X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FFunction.cpp;h=9f7eefe1a6bfdb1eb060cd30e021c71e6b9ad4d9;hb=b1dbcd886a4b5597a839f299054b78b33fb2d6df;hp=e47798e12cd277b0dcb264f046209896ff20babc;hpb=f8dfef74376dd85f37601855f7519d8256700dab;p=oota-llvm.git diff --git a/lib/VMCore/Function.cpp b/lib/VMCore/Function.cpp index e47798e12cd..9f7eefe1a6b 100644 --- a/lib/VMCore/Function.cpp +++ b/lib/VMCore/Function.cpp @@ -2,8 +2,8 @@ // // 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. // //===----------------------------------------------------------------------===// // @@ -13,15 +13,18 @@ #include "llvm/Module.h" #include "llvm/DerivedTypes.h" -#include "llvm/ParameterAttributes.h" #include "llvm/IntrinsicInst.h" +#include "llvm/CodeGen/ValueTypes.h" #include "llvm/Support/LeakDetector.h" +#include "llvm/Support/StringPool.h" #include "SymbolTableListTraitsImpl.h" +#include "llvm/ADT/BitVector.h" +#include "llvm/ADT/DenseMap.h" #include "llvm/ADT/StringExtras.h" using namespace llvm; BasicBlock *ilist_traits::createSentinel() { - BasicBlock *Ret = new BasicBlock(); + BasicBlock *Ret = BasicBlock::Create(); // This should not be garbage monitored. LeakDetector::removeGarbageObject(Ret); return Ret; @@ -71,67 +74,79 @@ void Argument::setParent(Function *parent) { 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; + + return ArgIdx; +} + +/// hasByValAttr - Return true if this argument has the byval attribute on it +/// in its containing function. +bool Argument::hasByValAttr() const { + if (!isa(getType())) return false; + return getParent()->paramHasAttr(getArgNo()+1, ParamAttr::ByVal); +} + +/// hasNoAliasAttr - Return true if this argument has the noalias attribute on +/// it in its containing function. +bool Argument::hasNoAliasAttr() const { + if (!isa(getType())) return false; + return getParent()->paramHasAttr(getArgNo()+1, ParamAttr::NoAlias); +} + +/// hasSRetAttr - Return true if this argument has the sret attribute on +/// it in its containing function. +bool Argument::hasStructRetAttr() const { + if (!isa(getType())) return false; + if (this != getParent()->arg_begin()) + return false; // StructRet param must be first param + return getParent()->paramHasAttr(1, ParamAttr::StructRet); +} + +/// addAttr - Add a ParamAttr to an argument +void Argument::addAttr(ParameterAttributes attr) { + getParent()->setParamAttrs( + getParent()->getParamAttrs().addAttr(getArgNo() + 1, attr)); +} + +/// removeAttr - Remove a ParamAttr from an argument +void Argument::removeAttr(ParameterAttributes attr) { + getParent()->setParamAttrs( + getParent()->getParamAttrs().removeAttr(getArgNo() + 1, attr)); +} + + + //===----------------------------------------------------------------------===// -// ParamAttrsList Implementation +// Helper Methods in Function //===----------------------------------------------------------------------===// -uint16_t -ParamAttrsList::getParamAttrs(uint16_t Index) const { - unsigned limit = attrs.size(); - for (unsigned i = 0; i < limit; ++i) - if (attrs[i].index == Index) - return attrs[i].attrs; - return ParamAttr::None; -} - - -std::string -ParamAttrsList::getParamAttrsText(uint16_t Attrs) { - std::string Result; - if (Attrs & ParamAttr::ZExt) - Result += "zext "; - if (Attrs & ParamAttr::SExt) - Result += "sext "; - if (Attrs & ParamAttr::NoReturn) - Result += "noreturn "; - if (Attrs & ParamAttr::NoUnwind) - Result += "nounwind "; - if (Attrs & ParamAttr::InReg) - Result += "inreg "; - if (Attrs & ParamAttr::StructRet) - Result += "sret "; - return Result; +const FunctionType *Function::getFunctionType() const { + return cast(getType()->getElementType()); } -void -ParamAttrsList::addAttributes(uint16_t Index, uint16_t Attrs) { - // First, try to replace an existing one - for (unsigned i = 0; i < attrs.size(); ++i) - if (attrs[i].index == Index) { - attrs[i].attrs |= Attrs; - return; - } +bool Function::isVarArg() const { + return getFunctionType()->isVarArg(); +} - // If not found, add a new one - ParamAttrsWithIndex Val; - Val.attrs = Attrs; - Val.index = Index; - attrs.push_back(Val); -} - -void -ParamAttrsList::removeAttributes(uint16_t Index, uint16_t Attrs) { - // Find the index from which to remove the attributes - for (unsigned i = 0; i < attrs.size(); ++i) - if (attrs[i].index == Index) { - attrs[i].attrs &= ~Attrs; - if (attrs[i].attrs == ParamAttr::None) - attrs.erase(&attrs[i]); - return; - } +const Type *Function::getReturnType() const { + return getFunctionType()->getReturnType(); +} + +void Function::removeFromParent() { + getParent()->getFunctionList().remove(this); +} - // The index wasn't found above - assert(0 && "Index not found for removeAttributes"); +void Function::eraseFromParent() { + getParent()->getFunctionList().erase(this); } //===----------------------------------------------------------------------===// @@ -140,26 +155,27 @@ ParamAttrsList::removeAttributes(uint16_t Index, uint16_t Attrs) { Function::Function(const FunctionType *Ty, LinkageTypes Linkage, const std::string &name, Module *ParentModule) - : GlobalValue(PointerType::get(Ty), Value::FunctionVal, 0, 0, Linkage, name) { - ParamAttrs = 0; - CallingConvention = 0; + : GlobalValue(PointerType::getUnqual(Ty), + Value::FunctionVal, 0, 0, Linkage, name) { SymTab = new ValueSymbolTable(); - assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy) + assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy + || isa(getReturnType())) && "LLVM functions cannot return aggregate values!"); - // Create the arguments vector, all arguments start out unnamed. - for (unsigned i = 0, e = Ty->getNumParams(); i != e; ++i) { - assert(Ty->getParamType(i) != Type::VoidTy && - "Cannot have void typed arguments!"); - ArgumentList.push_back(new Argument(Ty->getParamType(i))); - } - + // If the function has arguments, mark them as lazily built. + if (Ty->getNumParams()) + SubclassData = 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(true)) + setParamAttrs(Intrinsic::getParamAttrs(Intrinsic::ID(IID))); } Function::~Function() { @@ -168,34 +184,37 @@ Function::~Function() { // Delete all of the method arguments and unlink from symbol table... ArgumentList.clear(); delete SymTab; -} - -void Function::setParent(Module *parent) { - if (getParent()) - LeakDetector::addGarbageObject(this); - Parent = parent; - if (getParent()) - LeakDetector::removeGarbageObject(this); -} -const FunctionType *Function::getFunctionType() const { - return cast(getType()->getElementType()); + // Remove the function from the on-the-side collector table. + clearCollector(); } -bool Function::isVarArg() const { - return getFunctionType()->isVarArg(); +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) != Type::VoidTy && + "Cannot have void typed arguments!"); + ArgumentList.push_back(new Argument(FT->getParamType(i))); + } + + // Clear the lazy arguments bit. + const_cast(this)->SubclassData &= ~1; } -const Type *Function::getReturnType() const { - return getFunctionType()->getReturnType(); +size_t Function::arg_size() const { + return getFunctionType()->getNumParams(); } - -void Function::removeFromParent() { - getParent()->getFunctionList().remove(this); +bool Function::arg_empty() const { + return getFunctionType()->getNumParams() == 0; } -void Function::eraseFromParent() { - getParent()->getFunctionList().erase(this); +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 @@ -212,6 +231,53 @@ void Function::dropAllReferences() { BasicBlocks.clear(); // Delete all basic blocks... } +void Function::setDoesNotThrow(bool doesNotThrow) { + PAListPtr PAL = getParamAttrs(); + if (doesNotThrow) + PAL = PAL.addAttr(0, ParamAttr::NoUnwind); + else + PAL = PAL.removeAttr(0, ParamAttr::NoUnwind); + setParamAttrs(PAL); +} + +// Maintain the collector 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 *CollectorNames; +static StringPool *CollectorNamePool; + +bool Function::hasCollector() const { + return CollectorNames && CollectorNames->count(this); +} + +const char *Function::getCollector() const { + assert(hasCollector() && "Function has no collector"); + return *(*CollectorNames)[this]; +} + +void Function::setCollector(const char *Str) { + if (!CollectorNamePool) + CollectorNamePool = new StringPool(); + if (!CollectorNames) + CollectorNames = new DenseMap(); + (*CollectorNames)[this] = CollectorNamePool->intern(Str); +} + +void Function::clearCollector() { + if (CollectorNames) { + CollectorNames->erase(this); + if (CollectorNames->empty()) { + delete CollectorNames; + CollectorNames = 0; + if (CollectorNamePool->empty()) { + delete CollectorNamePool; + CollectorNamePool = 0; + } + } + } +} + /// 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 @@ -252,12 +318,12 @@ std::string Intrinsic::getName(ID id, const Type **Tys, unsigned numTys) { std::string Result(Table[id]); for (unsigned i = 0; i < numTys; ++i) if (Tys[i]) - Result += "." + Tys[i]->getDescription(); + Result += "." + MVT::getValueTypeString(MVT::getValueType(Tys[i])); return Result; } const FunctionType *Intrinsic::getType(ID id, const Type **Tys, - uint32_t numTys) { + unsigned numTys) { const Type *ResultTy = NULL; std::vector ArgTys; bool IsVarArg = false; @@ -269,39 +335,27 @@ const FunctionType *Intrinsic::getType(ID id, const Type **Tys, return FunctionType::get(ResultTy, ArgTys, IsVarArg); } +PAListPtr Intrinsic::getParamAttrs(ID id) { + ParameterAttributes Attr = ParamAttr::None; + +#define GET_INTRINSIC_ATTRIBUTES +#include "llvm/Intrinsics.gen" +#undef GET_INTRINSIC_ATTRIBUTES + + // Intrinsics cannot throw exceptions. + Attr |= ParamAttr::NoUnwind; + + ParamAttrsWithIndex PAWI = ParamAttrsWithIndex::get(0, Attr); + return PAListPtr::get(&PAWI, 1); +} + 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(M->getOrInsertFunction(getName(id, Tys, numTys), - getType(id, Tys, numTys))); -} - -Value *IntrinsicInst::StripPointerCasts(Value *Ptr) { - if (ConstantExpr *CE = dyn_cast(Ptr)) { - if (CE->getOpcode() == Instruction::BitCast) { - if (isa(CE->getOperand(0)->getType())) - return StripPointerCasts(CE->getOperand(0)); - } else if (CE->getOpcode() == Instruction::GetElementPtr) { - for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) - if (!CE->getOperand(i)->isNullValue()) - return Ptr; - return StripPointerCasts(CE->getOperand(0)); - } - return Ptr; - } - - if (BitCastInst *CI = dyn_cast(Ptr)) { - if (isa(CI->getOperand(0)->getType())) - return StripPointerCasts(CI->getOperand(0)); - } else if (GetElementPtrInst *GEP = dyn_cast(Ptr)) { - for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i) - if (!isa(GEP->getOperand(i)) || - !cast(GEP->getOperand(i))->isNullValue()) - return Ptr; - return StripPointerCasts(GEP->getOperand(0)); - } - return Ptr; + // There can never be multiple globals with the same name of different types, + // because intrinsics must be a specific type. + return + cast(M->getOrInsertFunction(getName(id, Tys, numTys), + getType(id, Tys, numTys))); } // vim: sw=2 ai