X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FFunction.h;h=678651bbf1f8d75a3eb7292f82d429097a265d3d;hb=252ef7a61a9455c1e5d7b8a5a5f7ec8b3a75e200;hp=4a078d6845f20461ebb77f5f76cfa253f2b5612e;hpb=bde84d2fca4217043eb8c2ba447ae2797813ca54;p=oota-llvm.git diff --git a/include/llvm/Function.h b/include/llvm/Function.h index 4a078d6845f..678651bbf1f 100644 --- a/include/llvm/Function.h +++ b/include/llvm/Function.h @@ -19,39 +19,55 @@ #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 instructions... +// Traits for intrusive list of basic blocks... template<> struct ilist_traits : public SymbolTableListTraits { - // createSentinel is used to create a node that marks the end of the list... - static BasicBlock *createSentinel(); - static void destroySentinel(BasicBlock *BB) { delete BB; } - static iplist &getList(Function *F); + // createSentinel is used to get hold of the node that marks the end of the + // list... (same trick used here as in ilist_traits) + BasicBlock *createSentinel() const { + return static_cast(&Sentinel); + } + static void destroySentinel(BasicBlock*) {} + + BasicBlock *provideInitialHead() const { return createSentinel(); } + BasicBlock *ensureHead(BasicBlock*) const { return createSentinel(); } + static void noteHead(BasicBlock*, BasicBlock*) {} + static ValueSymbolTable *getSymTab(Function *ItemParent); - static int getListOffset(); +private: + mutable ilist_half_node Sentinel; }; template<> struct ilist_traits : public SymbolTableListTraits { - // createSentinel is used to create a node that marks the end of the list... - static Argument *createSentinel(); - static void destroySentinel(Argument *A) { delete A; } - static iplist &getList(Function *F); + Argument *createSentinel() const { + return static_cast(&Sentinel); + } + static void destroySentinel(Argument*) {} + + Argument *provideInitialHead() const { return createSentinel(); } + Argument *ensureHead(Argument*) const { return createSentinel(); } + static void noteHead(Argument*, Argument*) {} + static ValueSymbolTable *getSymTab(Function *ItemParent); - static int getListOffset(); +private: + mutable ilist_half_node Sentinel; }; -class Function : public GlobalValue, public Annotable, +class Function : public GlobalValue, public ilist_node { public: typedef iplist ArgumentListType; @@ -71,8 +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; @@ -83,7 +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()) @@ -98,30 +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 @@ -129,15 +146,18 @@ public: /// The particular intrinsic functions which correspond to this value are /// defined in llvm/Intrinsics.h. /// - unsigned getIntrinsicID(bool noAssert = false) 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. @@ -161,6 +181,13 @@ public: addAttribute(~0U, N); } + /// removeFnAttr - Remove function attributes from this function. + /// + void removeFnAttr(Attributes N) { + // Function Attributes are stored at ~0 index + removeAttribute(~0U, N); + } + /// hasGC/getGC/setGC/clearGC - The name of the garbage collection algorithm /// to use during code generation. bool hasGC() const; @@ -186,38 +213,55 @@ public: /// @brief Determine if the function does not access memory. bool doesNotAccessMemory() const { - return paramHasAttr(~0, Attribute::ReadNone); + return hasFnAttr(Attribute::ReadNone); } void setDoesNotAccessMemory(bool DoesNotAccessMemory = true) { - if (DoesNotAccessMemory) addAttribute(~0, Attribute::ReadNone); - else removeAttribute(~0, Attribute::ReadNone); + if (DoesNotAccessMemory) addFnAttr(Attribute::ReadNone); + else removeFnAttr(Attribute::ReadNone); } /// @brief Determine if the function does not access or only reads memory. bool onlyReadsMemory() const { - return doesNotAccessMemory() || paramHasAttr(~0, Attribute::ReadOnly); + return doesNotAccessMemory() || hasFnAttr(Attribute::ReadOnly); } void setOnlyReadsMemory(bool OnlyReadsMemory = true) { - if (OnlyReadsMemory) addAttribute(~0, Attribute::ReadOnly); - else removeAttribute(~0, Attribute::ReadOnly | Attribute::ReadNone); + if (OnlyReadsMemory) addFnAttr(Attribute::ReadOnly); + else removeFnAttr(Attribute::ReadOnly | Attribute::ReadNone); } /// @brief Determine if the function cannot return. bool doesNotReturn() const { - return paramHasAttr(~0, Attribute::NoReturn); + return hasFnAttr(Attribute::NoReturn); } void setDoesNotReturn(bool DoesNotReturn = true) { - if (DoesNotReturn) addAttribute(~0, Attribute::NoReturn); - else removeAttribute(~0, Attribute::NoReturn); + if (DoesNotReturn) addFnAttr(Attribute::NoReturn); + else removeFnAttr(Attribute::NoReturn); } /// @brief Determine if the function cannot unwind. bool doesNotThrow() const { - return paramHasAttr(~0, Attribute::NoUnwind); + return hasFnAttr(Attribute::NoUnwind); } void setDoesNotThrow(bool DoesNotThrow = true) { - if (DoesNotThrow) addAttribute(~0, Attribute::NoUnwind); - else removeAttribute(~0, Attribute::NoUnwind); + 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 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 @@ -226,6 +270,26 @@ public: return paramHasAttr(1, Attribute::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); + } + void setDoesNotAlias(unsigned n, bool DoesNotAlias = true) { + if (DoesNotAlias) addAttribute(n, Attribute::NoAlias); + else removeAttribute(n, Attribute::NoAlias); + } + + /// @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); + } + void setDoesNotCapture(unsigned n, bool DoesNotCapture = true) { + if (DoesNotCapture) addAttribute(n, Attribute::NoCapture); + else removeAttribute(n, Attribute::NoCapture); + } + /// copyAttributesFrom - copy all additional attributes (those not needed to /// create a Function) from the Function Src to this one. void copyAttributesFrom(const GlobalValue *Src); @@ -260,9 +324,15 @@ public: CheckLazyArguments(); return ArgumentList; } + static iplist Function::*getSublistAccess(Argument*) { + return &Function::ArgumentList; + } const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; } BasicBlockListType &getBasicBlockList() { return BasicBlocks; } + static iplist Function::*getSublistAccess(BasicBlock*) { + return &Function::BasicBlocks; + } const BasicBlock &getEntryBlock() const { return front(); } BasicBlock &getEntryBlock() { return front(); } @@ -348,14 +418,22 @@ public: /// including any contained basic blocks. /// void dropAllReferences(); - - static unsigned getBasicBlockListOffset() { - Function *Obj = 0; - return unsigned(reinterpret_cast(&Obj->BasicBlocks)); - } - static unsigned getArgumentListOffset() { - Function *Obj = 0; - return unsigned(reinterpret_cast(&Obj->ArgumentList)); + + /// 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; + + /// 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); } }; @@ -369,17 +447,6 @@ ilist_traits::getSymTab(Function *F) { return F ? &F->getValueSymbolTable() : 0; } -inline int -ilist_traits::getListOffset() { - return Function::getBasicBlockListOffset(); -} - -inline int -ilist_traits::getListOffset() { - return Function::getArgumentListOffset(); -} - - } // End llvm namespace #endif