//
// 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/IntrinsicInst.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Support/LeakDetector.h"
-#include "llvm/Support/ManagedStatic.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);
}
-//===----------------------------------------------------------------------===//
-// ParamAttrsList Implementation
-//===----------------------------------------------------------------------===//
+/// 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;
-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 += "zeroext ";
- if (Attrs & ParamAttr::SExt)
- Result += "signext ";
- if (Attrs & ParamAttr::NoReturn)
- Result += "noreturn ";
- if (Attrs & ParamAttr::NoUnwind)
- Result += "nounwind ";
- if (Attrs & ParamAttr::InReg)
- Result += "inreg ";
- if (Attrs & ParamAttr::NoAlias)
- Result += "noalias ";
- if (Attrs & ParamAttr::StructRet)
- Result += "sret ";
- if (Attrs & ParamAttr::ByVal)
- Result += "byval ";
- if (Attrs & ParamAttr::Nest)
- Result += "nest ";
- if (Attrs & ParamAttr::ReadNone)
- Result += "readnone ";
- if (Attrs & ParamAttr::ReadOnly)
- Result += "readonly ";
- return Result;
+ return ArgIdx;
}
-/// onlyInformative - Returns whether only informative attributes are set.
-static inline bool onlyInformative(uint16_t attrs) {
- return !(attrs & ~ParamAttr::Informative);
-}
-
-bool
-ParamAttrsList::areCompatible(const ParamAttrsList *A, const ParamAttrsList *B){
- if (A == B)
- return true;
- unsigned ASize = A ? A->size() : 0;
- unsigned BSize = B ? B->size() : 0;
- unsigned AIndex = 0;
- unsigned BIndex = 0;
-
- while (AIndex < ASize && BIndex < BSize) {
- uint16_t AIdx = A->getParamIndex(AIndex);
- uint16_t BIdx = B->getParamIndex(BIndex);
- uint16_t AAttrs = A->getParamAttrsAtIndex(AIndex);
- uint16_t BAttrs = B->getParamAttrsAtIndex(AIndex);
-
- if (AIdx < BIdx) {
- if (!onlyInformative(AAttrs))
- return false;
- ++AIndex;
- } else if (BIdx < AIdx) {
- if (!onlyInformative(BAttrs))
- return false;
- ++BIndex;
- } else {
- if (!onlyInformative(AAttrs ^ BAttrs))
- return false;
- ++AIndex;
- ++BIndex;
- }
- }
- for (; AIndex < ASize; ++AIndex)
- if (!onlyInformative(A->getParamAttrsAtIndex(AIndex)))
- return false;
- for (; BIndex < BSize; ++BIndex)
- if (!onlyInformative(B->getParamAttrsAtIndex(AIndex)))
- return false;
- return true;
-}
-
-void
-ParamAttrsList::Profile(FoldingSetNodeID &ID) const {
- for (unsigned i = 0; i < attrs.size(); ++i) {
- uint32_t val = uint32_t(attrs[i].attrs) << 16 | attrs[i].index;
- ID.AddInteger(val);
- }
+/// 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);
}
-static ManagedStatic<FoldingSet<ParamAttrsList> > ParamAttrsLists;
+/// 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);
+}
-const ParamAttrsList *
-ParamAttrsList::get(const ParamAttrsVector &attrVec) {
- // If there are no attributes then return a null ParamAttrsList pointer.
- if (attrVec.empty())
- return 0;
+/// 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);
+}
-#ifndef NDEBUG
- for (unsigned i = 0, e = attrVec.size(); i < e; ++i) {
- assert(attrVec[i].attrs != ParamAttr::None
- && "Pointless parameter attribute!");
- assert((!i || attrVec[i-1].index < attrVec[i].index)
- && "Misordered ParamAttrsList!");
- }
-#endif
-
- // Otherwise, build a key to look up the existing attributes.
- ParamAttrsList key(attrVec);
- FoldingSetNodeID ID;
- key.Profile(ID);
- void *InsertPos;
- ParamAttrsList* PAL = ParamAttrsLists->FindNodeOrInsertPos(ID, InsertPos);
-
- // If we didn't find any existing attributes of the same shape then
- // create a new one and insert it.
- if (!PAL) {
- PAL = new ParamAttrsList(attrVec);
- ParamAttrsLists->InsertNode(PAL, InsertPos);
- }
+/// 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));
+}
- // Return the ParamAttrsList that we found or created.
- return PAL;
-}
-
-const ParamAttrsList *
-ParamAttrsList::getModified(const ParamAttrsList *PAL,
- const ParamAttrsVector &modVec) {
- if (modVec.empty())
- return PAL;
-
-#ifndef NDEBUG
- for (unsigned i = 0, e = modVec.size(); i < e; ++i)
- assert((!i || modVec[i-1].index < modVec[i].index)
- && "Misordered ParamAttrsList!");
-#endif
-
- if (!PAL) {
- // Strip any instances of ParamAttr::None from modVec before calling 'get'.
- ParamAttrsVector newVec;
- for (unsigned i = 0, e = modVec.size(); i < e; ++i)
- if (modVec[i].attrs != ParamAttr::None)
- newVec.push_back(modVec[i]);
- return get(newVec);
- }
- const ParamAttrsVector &oldVec = PAL->attrs;
-
- ParamAttrsVector newVec;
- unsigned oldI = 0;
- unsigned modI = 0;
- unsigned oldE = oldVec.size();
- unsigned modE = modVec.size();
-
- while (oldI < oldE && modI < modE) {
- uint16_t oldIndex = oldVec[oldI].index;
- uint16_t modIndex = modVec[modI].index;
-
- if (oldIndex < modIndex) {
- newVec.push_back(oldVec[oldI]);
- ++oldI;
- } else if (modIndex < oldIndex) {
- if (modVec[modI].attrs != ParamAttr::None)
- newVec.push_back(modVec[modI]);
- ++modI;
- } else {
- // Same index - overwrite or delete existing attributes.
- if (modVec[modI].attrs != ParamAttr::None)
- newVec.push_back(modVec[modI]);
- ++oldI;
- ++modI;
- }
- }
- for (; oldI < oldE; ++oldI)
- newVec.push_back(oldVec[oldI]);
- for (; modI < modE; ++modI)
- if (modVec[modI].attrs != ParamAttr::None)
- newVec.push_back(modVec[modI]);
+//===----------------------------------------------------------------------===//
+// Helper Methods in Function
+//===----------------------------------------------------------------------===//
+
+const FunctionType *Function::getFunctionType() const {
+ return cast<FunctionType>(getType()->getElementType());
+}
+
+bool Function::isVarArg() const {
+ return getFunctionType()->isVarArg();
+}
- return get(newVec);
+const Type *Function::getReturnType() const {
+ return getFunctionType()->getReturnType();
+}
+
+void Function::removeFromParent() {
+ getParent()->getFunctionList().remove(this);
}
-ParamAttrsList::~ParamAttrsList() {
- ParamAttrsLists->RemoveNode(this);
+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) {
+ : 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!");
// If the function has arguments, mark them as lazily built.
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() {
ArgumentList.clear();
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 {
LeakDetector::removeGarbageObject(this);
}
-void Function::setParamAttrs(const ParamAttrsList *attrs) {
- // Avoid deleting the ParamAttrsList if they are setting the
- // attributes to the same list.
- if (ParamAttrs == attrs)
- return;
-
- // Drop reference on the old ParamAttrsList
- if (ParamAttrs)
- ParamAttrs->dropRef();
-
- // Add reference to the new ParamAttrsList
- if (attrs)
- attrs->addRef();
+// 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...
+}
- // Set the new ParamAttrsList.
- ParamAttrs = attrs;
+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);
}
-const FunctionType *Function::getFunctionType() const {
- return cast<FunctionType>(getType()->getElementType());
+void Function::addParamAttr(unsigned i, ParameterAttributes attr) {
+ PAListPtr PAL = getParamAttrs();
+ PAL = PAL.addAttr(i, attr);
+ setParamAttrs(PAL);
}
-bool Function::isVarArg() const {
- return getFunctionType()->isVarArg();
+// 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 Type *Function::getReturnType() const {
- return getFunctionType()->getReturnType();
+const char *Function::getCollector() const {
+ assert(hasCollector() && "Function has no collector");
+ return *(*CollectorNames)[this];
}
-void Function::removeFromParent() {
- getParent()->getFunctionList().remove(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::eraseFromParent() {
- getParent()->getFunctionList().erase(this);
+void Function::clearCollector() {
+ if (CollectorNames) {
+ CollectorNames->erase(this);
+ if (CollectorNames->empty()) {
+ delete CollectorNames;
+ CollectorNames = 0;
+ if (CollectorNamePool->empty()) {
+ delete CollectorNamePool;
+ CollectorNamePool = 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->hasCollector())
+ setCollector(SrcF->getCollector());
}
/// getIntrinsicID - This method returns the ID number of the specified
std::string Result(Table[id]);
for (unsigned i = 0; i < numTys; ++i)
if (Tys[i])
- Result += "." + MVT::getValueTypeString(MVT::getValueType(Tys[i]));
+ Result += "." + MVT::getMVT(Tys[i]).getMVTString();
return Result;
}
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)) {
- if (GEP->hasAllZeroIndices())
- 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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