//===-- Function.cpp - Implement the Global object classes ----------------===//
-//
+//
// 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.
+//
//===----------------------------------------------------------------------===//
//
-// This file implements the Function & GlobalVariable classes for the VMCore
-// library.
+// This file implements the Function class for the VMCore library.
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/DerivedTypes.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<BasicBlock>::createSentinal() {
- BasicBlock *Ret = new BasicBlock();
+BasicBlock *ilist_traits<BasicBlock>::createSentinel() {
+ BasicBlock *Ret = BasicBlock::Create();
// This should not be garbage monitored.
LeakDetector::removeGarbageObject(Ret);
return Ret;
return F->getBasicBlockList();
}
-Argument *ilist_traits<Argument>::createSentinal() {
- Argument *Ret = new Argument(Type::IntTy);
+Argument *ilist_traits<Argument>::createSentinel() {
+ Argument *Ret = new Argument(Type::Int32Ty);
// This should not be garbage monitored.
LeakDetector::removeGarbageObject(Ret);
return Ret;
// Explicit instantiations of SymbolTableListTraits since some of the methods
// are not in the public header file...
-template class SymbolTableListTraits<Argument, Function, Function>;
-template class SymbolTableListTraits<BasicBlock, Function, Function>;
+template class SymbolTableListTraits<Argument, Function>;
+template class SymbolTableListTraits<BasicBlock, Function>;
//===----------------------------------------------------------------------===//
// Argument Implementation
//===----------------------------------------------------------------------===//
-Argument::Argument(const Type *Ty, const std::string &Name, Function *Par)
- : Value(Ty, Value::ArgumentVal, Name) {
+Argument::Argument(const Type *Ty, const std::string &Name, Function *Par)
+ : Value(Ty, Value::ArgumentVal) {
Parent = 0;
// Make sure that we get added to a function
if (Par)
Par->getArgumentList().push_back(this);
-}
-
-
-// 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);
+ setName(Name);
}
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<PointerType>(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<PointerType>(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<PointerType>(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()->addParamAttr(getArgNo() + 1, attr);
+}
+
+/// removeAttr - Remove a ParamAttr from an argument
+void Argument::removeAttr(ParameterAttributes attr) {
+ getParent()->removeParamAttr(getArgNo() + 1, attr);
+}
+
+
+//===----------------------------------------------------------------------===//
+// Helper Methods in Function
+//===----------------------------------------------------------------------===//
+
+const FunctionType *Function::getFunctionType() const {
+ return cast<FunctionType>(getType()->getElementType());
+}
+
+bool Function::isVarArg() const {
+ return getFunctionType()->isVarArg();
+}
+
+const Type *Function::getReturnType() const {
+ return getFunctionType()->getReturnType();
+}
+
+void Function::removeFromParent() {
+ getParent()->getFunctionList().remove(this);
+}
+
+void Function::eraseFromParent() {
+ getParent()->getFunctionList().erase(this);
+}
+
//===----------------------------------------------------------------------===//
// Function Implementation
//===----------------------------------------------------------------------===//
Function::Function(const FunctionType *Ty, LinkageTypes Linkage,
const std::string &name, Module *ParentModule)
- : GlobalValue(PointerType::get(Ty), Value::FunctionVal, 0, 0, Linkage, name) {
- BasicBlocks.setItemParent(this);
- BasicBlocks.setParent(this);
- ArgumentList.setItemParent(this);
- ArgumentList.setParent(this);
- SymTab = new SymbolTable();
-
- assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy)
- && "LLVM functions cannot return aggregate values!");
+ : GlobalValue(PointerType::getUnqual(Ty),
+ Value::FunctionVal, 0, 0, Linkage, name) {
+ SymTab = new ValueSymbolTable();
- // 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)));
- }
+ assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy
+ || isa<StructType>(getReturnType()))
+ && "LLVM functions cannot return aggregate values!");
+ // 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() {
// Delete all of the method arguments and unlink from symbol table...
ArgumentList.clear();
- ArgumentList.setParent(0);
delete SymTab;
+
+ // Remove the function from the on-the-side GC table.
+ clearGC();
}
-// 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 && hasName()) P->getSymbolTable().insert(this);
+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<Function*>(this)->SubclassData &= ~1;
+}
+
+size_t Function::arg_size() const {
+ return getFunctionType()->getNumParams();
+}
+bool Function::arg_empty() const {
+ return getFunctionType()->getNumParams() == 0;
}
void Function::setParent(Module *parent) {
LeakDetector::removeGarbageObject(this);
}
-const FunctionType *Function::getFunctionType() const {
- return cast<FunctionType>(getType()->getElementType());
+// 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 deleted for real. Note that no operations are
+// valid on an object that has "dropped all references", except operator
+// delete.
+//
+void Function::dropAllReferences() {
+ for (iterator I = begin(), E = end(); I != E; ++I)
+ I->dropAllReferences();
+ BasicBlocks.clear(); // Delete all basic blocks...
}
-bool Function::isVarArg() const {
- return getFunctionType()->isVarArg();
+void Function::addParamAttr(unsigned i, ParameterAttributes attr) {
+ PAListPtr PAL = getParamAttrs();
+ PAL = PAL.addAttr(i, attr);
+ setParamAttrs(PAL);
}
-const Type *Function::getReturnType() const {
- return getFunctionType()->getReturnType();
+void Function::removeParamAttr(unsigned i, ParameterAttributes attr) {
+ PAListPtr PAL = getParamAttrs();
+ PAL = PAL.removeAttr(i, attr);
+ setParamAttrs(PAL);
}
-void Function::removeFromParent() {
- getParent()->getFunctionList().remove(this);
+// 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;
+
+bool Function::hasGC() const {
+ return GCNames && GCNames->count(this);
}
-void Function::eraseFromParent() {
- getParent()->getFunctionList().erase(this);
+const char *Function::getGC() const {
+ assert(hasGC() && "Function has no collector");
+ return *(*GCNames)[this];
}
+void Function::setGC(const char *Str) {
+ if (!GCNamePool)
+ GCNamePool = new StringPool();
+ if (!GCNames)
+ GCNames = new DenseMap<const Function*,PooledStringPtr>();
+ (*GCNames)[this] = GCNamePool->intern(Str);
+}
-/// renameLocalSymbols - This method goes through the Function's symbol table
-/// and renames any symbols that conflict with symbols at global scope. This is
-/// required before printing out to a textual form, to ensure that there is no
-/// ambiguity when parsing.
-void Function::renameLocalSymbols() {
- SymbolTable &LST = getSymbolTable(); // Local Symtab
- SymbolTable &GST = getParent()->getSymbolTable(); // Global Symtab
-
- for (SymbolTable::plane_iterator LPI = LST.plane_begin(), E = LST.plane_end();
- LPI != E; ++LPI)
- // All global symbols are of pointer type, ignore any non-pointer planes.
- if (isa<PointerType>(LPI->first)) {
- // Only check if the global plane has any symbols of this type.
- SymbolTable::plane_iterator GPI = GST.find(LPI->first);
- if (GPI != GST.plane_end()) {
- SymbolTable::ValueMap &LVM = LPI->second;
- const SymbolTable::ValueMap &GVM = GPI->second;
-
- // Loop over all local symbols, renaming those that are in the global
- // symbol table already.
- for (SymbolTable::value_iterator VI = LVM.begin(), E = LVM.end();
- VI != E;) {
- Value *V = VI->second;
- const std::string &Name = VI->first;
- ++VI;
- if (GVM.count(Name)) {
- static unsigned UniqueNum = 0;
- // Find a name that does not conflict!
- while (GVM.count(Name + "_" + utostr(++UniqueNum)) ||
- LVM.count(Name + "_" + utostr(UniqueNum)))
- /* scan for UniqueNum that works */;
- V->setName(Name + "_" + utostr(UniqueNum));
- }
- }
+void Function::clearGC() {
+ if (GCNames) {
+ GCNames->erase(this);
+ if (GCNames->empty()) {
+ delete GCNames;
+ GCNames = 0;
+ if (GCNamePool->empty()) {
+ delete GCNamePool;
+ GCNamePool = 0;
}
}
+ }
}
-
-// 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 deleted for real. Note that no operations are
-// valid on an object that has "dropped all references", except operator
-// delete.
-//
-void Function::dropAllReferences() {
- for (iterator I = begin(), E = end(); I != E; ++I)
- I->dropAllReferences();
- BasicBlocks.clear(); // Delete all basic blocks...
+/// 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());
+ setParamAttrs(SrcF->getParamAttrs());
+ if (SrcF->hasGC())
+ setGC(SrcF->getGC());
+ else
+ clearGC();
}
/// getIntrinsicID - This method returns the ID number of the specified
/// particular intrinsic functions which correspond to this value are defined in
/// llvm/Intrinsics.h.
///
-unsigned Function::getIntrinsicID() const {
- if (getName().size() < 5 || getName()[4] != '.' || getName()[0] != 'l' ||
- getName()[1] != 'l' || getName()[2] != 'v' || getName()[3] != 'm')
+unsigned Function::getIntrinsicID(bool noAssert) 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.'
- assert(getName().size() != 5 && "'llvm.' is an invalid intrinsic name!");
-
- switch (getName()[5]) {
- case 'd':
- if (getName() == "llvm.dbg.stoppoint") return Intrinsic::dbg_stoppoint;
- if (getName() == "llvm.dbg.region.start")return Intrinsic::dbg_region_start;
- if (getName() == "llvm.dbg.region.end") return Intrinsic::dbg_region_end;
- if (getName() == "llvm.dbg.func.start") return Intrinsic::dbg_func_start;
- if (getName() == "llvm.dbg.declare") return Intrinsic::dbg_declare;
- break;
- case 'f':
- if (getName() == "llvm.frameaddress") return Intrinsic::frameaddress;
- break;
- case 'g':
- if (getName() == "llvm.gcwrite") return Intrinsic::gcwrite;
- if (getName() == "llvm.gcread") return Intrinsic::gcread;
- if (getName() == "llvm.gcroot") return Intrinsic::gcroot;
- break;
- case 'i':
- if (getName() == "llvm.isunordered") return Intrinsic::isunordered;
- break;
- case 'l':
- if (getName() == "llvm.longjmp") return Intrinsic::longjmp;
- break;
- case 'm':
- if (getName() == "llvm.memcpy") return Intrinsic::memcpy;
- if (getName() == "llvm.memmove") return Intrinsic::memmove;
- if (getName() == "llvm.memset") return Intrinsic::memset;
- break;
- case 'r':
- if (getName() == "llvm.returnaddress") return Intrinsic::returnaddress;
- if (getName() == "llvm.readport") return Intrinsic::readport;
- if (getName() == "llvm.readio") return Intrinsic::readio;
- break;
- case 's':
- if (getName() == "llvm.setjmp") return Intrinsic::setjmp;
- if (getName() == "llvm.sigsetjmp") return Intrinsic::sigsetjmp;
- if (getName() == "llvm.siglongjmp") return Intrinsic::siglongjmp;
- break;
- case 'v':
- if (getName() == "llvm.va_copy") return Intrinsic::vacopy;
- if (getName() == "llvm.va_end") return Intrinsic::vaend;
- if (getName() == "llvm.va_start") return Intrinsic::vastart;
- case 'w':
- if (getName() == "llvm.writeport") return Intrinsic::writeport;
- if (getName() == "llvm.writeio") return Intrinsic::writeio;
- break;
- }
- // The "llvm." namespace is reserved!
- assert(0 && "Unknown LLVM intrinsic function!");
+ assert((Len != 5 || noAssert) && "'llvm.' is an invalid intrinsic name!");
+
+#define GET_FUNCTION_RECOGNIZER
+#include "llvm/Intrinsics.gen"
+#undef GET_FUNCTION_RECOGNIZER
+ assert(noAssert && "Invalid LLVM intrinsic name");
return 0;
}
-Value *IntrinsicInst::StripPointerCasts(Value *Ptr) {
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) {
- if (CE->getOpcode() == Instruction::Cast) {
- if (isa<PointerType>(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));
+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()) +
+ MVT::getMVT(PTyp->getElementType()).getMVTString();
}
- return Ptr;
+ else if (Tys[i])
+ Result += "." + MVT::getMVT(Tys[i]).getMVTString();
}
+ return Result;
+}
- if (CastInst *CI = dyn_cast<CastInst>(Ptr)) {
- if (isa<PointerType>(CI->getOperand(0)->getType()))
- return StripPointerCasts(CI->getOperand(0));
- } else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr)) {
- for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i)
- if (!isa<Constant>(GEP->getOperand(i)) ||
- !cast<Constant>(GEP->getOperand(i))->isNullValue())
- return Ptr;
- return StripPointerCasts(GEP->getOperand(0));
- }
- return Ptr;
+const FunctionType *Intrinsic::getType(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);
+}
+
+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<Function>(M->getOrInsertFunction(getName(id, Tys, numTys),
+ getType(id, Tys, numTys)));
}
// vim: sw=2 ai
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