//
// 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/IntrinsicInst.h"
+#include "llvm/ParameterAttributes.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;
// 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) {
+ : Value(Ty, Value::ArgumentVal) {
Parent = 0;
// Make sure that we get added to a function
if (Par)
Par->getArgumentList().push_back(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;
+ return getParent()->paramHasAttr(getArgNo()+1, ParamAttr::StructRet);
+}
+
+
+
+
+//===----------------------------------------------------------------------===//
+// 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);
+}
+
+/// @brief Determine whether the function has the given attribute.
+bool Function::paramHasAttr(uint16_t i, unsigned attr) const {
+ return ParamAttrs && ParamAttrs->paramHasAttr(i, (ParameterAttributes)attr);
+}
+
+/// @brief Determine if the function cannot return.
+bool Function::doesNotReturn() const {
+ return paramHasAttr(0, ParamAttr::NoReturn);
+}
+
+/// @brief Determine if the function cannot unwind.
+bool Function::doesNotThrow() const {
+ return paramHasAttr(0, ParamAttr::NoUnwind);
+}
+
+/// @brief Determine if the function does not access memory.
+bool Function::doesNotAccessMemory() const {
+ return paramHasAttr(0, ParamAttr::ReadNone);
+}
+
+/// @brief Determine if the function does not access or only reads memory.
+bool Function::onlyReadsMemory() const {
+ return doesNotAccessMemory() || paramHasAttr(0, ParamAttr::ReadOnly);
+}
+
+/// @brief Determine if the function returns a structure.
+bool Function::isStructReturn() const {
+ return paramHasAttr(1, ParamAttr::StructRet);
+}
+
//===----------------------------------------------------------------------===//
// 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) {
- CallingConvention = 0;
- BasicBlocks.setItemParent(this);
- BasicBlocks.setParent(this);
- ArgumentList.setItemParent(this);
- ArgumentList.setParent(this);
+ : GlobalValue(PointerType::getUnqual(Ty),
+ Value::FunctionVal, 0, 0, Linkage, name),
+ ParamAttrs(0) {
SymTab = new ValueSymbolTable();
assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy)
&& "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);
// Delete all of the method arguments and unlink from symbol table...
ArgumentList.clear();
- ArgumentList.setParent(0);
delete SymTab;
+
+ // Drop our reference to the parameter attributes, if any.
+ if (ParamAttrs)
+ ParamAttrs->dropRef();
+
+ // Remove the function from the on-the-side collector table.
+ clearCollector();
+}
+
+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());
-}
-
-bool Function::isVarArg() const {
- return getFunctionType()->isVarArg();
-}
+void Function::setParamAttrs(const ParamAttrsList *attrs) {
+ // Avoid deleting the ParamAttrsList if they are setting the
+ // attributes to the same list.
+ if (ParamAttrs == attrs)
+ return;
-const Type *Function::getReturnType() const {
- return getFunctionType()->getReturnType();
-}
+ // Drop reference on the old ParamAttrsList
+ if (ParamAttrs)
+ ParamAttrs->dropRef();
-void Function::removeFromParent() {
- getParent()->getFunctionList().remove(this);
-}
+ // Add reference to the new ParamAttrsList
+ if (attrs)
+ attrs->addRef();
-void Function::eraseFromParent() {
- getParent()->getFunctionList().erase(this);
+ // Set the new ParamAttrsList.
+ ParamAttrs = attrs;
}
// dropAllReferences() - This function causes all the subinstructions to "let
BasicBlocks.clear(); // Delete all basic blocks...
}
+// 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 {
- const std::string& Name = this->getName();
- if (Name.size() < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l'
+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(Name.size() != 5 && "'llvm.' is an invalid intrinsic name!");
+ 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;
}
-const char *Intrinsic::getName(ID id) {
+std::string Intrinsic::getName(ID id, const Type **Tys, unsigned numTys) {
assert(id < num_intrinsics && "Invalid intrinsic ID!");
const char * const Table[] = {
"not_intrinsic",
#include "llvm/Intrinsics.gen"
#undef GET_INTRINSIC_NAME_TABLE
};
- return Table[id];
+ 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;
+}
+
+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);
+}
+
+const ParamAttrsList *Intrinsic::getParamAttrs(ID id) {
+ ParamAttrsVector Attrs;
+ uint16_t Attr = ParamAttr::None;
+
+#define GET_INTRINSIC_ATTRIBUTES
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_ATTRIBUTES
+
+ // Intrinsics cannot throw exceptions.
+ Attr |= ParamAttr::NoUnwind;
+
+ Attrs.push_back(ParamAttrsWithIndex::get(0, Attr));
+ return ParamAttrsList::get(Attrs);
+}
+
+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.
+ Function *F =
+ cast<Function>(M->getOrInsertFunction(getName(id, Tys, numTys),
+ getType(id, Tys, numTys)));
+ F->setParamAttrs(getParamAttrs(id));
+ return F;
}
Value *IntrinsicInst::StripPointerCasts(Value *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));
+ if (GEP->hasAllZeroIndices())
+ return StripPointerCasts(GEP->getOperand(0));
}
return Ptr;
}
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