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-rw-r--r--lib/IR/Attributes.cpp110
1 files changed, 90 insertions, 20 deletions
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index 48a2ce8..04545ea 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -47,7 +47,7 @@ Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
if (!Val)
PA = new EnumAttributeImpl(Kind);
else
- PA = new AlignAttributeImpl(Kind, Val);
+ PA = new IntAttributeImpl(Kind, Val);
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
}
@@ -88,6 +88,12 @@ Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
return get(Context, StackAlignment, Align);
}
+Attribute Attribute::getWithDereferenceableBytes(LLVMContext &Context,
+ uint64_t Bytes) {
+ assert(Bytes && "Bytes must be non-zero.");
+ return get(Context, Dereferenceable, Bytes);
+}
+
//===----------------------------------------------------------------------===//
// Attribute Accessor Methods
//===----------------------------------------------------------------------===//
@@ -96,8 +102,8 @@ bool Attribute::isEnumAttribute() const {
return pImpl && pImpl->isEnumAttribute();
}
-bool Attribute::isAlignAttribute() const {
- return pImpl && pImpl->isAlignAttribute();
+bool Attribute::isIntAttribute() const {
+ return pImpl && pImpl->isIntAttribute();
}
bool Attribute::isStringAttribute() const {
@@ -106,15 +112,15 @@ bool Attribute::isStringAttribute() const {
Attribute::AttrKind Attribute::getKindAsEnum() const {
if (!pImpl) return None;
- assert((isEnumAttribute() || isAlignAttribute()) &&
+ assert((isEnumAttribute() || isIntAttribute()) &&
"Invalid attribute type to get the kind as an enum!");
return pImpl ? pImpl->getKindAsEnum() : None;
}
uint64_t Attribute::getValueAsInt() const {
if (!pImpl) return 0;
- assert(isAlignAttribute() &&
- "Expected the attribute to be an alignment attribute!");
+ assert(isIntAttribute() &&
+ "Expected the attribute to be an integer attribute!");
return pImpl ? pImpl->getValueAsInt() : 0;
}
@@ -156,6 +162,14 @@ unsigned Attribute::getStackAlignment() const {
return pImpl->getValueAsInt();
}
+/// This returns the number of dereferenceable bytes.
+uint64_t Attribute::getDereferenceableBytes() const {
+ assert(hasAttribute(Attribute::Dereferenceable) &&
+ "Trying to get dereferenceable bytes from "
+ "non-dereferenceable attribute!");
+ return pImpl->getValueAsInt();
+}
+
std::string Attribute::getAsString(bool InAttrGrp) const {
if (!pImpl) return "";
@@ -263,6 +277,20 @@ std::string Attribute::getAsString(bool InAttrGrp) const {
return Result;
}
+ if (hasAttribute(Attribute::Dereferenceable)) {
+ std::string Result;
+ Result += "dereferenceable";
+ if (InAttrGrp) {
+ Result += "=";
+ Result += utostr(getValueAsInt());
+ } else {
+ Result += "(";
+ Result += utostr(getValueAsInt());
+ Result += ")";
+ }
+ return Result;
+ }
+
// Convert target-dependent attributes to strings of the form:
//
// "kind"
@@ -296,7 +324,7 @@ bool Attribute::operator<(Attribute A) const {
// Pin the vtables to this file.
AttributeImpl::~AttributeImpl() {}
void EnumAttributeImpl::anchor() {}
-void AlignAttributeImpl::anchor() {}
+void IntAttributeImpl::anchor() {}
void StringAttributeImpl::anchor() {}
bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
@@ -310,13 +338,13 @@ bool AttributeImpl::hasAttribute(StringRef Kind) const {
}
Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
- assert(isEnumAttribute() || isAlignAttribute());
+ assert(isEnumAttribute() || isIntAttribute());
return static_cast<const EnumAttributeImpl *>(this)->getEnumKind();
}
uint64_t AttributeImpl::getValueAsInt() const {
- assert(isAlignAttribute());
- return static_cast<const AlignAttributeImpl *>(this)->getAlignment();
+ assert(isIntAttribute());
+ return static_cast<const IntAttributeImpl *>(this)->getValue();
}
StringRef AttributeImpl::getKindAsString() const {
@@ -334,18 +362,18 @@ bool AttributeImpl::operator<(const AttributeImpl &AI) const {
// relative to their enum value) and then strings.
if (isEnumAttribute()) {
if (AI.isEnumAttribute()) return getKindAsEnum() < AI.getKindAsEnum();
- if (AI.isAlignAttribute()) return true;
+ if (AI.isIntAttribute()) return true;
if (AI.isStringAttribute()) return true;
}
- if (isAlignAttribute()) {
+ if (isIntAttribute()) {
if (AI.isEnumAttribute()) return false;
- if (AI.isAlignAttribute()) return getValueAsInt() < AI.getValueAsInt();
+ if (AI.isIntAttribute()) return getValueAsInt() < AI.getValueAsInt();
if (AI.isStringAttribute()) return true;
}
if (AI.isEnumAttribute()) return false;
- if (AI.isAlignAttribute()) return false;
+ if (AI.isIntAttribute()) return false;
if (getKindAsString() == AI.getKindAsString())
return getValueAsString() < AI.getValueAsString();
return getKindAsString() < AI.getKindAsString();
@@ -398,6 +426,8 @@ uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
case Attribute::InAlloca: return 1ULL << 43;
case Attribute::NonNull: return 1ULL << 44;
case Attribute::JumpTable: return 1ULL << 45;
+ case Attribute::Dereferenceable:
+ llvm_unreachable("dereferenceable attribute not supported in raw format");
}
llvm_unreachable("Unsupported attribute type");
}
@@ -482,6 +512,13 @@ unsigned AttributeSetNode::getStackAlignment() const {
return 0;
}
+uint64_t AttributeSetNode::getDereferenceableBytes() const {
+ for (iterator I = begin(), E = end(); I != E; ++I)
+ if (I->hasAttribute(Attribute::Dereferenceable))
+ return I->getDereferenceableBytes();
+ return 0;
+}
+
std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
std::string Str;
for (iterator I = begin(), E = end(); I != E; ++I) {
@@ -515,6 +552,8 @@ uint64_t AttributeSetImpl::Raw(unsigned Index) const {
Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
else if (Kind == Attribute::StackAlignment)
Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
+ else if (Kind == Attribute::Dereferenceable)
+ llvm_unreachable("dereferenceable not supported in bit mask");
else
Mask |= AttributeImpl::getAttrMask(Kind);
}
@@ -620,6 +659,10 @@ AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index,
else if (Kind == Attribute::StackAlignment)
Attrs.push_back(std::make_pair(Index, Attribute::
getWithStackAlignment(C, B.getStackAlignment())));
+ else if (Kind == Attribute::Dereferenceable)
+ Attrs.push_back(std::make_pair(Index,
+ Attribute::getWithDereferenceableBytes(C,
+ B.getDereferenceableBytes())));
else
Attrs.push_back(std::make_pair(Index, Attribute::get(C, Kind)));
}
@@ -877,6 +920,11 @@ unsigned AttributeSet::getStackAlignment(unsigned Index) const {
return ASN ? ASN->getStackAlignment() : 0;
}
+uint64_t AttributeSet::getDereferenceableBytes(unsigned Index) const {
+ AttributeSetNode *ASN = getAttributes(Index);
+ return ASN ? ASN->getDereferenceableBytes() : 0;
+}
+
std::string AttributeSet::getAsString(unsigned Index,
bool InAttrGrp) const {
AttributeSetNode *ASN = getAttributes(Index);
@@ -956,7 +1004,7 @@ void AttributeSet::dump() const {
//===----------------------------------------------------------------------===//
AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Index)
- : Attrs(0), Alignment(0), StackAlignment(0) {
+ : Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0) {
AttributeSetImpl *pImpl = AS.pImpl;
if (!pImpl) return;
@@ -973,13 +1021,14 @@ AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Index)
void AttrBuilder::clear() {
Attrs.reset();
- Alignment = StackAlignment = 0;
+ Alignment = StackAlignment = DerefBytes = 0;
}
AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
- "Adding alignment attribute without adding alignment value!");
+ Val != Attribute::Dereferenceable &&
+ "Adding integer attribute without adding a value!");
Attrs[Val] = true;
return *this;
}
@@ -997,6 +1046,8 @@ AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
Alignment = Attr.getAlignment();
else if (Kind == Attribute::StackAlignment)
StackAlignment = Attr.getStackAlignment();
+ else if (Kind == Attribute::Dereferenceable)
+ DerefBytes = Attr.getDereferenceableBytes();
return *this;
}
@@ -1013,6 +1064,8 @@ AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
Alignment = 0;
else if (Val == Attribute::StackAlignment)
StackAlignment = 0;
+ else if (Val == Attribute::Dereferenceable)
+ DerefBytes = 0;
return *this;
}
@@ -1029,7 +1082,7 @@ AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot); I != E; ++I) {
Attribute Attr = *I;
- if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
+ if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
Attribute::AttrKind Kind = I->getKindAsEnum();
Attrs[Kind] = false;
@@ -1037,6 +1090,8 @@ AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
Alignment = 0;
else if (Kind == Attribute::StackAlignment)
StackAlignment = 0;
+ else if (Kind == Attribute::Dereferenceable)
+ DerefBytes = 0;
} else {
assert(Attr.isStringAttribute() && "Invalid attribute type!");
std::map<std::string, std::string>::iterator
@@ -1079,6 +1134,14 @@ AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
return *this;
}
+AttrBuilder &AttrBuilder::addDereferenceableAttr(uint64_t Bytes) {
+ if (Bytes == 0) return *this;
+
+ Attrs[Attribute::Dereferenceable] = true;
+ DerefBytes = Bytes;
+ return *this;
+}
+
AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
// FIXME: What if both have alignments, but they don't match?!
if (!Alignment)
@@ -1087,6 +1150,9 @@ AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
if (!StackAlignment)
StackAlignment = B.StackAlignment;
+ if (!DerefBytes)
+ DerefBytes = B.DerefBytes;
+
Attrs |= B.Attrs;
for (td_const_iterator I = B.TargetDepAttrs.begin(),
@@ -1117,7 +1183,7 @@ bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot);
I != E; ++I) {
Attribute Attr = *I;
- if (Attr.isEnumAttribute() || Attr.isAlignAttribute()) {
+ if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
if (Attrs[I->getKindAsEnum()])
return true;
} else {
@@ -1142,7 +1208,8 @@ bool AttrBuilder::operator==(const AttrBuilder &B) {
if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
return false;
- return Alignment == B.Alignment && StackAlignment == B.StackAlignment;
+ return Alignment == B.Alignment && StackAlignment == B.StackAlignment &&
+ DerefBytes == B.DerefBytes;
}
AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
@@ -1151,6 +1218,8 @@ AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
I = Attribute::AttrKind(I + 1)) {
+ if (I == Attribute::Dereferenceable)
+ continue;
if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
Attrs[I] = true;
@@ -1184,6 +1253,7 @@ AttributeSet AttributeFuncs::typeIncompatible(Type *Ty, uint64_t Index) {
.addAttribute(Attribute::NoAlias)
.addAttribute(Attribute::NoCapture)
.addAttribute(Attribute::NonNull)
+ .addDereferenceableAttr(1) // the int here is ignored
.addAttribute(Attribute::ReadNone)
.addAttribute(Attribute::ReadOnly)
.addAttribute(Attribute::StructRet)
generated by cgit v1.1 at 2024-12-22 14:59:45 +0000