-//===-- ParameterAttributes.cpp - Implement ParameterAttrs ----------------===//
+//===-- ParameterAttributes.cpp - Implement ParamAttrsList ----------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file implements the ParamAttrsList class.
+// This file implements the ParamAttrsList class and ParamAttr utilities.
//
//===----------------------------------------------------------------------===//
#include "llvm/ParameterAttributes.h"
+#include "llvm/Type.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/Streams.h"
#include "llvm/Support/ManagedStatic.h"
-
using namespace llvm;
-static ManagedStatic<FoldingSet<ParamAttrsList> > ParamAttrsLists;
-
-ParamAttrsList::ParamAttrsList(const ParamAttrsVector &attrVec)
- : attrs(attrVec), refCount(0) {
-}
-
-ParamAttrsList::~ParamAttrsList() {
- ParamAttrsLists->RemoveNode(this);
-}
-
-uint16_t
-ParamAttrsList::getParamAttrs(uint16_t Index) const {
- unsigned limit = attrs.size();
- for (unsigned i = 0; i < limit && attrs[i].index <= Index; ++i)
- if (attrs[i].index == Index)
- return attrs[i].attrs;
- return ParamAttr::None;
-}
+//===----------------------------------------------------------------------===//
+// ParamAttr Function Definitions
+//===----------------------------------------------------------------------===//
-std::string
-ParamAttrsList::getParamAttrsText(uint16_t Attrs) {
+std::string ParamAttr::getAsString(ParameterAttributes Attrs) {
std::string Result;
if (Attrs & ParamAttr::ZExt)
Result += "zeroext ";
Result += "readnone ";
if (Attrs & ParamAttr::ReadOnly)
Result += "readonly ";
+ if (Attrs & ParamAttr::Alignment) {
+ Result += "align ";
+ Result += utostr((Attrs & ParamAttr::Alignment) >> 16);
+ Result += " ";
+ }
return Result;
}
-/// 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;
- }
+ParameterAttributes ParamAttr::typeIncompatible(const Type *Ty) {
+ ParameterAttributes Incompatible = None;
+
+ if (!Ty->isInteger())
+ // Attributes that only apply to integers.
+ Incompatible |= SExt | ZExt;
+
+ if (!isa<PointerType>(Ty))
+ // Attributes that only apply to pointers.
+ Incompatible |= ByVal | Nest | NoAlias | StructRet;
+
+ return Incompatible;
+}
+
+//===----------------------------------------------------------------------===//
+// ParamAttributeListImpl Definition
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+class ParamAttributeListImpl : public FoldingSetNode {
+ unsigned RefCount;
+
+ // ParamAttrsList is uniqued, these should not be publicly available
+ void operator=(const ParamAttributeListImpl &); // Do not implement
+ ParamAttributeListImpl(const ParamAttributeListImpl &); // Do not implement
+ ~ParamAttributeListImpl(); // Private implementation
+public:
+ SmallVector<ParamAttrsWithIndex, 4> Attrs;
+
+ ParamAttributeListImpl(const ParamAttrsWithIndex *Attr, unsigned NumAttrs)
+ : Attrs(Attr, Attr+NumAttrs) {
+ RefCount = 0;
+ }
+
+ void AddRef() { ++RefCount; }
+ void DropRef() { if (--RefCount == 0) delete this; }
+
+ void Profile(FoldingSetNodeID &ID) const {
+ Profile(ID, &Attrs[0], Attrs.size());
}
- for (; AIndex < ASize; ++AIndex)
- if (!onlyInformative(A->getParamAttrsAtIndex(AIndex)))
- return false;
- for (; BIndex < BSize; ++BIndex)
- if (!onlyInformative(B->getParamAttrsAtIndex(AIndex)))
- return false;
- return true;
+ static void Profile(FoldingSetNodeID &ID, const ParamAttrsWithIndex *Attr,
+ unsigned NumAttrs) {
+ for (unsigned i = 0; i != NumAttrs; ++i)
+ ID.AddInteger(uint64_t(Attr[i].Attrs) << 32 | unsigned(Attr[i].Index));
+ }
+};
}
-void ParamAttrsList::Profile(FoldingSetNodeID &ID,
- const ParamAttrsVector &Attrs) {
- for (unsigned i = 0; i < Attrs.size(); ++i)
- ID.AddInteger(unsigned(Attrs[i].attrs) << 16 | unsigned(Attrs[i].index));
+static ManagedStatic<FoldingSet<ParamAttributeListImpl> > ParamAttrsLists;
+
+ParamAttributeListImpl::~ParamAttributeListImpl() {
+ ParamAttrsLists->RemoveNode(this);
}
-const ParamAttrsList *
-ParamAttrsList::get(const ParamAttrsVector &attrVec) {
- // If there are no attributes then return a null ParamAttrsList pointer.
- if (attrVec.empty())
- return 0;
+PAListPtr PAListPtr::get(const ParamAttrsWithIndex *Attrs, unsigned NumAttrs) {
+ // If there are no attributes then return a null ParamAttrsList pointer.
+ if (NumAttrs == 0)
+ return PAListPtr();
+
#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!");
+ for (unsigned i = 0; i != NumAttrs; ++i) {
+ assert(Attrs[i].Attrs != ParamAttr::None &&
+ "Pointless parameter attribute!");
+ assert((!i || Attrs[i-1].Index < Attrs[i].Index) &&
+ "Misordered ParamAttrsList!");
}
#endif
-
+
// Otherwise, build a key to look up the existing attributes.
FoldingSetNodeID ID;
- ParamAttrsList::Profile(ID, attrVec);
+ ParamAttributeListImpl::Profile(ID, Attrs, NumAttrs);
void *InsertPos;
- ParamAttrsList *PAL = ParamAttrsLists->FindNodeOrInsertPos(ID, InsertPos);
-
+ ParamAttributeListImpl *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);
+ PAL = new ParamAttributeListImpl(Attrs, NumAttrs);
ParamAttrsLists->InsertNode(PAL, InsertPos);
}
-
+
// Return the ParamAttrsList that we found or created.
- return PAL;
+ return PAListPtr(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
+//===----------------------------------------------------------------------===//
+// PAListPtr Method Implementations
+//===----------------------------------------------------------------------===//
- 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);
- }
+PAListPtr::PAListPtr(ParamAttributeListImpl *LI) : PAList(LI) {
+ if (LI) LI->AddRef();
+}
- 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;
- }
- }
+PAListPtr::PAListPtr(const PAListPtr &P) : PAList(P.PAList) {
+ if (PAList) PAList->AddRef();
+}
+
+const PAListPtr &PAListPtr::operator=(const PAListPtr &RHS) {
+ if (PAList == RHS.PAList) return *this;
+ if (PAList) PAList->DropRef();
+ PAList = RHS.PAList;
+ if (PAList) PAList->AddRef();
+ return *this;
+}
+
+PAListPtr::~PAListPtr() {
+ if (PAList) PAList->DropRef();
+}
+
+/// 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 PAListPtr::getNumSlots() const {
+ return PAList ? PAList->Attrs.size() : 0;
+}
+
+/// getSlot - Return the ParamAttrsWithIndex at the specified slot. This
+/// holds a parameter number plus a set of attributes.
+const ParamAttrsWithIndex &PAListPtr::getSlot(unsigned Slot) const {
+ assert(PAList && Slot < PAList->Attrs.size() && "Slot # out of range!");
+ return PAList->Attrs[Slot];
+}
- for (; oldI < oldE; ++oldI)
- newVec.push_back(oldVec[oldI]);
- for (; modI < modE; ++modI)
- if (modVec[modI].attrs != ParamAttr::None)
- newVec.push_back(modVec[modI]);
- return get(newVec);
+/// getParamAttrs - The parameter attributes for the specified parameter are
+/// returned. Parameters for the result are denoted with Idx = 0.
+ParameterAttributes PAListPtr::getParamAttrs(unsigned Idx) const {
+ if (PAList == 0) return ParamAttr::None;
+
+ const SmallVector<ParamAttrsWithIndex, 4> &Attrs = PAList->Attrs;
+ for (unsigned i = 0, e = Attrs.size(); i != e && Attrs[i].Index <= Idx; ++i)
+ if (Attrs[i].Index == Idx)
+ return Attrs[i].Attrs;
+ return ParamAttr::None;
}
-const ParamAttrsList *
-ParamAttrsList::includeAttrs(const ParamAttrsList *PAL,
- uint16_t idx, uint16_t attrs) {
- uint16_t OldAttrs = PAL ? PAL->getParamAttrs(idx) : 0;
- uint16_t NewAttrs = OldAttrs | attrs;
+/// hasAttrSomewhere - Return true if the specified attribute is set for at
+/// least one parameter or for the return value.
+bool PAListPtr::hasAttrSomewhere(ParameterAttributes Attr) const {
+ if (PAList == 0) return false;
+
+ const SmallVector<ParamAttrsWithIndex, 4> &Attrs = PAList->Attrs;
+ for (unsigned i = 0, e = Attrs.size(); i != e; ++i)
+ if (Attrs[i].Attrs & Attr)
+ return true;
+ return false;
+}
+
+
+PAListPtr PAListPtr::addAttr(unsigned Idx, ParameterAttributes Attrs) const {
+ ParameterAttributes OldAttrs = getParamAttrs(Idx);
+#ifndef NDEBUG
+ // FIXME it is not obvious how this should work for alignment.
+ // For now, say we can't change a known alignment.
+ ParameterAttributes OldAlign = OldAttrs & ParamAttr::Alignment;
+ ParameterAttributes NewAlign = Attrs & ParamAttr::Alignment;
+ assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
+ "Attempt to change alignment!");
+#endif
+
+ ParameterAttributes NewAttrs = OldAttrs | Attrs;
if (NewAttrs == OldAttrs)
- return PAL;
+ return *this;
+
+ SmallVector<ParamAttrsWithIndex, 8> NewAttrList;
+ if (PAList == 0)
+ NewAttrList.push_back(ParamAttrsWithIndex::get(Idx, Attrs));
+ else {
+ const SmallVector<ParamAttrsWithIndex, 4> &OldAttrList = PAList->Attrs;
+ 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]);
- ParamAttrsVector modVec;
- modVec.push_back(ParamAttrsWithIndex::get(idx, NewAttrs));
- return getModified(PAL, modVec);
+ // If there are attributes already at this index, merge them in.
+ if (i != e && OldAttrList[i].Index == Idx) {
+ Attrs |= OldAttrList[i].Attrs;
+ ++i;
+ }
+
+ NewAttrList.push_back(ParamAttrsWithIndex::get(Idx, Attrs));
+
+ // Copy attributes for arguments after this one.
+ NewAttrList.insert(NewAttrList.end(),
+ OldAttrList.begin()+i, OldAttrList.end());
+ }
+
+ return get(&NewAttrList[0], NewAttrList.size());
}
-const ParamAttrsList *
-ParamAttrsList::excludeAttrs(const ParamAttrsList *PAL,
- uint16_t idx, uint16_t attrs) {
- uint16_t OldAttrs = PAL ? PAL->getParamAttrs(idx) : 0;
- uint16_t NewAttrs = OldAttrs & ~attrs;
+PAListPtr PAListPtr::removeAttr(unsigned Idx, ParameterAttributes 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 & ParamAttr::Alignment) && "Attempt to exclude alignment!");
+#endif
+ if (PAList == 0) return PAListPtr();
+
+ ParameterAttributes OldAttrs = getParamAttrs(Idx);
+ ParameterAttributes NewAttrs = OldAttrs & ~Attrs;
if (NewAttrs == OldAttrs)
- return PAL;
+ return *this;
- ParamAttrsVector modVec;
- modVec.push_back(ParamAttrsWithIndex::get(idx, NewAttrs));
- return getModified(PAL, modVec);
+ SmallVector<ParamAttrsWithIndex, 8> NewAttrList;
+ const SmallVector<ParamAttrsWithIndex, 4> &OldAttrList = PAList->Attrs;
+ 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.
+ assert(OldAttrList[i].Index == Idx && "Attribute isn't set?");
+ Attrs = OldAttrList[i].Attrs & ~Attrs;
+ ++i;
+ if (Attrs) // If any attributes left for this parameter, add them.
+ NewAttrList.push_back(ParamAttrsWithIndex::get(Idx, Attrs));
+
+ // Copy attributes for arguments after this one.
+ NewAttrList.insert(NewAttrList.end(),
+ OldAttrList.begin()+i, OldAttrList.end());
+
+ return get(&NewAttrList[0], NewAttrList.size());
}
+void PAListPtr::dump() const {
+ cerr << "PAL[ ";
+ for (unsigned i = 0; i < getNumSlots(); ++i) {
+ const ParamAttrsWithIndex &PAWI = getSlot(i);
+ cerr << "{" << PAWI.Index << "," << PAWI.Attrs << "} ";
+ }
+
+ cerr << "]\n";
+}
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