X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FFunction.h;h=b5916b7572b5366f6a66762fef2a36f319781a5a;hb=dcd33e40b814d18bd1a4d406ec67c082d73cc2cf;hp=ff0b066a5e505fa9dfd04da876e857043a49d5dd;hpb=b547a181005cc255fa57c61c1c0dbafca5375fb4;p=oota-llvm.git diff --git a/include/llvm/Function.h b/include/llvm/Function.h index ff0b066a5e5..b5916b7572b 100644 --- a/include/llvm/Function.h +++ b/include/llvm/Function.h @@ -19,14 +19,16 @@ #define LLVM_FUNCTION_H #include "llvm/GlobalValue.h" +#include "llvm/CallingConv.h" #include "llvm/BasicBlock.h" #include "llvm/Argument.h" -#include "llvm/Support/Annotation.h" #include "llvm/Attributes.h" +#include "llvm/Support/Compiler.h" namespace llvm { class FunctionType; +class LLVMContext; // Traits for intrusive list of basic blocks... template<> struct ilist_traits @@ -43,10 +45,9 @@ template<> struct ilist_traits BasicBlock *ensureHead(BasicBlock*) const { return createSentinel(); } static void noteHead(BasicBlock*, BasicBlock*) {} - static iplist &getList(Function *F); static ValueSymbolTable *getSymTab(Function *ItemParent); private: - mutable ilist_node Sentinel; + mutable ilist_half_node Sentinel; }; template<> struct ilist_traits @@ -61,13 +62,12 @@ template<> struct ilist_traits Argument *ensureHead(Argument*) const { return createSentinel(); } static void noteHead(Argument*, Argument*) {} - static iplist &getList(Function *F); static ValueSymbolTable *getSymTab(Function *ItemParent); private: - mutable ilist_node Sentinel; + mutable ilist_half_node Sentinel; }; -class Function : public GlobalValue, public Annotable, +class Function : public GlobalValue, public ilist_node { public: typedef iplist ArgumentListType; @@ -87,8 +87,11 @@ private: ValueSymbolTable *SymTab; ///< Symbol table of args/instructions AttrListPtr AttributeList; ///< Parameter attributes + // HasLazyArguments is stored in Value::SubclassData. + /*bool HasLazyArguments;*/ + // The Calling Convention is stored in Value::SubclassData. - /*unsigned CallingConvention;*/ + /*CallingConv::ID CallingConvention;*/ friend class SymbolTableListTraits; @@ -99,7 +102,7 @@ private: /// needs it. The hasLazyArguments predicate returns true if the arg list /// hasn't been set up yet. bool hasLazyArguments() const { - return SubclassData & 1; + return getSubclassDataFromValue() & 1; } void CheckLazyArguments() const { if (hasLazyArguments()) @@ -114,30 +117,28 @@ private: /// function is automatically inserted into the end of the function list for /// the module. /// - Function(const FunctionType *Ty, LinkageTypes Linkage, - const std::string &N = "", Module *M = 0); + Function(FunctionType *Ty, LinkageTypes Linkage, + const Twine &N = "", Module *M = 0); public: - static Function *Create(const FunctionType *Ty, LinkageTypes Linkage, - const std::string &N = "", Module *M = 0) { + static Function *Create(FunctionType *Ty, LinkageTypes Linkage, + const Twine &N = "", Module *M = 0) { return new(0) Function(Ty, Linkage, N, M); } ~Function(); - const Type *getReturnType() const; // Return the type of the ret val - const FunctionType *getFunctionType() const; // Return the FunctionType for me + Type *getReturnType() const; // Return the type of the ret val + FunctionType *getFunctionType() const; // Return the FunctionType for me + + /// getContext - Return a pointer to the LLVMContext associated with this + /// function, or NULL if this function is not bound to a context yet. + LLVMContext &getContext() const; /// isVarArg - Return true if this function takes a variable number of /// arguments. bool isVarArg() const; - /// isDeclaration - Is the body of this function unknown? (The basic block - /// list is empty if so.) This is true for function declarations, but not - /// true for function definitions. - /// - virtual bool isDeclaration() const { return BasicBlocks.empty(); } - /// getIntrinsicID - This method returns the ID number of the specified /// function, or Intrinsic::not_intrinsic if the function is not an /// instrinsic, or if the pointer is null. This value is always defined to be @@ -145,15 +146,18 @@ public: /// The particular intrinsic functions which correspond to this value are /// defined in llvm/Intrinsics.h. /// - unsigned getIntrinsicID() const; + unsigned getIntrinsicID() const LLVM_ATTRIBUTE_READONLY; bool isIntrinsic() const { return getIntrinsicID() != 0; } - /// getCallingConv()/setCallingConv(uint) - These method get and set the + /// getCallingConv()/setCallingConv(CC) - These method get and set the /// calling convention of this function. The enum values for the known /// calling conventions are defined in CallingConv.h. - unsigned getCallingConv() const { return SubclassData >> 1; } - void setCallingConv(unsigned CC) { - SubclassData = (SubclassData & 1) | (CC << 1); + CallingConv::ID getCallingConv() const { + return static_cast(getSubclassDataFromValue() >> 1); + } + void setCallingConv(CallingConv::ID CC) { + setValueSubclassData((getSubclassDataFromValue() & 1) | + (static_cast(CC) << 1)); } /// getAttributes - Return the attribute list for this Function. @@ -243,6 +247,23 @@ public: else removeFnAttr(Attribute::NoUnwind); } + /// @brief True if the ABI mandates (or the user requested) that this + /// function be in a unwind table. + bool hasUWTable() const { + return hasFnAttr(Attribute::UWTable); + } + void setHasUWTable(bool HasUWTable = true) { + if (HasUWTable) + addFnAttr(Attribute::UWTable); + else + removeFnAttr(Attribute::UWTable); + } + + /// @brief True if this function needs an unwind table. + bool needsUnwindTableEntry() const { + return hasUWTable() || !doesNotThrow(); + } + /// @brief Determine if the function returns a structure through first /// pointer argument. bool hasStructRetAttr() const { @@ -397,6 +418,29 @@ public: /// including any contained basic blocks. /// void dropAllReferences(); + + /// hasAddressTaken - returns true if there are any uses of this function + /// other than direct calls or invokes to it. Optionally passes back the + /// offending user for diagnostic purposes. + /// + bool hasAddressTaken(const User** = 0) const; + + /// isDefTriviallyDead - Return true if it is trivially safe to remove + /// this function definition from the module (because it isn't externally + /// visible, does not have its address taken, and has no callers). To make + /// this more accurate, call removeDeadConstantUsers first. + bool isDefTriviallyDead() const; + + /// callsFunctionThatReturnsTwice - Return true if the function has a call to + /// setjmp or other function that gcc recognizes as "returning twice". + bool callsFunctionThatReturnsTwice() const; + +private: + // Shadow Value::setValueSubclassData with a private forwarding method so that + // subclasses cannot accidentally use it. + void setValueSubclassData(unsigned short D) { + Value::setValueSubclassData(D); + } }; inline ValueSymbolTable *