- ///
- void BeginFunction(MachineFunction *) {}
-
/// 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; }
+
+ const Function *getWinEHParent(const Function *F) const;
+ WinEHFuncInfo &getWinEHFuncInfo(const Function *F);
+ bool hasWinEHFuncInfo(const Function *F) const {
+ return FuncInfoMap.count(getWinEHParent(F)) > 0;
+ }
+
/// 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)
+ if (ObjFileMMI == nullptr)
ObjFileMMI = new Ty(*this);
-
- assert((void*)dynamic_cast<Ty*>(ObjFileMMI) == (void*)ObjFileMMI &&
- "Invalid concrete type or multiple inheritence for getInfo");
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(Module &M);
-
+
/// hasDebugInfo - Returns true if valid debug info is present.
///
bool hasDebugInfo() const { return DbgInfoAvailable; }
- void setDebugInfoAvailability(bool avail) { DbgInfoAvailable = true; }
+ 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; }
-
- /// NextLabelID - Return the next unique label id.
- ///
- unsigned NextLabelID() {
- unsigned ID = (unsigned)LabelIDList.size() + 1;
- LabelIDList.push_back(ID);
- return ID;
- }
-
- /// InvalidateLabel - Inhibit use of the specified label # from
- /// MachineModuleInfo, for example because the code was deleted.
- void InvalidateLabel(unsigned LabelID) {
- // Remap to zero to indicate deletion.
- RemapLabel(LabelID, 0);
- }
- /// RemapLabel - Indicate that a label has been merged into another.
- ///
- void RemapLabel(unsigned OldLabelID, unsigned NewLabelID) {
- assert(0 < OldLabelID && OldLabelID <= LabelIDList.size() &&
- "Old label ID out of range.");
- assert(NewLabelID <= LabelIDList.size() &&
- "New label ID out of range.");
- LabelIDList[OldLabelID - 1] = NewLabelID;
+ bool usesVAFloatArgument() const {
+ return UsesVAFloatArgument;
}
-
- /// MappedLabel - Find out the label's final ID. Zero indicates deletion.
- /// ID != Mapped ID indicates that the label was folded into another label.
- unsigned MappedLabel(unsigned LabelID) const {
- assert(LabelID <= LabelIDList.size() && "Debug label ID out of range.");
- return LabelID ? LabelIDList[LabelID - 1] : 0;
+
+ void setUsesVAFloatArgument(bool b) {
+ UsesVAFloatArgument = b;
}
- /// isDbgLabelUsed - Return true if label with LabelID is used by
- /// DwarfWriter.
- bool isDbgLabelUsed(unsigned LabelID) {
- return UsedDbgLabels.count(LabelID);
+ bool usesMorestackAddr() const {
+ return UsesMorestackAddr;
}
-
- /// RecordUsedDbgLabel - Mark label with LabelID as used. This is used
- /// by DwarfWriter to inform DebugLabelFolder that certain labels are
- /// not to be deleted.
- void RecordUsedDbgLabel(unsigned LabelID) {
- UsedDbgLabels.insert(LabelID);
+
+ void setUsesMorestackAddr(bool b) {
+ UsesMorestackAddr = b;
}
- /// getFrameMoves - Returns a reference to a list of moves done in the current
+ /// \brief Returns a reference to a list of cfi instructions in the current
/// function's prologue. Used to construct frame maps for debug and exception
/// handling comsumers.
- std::vector<MachineMove> &getFrameMoves() { return FrameMoves; }
-
- //===-EH-----------------------------------------------------------------===//
+ const std::vector<MCCFIInstruction> &getFrameInstructions() const {
+ return FrameInstructions;
+ }
+
+ unsigned LLVM_ATTRIBUTE_UNUSED_RESULT
+ addFrameInst(const MCCFIInstruction &Inst) {
+ FrameInstructions.push_back(Inst);
+ return FrameInstructions.size() - 1;
+ }
+
+ /// 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) {
+ return getAddrLabelSymbolToEmit(BB).front();
+ }
+
+ /// 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.
+ ArrayRef<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.
/// 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, unsigned BeginLabel,
- unsigned EndLabel);
-
- /// addLandingPad - Add a new panding pad. Returns the label ID for the
+ void addInvoke(MachineBasicBlock *LandingPad,
+ MCSymbol *BeginLabel, MCSymbol *EndLabel);
+
+ /// addLandingPad - Add a new panding pad. Returns the label ID for the
/// landing pad entry.
- unsigned addLandingPad(MachineBasicBlock *LandingPad);
-
+ MCSymbol *addLandingPad(MachineBasicBlock *LandingPad);
+
/// addPersonality - Provide the personality function for the exception
/// information.
- void addPersonality(MachineBasicBlock *LandingPad, Function *Personality);
+ void addPersonality(MachineBasicBlock *LandingPad,
+ const Function *Personality);
+
+ void addWinEHState(MachineBasicBlock *LandingPad, int State);
/// 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<Function *>& getPersonalities() const {
+ 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<GlobalVariable *> &TyInfo);
+ ArrayRef<const GlobalValue *> TyInfo);
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
void addFilterTypeInfo(MachineBasicBlock *LandingPad,
- std::vector<GlobalVariable *> &TyInfo);
+ ArrayRef<const GlobalValue *> 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
+ void addSEHCatchHandler(MachineBasicBlock *LandingPad, const Function *Filter,
+ const BlockAddress *RecoverLabel);
+
+ void addSEHCleanupHandler(MachineBasicBlock *LandingPad,
+ const Function *Cleanup);
+
+ /// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
- unsigned getTypeIDFor(GlobalVariable *TI);
+ unsigned getTypeIDFor(const GlobalValue *TI);
/// getFilterIDFor - Return the id of the filter encoded by TyIds. This is
/// function wide.
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
- void TidyLandingPads();
-
+ void TidyLandingPads(DenseMap<MCSymbol*, uintptr_t> *LPMap = nullptr);
+
/// getLandingPads - Return a reference to the landing pad info for the
/// current function.
const std::vector<LandingPadInfo> &getLandingPads() const {
return LandingPads;
}
-
+
+ /// setCallSiteLandingPad - Map the landing pad's EH symbol to the call
+ /// site indexes.
+ void setCallSiteLandingPad(MCSymbol *Sym, ArrayRef<unsigned> Sites);
+
+ /// getCallSiteLandingPad - Get the call site indexes for a landing pad EH
+ /// symbol.
+ SmallVectorImpl<unsigned> &getCallSiteLandingPad(MCSymbol *Sym) {
+ assert(hasCallSiteLandingPad(Sym) &&
+ "missing call site number for landing pad!");
+ return LPadToCallSiteMap[Sym];
+ }
+
+ /// hasCallSiteLandingPad - Return true if the landing pad Eh symbol has an
+ /// associated call site.
+ bool hasCallSiteLandingPad(MCSymbol *Sym) {
+ return !LPadToCallSiteMap[Sym].empty();
+ }
+
+ /// 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(hasCallSiteBeginLabel(BeginLabel) &&
+ "Missing call site number for EH_LABEL!");
+ return CallSiteMap[BeginLabel];
+ }
+
+ /// hasCallSiteBeginLabel - Return true if the begin label has a call site
+ /// number associated with it.
+ bool hasCallSiteBeginLabel(MCSymbol *BeginLabel) {
+ return CallSiteMap[BeginLabel] != 0;
+ }
+
+ /// 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() { return CurCallSite; }
+
/// getTypeInfos - Return a reference to the C++ typeinfo for the current
/// function.
- const std::vector<GlobalVariable *> &getTypeInfos() const {
+ const std::vector<const GlobalValue *> &getTypeInfos() const {
return TypeInfos;
}
/// getPersonality - Return a personality function if available. The presence
/// of one is required to emit exception handling info.
- Function *getPersonality() const;
+ const Function *getPersonality() const;
+
+ /// Classify the personality function amongst known EH styles.
+ EHPersonality getPersonalityType();
- /// setVariableDbgInfo - Collect information used to emit debugging information
- /// of a variable.
- void setVariableDbgInfo(MDNode *N, unsigned Slot, MDNode *Scope) {
- VariableDbgInfo.push_back(std::make_pair(N, std::make_pair(Slot, Scope)));
+ /// setVariableDbgInfo - Collect information used to emit debugging
+ /// information of a variable.
+ void setVariableDbgInfo(const DILocalVariable *Var, const DIExpression *Expr,
+ unsigned Slot, const DILocation *Loc) {
+ VariableDbgInfos.emplace_back(Var, Expr, Slot, Loc);
}
- VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfo; }
+ VariableDbgInfoMapTy &getVariableDbgInfo() { return VariableDbgInfos; }
}; // End class MachineModuleInfo
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