X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FFunction.h;h=5601c471f2802b902057d2aa2cb8b7665b465f4d;hb=7d661468682c333739a6f6ab7dc337463573c354;hp=db728bff31e4adae40f2efb8ec163a67d58eb12a;hpb=0a205a459884ec745df1c529396dd921f029dafd;p=oota-llvm.git diff --git a/include/llvm/Function.h b/include/llvm/Function.h index db728bff31e..5601c471f28 100644 --- a/include/llvm/Function.h +++ b/include/llvm/Function.h @@ -19,10 +19,11 @@ #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 { @@ -46,7 +47,7 @@ template<> struct ilist_traits static ValueSymbolTable *getSymTab(Function *ItemParent); private: - mutable ilist_node Sentinel; + mutable ilist_half_node Sentinel; }; template<> struct ilist_traits @@ -63,10 +64,10 @@ template<> struct ilist_traits 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; @@ -86,8 +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; @@ -98,49 +102,43 @@ 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()) BuildLazyArguments(); } void BuildLazyArguments() const; - - Function(const Function&); // DO NOT IMPLEMENT - void operator=(const Function&); // DO NOT IMPLEMENT + + Function(const Function&) LLVM_DELETED_FUNCTION; + void operator=(const Function&) LLVM_DELETED_FUNCTION; /// Function ctor - If the (optional) Module argument is specified, the /// 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; + 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 @@ -148,15 +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_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. @@ -167,10 +168,10 @@ public: /// void setAttributes(const AttrListPtr &attrs) { AttributeList = attrs; } - /// hasFnAttr - Return true if this function has the given attribute. - bool hasFnAttr(Attributes N) const { - // Function Attributes are stored at ~0 index - return AttributeList.paramHasAttr(~0U, N); + /// getFnAttributes - Return the function attributes for querying. + /// + Attributes getFnAttributes() const { + return AttributeList.getFnAttributes(); } /// addFnAttr - Add function attributes to this function. @@ -194,9 +195,15 @@ public: void setGC(const char *Str); void clearGC(); - /// @brief Determine whether the function has the given attribute. - bool paramHasAttr(unsigned i, Attributes attr) const { - return AttributeList.paramHasAttr(i, attr); + + /// getRetAttributes - Return the return attributes for querying. + Attributes getRetAttributes() const { + return AttributeList.getRetAttributes(); + } + + /// getParamAttributes - Return the parameter attributes for querying. + Attributes getParamAttributes(unsigned Idx) const { + return AttributeList.getParamAttributes(Idx); } /// addAttribute - adds the attribute to the list of attributes. @@ -212,7 +219,7 @@ public: /// @brief Determine if the function does not access memory. bool doesNotAccessMemory() const { - return hasFnAttr(Attribute::ReadNone); + return getFnAttributes().hasAttribute(Attributes::ReadNone); } void setDoesNotAccessMemory(bool DoesNotAccessMemory = true) { if (DoesNotAccessMemory) addFnAttr(Attribute::ReadNone); @@ -221,7 +228,8 @@ public: /// @brief Determine if the function does not access or only reads memory. bool onlyReadsMemory() const { - return doesNotAccessMemory() || hasFnAttr(Attribute::ReadOnly); + return doesNotAccessMemory() || + getFnAttributes().hasAttribute(Attributes::ReadOnly); } void setOnlyReadsMemory(bool OnlyReadsMemory = true) { if (OnlyReadsMemory) addFnAttr(Attribute::ReadOnly); @@ -230,7 +238,7 @@ public: /// @brief Determine if the function cannot return. bool doesNotReturn() const { - return hasFnAttr(Attribute::NoReturn); + return getFnAttributes().hasAttribute(Attributes::NoReturn); } void setDoesNotReturn(bool DoesNotReturn = true) { if (DoesNotReturn) addFnAttr(Attribute::NoReturn); @@ -239,23 +247,40 @@ public: /// @brief Determine if the function cannot unwind. bool doesNotThrow() const { - return hasFnAttr(Attribute::NoUnwind); + return getFnAttributes().hasAttribute(Attributes::NoUnwind); } void setDoesNotThrow(bool DoesNotThrow = true) { if (DoesNotThrow) addFnAttr(Attribute::NoUnwind); 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 getFnAttributes().hasAttribute(Attributes::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 { - return paramHasAttr(1, Attribute::StructRet); + return getParamAttributes(1).hasAttribute(Attributes::StructRet); } /// @brief Determine if the parameter does not alias other parameters. /// @param n The parameter to check. 1 is the first parameter, 0 is the return bool doesNotAlias(unsigned n) const { - return paramHasAttr(n, Attribute::NoAlias); + return getParamAttributes(n).hasAttribute(Attributes::NoAlias); } void setDoesNotAlias(unsigned n, bool DoesNotAlias = true) { if (DoesNotAlias) addAttribute(n, Attribute::NoAlias); @@ -265,7 +290,7 @@ public: /// @brief Determine if the parameter can be captured. /// @param n The parameter to check. 1 is the first parameter, 0 is the return bool doesNotCapture(unsigned n) const { - return paramHasAttr(n, Attribute::NoCapture); + return getParamAttributes(n).hasAttribute(Attributes::NoCapture); } void setDoesNotCapture(unsigned n, bool DoesNotCapture = true) { if (DoesNotCapture) addAttribute(n, Attribute::NoCapture); @@ -402,8 +427,27 @@ public: void dropAllReferences(); /// hasAddressTaken - returns true if there are any uses of this function - /// other than direct calls or invokes to it. - bool hasAddressTaken() const; + /// other than direct calls or invokes to it, or blockaddress expressions. + /// Optionally passes back an 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 *