-//===-- Attribute.cpp - Implement AttributesList -------------------------===//
+//===-- Attributes.cpp - Implement AttributesList -------------------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file implements the Attribute, AttributeImpl, AttrBuilder,
+// \file
+// \brief This file implements the Attribute, AttributeImpl, AttrBuilder,
// AttributeSetImpl, and AttributeSet classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Attributes.h"
#include "AttributeImpl.h"
#include "LLVMContextImpl.h"
-#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Atomic.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
using namespace llvm;
//===----------------------------------------------------------------------===//
-// Attribute Implementation
+// Attribute Construction Methods
//===----------------------------------------------------------------------===//
-Attribute Attribute::get(LLVMContext &Context, ArrayRef<AttrKind> Vals) {
+Attribute Attribute::get(LLVMContext &Context, AttrKind Kind) {
AttrBuilder B;
- for (ArrayRef<AttrKind>::iterator I = Vals.begin(), E = Vals.end();
- I != E; ++I)
- B.addAttribute(*I);
- return Attribute::get(Context, B);
+ return Attribute::get(Context, B.addAttribute(Kind));
}
Attribute Attribute::get(LLVMContext &Context, AttrBuilder &B) {
// Otherwise, build a key to look up the existing attributes.
LLVMContextImpl *pImpl = Context.pImpl;
FoldingSetNodeID ID;
- // FIXME: Don't look up ConstantInts here.
- ID.AddPointer(ConstantInt::get(Type::getInt64Ty(Context), B.getBitMask()));
+ ConstantInt *CI = ConstantInt::get(Type::getInt64Ty(Context), B.Raw());
+ ID.AddPointer(CI);
void *InsertPoint;
AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
if (!PA) {
// If we didn't find any existing attributes of the same shape then create a
// new one and insert it.
- PA = new AttributeImpl(Context, B.getBitMask());
+ PA = new AttributeImpl(Context, CI);
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
}
return Attribute(PA);
}
+Attribute Attribute::getWithAlignment(LLVMContext &Context, uint64_t Align) {
+ AttrBuilder B;
+ return get(Context, B.addAlignmentAttr(Align));
+}
+
+Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
+ uint64_t Align) {
+ AttrBuilder B;
+ return get(Context, B.addStackAlignmentAttr(Align));
+}
+
+//===----------------------------------------------------------------------===//
+// Attribute Accessor Methods
+//===----------------------------------------------------------------------===//
+
bool Attribute::hasAttribute(AttrKind Val) const {
return pImpl && pImpl->hasAttribute(Val);
}
unsigned Attribute::getAlignment() const {
if (!hasAttribute(Attribute::Alignment))
return 0;
- return 1U << ((pImpl->getAlignment() >> 16) - 1);
-}
-
-void Attribute::setAlignment(unsigned Align) {
- assert(hasAttribute(Attribute::Alignment) &&
- "Trying to set the alignment on a non-alignment attribute!");
- pImpl->setAlignment(Align);
+ return pImpl->getAlignment();
}
/// This returns the stack alignment field of an attribute as a byte alignment
unsigned Attribute::getStackAlignment() const {
if (!hasAttribute(Attribute::StackAlignment))
return 0;
- return 1U << ((pImpl->getStackAlignment() >> 26) - 1);
-}
-
-void Attribute::setStackAlignment(unsigned Align) {
- assert(hasAttribute(Attribute::StackAlignment) &&
- "Trying to set the stack alignment on a non-alignment attribute!");
- pImpl->setStackAlignment(Align);
-}
-
-bool Attribute::operator==(AttrKind K) const {
- return pImpl && *pImpl == K;
-}
-bool Attribute::operator!=(AttrKind K) const {
- return !(*this == K);
-}
-
-uint64_t Attribute::getBitMask() const {
- return pImpl ? pImpl->getBitMask() : 0;
-}
-
-Attribute Attribute::typeIncompatible(Type *Ty) {
- AttrBuilder Incompatible;
-
- if (!Ty->isIntegerTy())
- // Attribute that only apply to integers.
- Incompatible.addAttribute(Attribute::SExt)
- .addAttribute(Attribute::ZExt);
-
- if (!Ty->isPointerTy())
- // Attribute that only apply to pointers.
- Incompatible.addAttribute(Attribute::ByVal)
- .addAttribute(Attribute::Nest)
- .addAttribute(Attribute::NoAlias)
- .addAttribute(Attribute::NoCapture)
- .addAttribute(Attribute::StructRet);
-
- return Attribute::get(Ty->getContext(), Incompatible);
-}
-
-/// encodeLLVMAttributesForBitcode - This returns an integer containing an
-/// encoding of all the LLVM attributes found in the given attribute bitset.
-/// Any change to this encoding is a breaking change to bitcode compatibility.
-uint64_t Attribute::encodeLLVMAttributesForBitcode(Attribute Attrs) {
- // FIXME: It doesn't make sense to store the alignment information as an
- // expanded out value, we should store it as a log2 value. However, we can't
- // just change that here without breaking bitcode compatibility. If this ever
- // becomes a problem in practice, we should introduce new tag numbers in the
- // bitcode file and have those tags use a more efficiently encoded alignment
- // field.
-
- // Store the alignment in the bitcode as a 16-bit raw value instead of a 5-bit
- // log2 encoded value. Shift the bits above the alignment up by 11 bits.
- uint64_t EncodedAttrs = Attrs.getBitMask() & 0xffff;
- if (Attrs.hasAttribute(Attribute::Alignment))
- EncodedAttrs |= Attrs.getAlignment() << 16;
- EncodedAttrs |= (Attrs.getBitMask() & (0xffffULL << 21)) << 11;
- return EncodedAttrs;
-}
-
-/// decodeLLVMAttributesForBitcode - This returns an attribute bitset containing
-/// the LLVM attributes that have been decoded from the given integer. This
-/// function must stay in sync with 'encodeLLVMAttributesForBitcode'.
-Attribute Attribute::decodeLLVMAttributesForBitcode(LLVMContext &C,
- uint64_t EncodedAttrs) {
- // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
- // the bits above 31 down by 11 bits.
- unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
- assert((!Alignment || isPowerOf2_32(Alignment)) &&
- "Alignment must be a power of two.");
-
- AttrBuilder B(EncodedAttrs & 0xffff);
- if (Alignment)
- B.addAlignmentAttr(Alignment);
- B.addRawValue((EncodedAttrs & (0xffffULL << 32)) >> 11);
- return Attribute::get(C, B);
+ return pImpl->getStackAlignment();
}
std::string Attribute::getAsString() const {
Result += "ssp ";
if (hasAttribute(Attribute::StackProtectReq))
Result += "sspreq ";
+ if (hasAttribute(Attribute::StackProtectStrong))
+ Result += "sspstrong ";
if (hasAttribute(Attribute::NoRedZone))
Result += "noredzone ";
if (hasAttribute(Attribute::NoImplicitFloat))
return Result;
}
-//===----------------------------------------------------------------------===//
-// AttrBuilder Method Implementations
-//===----------------------------------------------------------------------===//
-
-AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
- : Alignment(0), StackAlignment(0) {
- AttributeSetImpl *pImpl = AS.AttrList;
- if (!pImpl) return;
-
- ArrayRef<AttributeWithIndex> AttrList = pImpl->getAttributes();
- const AttributeWithIndex *AWI = 0;
- for (unsigned I = 0, E = AttrList.size(); I != E; ++I)
- if (AttrList[I].Index == Idx) {
- AWI = &AttrList[I];
- break;
- }
-
- assert(AWI && "Cannot find index in attribute set!");
-
- /// FIXME: This will be modified in the future. Basically, the
- /// AttributeWithIndex class will contain the
-
-}
-
-void AttrBuilder::clear() {
- Attrs.clear();
- Alignment = StackAlignment = 0;
-}
-
-AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
- Attrs.insert(Val);
- return *this;
-}
-
-AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
- Attrs.erase(Val);
- if (Val == Attribute::Alignment)
- Alignment = 0;
- else if (Val == Attribute::StackAlignment)
- StackAlignment = 0;
-
- return *this;
-}
-
-AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
- if (Align == 0) return *this;
-
- assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
- assert(Align <= 0x40000000 && "Alignment too large.");
-
- Attrs.insert(Attribute::Alignment);
- Alignment = Align;
- return *this;
-}
-
-AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
- // Default alignment, allow the target to define how to align it.
- if (Align == 0) return *this;
-
- assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
- assert(Align <= 0x100 && "Alignment too large.");
-
- Attrs.insert(Attribute::StackAlignment);
- StackAlignment = Align;
- return *this;
-}
-
-AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
- for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
- I = Attribute::AttrKind(I + 1)) {
- if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
- Attrs.insert(I);
-
- if (I == Attribute::Alignment)
- Alignment = 1ULL << ((A >> 16) - 1);
- else if (I == Attribute::StackAlignment)
- StackAlignment = 1ULL << ((A >> 26)-1);
- }
- }
-
- return *this;
-}
-
-AttrBuilder &AttrBuilder::addAttributes(const Attribute &A) {
- uint64_t Mask = A.getBitMask();
-
- for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
- I = Attribute::AttrKind(I + 1)) {
- if (uint64_t A = (Mask & AttributeImpl::getAttrMask(I))) {
- Attrs.insert(I);
-
- if (I == Attribute::Alignment)
- Alignment = 1ULL << ((A >> 16) - 1);
- else if (I == Attribute::StackAlignment)
- StackAlignment = 1ULL << ((A >> 26)-1);
- }
- }
-
- return *this;
-}
-
-AttrBuilder &AttrBuilder::removeAttributes(const Attribute &A){
- uint64_t Mask = A.getBitMask();
-
- for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
- I = Attribute::AttrKind(I + 1)) {
- if (Mask & AttributeImpl::getAttrMask(I)) {
- Attrs.erase(I);
-
- if (I == Attribute::Alignment)
- Alignment = 0;
- else if (I == Attribute::StackAlignment)
- StackAlignment = 0;
- }
- }
-
- return *this;
-}
-
-bool AttrBuilder::contains(Attribute::AttrKind A) const {
- return Attrs.count(A);
-}
-
-bool AttrBuilder::hasAttributes() const {
- return !Attrs.empty();
-}
-
-bool AttrBuilder::hasAttributes(const Attribute &A) const {
- return getBitMask() & A.getBitMask();
+bool Attribute::operator==(AttrKind K) const {
+ return pImpl && *pImpl == K;
}
-
-bool AttrBuilder::hasAlignmentAttr() const {
- return Alignment != 0;
+bool Attribute::operator!=(AttrKind K) const {
+ return !(*this == K);
}
-uint64_t AttrBuilder::getBitMask() const {
- uint64_t Mask = 0;
-
- for (DenseSet<Attribute::AttrKind>::const_iterator I = Attrs.begin(),
- E = Attrs.end(); I != E; ++I) {
- Attribute::AttrKind Kind = *I;
-
- if (Kind == Attribute::Alignment)
- Mask |= (Log2_32(Alignment) + 1) << 16;
- else if (Kind == Attribute::StackAlignment)
- Mask |= (Log2_32(StackAlignment) + 1) << 26;
- else
- Mask |= AttributeImpl::getAttrMask(Kind);
- }
-
- return Mask;
+bool Attribute::operator<(Attribute A) const {
+ if (!pImpl && !A.pImpl) return false;
+ if (!pImpl) return true;
+ if (!A.pImpl) return false;
+ return *pImpl < *A.pImpl;
}
-bool AttrBuilder::operator==(const AttrBuilder &B) {
- SmallVector<Attribute::AttrKind, 8> This(Attrs.begin(), Attrs.end());
- SmallVector<Attribute::AttrKind, 8> That(B.Attrs.begin(), B.Attrs.end());
- return This == That;
+uint64_t Attribute::Raw() const {
+ return pImpl ? pImpl->Raw() : 0;
}
//===----------------------------------------------------------------------===//
// AttributeImpl Definition
//===----------------------------------------------------------------------===//
-AttributeImpl::AttributeImpl(LLVMContext &C, uint64_t data)
- : Context(C) {
- Data = ConstantInt::get(Type::getInt64Ty(C), data);
-}
AttributeImpl::AttributeImpl(LLVMContext &C, Attribute::AttrKind data)
: Context(C) {
Data = ConstantInt::get(Type::getInt64Ty(C), data);
Data = ConstantDataArray::getString(C, data);
}
+bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
+ return (Raw() & getAttrMask(A)) != 0;
+}
+
+bool AttributeImpl::hasAttributes() const {
+ return Raw() != 0;
+}
+
+uint64_t AttributeImpl::getAlignment() const {
+ uint64_t Mask = Raw() & getAttrMask(Attribute::Alignment);
+ return 1ULL << ((Mask >> 16) - 1);
+}
+
+uint64_t AttributeImpl::getStackAlignment() const {
+ uint64_t Mask = Raw() & getAttrMask(Attribute::StackAlignment);
+ return 1ULL << ((Mask >> 26) - 1);
+}
+
bool AttributeImpl::operator==(Attribute::AttrKind Kind) const {
if (ConstantInt *CI = dyn_cast<ConstantInt>(Data))
return CI->getZExtValue() == Kind;
return CDA->getAsString() == Kind;
return false;
}
+
bool AttributeImpl::operator!=(StringRef Kind) const {
return !(*this == Kind);
}
-uint64_t AttributeImpl::getBitMask() const {
+bool AttributeImpl::operator<(const AttributeImpl &AI) const {
+ if (!Data && !AI.Data) return false;
+ if (!Data && AI.Data) return true;
+ if (Data && !AI.Data) return false;
+
+ ConstantInt *ThisCI = dyn_cast<ConstantInt>(Data);
+ ConstantInt *ThatCI = dyn_cast<ConstantInt>(AI.Data);
+
+ ConstantDataArray *ThisCDA = dyn_cast<ConstantDataArray>(Data);
+ ConstantDataArray *ThatCDA = dyn_cast<ConstantDataArray>(AI.Data);
+
+ if (ThisCI && ThatCI)
+ return ThisCI->getZExtValue() < ThatCI->getZExtValue();
+
+ if (ThisCI && ThatCDA)
+ return true;
+
+ if (ThisCDA && ThatCI)
+ return false;
+
+ return ThisCDA->getAsString() < ThatCDA->getAsString();
+}
+
+uint64_t AttributeImpl::Raw() const {
// FIXME: Remove this.
return cast<ConstantInt>(Data)->getZExtValue();
}
uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
+ // FIXME: Remove this.
switch (Val) {
case Attribute::EndAttrKinds:
case Attribute::AttrKindEmptyKey:
case Attribute::AddressSafety: return 1ULL << 32;
case Attribute::MinSize: return 1ULL << 33;
case Attribute::NoDuplicate: return 1ULL << 34;
+ case Attribute::StackProtectStrong: return 1ULL << 35;
}
llvm_unreachable("Unsupported attribute type");
}
-bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
- return (getBitMask() & getAttrMask(A)) != 0;
-}
+//===----------------------------------------------------------------------===//
+// AttributeSetNode Definition
+//===----------------------------------------------------------------------===//
-bool AttributeImpl::hasAttributes() const {
- return getBitMask() != 0;
-}
+AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
+ ArrayRef<Attribute> Attrs) {
+ if (Attrs.empty())
+ return 0;
-uint64_t AttributeImpl::getAlignment() const {
- return getBitMask() & getAttrMask(Attribute::Alignment);
-}
+ // Otherwise, build a key to look up the existing attributes.
+ LLVMContextImpl *pImpl = C.pImpl;
+ FoldingSetNodeID ID;
-void AttributeImpl::setAlignment(unsigned Align) {
- Vals.push_back(ConstantInt::get(Type::getInt64Ty(Context), Align));
-}
+ SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
+ std::sort(SortedAttrs.begin(), SortedAttrs.end());
-uint64_t AttributeImpl::getStackAlignment() const {
- return getBitMask() & getAttrMask(Attribute::StackAlignment);
-}
+ for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
+ E = SortedAttrs.end(); I != E; ++I)
+ I->Profile(ID);
+
+ void *InsertPoint;
+ AttributeSetNode *PA =
+ pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
+
+ // If we didn't find any existing attributes of the same shape then create a
+ // new one and insert it.
+ if (!PA) {
+ PA = new AttributeSetNode(SortedAttrs);
+ pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
+ }
-void AttributeImpl::setStackAlignment(unsigned Align) {
- Vals.push_back(ConstantInt::get(Type::getInt64Ty(Context), Align));
+ // Return the AttributesListNode that we found or created.
+ return PA;
}
//===----------------------------------------------------------------------===//
// AttributeSetImpl Definition
//===----------------------------------------------------------------------===//
-AttributeSet AttributeSet::get(LLVMContext &C,
- ArrayRef<AttributeWithIndex> Attrs) {
- // If there are no attributes then return a null AttributesList pointer.
- if (Attrs.empty())
- return AttributeSet();
+uint64_t AttributeSetImpl::Raw(uint64_t Index) const {
+ for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
+ if (getSlotIndex(I) != Index) continue;
+ const AttributeSetNode *ASN = AttrNodes[I].second;
+ AttrBuilder B;
-#ifndef NDEBUG
- for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
- assert(Attrs[i].Attrs.hasAttributes() &&
- "Pointless attribute!");
- assert((!i || Attrs[i-1].Index < Attrs[i].Index) &&
- "Misordered AttributesList!");
+ for (AttributeSetNode::const_iterator II = ASN->begin(),
+ IE = ASN->end(); II != IE; ++II)
+ B.addAttributes(*II);
+ return B.Raw();
}
-#endif
- // Otherwise, build a key to look up the existing attributes.
+ return 0;
+}
+
+//===----------------------------------------------------------------------===//
+// AttributeSet Construction and Mutation Methods
+//===----------------------------------------------------------------------===//
+
+AttributeSet AttributeSet::getImpl(LLVMContext &C,
+ ArrayRef<std::pair<unsigned,
+ AttributeSetNode*> > Attrs) {
LLVMContextImpl *pImpl = C.pImpl;
FoldingSetNodeID ID;
AttributeSetImpl::Profile(ID, Attrs);
return AttributeSet(PA);
}
-AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
- SmallVector<AttributeWithIndex, 8> Attrs;
- for (AttrBuilder::iterator I = B.begin(), E = B.end(); I != E; ++I) {
- Attribute::AttrKind Kind = *I;
- Attribute A = Attribute::get(C, Kind);
+AttributeSet AttributeSet::get(LLVMContext &C,
+ ArrayRef<std::pair<unsigned, Attribute> > Attrs){
+ // If there are no attributes then return a null AttributesList pointer.
+ if (Attrs.empty())
+ return AttributeSet();
- if (Kind == Attribute::Alignment)
- A.setAlignment(B.getAlignment());
- else if (Kind == Attribute::StackAlignment)
- A.setStackAlignment(B.getStackAlignment());
+#ifndef NDEBUG
+ for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
+ assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
+ "Misordered Attributes list!");
+ assert(Attrs[i].second.hasAttributes() &&
+ "Pointless attribute!");
+ }
+#endif
+
+ // Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
+ // list.
+ SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
+ for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
+ E = Attrs.end(); I != E; ) {
+ unsigned Index = I->first;
+ SmallVector<Attribute, 4> AttrVec;
+ while (I->first == Index && I != E) {
+ AttrVec.push_back(I->second);
+ ++I;
+ }
- Attrs.push_back(AttributeWithIndex::get(Idx, A));
+ AttrPairVec.push_back(std::make_pair(Index,
+ AttributeSetNode::get(C, AttrVec)));
}
+ return getImpl(C, AttrPairVec);
+}
+
+AttributeSet AttributeSet::get(LLVMContext &C,
+ ArrayRef<std::pair<unsigned,
+ AttributeSetNode*> > Attrs) {
+ // If there are no attributes then return a null AttributesList pointer.
+ if (Attrs.empty())
+ return AttributeSet();
+
+ return getImpl(C, Attrs);
+}
+
+AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx, AttrBuilder &B) {
+ if (!B.hasAttributes())
+ return AttributeSet();
+ return get(C, ArrayRef<std::pair<unsigned, Attribute> >(
+ std::make_pair(Idx, Attribute::get(C, B))));
+}
+
+AttributeSet AttributeSet::get(LLVMContext &C, unsigned Idx,
+ ArrayRef<Attribute::AttrKind> Kind) {
+ SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
+ for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
+ E = Kind.end(); I != E; ++I)
+ Attrs.push_back(std::make_pair(Idx, Attribute::get(C, *I)));
return get(C, Attrs);
}
+AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
+ if (Attrs.empty()) return AttributeSet();
+
+ SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
+ for (unsigned I = 0, E = Attrs.size(); I != E; ++I) {
+ AttributeSet AS = Attrs[I];
+ if (!AS.pImpl) continue;
+ AttrNodeVec.append(AS.pImpl->AttrNodes.begin(), AS.pImpl->AttrNodes.end());
+ }
+
+ return getImpl(C, AttrNodeVec);
+}
+
+AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Idx,
+ Attribute::AttrKind Attr) const {
+ return addAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
+}
+
+AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Idx,
+ AttributeSet Attrs) const {
+ if (!pImpl) return Attrs;
+ if (!Attrs.pImpl) return *this;
+
+#ifndef NDEBUG
+ // FIXME it is not obvious how this should work for alignment. For now, say
+ // we can't change a known alignment.
+ unsigned OldAlign = getParamAlignment(Idx);
+ unsigned NewAlign = Attrs.getParamAlignment(Idx);
+ assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
+ "Attempt to change alignment!");
+#endif
+
+ // Add the attribute slots before the one we're trying to add.
+ SmallVector<AttributeSet, 4> AttrSet;
+ uint64_t NumAttrs = pImpl->getNumAttributes();
+ AttributeSet AS;
+ uint64_t LastIndex = 0;
+ for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
+ if (getSlotIndex(I) >= Idx) {
+ if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
+ break;
+ }
+ LastIndex = I + 1;
+ AttrSet.push_back(getSlotAttributes(I));
+ }
+
+ // Now add the attribute into the correct slot. There may already be an
+ // AttributeSet there.
+ AttrBuilder B(AS, Idx);
+
+ for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
+ if (Attrs.getSlotIndex(I) == Idx) {
+ for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
+ IE = Attrs.pImpl->end(I); II != IE; ++II)
+ B.addAttributes(*II);
+ break;
+ }
+
+ AttrSet.push_back(AttributeSet::get(C, Idx, B));
+
+ // Add the remaining attribute slots.
+ for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
+ AttrSet.push_back(getSlotAttributes(I));
+
+ return get(C, AttrSet);
+}
+
+AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Idx,
+ Attribute::AttrKind Attr) const {
+ return removeAttributes(C, Idx, AttributeSet::get(C, Idx, Attr));
+}
+
+AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Idx,
+ AttributeSet Attrs) const {
+ if (!pImpl) return AttributeSet();
+ if (!Attrs.pImpl) return *this;
+
+#ifndef NDEBUG
+ // FIXME it is not obvious how this should work for alignment.
+ // For now, say we can't pass in alignment, which no current use does.
+ assert(!Attrs.hasAttribute(Idx, Attribute::Alignment) &&
+ "Attempt to change alignment!");
+#endif
+
+ // Add the attribute slots before the one we're trying to add.
+ SmallVector<AttributeSet, 4> AttrSet;
+ uint64_t NumAttrs = pImpl->getNumAttributes();
+ AttributeSet AS;
+ uint64_t LastIndex = 0;
+ for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
+ if (getSlotIndex(I) >= Idx) {
+ if (getSlotIndex(I) == Idx) AS = getSlotAttributes(LastIndex++);
+ break;
+ }
+ LastIndex = I + 1;
+ AttrSet.push_back(getSlotAttributes(I));
+ }
+
+ // Now add the attribute into the correct slot. There may already be an
+ // AttributeSet there.
+ AttrBuilder B(AS, Idx);
+
+ for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
+ if (Attrs.getSlotIndex(I) == Idx) {
+ for (AttributeSetImpl::const_iterator II = Attrs.pImpl->begin(I),
+ IE = Attrs.pImpl->end(I); II != IE; ++II)
+ B.removeAttributes(*II);
+ break;
+ }
+
+ AttrSet.push_back(AttributeSet::get(C, Idx, B));
+
+ // Add the remaining attribute slots.
+ for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
+ AttrSet.push_back(getSlotAttributes(I));
+
+ return get(C, AttrSet);
+}
+
//===----------------------------------------------------------------------===//
-// AttributeSet Method Implementations
+// AttributeSet Accessor Methods
//===----------------------------------------------------------------------===//
-const AttributeSet &AttributeSet::operator=(const AttributeSet &RHS) {
- AttrList = RHS.AttrList;
- return *this;
+AttributeSet AttributeSet::getParamAttributes(unsigned Idx) const {
+ return pImpl && hasAttributes(Idx) ?
+ AttributeSet::get(pImpl->getContext(),
+ ArrayRef<std::pair<unsigned, Attribute> >(
+ std::make_pair(Idx, getAttributes(Idx)))) :
+ AttributeSet();
}
-/// getNumSlots - Return the number of slots used in this attribute list.
-/// This is the number of arguments that have an attribute set on them
-/// (including the function itself).
-unsigned AttributeSet::getNumSlots() const {
- return AttrList ? AttrList->getNumAttributes() : 0;
+AttributeSet AttributeSet::getRetAttributes() const {
+ return pImpl && hasAttributes(ReturnIndex) ?
+ AttributeSet::get(pImpl->getContext(),
+ ArrayRef<std::pair<unsigned, Attribute> >(
+ std::make_pair(ReturnIndex,
+ getAttributes(ReturnIndex)))) :
+ AttributeSet();
}
-/// getSlot - Return the AttributeWithIndex at the specified slot. This
-/// holds a number plus a set of attributes.
-const AttributeWithIndex &AttributeSet::getSlot(unsigned Slot) const {
- assert(AttrList && Slot < AttrList->getNumAttributes() &&
- "Slot # out of range!");
- return AttrList->getAttributes()[Slot];
+AttributeSet AttributeSet::getFnAttributes() const {
+ return pImpl && hasAttributes(FunctionIndex) ?
+ AttributeSet::get(pImpl->getContext(),
+ ArrayRef<std::pair<unsigned, Attribute> >(
+ std::make_pair(FunctionIndex,
+ getAttributes(FunctionIndex)))) :
+ AttributeSet();
}
bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
return getAttributes(Index).hasAttributes();
}
-std::string AttributeSet::getAsString(unsigned Index) const {
- return getAttributes(Index).getAsString();
+/// \brief Return true if the specified attribute is set for at least one
+/// parameter or for the return value.
+bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
+ if (pImpl == 0) return false;
+
+ for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
+ for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
+ IE = pImpl->end(I); II != IE; ++II)
+ if (II->hasAttribute(Attr))
+ return true;
+
+ return false;
+}
+
+unsigned AttributeSet::getParamAlignment(unsigned Idx) const {
+ return getAttributes(Idx).getAlignment();
}
unsigned AttributeSet::getStackAlignment(unsigned Index) const {
return getAttributes(Index).getStackAlignment();
}
-uint64_t AttributeSet::getBitMask(unsigned Index) const {
- // FIXME: Remove this.
- return getAttributes(Index).getBitMask();
+std::string AttributeSet::getAsString(unsigned Index) const {
+ return getAttributes(Index).getAsString();
}
-/// getAttributes - The attributes for the specified index are returned.
-/// Attributes for the result are denoted with Idx = 0. Function attributes are
-/// denoted with Idx = ~0.
+/// \brief The attributes for the specified index are returned.
+///
+/// FIXME: This shouldn't return 'Attribute'.
Attribute AttributeSet::getAttributes(unsigned Idx) const {
- if (AttrList == 0) return Attribute();
+ if (pImpl == 0) return Attribute();
- ArrayRef<AttributeWithIndex> Attrs = AttrList->getAttributes();
- for (unsigned i = 0, e = Attrs.size(); i != e && Attrs[i].Index <= Idx; ++i)
- if (Attrs[i].Index == Idx)
- return Attrs[i].Attrs;
+ // Loop through to find the attribute we want.
+ for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
+ if (pImpl->getSlotIndex(I) != Idx) continue;
+
+ AttrBuilder B;
+ for (AttributeSetImpl::const_iterator II = pImpl->begin(I),
+ IE = pImpl->end(I); II != IE; ++II)
+ B.addAttributes(*II);
+ return Attribute::get(pImpl->getContext(), B);
+ }
return Attribute();
}
-/// hasAttrSomewhere - Return true if the specified attribute is set for at
-/// least one parameter or for the return value.
-bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
- if (AttrList == 0) return false;
+//===----------------------------------------------------------------------===//
+// AttributeSet Introspection Methods
+//===----------------------------------------------------------------------===//
- ArrayRef<AttributeWithIndex> Attrs = AttrList->getAttributes();
- for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
- if (Attrs[i].Attrs.hasAttribute(Attr))
- return true;
+/// \brief Return the number of slots used in this attribute list. This is the
+/// number of arguments that have an attribute set on them (including the
+/// function itself).
+unsigned AttributeSet::getNumSlots() const {
+ return pImpl ? pImpl->getNumAttributes() : 0;
+}
- return false;
+uint64_t AttributeSet::getSlotIndex(unsigned Slot) const {
+ assert(pImpl && Slot < pImpl->getNumAttributes() &&
+ "Slot # out of range!");
+ return pImpl->getSlotIndex(Slot);
}
-AttributeSet AttributeSet::addAttr(LLVMContext &C, unsigned Idx,
- Attribute Attrs) const {
- Attribute OldAttrs = getAttributes(Idx);
-#ifndef NDEBUG
- // FIXME it is not obvious how this should work for alignment.
- // For now, say we can't change a known alignment.
- unsigned OldAlign = OldAttrs.getAlignment();
- unsigned NewAlign = Attrs.getAlignment();
- assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
- "Attempt to change alignment!");
-#endif
+AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
+ assert(pImpl && Slot < pImpl->getNumAttributes() &&
+ "Slot # out of range!");
+ return pImpl->getSlotAttributes(Slot);
+}
- AttrBuilder NewAttrs =
- AttrBuilder(OldAttrs).addAttributes(Attrs);
- if (NewAttrs == AttrBuilder(OldAttrs))
- return *this;
-
- SmallVector<AttributeWithIndex, 8> NewAttrList;
- if (AttrList == 0)
- NewAttrList.push_back(AttributeWithIndex::get(Idx, Attrs));
- else {
- ArrayRef<AttributeWithIndex> OldAttrList = AttrList->getAttributes();
- unsigned i = 0, e = OldAttrList.size();
- // Copy attributes for arguments before this one.
- for (; i != e && OldAttrList[i].Index < Idx; ++i)
- NewAttrList.push_back(OldAttrList[i]);
-
- // If there are attributes already at this index, merge them in.
- if (i != e && OldAttrList[i].Index == Idx) {
- Attrs =
- Attribute::get(C, AttrBuilder(Attrs).
- addAttributes(OldAttrList[i].Attrs));
- ++i;
+uint64_t AttributeSet::Raw(unsigned Index) const {
+ // FIXME: Remove this.
+ return pImpl ? pImpl->Raw(Index) : 0;
+}
+
+void AttributeSet::dump() const {
+ dbgs() << "PAL[\n";
+
+ for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
+ uint64_t Index = getSlotIndex(i);
+ dbgs() << " { ";
+ if (Index == ~0U)
+ dbgs() << "~0U";
+ else
+ dbgs() << Index;
+ dbgs() << " => " << getAsString(Index) << " }\n";
+ }
+
+ dbgs() << "]\n";
+}
+
+//===----------------------------------------------------------------------===//
+// AttrBuilder Method Implementations
+//===----------------------------------------------------------------------===//
+
+AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Idx)
+ : Alignment(0), StackAlignment(0) {
+ AttributeSetImpl *pImpl = AS.pImpl;
+ if (!pImpl) return;
+
+ AttrBuilder B;
+
+ for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
+ if (pImpl->getSlotIndex(I) != Idx) continue;
+
+ for (AttributeSetNode::const_iterator II = pImpl->begin(I),
+ IE = pImpl->end(I); II != IE; ++II)
+ B.addAttributes(*II);
+
+ break;
+ }
+
+ if (!B.hasAttributes()) return;
+
+ uint64_t Mask = B.Raw();
+
+ for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
+ I = Attribute::AttrKind(I + 1)) {
+ if (uint64_t A = (Mask & AttributeImpl::getAttrMask(I))) {
+ Attrs.insert(I);
+
+ if (I == Attribute::Alignment)
+ Alignment = 1ULL << ((A >> 16) - 1);
+ else if (I == Attribute::StackAlignment)
+ StackAlignment = 1ULL << ((A >> 26)-1);
}
+ }
+}
- NewAttrList.push_back(AttributeWithIndex::get(Idx, Attrs));
+void AttrBuilder::clear() {
+ Attrs.clear();
+ Alignment = StackAlignment = 0;
+}
+
+AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
+ Attrs.insert(Val);
+ return *this;
+}
+
+AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
+ Attrs.erase(Val);
+ if (Val == Attribute::Alignment)
+ Alignment = 0;
+ else if (Val == Attribute::StackAlignment)
+ StackAlignment = 0;
- // Copy attributes for arguments after this one.
- NewAttrList.insert(NewAttrList.end(),
- OldAttrList.begin()+i, OldAttrList.end());
+ return *this;
+}
+
+AttrBuilder &AttrBuilder::addAttributes(Attribute Attr) {
+ uint64_t Mask = Attr.Raw();
+
+ for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
+ I = Attribute::AttrKind(I + 1))
+ if ((Mask & AttributeImpl::getAttrMask(I)) != 0)
+ Attrs.insert(I);
+
+ if (Attr.getAlignment())
+ Alignment = Attr.getAlignment();
+ if (Attr.getStackAlignment())
+ StackAlignment = Attr.getStackAlignment();
+ return *this;
+}
+
+AttrBuilder &AttrBuilder::removeAttributes(Attribute A) {
+ uint64_t Mask = A.Raw();
+
+ for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
+ I = Attribute::AttrKind(I + 1)) {
+ if (Mask & AttributeImpl::getAttrMask(I)) {
+ Attrs.erase(I);
+
+ if (I == Attribute::Alignment)
+ Alignment = 0;
+ else if (I == Attribute::StackAlignment)
+ StackAlignment = 0;
+ }
}
- return get(C, NewAttrList);
+ return *this;
}
-AttributeSet AttributeSet::removeAttr(LLVMContext &C, unsigned Idx,
- Attribute Attrs) const {
-#ifndef NDEBUG
- // FIXME it is not obvious how this should work for alignment.
- // For now, say we can't pass in alignment, which no current use does.
- assert(!Attrs.hasAttribute(Attribute::Alignment) &&
- "Attempt to exclude alignment!");
-#endif
- if (AttrList == 0) return AttributeSet();
+AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
+ if (Align == 0) return *this;
- Attribute OldAttrs = getAttributes(Idx);
- AttrBuilder NewAttrs =
- AttrBuilder(OldAttrs).removeAttributes(Attrs);
- if (NewAttrs == AttrBuilder(OldAttrs))
- return *this;
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x40000000 && "Alignment too large.");
- SmallVector<AttributeWithIndex, 8> NewAttrList;
- ArrayRef<AttributeWithIndex> OldAttrList = AttrList->getAttributes();
- unsigned i = 0, e = OldAttrList.size();
+ Attrs.insert(Attribute::Alignment);
+ Alignment = Align;
+ return *this;
+}
+
+AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
+ // Default alignment, allow the target to define how to align it.
+ if (Align == 0) return *this;
+
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x100 && "Alignment too large.");
+
+ Attrs.insert(Attribute::StackAlignment);
+ StackAlignment = Align;
+ return *this;
+}
- // Copy attributes for arguments before this one.
- for (; i != e && OldAttrList[i].Index < Idx; ++i)
- NewAttrList.push_back(OldAttrList[i]);
+bool AttrBuilder::contains(Attribute::AttrKind A) const {
+ return Attrs.count(A);
+}
- // If there are attributes already at this index, merge them in.
- assert(OldAttrList[i].Index == Idx && "Attribute isn't set?");
- Attrs = Attribute::get(C, AttrBuilder(OldAttrList[i].Attrs).
- removeAttributes(Attrs));
- ++i;
- if (Attrs.hasAttributes()) // If any attributes left for this param, add them.
- NewAttrList.push_back(AttributeWithIndex::get(Idx, Attrs));
+bool AttrBuilder::hasAttributes() const {
+ return !Attrs.empty();
+}
- // Copy attributes for arguments after this one.
- NewAttrList.insert(NewAttrList.end(),
- OldAttrList.begin()+i, OldAttrList.end());
+bool AttrBuilder::hasAttributes(const Attribute &A) const {
+ return Raw() & A.Raw();
+}
- return get(C, NewAttrList);
+bool AttrBuilder::hasAlignmentAttr() const {
+ return Alignment != 0;
}
-void AttributeSet::dump() const {
- dbgs() << "PAL[ ";
- for (unsigned i = 0; i < getNumSlots(); ++i) {
- const AttributeWithIndex &PAWI = getSlot(i);
- dbgs() << "{ " << PAWI.Index << ", " << PAWI.Attrs.getAsString() << " } ";
+bool AttrBuilder::operator==(const AttrBuilder &B) {
+ SmallVector<Attribute::AttrKind, 8> This(Attrs.begin(), Attrs.end());
+ SmallVector<Attribute::AttrKind, 8> That(B.Attrs.begin(), B.Attrs.end());
+ return This == That;
+}
+
+AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
+ for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
+ I = Attribute::AttrKind(I + 1)) {
+ if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
+ Attrs.insert(I);
+
+ if (I == Attribute::Alignment)
+ Alignment = 1ULL << ((A >> 16) - 1);
+ else if (I == Attribute::StackAlignment)
+ StackAlignment = 1ULL << ((A >> 26)-1);
+ }
}
+
+ return *this;
+}
- dbgs() << "]\n";
+uint64_t AttrBuilder::Raw() const {
+ uint64_t Mask = 0;
+
+ for (DenseSet<Attribute::AttrKind>::const_iterator I = Attrs.begin(),
+ E = Attrs.end(); I != E; ++I) {
+ Attribute::AttrKind Kind = *I;
+
+ if (Kind == Attribute::Alignment)
+ Mask |= (Log2_32(Alignment) + 1) << 16;
+ else if (Kind == Attribute::StackAlignment)
+ Mask |= (Log2_32(StackAlignment) + 1) << 26;
+ else
+ Mask |= AttributeImpl::getAttrMask(Kind);
+ }
+
+ return Mask;
+}
+
+//===----------------------------------------------------------------------===//
+// AttributeFuncs Function Defintions
+//===----------------------------------------------------------------------===//
+
+Attribute AttributeFuncs::typeIncompatible(Type *Ty) {
+ AttrBuilder Incompatible;
+
+ if (!Ty->isIntegerTy())
+ // Attribute that only apply to integers.
+ Incompatible.addAttribute(Attribute::SExt)
+ .addAttribute(Attribute::ZExt);
+
+ if (!Ty->isPointerTy())
+ // Attribute that only apply to pointers.
+ Incompatible.addAttribute(Attribute::ByVal)
+ .addAttribute(Attribute::Nest)
+ .addAttribute(Attribute::NoAlias)
+ .addAttribute(Attribute::NoCapture)
+ .addAttribute(Attribute::StructRet);
+
+ return Attribute::get(Ty->getContext(), Incompatible);
+}
+
+/// \brief This returns an integer containing an encoding of all the LLVM
+/// attributes found in the given attribute bitset. Any change to this encoding
+/// is a breaking change to bitcode compatibility.
+uint64_t AttributeFuncs::encodeLLVMAttributesForBitcode(AttributeSet Attrs,
+ unsigned Index) {
+ // FIXME: It doesn't make sense to store the alignment information as an
+ // expanded out value, we should store it as a log2 value. However, we can't
+ // just change that here without breaking bitcode compatibility. If this ever
+ // becomes a problem in practice, we should introduce new tag numbers in the
+ // bitcode file and have those tags use a more efficiently encoded alignment
+ // field.
+
+ // Store the alignment in the bitcode as a 16-bit raw value instead of a 5-bit
+ // log2 encoded value. Shift the bits above the alignment up by 11 bits.
+ uint64_t EncodedAttrs = Attrs.Raw(Index) & 0xffff;
+ if (Attrs.hasAttribute(Index, Attribute::Alignment))
+ EncodedAttrs |= Attrs.getParamAlignment(Index) << 16;
+ EncodedAttrs |= (Attrs.Raw(Index) & (0xffffULL << 21)) << 11;
+ return EncodedAttrs;
}
+
+/// \brief This returns an attribute bitset containing the LLVM attributes that
+/// have been decoded from the given integer. This function must stay in sync
+/// with 'encodeLLVMAttributesForBitcode'.
+Attribute AttributeFuncs::decodeLLVMAttributesForBitcode(LLVMContext &C,
+ uint64_t EncodedAttrs){
+ // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
+ // the bits above 31 down by 11 bits.
+ unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
+ assert((!Alignment || isPowerOf2_32(Alignment)) &&
+ "Alignment must be a power of two.");
+
+ AttrBuilder B(EncodedAttrs & 0xffff);
+ if (Alignment)
+ B.addAlignmentAttr(Alignment);
+ B.addRawValue((EncodedAttrs & (0xffffULL << 32)) >> 11);
+ return Attribute::get(C, B);
+}
+
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