#ifndef LLVM_FUNCTION_H
#define LLVM_FUNCTION_H
-#include "llvm/GlobalValue.h"
-#include "llvm/BasicBlock.h"
#include "llvm/Argument.h"
-#include "llvm/Support/Annotation.h"
#include "llvm/Attributes.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/CallingConv.h"
+#include "llvm/GlobalValue.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<BasicBlock>
: public SymbolTableListTraits<BasicBlock, Function> {
- // 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<BasicBlock> &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<Instruction>)
+ BasicBlock *createSentinel() const {
+ return static_cast<BasicBlock*>(&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<BasicBlock> Sentinel;
};
template<> struct ilist_traits<Argument>
: public SymbolTableListTraits<Argument, Function> {
- // 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<Argument> &getList(Function *F);
+ Argument *createSentinel() const {
+ return static_cast<Argument*>(&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<Argument> Sentinel;
};
-class Function : public GlobalValue, public Annotable,
+class Function : public GlobalValue,
public ilist_node<Function> {
public:
typedef iplist<Argument> ArgumentListType;
BasicBlockListType BasicBlocks; ///< The basic blocks
mutable ArgumentListType ArgumentList; ///< The formal arguments
ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
- AttrListPtr AttributeList; ///< Parameter attributes
+ 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<Function, Module>;
/// 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;
/// 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
/// 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_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<CallingConv::ID>(getSubclassDataFromValue() >> 1);
+ }
+ void setCallingConv(CallingConv::ID CC) {
+ setValueSubclassData((getSubclassDataFromValue() & 1) |
+ (static_cast<unsigned>(CC) << 1));
}
- /// getAttributes - Return the parameter attributes for this Function.
+ /// getAttributes - Return the attribute list for this Function.
///
const AttrListPtr &getAttributes() const { return AttributeList; }
- /// setAttributes - Set the parameter attributes for this Function.
+ /// setAttributes - Set the attribute list for this Function.
///
void setAttributes(const AttrListPtr &attrs) { AttributeList = attrs; }
+ /// getFnAttributes - Return the function attributes for querying.
+ ///
+ Attributes getFnAttributes() const {
+ return AttributeList.getFnAttributes();
+ }
- /// hasNote - Return true if this function has given note.
- bool hasNote(Attributes N) const {
- // Notes are stored at ~0 index in parameter attribute list
- return (paramHasAttr(~0, N));
+ /// addFnAttr - Add function attributes to this function.
+ ///
+ void addFnAttr(Attributes::AttrVal N) {
+ // Function Attributes are stored at ~0 index
+ addAttribute(AttrListPtr::FunctionIndex, Attributes::get(getContext(), N));
}
- /// setNotes - Set notes for this function
+ /// removeFnAttr - Remove function attributes from this function.
///
- void setNotes(const Attributes N) {
- // Notes are stored at ~0 index in parameter attribute list
- addAttribute(~0, N);
+ 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
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.
/// @brief Determine if the function does not access memory.
bool doesNotAccessMemory() const {
- return paramHasAttr(~0, Attribute::ReadNone);
+ return getFnAttributes().hasAttribute(Attributes::ReadNone);
}
- void setDoesNotAccessMemory(bool DoesNotAccessMemory = true) {
- if (DoesNotAccessMemory) addAttribute(~0, Attribute::ReadNone);
- else removeAttribute(~0, Attribute::ReadNone);
+ void setDoesNotAccessMemory() {
+ addFnAttr(Attributes::ReadNone);
}
/// @brief Determine if the function does not access or only reads memory.
bool onlyReadsMemory() const {
- return doesNotAccessMemory() || paramHasAttr(~0, Attribute::ReadOnly);
+ return doesNotAccessMemory() ||
+ getFnAttributes().hasAttribute(Attributes::ReadOnly);
}
- void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
- if (OnlyReadsMemory) addAttribute(~0, Attribute::ReadOnly);
- else removeAttribute(~0, Attribute::ReadOnly | Attribute::ReadNone);
+ void setOnlyReadsMemory() {
+ addFnAttr(Attributes::ReadOnly);
}
/// @brief Determine if the function cannot return.
bool doesNotReturn() const {
- return paramHasAttr(~0, Attribute::NoReturn);
+ return getFnAttributes().hasAttribute(Attributes::NoReturn);
}
- void setDoesNotReturn(bool DoesNotReturn = true) {
- if (DoesNotReturn) addAttribute(~0, Attribute::NoReturn);
- else removeAttribute(~0, Attribute::NoReturn);
+ void setDoesNotReturn() {
+ addFnAttr(Attributes::NoReturn);
}
/// @brief Determine if the function cannot unwind.
bool doesNotThrow() const {
- return paramHasAttr(~0, Attribute::NoUnwind);
+ return getFnAttributes().hasAttribute(Attributes::NoUnwind);
+ }
+ void setDoesNotThrow() {
+ addFnAttr(Attributes::NoUnwind);
}
- void setDoesNotThrow(bool DoesNotThrow = true) {
- if (DoesNotThrow) addAttribute(~0, Attribute::NoUnwind);
- else removeAttribute(~0, 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() {
+ addFnAttr(Attributes::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 getParamAttributes(n).hasAttribute(Attributes::NoAlias);
+ }
+ void setDoesNotAlias(unsigned n) {
+ addAttribute(n, Attributes::get(getContext(), Attributes::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 getParamAttributes(n).hasAttribute(Attributes::NoCapture);
+ }
+ void setDoesNotCapture(unsigned n) {
+ addAttribute(n, Attributes::get(getContext(), Attributes::NoCapture));
}
/// copyAttributesFrom - copy all additional attributes (those not needed to
CheckLazyArguments();
return ArgumentList;
}
+ static iplist<Argument> Function::*getSublistAccess(Argument*) {
+ return &Function::ArgumentList;
+ }
const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
+ static iplist<BasicBlock> Function::*getSublistAccess(BasicBlock*) {
+ return &Function::BasicBlocks;
+ }
const BasicBlock &getEntryBlock() const { return front(); }
BasicBlock &getEntryBlock() { return front(); }
void viewCFGOnly() const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const Function *) { return true; }
static inline bool classof(const Value *V) {
return V->getValueID() == Value::FunctionVal;
}
/// including any contained basic blocks.
///
void dropAllReferences();
-
- static unsigned getBasicBlockListOffset() {
- Function *Obj = 0;
- return unsigned(reinterpret_cast<uintptr_t>(&Obj->BasicBlocks));
- }
- static unsigned getArgumentListOffset() {
- Function *Obj = 0;
- return unsigned(reinterpret_cast<uintptr_t>(&Obj->ArgumentList));
+
+ /// hasAddressTaken - returns true if there are any uses of this function
+ /// 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);
}
};
return F ? &F->getValueSymbolTable() : 0;
}
-inline int
-ilist_traits<BasicBlock>::getListOffset() {
- return Function::getBasicBlockListOffset();
-}
-
-inline int
-ilist_traits<Argument>::getListOffset() {
- return Function::getArgumentListOffset();
-}
-
-
} // End llvm namespace
#endif
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