-//===-- llvm/Function.h - Class to represent a single VM function -*- C++ -*-=//
+//===-- llvm/Function.h - Class to represent a single function --*- C++ -*-===//
//
// This file contains the declaration of the Function class, which represents a
-// single function/procedure in the VM.
+// single function/procedure in LLVM.
//
-// Note that basic blocks in the method are value's, because they are referenced
-// by instructions like calls and can go into virtual function tables and stuff.
+// A function basically consists of a list of basic blocks, a list of arguments,
+// and a symbol table.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_FUNCTION_H
#define LLVM_FUNCTION_H
-#include "llvm/SymTabValue.h"
#include "llvm/GlobalValue.h"
-#include "llvm/ValueHolder.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/Argument.h"
class FunctionType;
-class Function : public GlobalValue, public SymTabValue {
+// Traits for intrusive list of instructions...
+template<> struct ilist_traits<BasicBlock>
+ : public SymbolTableListTraits<BasicBlock, Function, Function> {
+
+ // createNode is used to create a node that marks the end of the list...
+ static BasicBlock *createNode();
+
+ static iplist<BasicBlock> &getList(Function *F);
+};
+
+template<> struct ilist_traits<Argument>
+ : public SymbolTableListTraits<Argument, Function, Function> {
+
+ // createNode is used to create a node that marks the end of the list...
+ static Argument *createNode();
+ static iplist<Argument> &getList(Function *F);
+};
+
+class Function : public GlobalValue {
public:
- typedef ValueHolder<FunctionArgument, Function, Function> ArgumentListType;
- typedef ValueHolder<BasicBlock , Function, Function> BasicBlocksType;
+ typedef iplist<Argument> ArgumentListType;
+ typedef iplist<BasicBlock> BasicBlockListType;
// BasicBlock iterators...
- typedef BasicBlocksType::iterator iterator;
- typedef BasicBlocksType::const_iterator const_iterator;
+ typedef BasicBlockListType::iterator iterator;
+ typedef BasicBlockListType::const_iterator const_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
typedef std::reverse_iterator<iterator> reverse_iterator;
+ typedef ArgumentListType::iterator aiterator;
+ typedef ArgumentListType::const_iterator const_aiterator;
+ typedef std::reverse_iterator<const_aiterator> const_reverse_aiterator;
+ typedef std::reverse_iterator<aiterator> reverse_aiterator;
+
private:
- // Important things that make up a method!
- BasicBlocksType BasicBlocks; // The basic blocks
+ // Important things that make up a function!
+ BasicBlockListType BasicBlocks; // The basic blocks
ArgumentListType ArgumentList; // The formal arguments
+
+ SymbolTable *SymTab;
- friend class ValueHolder<Function, Module, Module>;
+ friend class SymbolTableListTraits<Function, Module, Module>;
+
void setParent(Module *parent);
+ Function *Prev, *Next;
+ void setNext(Function *N) { Next = N; }
+ void setPrev(Function *N) { Prev = N; }
public:
- Function(const FunctionType *Ty, bool isInternal, const std::string &N = "");
+ /// 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();
// Specialize setName to handle symbol table majik...
const Type *getReturnType() const; // Return the type of the ret val
const FunctionType *getFunctionType() const; // Return the FunctionType for me
- // Is the body of this method unknown? (the basic block list is empty if so)
- // this is true for external methods, defined as forward "declare"ations
- bool isExternal() const { return BasicBlocks.empty(); }
+ /// isExternal - Is the body of this function unknown? (the basic block list
+ /// is empty if so) this is true for external functions, defined as forward
+ /// "declare"ations
+ ///
+ virtual bool isExternal() const { return BasicBlocks.empty(); }
+
+ /// getIntrinsicID - This method returns the ID number of the specified
+ /// function, or LLVMIntrinsic::not_intrinsic if the function is not an
+ /// instrinsic, or if the pointer is null. This value is always defined to be
+ /// zero to allow easy checking for whether a function is intrinsic or not.
+ /// The particular intrinsic functions which correspond to this value are
+ /// defined in llvm/Intrinsics.h.
+ ///
+ unsigned getIntrinsicID() const;
+ bool isIntrinsic() const { return getIntrinsicID() != 0; }
+
+ /// deleteBody - This method deletes the body of the function, and converts
+ /// the linkage to external.
+ void deleteBody() {
+ dropAllReferences();
+ setLinkage(ExternalLinkage);
+ }
- // Get the underlying elements of the Function... both the argument list and
- // basic block list are empty for external methods.
+ // getNext/Prev - Return the next or previous function in the list. These
+ // methods should never be used directly, and are only used to implement the
+ // function list as part of the module.
//
- inline const ArgumentListType &getArgumentList() const{ return ArgumentList; }
- inline ArgumentListType &getArgumentList() { return ArgumentList; }
+ Function *getNext() { return Next; }
+ const Function *getNext() const { return Next; }
+ Function *getPrev() { return Prev; }
+ const Function *getPrev() const { return Prev; }
- inline const BasicBlocksType &getBasicBlocks() const { return BasicBlocks; }
- inline BasicBlocksType &getBasicBlocks() { return BasicBlocks; }
+ /// Get the underlying elements of the Function... the basic block list is
+ /// empty for external functions.
+ ///
+ const ArgumentListType &getArgumentList() const { return ArgumentList; }
+ ArgumentListType &getArgumentList() { return ArgumentList; }
+
+ const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
+ BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
+
+ const BasicBlock &getEntryBlock() const { return front(); }
+ BasicBlock &getEntryBlock() { return front(); }
+
+ //===--------------------------------------------------------------------===//
+ // Symbol Table Accessing functions...
+
+ /// getSymbolTable() - Return the symbol table...
+ ///
+ inline SymbolTable &getSymbolTable() { return *SymTab; }
+ inline const SymbolTable &getSymbolTable() const { return *SymTab; }
- inline const BasicBlock *getEntryNode() const { return front(); }
- inline BasicBlock *getEntryNode() { return front(); }
//===--------------------------------------------------------------------===//
// BasicBlock iterator forwarding functions
//
- inline iterator begin() { return BasicBlocks.begin(); }
- inline const_iterator begin() const { return BasicBlocks.begin(); }
- inline iterator end () { return BasicBlocks.end(); }
- inline const_iterator end () const { return BasicBlocks.end(); }
-
- inline reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
- inline const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
- inline reverse_iterator rend () { return BasicBlocks.rend(); }
- inline const_reverse_iterator rend () const { return BasicBlocks.rend(); }
+ iterator begin() { return BasicBlocks.begin(); }
+ const_iterator begin() const { return BasicBlocks.begin(); }
+ iterator end () { return BasicBlocks.end(); }
+ const_iterator end () const { return BasicBlocks.end(); }
+
+ reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
+ const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
+ reverse_iterator rend () { return BasicBlocks.rend(); }
+ const_reverse_iterator rend () const { return BasicBlocks.rend(); }
+
+ unsigned size() const { return BasicBlocks.size(); }
+ bool empty() const { return BasicBlocks.empty(); }
+ const BasicBlock &front() const { return BasicBlocks.front(); }
+ BasicBlock &front() { return BasicBlocks.front(); }
+ const BasicBlock &back() const { return BasicBlocks.back(); }
+ BasicBlock &back() { return BasicBlocks.back(); }
- inline unsigned size() const { return BasicBlocks.size(); }
- inline bool empty() const { return BasicBlocks.empty(); }
- inline const BasicBlock *front() const { return BasicBlocks.front(); }
- inline BasicBlock *front() { return BasicBlocks.front(); }
- inline const BasicBlock *back() const { return BasicBlocks.back(); }
- inline BasicBlock *back() { return BasicBlocks.back(); }
-
-
- // Methods for support type inquiry through isa, cast, and dyn_cast:
+ //===--------------------------------------------------------------------===//
+ // Argument iterator forwarding functions
+ //
+ aiterator abegin() { return ArgumentList.begin(); }
+ const_aiterator abegin() const { return ArgumentList.begin(); }
+ aiterator aend () { return ArgumentList.end(); }
+ const_aiterator aend () const { return ArgumentList.end(); }
+
+ reverse_aiterator arbegin() { return ArgumentList.rbegin(); }
+ const_reverse_aiterator arbegin() const { return ArgumentList.rbegin(); }
+ reverse_aiterator arend () { return ArgumentList.rend(); }
+ const_reverse_aiterator arend () const { return ArgumentList.rend(); }
+
+ unsigned asize() const { return ArgumentList.size(); }
+ bool aempty() const { return ArgumentList.empty(); }
+ const Argument &afront() const { return ArgumentList.front(); }
+ Argument &afront() { return ArgumentList.front(); }
+ const Argument &aback() const { return ArgumentList.back(); }
+ Argument &aback() { return ArgumentList.back(); }
+
+ virtual void print(std::ostream &OS) 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->getValueType() == Value::FunctionVal;
}
- // dropAllReferences() - This function causes all the subinstructions to "let
- // go" of all references that they are maintaining. This allows one to
- // 'delete' a whole class at a time, even though there may be circular
- // references... first all references are dropped, and all use counts go to
- // zero. Then everything is delete'd for real. Note that no operations are
- // valid on an object that has "dropped all references", except operator
- // delete.
- //
+ /// dropAllReferences() - This method causes all the subinstructions to "let
+ /// go" of all references that they are maintaining. This allows one to
+ /// 'delete' a whole module at a time, even though there may be circular
+ /// references... first all references are dropped, and all use counts go to
+ /// zero. Then everything is delete'd for real. Note that no operations are
+ /// valid on an object that has "dropped all references", except operator
+ /// delete.
+ ///
+ /// Since no other object in the module can have references into the body of a
+ /// function, dropping all references deletes the entire body of the function,
+ /// including any contained basic blocks.
+ ///
void dropAllReferences();
};
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