//===-- 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/Constant.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/iOther.h"
-#include "llvm/Intrinsics.h"
-#include "Support/LeakDetector.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>::createNode() {
- 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>::createNode() {
- 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);
}
-static bool removeDeadConstantUsers(Constant *C) {
- while (!C->use_empty()) {
- if (Constant *CU = dyn_cast<Constant>(C->use_back())) {
- if (!removeDeadConstantUsers(CU))
- return false; // Constant wasn't dead.
- } else {
- return false; // Nonconstant user of the global.
- }
- }
+/// 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;
- C->destroyConstant();
- return true;
+ 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);
+}
-/// removeDeadConstantUsers - If there are any dead constant users dangling
-/// off of this global value, remove them. This method is useful for clients
-/// that want to check to see if a global is unused, but don't want to deal
-/// with potentially dead constants hanging off of the globals.
-///
-/// This function returns true if the global value is now dead. If all
-/// users of this global are not dead, this method may return false and
-/// leave some of them around.
-bool GlobalValue::removeDeadConstantUsers() {
- while (!use_empty()) {
- if (Constant *C = dyn_cast<Constant>(use_back())) {
- if (!::removeDeadConstantUsers(C))
- return false; // Constant wasn't dead.
- } else {
- return false; // Nonconstant user of the global.
- }
- }
- return true;
+/// 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()->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));
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// 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, 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 collector table.
+ clearCollector();
}
-// 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());
-}
-
-const Type *Function::getReturnType() const {
- return getFunctionType()->getReturnType();
-}
-
// 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
+// valid on an object that has "dropped all references", except operator
// delete.
//
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<const Function*,PooledStringPtr> *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<const Function*,PooledStringPtr>();
+ (*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
/// 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!");
-
- // a table of all Alpha intrinsic functions
- struct {
- std::string name; // The name of the intrinsic
- unsigned id; // Its ID number
- } alpha_intrinsics[] = {
- { "llvm.alpha.ctlz", Intrinsic::alpha_ctlz },
- { "llvm.alpha.cttz", Intrinsic::alpha_cttz },
- { "llvm.alpha.ctpop", Intrinsic::alpha_ctpop },
- { "llvm.alpha.umulh", Intrinsic::alpha_umulh },
- { "llvm.alpha.vecop", Intrinsic::alpha_vecop },
- { "llvm.alpha.pup", Intrinsic::alpha_pup },
- { "llvm.alpha.bytezap", Intrinsic::alpha_bytezap },
- { "llvm.alpha.bytemanip", Intrinsic::alpha_bytemanip },
- { "llvm.alpha.dfp_bop", Intrinsic::alpha_dfpbop },
- { "llvm.alpha.dfp_uop", Intrinsic::alpha_dfpuop },
- { "llvm.alpha.unordered", Intrinsic::alpha_unordered },
- { "llvm.alpha.uqtodfp", Intrinsic::alpha_uqtodfp },
- { "llvm.alpha.uqtosfp", Intrinsic::alpha_uqtosfp },
- { "llvm.alpha.dfptosq", Intrinsic::alpha_dfptosq },
- { "llvm.alpha.sfptosq", Intrinsic::alpha_sfptosq },
- };
- const unsigned num_alpha_intrinsics =
- sizeof(alpha_intrinsics) / sizeof(*alpha_intrinsics);
-
- switch (getName()[5]) {
- case 'a':
- if (getName().size() > 11 &&
- std::string(getName().begin()+4, getName().begin()+11) == ".alpha.")
- for (unsigned i = 0; i < num_alpha_intrinsics; ++i)
- if (getName() == alpha_intrinsics[i].name)
- return alpha_intrinsics[i].id;
- break;
- 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;
}
+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 (Tys[i])
+ Result += "." + MVT::getValueTypeString(MVT::getValueType(Tys[i]));
+ return Result;
+}
-//===----------------------------------------------------------------------===//
-// GlobalVariable Implementation
-//===----------------------------------------------------------------------===//
+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
-GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
- Constant *Initializer,
- const std::string &Name, Module *ParentModule)
- : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, Link, Name),
- isConstantGlobal(constant) {
- if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
+ return FunctionType::get(ResultTy, ArgTys, IsVarArg);
+}
- LeakDetector::addGarbageObject(this);
+PAListPtr Intrinsic::getParamAttrs(ID id) {
+ ParameterAttributes Attr = ParamAttr::None;
- if (ParentModule)
- ParentModule->getGlobalList().push_back(this);
-}
+#define GET_INTRINSIC_ATTRIBUTES
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_ATTRIBUTES
-void GlobalVariable::setParent(Module *parent) {
- if (getParent())
- LeakDetector::addGarbageObject(this);
- Parent = parent;
- if (getParent())
- LeakDetector::removeGarbageObject(this);
+ // Intrinsics cannot throw exceptions.
+ Attr |= ParamAttr::NoUnwind;
+
+ ParamAttrsWithIndex PAWI = ParamAttrsWithIndex::get(0, Attr);
+ return PAListPtr::get(&PAWI, 1);
}
-// 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 && hasName()) P->getSymbolTable().insert(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(id, Tys, numTys)));
}
+
+// vim: sw=2 ai
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