//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#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 ParamAttrsList;
+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;
typedef iplist<BasicBlock> BasicBlockListType;
BasicBlockListType BasicBlocks; ///< The basic blocks
mutable ArgumentListType ArgumentList; ///< The formal arguments
ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
- ParamAttrsList *ParamAttrs; ///< 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>;
void setParent(Module *parent);
- Function *Prev, *Next;
- void setNext(Function *N) { Next = N; }
- void setPrev(Function *N) { Prev = N; }
-
- // 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.
- //
- Function *getNext() { return Next; }
- const Function *getNext() const { return Next; }
- Function *getPrev() { return Prev; }
- const Function *getPrev() const { return Prev; }
/// hasLazyArguments/CheckLazyArguments - The argument list of a function is
/// built on demand, so that the list isn't allocated until the first client
/// 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;
-public:
+
+ Function(const Function&); // DO NOT IMPLEMENT
+ void operator=(const Function&); // DO NOT IMPLEMENT
+
/// 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);
+ const Twine &N = "", Module *M = 0);
+
+public:
+ static Function *Create(const 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
+ /// 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;
/// The particular intrinsic functions which correspond to this value are
/// defined in llvm/Intrinsics.h.
///
- unsigned getIntrinsicID(bool noAssert = false) const;
+ unsigned getIntrinsicID() const 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<CallingConv::ID>(getSubclassDataFromValue() >> 1);
+ }
+ void setCallingConv(CallingConv::ID CC) {
+ setValueSubclassData((getSubclassDataFromValue() & 1) |
+ (static_cast<unsigned>(CC) << 1));
}
- /// Obtains a constant pointer to the ParamAttrsList object which holds the
- /// parameter attributes information, if any.
- /// @returns 0 if no parameter attributes have been set.
- /// @brief Get the parameter attributes.
- const ParamAttrsList *getParamAttrs() const { return ParamAttrs; }
+ /// getAttributes - Return the attribute list for this Function.
+ ///
+ const AttrListPtr &getAttributes() const { return AttributeList; }
+
+ /// setAttributes - Set the attribute list for this Function.
+ ///
+ 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);
+ }
+
+ /// addFnAttr - Add function attributes to this function.
+ ///
+ void addFnAttr(Attributes N) {
+ // Function Attributes are stored at ~0 index
+ addAttribute(~0U, N);
+ }
- /// Sets the parameter attributes for this Function. To construct a
- /// ParamAttrsList, see ParameterAttributes.h
- /// @brief Set the parameter attributes.
- void setParamAttrs(ParamAttrsList *attrs);
+ /// 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;
+ const char *getGC() const;
+ 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);
+ }
+
+ /// addAttribute - adds the attribute to the list of attributes.
+ void addAttribute(unsigned i, Attributes attr);
+
+ /// removeAttribute - removes the attribute from the list of attributes.
+ void removeAttribute(unsigned i, Attributes attr);
+
+ /// @brief Extract the alignment for a call or parameter (0=unknown).
+ unsigned getParamAlignment(unsigned i) const {
+ return AttributeList.getParamAlignment(i);
+ }
+
+ /// @brief Determine if the function does not access memory.
+ bool doesNotAccessMemory() const {
+ return hasFnAttr(Attribute::ReadNone);
+ }
+ void setDoesNotAccessMemory(bool DoesNotAccessMemory = true) {
+ 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() || hasFnAttr(Attribute::ReadOnly);
+ }
+ void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
+ if (OnlyReadsMemory) addFnAttr(Attribute::ReadOnly);
+ else removeFnAttr(Attribute::ReadOnly | Attribute::ReadNone);
+ }
+
+ /// @brief Determine if the function cannot return.
+ bool doesNotReturn() const {
+ return hasFnAttr(Attribute::NoReturn);
+ }
+ void setDoesNotReturn(bool DoesNotReturn = true) {
+ if (DoesNotReturn) addFnAttr(Attribute::NoReturn);
+ else removeFnAttr(Attribute::NoReturn);
+ }
+
+ /// @brief Determine if the function cannot unwind.
+ bool doesNotThrow() const {
+ return hasFnAttr(Attribute::NoUnwind);
+ }
+ void setDoesNotThrow(bool DoesNotThrow = true) {
+ if (DoesNotThrow) addFnAttr(Attribute::NoUnwind);
+ else removeFnAttr(Attribute::NoUnwind);
+ }
+
+ /// @brief Determine if the function returns a structure through first
+ /// pointer argument.
+ bool hasStructRetAttr() const {
+ 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);
/// deleteBody - This method deletes the body of the function, and converts
/// the linkage to external.
/// removeFromParent - This method unlinks 'this' from the containing module,
/// but does not delete it.
///
- void removeFromParent();
+ virtual void removeFromParent();
/// eraseFromParent - This method unlinks 'this' from the containing module
/// and deletes it.
///
- void eraseFromParent();
+ virtual void eraseFromParent();
/// Get the underlying elements of the Function... the basic block list is
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(); }
size_t arg_size() const;
bool arg_empty() const;
- virtual void print(std::ostream &OS) const { print(OS, 0); }
- void print(std::ostream *OS) const { if (OS) print(*OS); }
- void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
-
/// viewCFG - This function is meant for use from the debugger. You can just
/// say 'call F->viewCFG()' and a ghostview window should pop up from the
/// program, displaying the CFG of the current function with the code for each
/// 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. Optionally passes back the
+ /// offending user for diagnostic purposes.
+ ///
+ bool hasAddressTaken(const User** = 0) 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