//
// 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.
//
//===----------------------------------------------------------------------===//
//
#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<BasicBlock>::createSentinel() {
- BasicBlock *Ret = new BasicBlock();
+ BasicBlock *Ret = BasicBlock::Create();
// This should not be garbage monitored.
LeakDetector::removeGarbageObject(Ret);
return Ret;
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()->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<FunctionType>(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);
}
//===----------------------------------------------------------------------===//
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<StructType>(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() {
// 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<FunctionType>(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<Function*>(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
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
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<const Type*> ArgTys;
bool IsVarArg = false;
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)));
-}
-
-Value *IntrinsicInst::StripPointerCasts(Value *Ptr) {
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) {
- if (CE->getOpcode() == Instruction::BitCast) {
- 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));
- }
- return Ptr;
- }
-
- if (BitCastInst *CI = dyn_cast<BitCastInst>(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;
+ // 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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