2002-09-06 20:47:31 +00:00
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//===-- llvm/Function.h - Class to represent a single function --*- C++ -*-===//
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2005-04-21 20:19:05 +00:00
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//
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2003-10-20 20:19:47 +00:00
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// The LLVM Compiler Infrastructure
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//
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2007-12-29 19:59:42 +00:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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2005-04-21 20:19:05 +00:00
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//
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2003-10-20 20:19:47 +00:00
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//===----------------------------------------------------------------------===//
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2001-06-06 20:29:01 +00:00
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//
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2005-04-21 20:19:05 +00:00
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// This file contains the declaration of the Function class, which represents a
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2002-09-06 20:47:31 +00:00
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// single function/procedure in LLVM.
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2001-06-06 20:29:01 +00:00
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//
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2002-09-06 20:47:31 +00:00
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// A function basically consists of a list of basic blocks, a list of arguments,
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// and a symbol table.
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2001-06-06 20:29:01 +00:00
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//
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//===----------------------------------------------------------------------===//
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2002-03-23 22:47:28 +00:00
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#ifndef LLVM_FUNCTION_H
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#define LLVM_FUNCTION_H
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2001-06-06 20:29:01 +00:00
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2001-10-03 14:53:21 +00:00
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#include "llvm/GlobalValue.h"
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2002-06-25 16:12:52 +00:00
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#include "llvm/BasicBlock.h"
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#include "llvm/Argument.h"
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2004-09-01 22:55:40 +00:00
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#include "llvm/Support/Annotation.h"
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2008-02-19 21:38:47 +00:00
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#include "llvm/ParameterAttributes.h"
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2001-06-06 20:29:01 +00:00
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2003-11-11 22:41:34 +00:00
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namespace llvm {
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2002-03-29 03:30:59 +00:00
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class FunctionType;
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2001-06-06 20:29:01 +00:00
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2002-06-25 16:12:52 +00:00
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// Traits for intrusive list of instructions...
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template<> struct ilist_traits<BasicBlock>
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2007-04-17 03:26:42 +00:00
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: public SymbolTableListTraits<BasicBlock, Function> {
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2002-06-25 16:12:52 +00:00
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2005-01-30 00:09:23 +00:00
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// createSentinel is used to create a node that marks the end of the list...
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static BasicBlock *createSentinel();
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static void destroySentinel(BasicBlock *BB) { delete BB; }
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2002-06-25 16:12:52 +00:00
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static iplist<BasicBlock> &getList(Function *F);
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2007-04-17 03:26:42 +00:00
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static ValueSymbolTable *getSymTab(Function *ItemParent);
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2007-04-17 04:04:14 +00:00
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static int getListOffset();
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2002-06-25 16:12:52 +00:00
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};
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template<> struct ilist_traits<Argument>
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2007-04-17 03:26:42 +00:00
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: public SymbolTableListTraits<Argument, Function> {
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2002-06-25 16:12:52 +00:00
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2005-01-30 00:09:23 +00:00
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// createSentinel is used to create a node that marks the end of the list...
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static Argument *createSentinel();
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static void destroySentinel(Argument *A) { delete A; }
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2002-06-25 16:12:52 +00:00
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static iplist<Argument> &getList(Function *F);
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2007-04-17 03:26:42 +00:00
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static ValueSymbolTable *getSymTab(Function *ItemParent);
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2007-04-17 04:04:14 +00:00
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static int getListOffset();
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2002-06-25 16:12:52 +00:00
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};
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2004-02-26 08:08:38 +00:00
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class Function : public GlobalValue, public Annotable {
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2001-06-06 20:29:01 +00:00
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public:
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2002-06-25 16:12:52 +00:00
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typedef iplist<Argument> ArgumentListType;
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typedef iplist<BasicBlock> BasicBlockListType;
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2001-06-27 23:26:41 +00:00
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// BasicBlock iterators...
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2002-06-25 16:12:52 +00:00
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typedef BasicBlockListType::iterator iterator;
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typedef BasicBlockListType::const_iterator const_iterator;
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2001-06-27 23:26:41 +00:00
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2005-03-14 23:49:40 +00:00
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typedef ArgumentListType::iterator arg_iterator;
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typedef ArgumentListType::const_iterator const_arg_iterator;
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2002-06-25 16:12:52 +00:00
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2001-06-06 20:29:01 +00:00
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private:
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2002-04-28 04:44:40 +00:00
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// Important things that make up a function!
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2007-08-18 06:14:52 +00:00
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BasicBlockListType BasicBlocks; ///< The basic blocks
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mutable ArgumentListType ArgumentList; ///< The formal arguments
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ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
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2008-03-12 17:45:29 +00:00
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PAListPtr ParamAttrs; ///< Parameter attributes
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2007-04-17 04:31:29 +00:00
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// The Calling Convention is stored in Value::SubclassData.
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/*unsigned CallingConvention;*/
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2005-04-21 20:19:05 +00:00
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2007-04-17 03:26:42 +00:00
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friend class SymbolTableListTraits<Function, Module>;
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2002-06-25 16:12:52 +00:00
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2001-06-06 20:29:01 +00:00
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void setParent(Module *parent);
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2002-06-25 16:12:52 +00:00
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Function *Prev, *Next;
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void setNext(Function *N) { Next = N; }
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void setPrev(Function *N) { Prev = N; }
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2001-06-06 20:29:01 +00:00
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2007-04-28 13:45:00 +00:00
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// getNext/Prev - Return the next or previous function in the list. These
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// methods should never be used directly, and are only used to implement the
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// function list as part of the module.
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//
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Function *getNext() { return Next; }
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const Function *getNext() const { return Next; }
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Function *getPrev() { return Prev; }
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const Function *getPrev() const { return Prev; }
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2007-08-18 06:14:52 +00:00
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/// hasLazyArguments/CheckLazyArguments - The argument list of a function is
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/// built on demand, so that the list isn't allocated until the first client
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/// needs it. The hasLazyArguments predicate returns true if the arg list
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/// hasn't been set up yet.
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bool hasLazyArguments() const {
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return SubclassData & 1;
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}
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void CheckLazyArguments() const {
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if (hasLazyArguments())
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BuildLazyArguments();
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}
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void BuildLazyArguments() const;
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2008-01-03 00:09:47 +00:00
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Function(const Function&); // DO NOT IMPLEMENT
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void operator=(const Function&); // DO NOT IMPLEMENT
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2008-04-06 20:25:17 +00:00
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2002-09-06 20:47:31 +00:00
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/// Function ctor - If the (optional) Module argument is specified, the
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/// function is automatically inserted into the end of the function list for
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/// the module.
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///
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2003-04-16 20:28:45 +00:00
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Function(const FunctionType *Ty, LinkageTypes Linkage,
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const std::string &N = "", Module *M = 0);
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2008-04-06 20:25:17 +00:00
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public:
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static Function *Create(const FunctionType *Ty, LinkageTypes Linkage,
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const std::string &N = "", Module *M = 0) {
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return new(0) Function(Ty, Linkage, N, M);
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}
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2007-12-10 02:14:30 +00:00
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~Function();
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2001-06-06 20:29:01 +00:00
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2002-03-29 03:30:59 +00:00
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const Type *getReturnType() const; // Return the type of the ret val
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const FunctionType *getFunctionType() const; // Return the FunctionType for me
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2001-06-06 20:29:01 +00:00
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2005-01-07 07:40:32 +00:00
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/// isVarArg - Return true if this function takes a variable number of
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/// arguments.
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bool isVarArg() const;
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2007-01-30 20:08:39 +00:00
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/// isDeclaration - Is the body of this function unknown? (The basic block
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/// list is empty if so.) This is true for function declarations, but not
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/// true for function definitions.
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2002-08-25 22:54:55 +00:00
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///
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2007-01-30 20:08:39 +00:00
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virtual bool isDeclaration() const { return BasicBlocks.empty(); }
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2001-06-06 20:29:01 +00:00
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2003-05-08 03:34:12 +00:00
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/// getIntrinsicID - This method returns the ID number of the specified
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2003-11-11 22:41:34 +00:00
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/// function, or Intrinsic::not_intrinsic if the function is not an
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2003-05-08 03:34:12 +00:00
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/// instrinsic, or if the pointer is null. This value is always defined to be
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/// zero to allow easy checking for whether a function is intrinsic or not.
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/// The particular intrinsic functions which correspond to this value are
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/// defined in llvm/Intrinsics.h.
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///
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2007-04-16 06:54:34 +00:00
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unsigned getIntrinsicID(bool noAssert = false) const;
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2003-05-08 03:34:12 +00:00
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bool isIntrinsic() const { return getIntrinsicID() != 0; }
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2005-05-06 20:26:26 +00:00
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/// getCallingConv()/setCallingConv(uint) - These method get and set the
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/// calling convention of this function. The enum values for the known
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/// calling conventions are defined in CallingConv.h.
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2007-08-18 06:14:52 +00:00
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unsigned getCallingConv() const { return SubclassData >> 1; }
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void setCallingConv(unsigned CC) {
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2007-08-20 21:31:08 +00:00
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SubclassData = (SubclassData & 1) | (CC << 1);
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2007-08-18 06:14:52 +00:00
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}
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2008-03-13 04:33:03 +00:00
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/// getParamAttrs - Return the parameter attributes for this Function.
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///
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2008-03-12 17:45:29 +00:00
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const PAListPtr &getParamAttrs() const { return ParamAttrs; }
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/// setParamAttrs - Set the parameter attributes for this Function.
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2008-03-13 04:33:03 +00:00
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///
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2008-03-12 17:45:29 +00:00
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void setParamAttrs(const PAListPtr &attrs) { ParamAttrs = attrs; }
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2007-11-27 13:23:08 +00:00
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2007-12-10 03:18:06 +00:00
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/// hasCollector/getCollector/setCollector/clearCollector - The name of the
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/// garbage collection algorithm to use during code generation.
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bool hasCollector() const;
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const char *getCollector() const;
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void setCollector(const char *Str);
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void clearCollector();
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2007-11-28 17:07:01 +00:00
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/// @brief Determine whether the function has the given attribute.
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2008-03-13 05:00:21 +00:00
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bool paramHasAttr(unsigned i, ParameterAttributes attr) const {
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return ParamAttrs.paramHasAttr(i, attr);
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}
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2008-05-16 20:39:43 +00:00
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/// addParamAttr - adds the attribute to the list of attributes.
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void addParamAttr(unsigned i, ParameterAttributes attr);
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2008-01-02 23:42:30 +00:00
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2008-07-08 09:41:30 +00:00
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/// removeParamAttr - removes the attribute from the list of attributes.
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void removeParamAttr(unsigned i, ParameterAttributes attr);
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2008-02-22 17:49:45 +00:00
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/// @brief Extract the alignment for a call or parameter (0=unknown).
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2008-03-13 05:00:21 +00:00
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unsigned getParamAlignment(unsigned i) const {
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return ParamAttrs.getParamAlignment(i);
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}
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2008-02-22 17:49:45 +00:00
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2007-12-03 20:06:50 +00:00
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/// @brief Determine if the function does not access memory.
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2008-03-13 05:00:21 +00:00
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bool doesNotAccessMemory() const {
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return paramHasAttr(0, ParamAttr::ReadNone);
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}
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2008-07-10 22:57:49 +00:00
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void setDoesNotAccessMemory(bool DoesNotAccessMemory = true) {
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if (DoesNotAccessMemory) addParamAttr(0, ParamAttr::ReadNone);
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2008-07-08 09:41:30 +00:00
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else removeParamAttr(0, ParamAttr::ReadNone);
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}
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2007-12-03 20:06:50 +00:00
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/// @brief Determine if the function does not access or only reads memory.
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2008-03-13 05:00:21 +00:00
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bool onlyReadsMemory() const {
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return doesNotAccessMemory() || paramHasAttr(0, ParamAttr::ReadOnly);
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}
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2008-07-10 22:57:49 +00:00
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void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
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if (OnlyReadsMemory) addParamAttr(0, ParamAttr::ReadOnly);
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2008-07-08 09:41:30 +00:00
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else removeParamAttr(0, ParamAttr::ReadOnly | ParamAttr::ReadNone);
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}
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/// @brief Determine if the function cannot return.
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bool doesNotReturn() const {
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return paramHasAttr(0, ParamAttr::NoReturn);
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}
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2008-07-10 22:57:49 +00:00
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void setDoesNotReturn(bool DoesNotReturn = true) {
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if (DoesNotReturn) addParamAttr(0, ParamAttr::NoReturn);
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2008-07-08 09:41:30 +00:00
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else removeParamAttr(0, ParamAttr::NoReturn);
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}
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/// @brief Determine if the function cannot unwind.
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bool doesNotThrow() const {
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return paramHasAttr(0, ParamAttr::NoUnwind);
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}
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2008-07-10 22:57:49 +00:00
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void setDoesNotThrow(bool DoesNotThrow = true) {
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if (DoesNotThrow) addParamAttr(0, ParamAttr::NoUnwind);
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2008-07-08 09:41:30 +00:00
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else removeParamAttr(0, ParamAttr::NoUnwind);
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}
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2007-12-03 20:06:50 +00:00
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2008-03-03 21:46:28 +00:00
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/// @brief Determine if the function returns a structure through first
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/// pointer argument.
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2008-03-13 05:00:21 +00:00
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bool hasStructRetAttr() const {
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return paramHasAttr(1, ParamAttr::StructRet);
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}
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2007-04-09 15:01:12 +00:00
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2008-05-26 19:58:59 +00:00
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/// copyAttributesFrom - copy all additional attributes (those not needed to
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/// create a Function) from the Function Src to this one.
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void copyAttributesFrom(const GlobalValue *Src);
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2003-09-17 04:58:43 +00:00
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/// deleteBody - This method deletes the body of the function, and converts
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/// the linkage to external.
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2004-03-01 18:31:19 +00:00
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///
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2003-09-17 04:58:43 +00:00
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void deleteBody() {
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dropAllReferences();
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setLinkage(ExternalLinkage);
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}
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2004-10-11 22:21:13 +00:00
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/// removeFromParent - This method unlinks 'this' from the containing module,
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/// but does not delete it.
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///
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2007-04-29 18:02:48 +00:00
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void removeFromParent();
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2004-10-11 22:21:13 +00:00
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/// eraseFromParent - This method unlinks 'this' from the containing module
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/// and deletes it.
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///
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2007-04-29 18:02:48 +00:00
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void eraseFromParent();
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2004-10-11 22:21:13 +00:00
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2003-05-09 22:16:18 +00:00
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/// Get the underlying elements of the Function... the basic block list is
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/// empty for external functions.
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2002-08-25 22:54:55 +00:00
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///
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2007-08-18 06:14:52 +00:00
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const ArgumentListType &getArgumentList() const {
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CheckLazyArguments();
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return ArgumentList;
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}
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ArgumentListType &getArgumentList() {
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CheckLazyArguments();
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return ArgumentList;
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}
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2001-06-27 23:26:41 +00:00
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2002-06-25 16:12:52 +00:00
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const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
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BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
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2001-06-06 20:29:01 +00:00
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2003-09-20 14:36:49 +00:00
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const BasicBlock &getEntryBlock() const { return front(); }
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BasicBlock &getEntryBlock() { return front(); }
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2002-04-28 04:44:40 +00:00
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//===--------------------------------------------------------------------===//
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// Symbol Table Accessing functions...
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2002-11-20 18:07:48 +00:00
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/// getSymbolTable() - Return the symbol table...
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2002-08-25 22:54:55 +00:00
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///
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2007-02-05 20:47:22 +00:00
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inline ValueSymbolTable &getValueSymbolTable() { return *SymTab; }
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inline const ValueSymbolTable &getValueSymbolTable() const { return *SymTab; }
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2002-04-28 04:44:40 +00:00
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2005-04-21 20:19:05 +00:00
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2001-06-27 23:26:41 +00:00
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//===--------------------------------------------------------------------===//
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// BasicBlock iterator forwarding functions
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//
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2002-06-25 16:12:52 +00:00
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iterator begin() { return BasicBlocks.begin(); }
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const_iterator begin() const { return BasicBlocks.begin(); }
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iterator end () { return BasicBlocks.end(); }
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const_iterator end () const { return BasicBlocks.end(); }
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2004-11-15 19:02:35 +00:00
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size_t size() const { return BasicBlocks.size(); }
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2002-06-25 16:12:52 +00:00
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bool empty() const { return BasicBlocks.empty(); }
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const BasicBlock &front() const { return BasicBlocks.front(); }
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BasicBlock &front() { return BasicBlocks.front(); }
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2004-10-19 05:50:34 +00:00
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const BasicBlock &back() const { return BasicBlocks.back(); }
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BasicBlock &back() { return BasicBlocks.back(); }
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2002-06-25 16:12:52 +00:00
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//===--------------------------------------------------------------------===//
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// Argument iterator forwarding functions
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//
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2007-08-18 06:14:52 +00:00
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arg_iterator arg_begin() {
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CheckLazyArguments();
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return ArgumentList.begin();
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}
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const_arg_iterator arg_begin() const {
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CheckLazyArguments();
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return ArgumentList.begin();
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}
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arg_iterator arg_end() {
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CheckLazyArguments();
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return ArgumentList.end();
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}
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const_arg_iterator arg_end() const {
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CheckLazyArguments();
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return ArgumentList.end();
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}
|
2005-03-14 23:49:40 +00:00
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2007-08-18 06:14:52 +00:00
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size_t arg_size() const;
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bool arg_empty() const;
|
2005-03-14 23:49:40 +00:00
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2003-10-30 23:41:19 +00:00
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virtual void print(std::ostream &OS) const { print(OS, 0); }
|
2006-12-17 05:15:13 +00:00
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void print(std::ostream *OS) const { if (OS) print(*OS); }
|
2003-10-30 23:41:19 +00:00
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void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
|
2001-06-06 20:29:01 +00:00
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|
2003-10-22 16:03:20 +00:00
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|
/// viewCFG - This function is meant for use from the debugger. You can just
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/// say 'call F->viewCFG()' and a ghostview window should pop up from the
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/// program, displaying the CFG of the current function with the code for each
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/// basic block inside. This depends on there being a 'dot' and 'gv' program
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/// in your path.
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///
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void viewCFG() const;
|
2005-04-21 20:19:05 +00:00
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|
2003-10-22 16:03:20 +00:00
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|
|
/// viewCFGOnly - This function is meant for use from the debugger. It works
|
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|
|
/// just like viewCFG, but it does not include the contents of basic blocks
|
2004-03-01 18:31:19 +00:00
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|
|
/// into the nodes, just the label. If you are only interested in the CFG
|
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|
|
/// this can make the graph smaller.
|
2003-10-22 16:03:20 +00:00
|
|
|
///
|
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|
|
void viewCFGOnly() const;
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|
2002-08-25 22:54:55 +00:00
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|
|
/// Methods for support type inquiry through isa, cast, and dyn_cast:
|
2002-03-23 22:47:28 +00:00
|
|
|
static inline bool classof(const Function *) { return true; }
|
2001-10-02 03:41:24 +00:00
|
|
|
static inline bool classof(const Value *V) {
|
2007-04-13 18:12:09 +00:00
|
|
|
return V->getValueID() == Value::FunctionVal;
|
2001-10-01 16:18:37 +00:00
|
|
|
}
|
2001-06-06 20:29:01 +00:00
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|
|
2003-09-17 04:58:43 +00:00
|
|
|
/// dropAllReferences() - This method causes all the subinstructions to "let
|
2002-08-25 22:54:55 +00:00
|
|
|
/// go" of all references that they are maintaining. This allows one to
|
2003-09-17 04:58:43 +00:00
|
|
|
/// 'delete' a whole module at a time, even though there may be circular
|
2002-08-25 22:54:55 +00:00
|
|
|
/// references... first all references are dropped, and all use counts go to
|
2004-03-01 18:31:19 +00:00
|
|
|
/// zero. Then everything is deleted for real. Note that no operations are
|
2005-04-21 20:19:05 +00:00
|
|
|
/// valid on an object that has "dropped all references", except operator
|
2002-08-25 22:54:55 +00:00
|
|
|
/// delete.
|
|
|
|
///
|
2003-09-17 04:58:43 +00:00
|
|
|
/// 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.
|
|
|
|
///
|
2001-06-06 20:29:01 +00:00
|
|
|
void dropAllReferences();
|
2007-04-17 04:04:14 +00:00
|
|
|
|
|
|
|
static unsigned getBasicBlockListOffset() {
|
|
|
|
Function *Obj = 0;
|
2007-04-17 05:33:04 +00:00
|
|
|
return unsigned(reinterpret_cast<uintptr_t>(&Obj->BasicBlocks));
|
2007-04-17 04:04:14 +00:00
|
|
|
}
|
|
|
|
static unsigned getArgumentListOffset() {
|
|
|
|
Function *Obj = 0;
|
2007-04-17 05:33:04 +00:00
|
|
|
return unsigned(reinterpret_cast<uintptr_t>(&Obj->ArgumentList));
|
2007-04-17 04:04:14 +00:00
|
|
|
}
|
2001-09-28 22:56:31 +00:00
|
|
|
};
|
|
|
|
|
2007-04-17 03:26:42 +00:00
|
|
|
inline ValueSymbolTable *
|
|
|
|
ilist_traits<BasicBlock>::getSymTab(Function *F) {
|
|
|
|
return F ? &F->getValueSymbolTable() : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline ValueSymbolTable *
|
|
|
|
ilist_traits<Argument>::getSymTab(Function *F) {
|
|
|
|
return F ? &F->getValueSymbolTable() : 0;
|
|
|
|
}
|
|
|
|
|
2007-04-17 04:04:14 +00:00
|
|
|
inline int
|
|
|
|
ilist_traits<BasicBlock>::getListOffset() {
|
|
|
|
return Function::getBasicBlockListOffset();
|
|
|
|
}
|
|
|
|
|
|
|
|
inline int
|
|
|
|
ilist_traits<Argument>::getListOffset() {
|
|
|
|
return Function::getArgumentListOffset();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2003-11-11 22:41:34 +00:00
|
|
|
} // End llvm namespace
|
|
|
|
|
2001-06-06 20:29:01 +00:00
|
|
|
#endif
|