-//===-- Function.cpp - Implement the Global object classes -------*- C++ -*--=//
+//===-- Function.cpp - Implement the Global object classes ----------------===//
//
-// This file implements the Function & GlobalVariable classes for the VMCore
-// library.
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Function class for the VMCore library.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Function.h"
-#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/iOther.h"
-#include "llvm/Argument.h"
-#include "ValueHolderImpl.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Support/LeakDetector.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/StringPool.h"
+#include "llvm/Support/RWMutex.h"
+#include "llvm/Support/Threading.h"
+#include "SymbolTableListTraitsImpl.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringExtras.h"
+using namespace llvm;
+
+
+// Explicit instantiations of SymbolTableListTraits since some of the methods
+// are not in the public header file...
+template class llvm::SymbolTableListTraits<Argument, Function>;
+template class llvm::SymbolTableListTraits<BasicBlock, Function>;
//===----------------------------------------------------------------------===//
// Argument Implementation
//===----------------------------------------------------------------------===//
-// Specialize setName to take care of symbol table majik
-void Argument::setName(const std::string &name, SymbolTable *ST) {
- Function *P;
- assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
- "Invalid symtab argument!");
- if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
- Value::setName(name);
- if (P && hasName()) P->getSymbolTable()->insert(this);
+Argument::Argument(const Type *Ty, const Twine &Name, Function *Par)
+ : Value(Ty, Value::ArgumentVal) {
+ Parent = 0;
+
+ // Make sure that we get added to a function
+ LeakDetector::addGarbageObject(this);
+
+ if (Par)
+ Par->getArgumentList().push_back(this);
+ setName(Name);
}
+void Argument::setParent(Function *parent) {
+ if (getParent())
+ LeakDetector::addGarbageObject(this);
+ Parent = parent;
+ if (getParent())
+ LeakDetector::removeGarbageObject(this);
+}
+/// getArgNo - Return the index of this formal argument in its containing
+/// function. For example in "void foo(int a, float b)" a is 0 and b is 1.
+unsigned Argument::getArgNo() const {
+ const Function *F = getParent();
+ assert(F && "Argument is not in a function");
+
+ Function::const_arg_iterator AI = F->arg_begin();
+ unsigned ArgIdx = 0;
+ for (; &*AI != this; ++AI)
+ ++ArgIdx;
-//===----------------------------------------------------------------------===//
-// Function Implementation
-//===----------------------------------------------------------------------===//
+ return ArgIdx;
+}
+/// hasByValAttr - Return true if this argument has the byval attribute on it
+/// in its containing function.
+bool Argument::hasByValAttr() const {
+ if (!getType()->isPointerTy()) return false;
+ return getParent()->paramHasAttr(getArgNo()+1, Attribute::ByVal);
+}
-// Instantiate Templates - This ugliness is the price we have to pay
-// for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
-//
-template class ValueHolder<Argument , Function, Function>;
-template class ValueHolder<BasicBlock, Function, Function>;
+/// hasNestAttr - Return true if this argument has the nest attribute on
+/// it in its containing function.
+bool Argument::hasNestAttr() const {
+ if (!getType()->isPointerTy()) return false;
+ return getParent()->paramHasAttr(getArgNo()+1, Attribute::Nest);
+}
-Function::Function(const FunctionType *Ty, bool isInternal,
- const std::string &name)
- : GlobalValue(PointerType::get(Ty), Value::FunctionVal, isInternal, name),
- BasicBlocks(this), ArgumentList(this, this) {
- ParentSymTab = SymTab = 0;
+/// hasNoAliasAttr - Return true if this argument has the noalias attribute on
+/// it in its containing function.
+bool Argument::hasNoAliasAttr() const {
+ if (!getType()->isPointerTy()) return false;
+ return getParent()->paramHasAttr(getArgNo()+1, Attribute::NoAlias);
}
-Function::~Function() {
- dropAllReferences(); // After this it is safe to delete instructions.
+/// hasNoCaptureAttr - Return true if this argument has the nocapture attribute
+/// on it in its containing function.
+bool Argument::hasNoCaptureAttr() const {
+ if (!getType()->isPointerTy()) return false;
+ return getParent()->paramHasAttr(getArgNo()+1, Attribute::NoCapture);
+}
- // TODO: Should remove from the end, not the beginning of vector!
- iterator BI = begin();
- while ((BI = begin()) != end())
- delete BasicBlocks.remove(BI);
+/// hasSRetAttr - Return true if this argument has the sret attribute on
+/// it in its containing function.
+bool Argument::hasStructRetAttr() const {
+ if (!getType()->isPointerTy()) return false;
+ if (this != getParent()->arg_begin())
+ return false; // StructRet param must be first param
+ return getParent()->paramHasAttr(1, Attribute::StructRet);
+}
- // Delete all of the method arguments and unlink from symbol table...
- ArgumentList.delete_all();
- ArgumentList.setParent(0);
- delete SymTab;
+/// addAttr - Add a Attribute to an argument
+void Argument::addAttr(Attributes attr) {
+ getParent()->addAttribute(getArgNo() + 1, attr);
}
-// Specialize setName to take care of symbol table majik
-void Function::setName(const std::string &name, SymbolTable *ST) {
- Module *P;
- assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
- "Invalid symtab argument!");
- if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
- Value::setName(name);
- if (P && getName() != "") P->getSymbolTableSure()->insert(this);
+/// removeAttr - Remove a Attribute from an argument
+void Argument::removeAttr(Attributes attr) {
+ getParent()->removeAttribute(getArgNo() + 1, attr);
}
-void Function::setParent(Module *parent) {
- Parent = parent;
- // Relink symbol tables together...
- ParentSymTab = Parent ? Parent->getSymbolTableSure() : 0;
- if (SymTab) SymTab->setParentSymTab(ParentSymTab);
+//===----------------------------------------------------------------------===//
+// Helper Methods in Function
+//===----------------------------------------------------------------------===//
+
+LLVMContext &Function::getContext() const {
+ return getType()->getContext();
}
const FunctionType *Function::getFunctionType() const {
return cast<FunctionType>(getType()->getElementType());
}
-const Type *Function::getReturnType() const {
+bool Function::isVarArg() const {
+ return getFunctionType()->isVarArg();
+}
+
+const Type *Function::getReturnType() const {
return getFunctionType()->getReturnType();
}
-SymbolTable *Function::getSymbolTableSure() {
- if (!SymTab) SymTab = new SymbolTable(ParentSymTab);
- return SymTab;
+void Function::removeFromParent() {
+ getParent()->getFunctionList().remove(this);
}
-// hasSymbolTable() - Returns true if there is a symbol table allocated to
-// this object AND if there is at least one name in it!
-//
-bool Function::hasSymbolTable() const {
- if (!SymTab) return false;
+void Function::eraseFromParent() {
+ getParent()->getFunctionList().erase(this);
+}
+
+//===----------------------------------------------------------------------===//
+// Function Implementation
+//===----------------------------------------------------------------------===//
+
+Function::Function(const FunctionType *Ty, LinkageTypes Linkage,
+ const Twine &name, Module *ParentModule)
+ : GlobalValue(PointerType::getUnqual(Ty),
+ Value::FunctionVal, 0, 0, Linkage, name) {
+ assert(FunctionType::isValidReturnType(getReturnType()) &&
+ !getReturnType()->isOpaqueTy() && "invalid return type");
+ SymTab = new ValueSymbolTable();
+
+ // If the function has arguments, mark them as lazily built.
+ if (Ty->getNumParams())
+ setValueSubclassData(1); // Set the "has lazy arguments" bit.
+
+ // Make sure that we get added to a function
+ LeakDetector::addGarbageObject(this);
+
+ if (ParentModule)
+ ParentModule->getFunctionList().push_back(this);
+
+ // Ensure intrinsics have the right parameter attributes.
+ if (unsigned IID = getIntrinsicID())
+ setAttributes(Intrinsic::getAttributes(Intrinsic::ID(IID)));
+
+}
+
+Function::~Function() {
+ dropAllReferences(); // After this it is safe to delete instructions.
- for (SymbolTable::const_iterator I = SymTab->begin();
- I != SymTab->end(); ++I) {
- if (I->second.begin() != I->second.end())
- return true; // Found nonempty type plane!
+ // Delete all of the method arguments and unlink from symbol table...
+ ArgumentList.clear();
+ delete SymTab;
+
+ // Remove the function from the on-the-side GC table.
+ clearGC();
+}
+
+void Function::BuildLazyArguments() const {
+ // Create the arguments vector, all arguments start out unnamed.
+ const FunctionType *FT = getFunctionType();
+ for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
+ assert(!FT->getParamType(i)->isVoidTy() &&
+ "Cannot have void typed arguments!");
+ ArgumentList.push_back(new Argument(FT->getParamType(i)));
}
- return false;
+ // Clear the lazy arguments bit.
+ unsigned SDC = getSubclassDataFromValue();
+ const_cast<Function*>(this)->setValueSubclassData(SDC &= ~1);
}
+size_t Function::arg_size() const {
+ return getFunctionType()->getNumParams();
+}
+bool Function::arg_empty() const {
+ return getFunctionType()->getNumParams() == 0;
+}
+
+void Function::setParent(Module *parent) {
+ if (getParent())
+ LeakDetector::addGarbageObject(this);
+ Parent = parent;
+ if (getParent())
+ LeakDetector::removeGarbageObject(this);
+}
// 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
+// zero. Then everything is deleted for real. Note that no operations are
+// valid on an object that has "dropped all references", except operator
// delete.
//
void Function::dropAllReferences() {
- for_each(begin(), end(), std::mem_fun(&BasicBlock::dropAllReferences));
+ for (iterator I = begin(), E = end(); I != E; ++I)
+ I->dropAllReferences();
+
+ // Delete all basic blocks. They are now unused, except possibly by
+ // blockaddresses, but BasicBlock's destructor takes care of those.
+ while (!BasicBlocks.empty())
+ BasicBlocks.begin()->eraseFromParent();
}
-//===----------------------------------------------------------------------===//
-// GlobalVariable Implementation
-//===----------------------------------------------------------------------===//
+void Function::addAttribute(unsigned i, Attributes attr) {
+ AttrListPtr PAL = getAttributes();
+ PAL = PAL.addAttr(i, attr);
+ setAttributes(PAL);
+}
+
+void Function::removeAttribute(unsigned i, Attributes attr) {
+ AttrListPtr PAL = getAttributes();
+ PAL = PAL.removeAttr(i, attr);
+ setAttributes(PAL);
+}
+
+// Maintain the GC name for each function in an on-the-side table. This saves
+// allocating an additional word in Function for programs which do not use GC
+// (i.e., most programs) at the cost of increased overhead for clients which do
+// use GC.
+static DenseMap<const Function*,PooledStringPtr> *GCNames;
+static StringPool *GCNamePool;
+static ManagedStatic<sys::SmartRWMutex<true> > GCLock;
+
+bool Function::hasGC() const {
+ sys::SmartScopedReader<true> Reader(*GCLock);
+ return GCNames && GCNames->count(this);
+}
+
+const char *Function::getGC() const {
+ assert(hasGC() && "Function has no collector");
+ sys::SmartScopedReader<true> Reader(*GCLock);
+ return *(*GCNames)[this];
+}
+
+void Function::setGC(const char *Str) {
+ sys::SmartScopedWriter<true> Writer(*GCLock);
+ if (!GCNamePool)
+ GCNamePool = new StringPool();
+ if (!GCNames)
+ GCNames = new DenseMap<const Function*,PooledStringPtr>();
+ (*GCNames)[this] = GCNamePool->intern(Str);
+}
+
+void Function::clearGC() {
+ sys::SmartScopedWriter<true> Writer(*GCLock);
+ if (GCNames) {
+ GCNames->erase(this);
+ if (GCNames->empty()) {
+ delete GCNames;
+ GCNames = 0;
+ if (GCNamePool->empty()) {
+ delete GCNamePool;
+ GCNamePool = 0;
+ }
+ }
+ }
+}
+
+/// copyAttributesFrom - copy all additional attributes (those not needed to
+/// create a Function) from the Function Src to this one.
+void Function::copyAttributesFrom(const GlobalValue *Src) {
+ assert(isa<Function>(Src) && "Expected a Function!");
+ GlobalValue::copyAttributesFrom(Src);
+ const Function *SrcF = cast<Function>(Src);
+ setCallingConv(SrcF->getCallingConv());
+ setAttributes(SrcF->getAttributes());
+ if (SrcF->hasGC())
+ setGC(SrcF->getGC());
+ else
+ clearGC();
+}
+
+/// getIntrinsicID - This method returns the ID number of the specified
+/// function, or Intrinsic::not_intrinsic if the function is not an
+/// intrinsic, 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 Function::getIntrinsicID() const {
+ const ValueName *ValName = this->getValueName();
+ if (!ValName)
+ return 0;
+ unsigned Len = ValName->getKeyLength();
+ const char *Name = ValName->getKeyData();
+
+ if (Len < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l'
+ || Name[2] != 'v' || Name[3] != 'm')
+ return 0; // All intrinsics start with 'llvm.'
+
+#define GET_FUNCTION_RECOGNIZER
+#include "llvm/Intrinsics.gen"
+#undef GET_FUNCTION_RECOGNIZER
+ return 0;
+}
+
+std::string Intrinsic::getName(ID id, const Type **Tys, unsigned numTys) {
+ assert(id < num_intrinsics && "Invalid intrinsic ID!");
+ const char * const Table[] = {
+ "not_intrinsic",
+#define GET_INTRINSIC_NAME_TABLE
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_NAME_TABLE
+ };
+ if (numTys == 0)
+ return Table[id];
+ std::string Result(Table[id]);
+ for (unsigned i = 0; i < numTys; ++i) {
+ if (const PointerType* PTyp = dyn_cast<PointerType>(Tys[i])) {
+ Result += ".p" + llvm::utostr(PTyp->getAddressSpace()) +
+ EVT::getEVT(PTyp->getElementType()).getEVTString();
+ }
+ else if (Tys[i])
+ Result += "." + EVT::getEVT(Tys[i]).getEVTString();
+ }
+ return Result;
+}
+
+const FunctionType *Intrinsic::getType(LLVMContext &Context,
+ ID id, const Type **Tys,
+ unsigned numTys) {
+ const Type *ResultTy = NULL;
+ std::vector<const Type*> ArgTys;
+ bool IsVarArg = false;
+
+#define GET_INTRINSIC_GENERATOR
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_GENERATOR
+
+ return FunctionType::get(ResultTy, ArgTys, IsVarArg);
+}
+
+bool Intrinsic::isOverloaded(ID id) {
+ const bool OTable[] = {
+ false,
+#define GET_INTRINSIC_OVERLOAD_TABLE
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_OVERLOAD_TABLE
+ };
+ return OTable[id];
+}
+
+/// This defines the "Intrinsic::getAttributes(ID id)" method.
+#define GET_INTRINSIC_ATTRIBUTES
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_ATTRIBUTES
-GlobalVariable::GlobalVariable(const Type *Ty, bool constant, bool isIntern,
- Constant *Initializer = 0,
- const std::string &Name = "")
- : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, isIntern, Name),
- isConstantGlobal(constant) {
- if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
+Function *Intrinsic::getDeclaration(Module *M, ID id, const Type **Tys,
+ unsigned numTys) {
+ // There can never be multiple globals with the same name of different types,
+ // because intrinsics must be a specific type.
+ return
+ cast<Function>(M->getOrInsertFunction(getName(id, Tys, numTys),
+ getType(M->getContext(),
+ id, Tys, numTys)));
}
-// Specialize setName to take care of symbol table majik
-void GlobalVariable::setName(const std::string &name, SymbolTable *ST) {
- Module *P;
- assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
- "Invalid symtab argument!");
- if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
- Value::setName(name);
- if (P && getName() != "") P->getSymbolTableSure()->insert(this);
+// This defines the "Intrinsic::getIntrinsicForGCCBuiltin()" method.
+#define GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
+#include "llvm/Intrinsics.gen"
+#undef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
+
+/// hasAddressTaken - returns true if there are any uses of this function
+/// other than direct calls or invokes to it.
+bool Function::hasAddressTaken(const User* *PutOffender) const {
+ for (Value::const_use_iterator I = use_begin(), E = use_end(); I != E; ++I) {
+ const User *U = *I;
+ if (!isa<CallInst>(U) && !isa<InvokeInst>(U))
+ return PutOffender ? (*PutOffender = U, true) : true;
+ ImmutableCallSite CS(cast<Instruction>(U));
+ if (!CS.isCallee(I))
+ return PutOffender ? (*PutOffender = U, true) : true;
+ }
+ return false;
}
+
+// vim: sw=2 ai
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