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llvm-project/llvm/lib/IR/Attributes.cpp

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//===- Attributes.cpp - Implement AttributesList --------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// \file
// This file implements the Attribute, AttributeImpl, AttrBuilder,
// AttributeListImpl, and AttributeList classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Attributes.h"
#include "AttributeImpl.h"
#include "LLVMContextImpl.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <climits>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <string>
#include <tuple>
#include <utility>
using namespace llvm;
//===----------------------------------------------------------------------===//
// Attribute Construction Methods
//===----------------------------------------------------------------------===//
// allocsize has two integer arguments, but because they're both 32 bits, we can
// pack them into one 64-bit value, at the cost of making said value
// nonsensical.
//
// In order to do this, we need to reserve one value of the second (optional)
// allocsize argument to signify "not present."
static const unsigned AllocSizeNumElemsNotPresent = -1;
static uint64_t packAllocSizeArgs(unsigned ElemSizeArg,
const Optional<unsigned> &NumElemsArg) {
assert((!NumElemsArg.hasValue() ||
*NumElemsArg != AllocSizeNumElemsNotPresent) &&
"Attempting to pack a reserved value");
return uint64_t(ElemSizeArg) << 32 |
NumElemsArg.getValueOr(AllocSizeNumElemsNotPresent);
}
static std::pair<unsigned, Optional<unsigned>>
unpackAllocSizeArgs(uint64_t Num) {
unsigned NumElems = Num & std::numeric_limits<unsigned>::max();
unsigned ElemSizeArg = Num >> 32;
Optional<unsigned> NumElemsArg;
if (NumElems != AllocSizeNumElemsNotPresent)
NumElemsArg = NumElems;
return std::make_pair(ElemSizeArg, NumElemsArg);
}
static uint64_t packVScaleRangeArgs(unsigned MinValue, unsigned MaxValue) {
return uint64_t(MinValue) << 32 | MaxValue;
}
static std::pair<unsigned, unsigned> unpackVScaleRangeArgs(uint64_t Value) {
unsigned MaxValue = Value & std::numeric_limits<unsigned>::max();
unsigned MinValue = Value >> 32;
return std::make_pair(MinValue, MaxValue);
}
Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
uint64_t Val) {
if (Val)
assert(Attribute::isIntAttrKind(Kind) && "Not an int attribute");
else
assert(Attribute::isEnumAttrKind(Kind) && "Not an enum attribute");
LLVMContextImpl *pImpl = Context.pImpl;
FoldingSetNodeID ID;
ID.AddInteger(Kind);
if (Val) ID.AddInteger(Val);
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.
if (!Val)
PA = new (pImpl->Alloc) EnumAttributeImpl(Kind);
else
PA = new (pImpl->Alloc) IntAttributeImpl(Kind, Val);
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
}
// Return the Attribute that we found or created.
return Attribute(PA);
}
Attribute Attribute::get(LLVMContext &Context, StringRef Kind, StringRef Val) {
LLVMContextImpl *pImpl = Context.pImpl;
FoldingSetNodeID ID;
ID.AddString(Kind);
if (!Val.empty()) ID.AddString(Val);
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.
void *Mem =
pImpl->Alloc.Allocate(StringAttributeImpl::totalSizeToAlloc(Kind, Val),
alignof(StringAttributeImpl));
PA = new (Mem) StringAttributeImpl(Kind, Val);
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
}
// Return the Attribute that we found or created.
return Attribute(PA);
}
Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
Type *Ty) {
assert(Attribute::isTypeAttrKind(Kind) && "Not a type attribute");
LLVMContextImpl *pImpl = Context.pImpl;
FoldingSetNodeID ID;
ID.AddInteger(Kind);
ID.AddPointer(Ty);
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 (pImpl->Alloc) TypeAttributeImpl(Kind, Ty);
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
}
// Return the Attribute that we found or created.
return Attribute(PA);
}
Attribute Attribute::getWithAlignment(LLVMContext &Context, Align A) {
assert(A <= llvm::Value::MaximumAlignment && "Alignment too large.");
return get(Context, Alignment, A.value());
}
Attribute Attribute::getWithStackAlignment(LLVMContext &Context, Align A) {
assert(A <= 0x100 && "Alignment too large.");
return get(Context, StackAlignment, A.value());
}
Attribute Attribute::getWithDereferenceableBytes(LLVMContext &Context,
uint64_t Bytes) {
assert(Bytes && "Bytes must be non-zero.");
return get(Context, Dereferenceable, Bytes);
}
Attribute Attribute::getWithDereferenceableOrNullBytes(LLVMContext &Context,
uint64_t Bytes) {
assert(Bytes && "Bytes must be non-zero.");
return get(Context, DereferenceableOrNull, Bytes);
}
Attribute Attribute::getWithByValType(LLVMContext &Context, Type *Ty) {
return get(Context, ByVal, Ty);
}
Attribute Attribute::getWithStructRetType(LLVMContext &Context, Type *Ty) {
return get(Context, StructRet, Ty);
}
Attribute Attribute::getWithByRefType(LLVMContext &Context, Type *Ty) {
return get(Context, ByRef, Ty);
}
Attribute Attribute::getWithPreallocatedType(LLVMContext &Context, Type *Ty) {
return get(Context, Preallocated, Ty);
}
Attribute Attribute::getWithInAllocaType(LLVMContext &Context, Type *Ty) {
return get(Context, InAlloca, Ty);
}
Attribute
Attribute::getWithAllocSizeArgs(LLVMContext &Context, unsigned ElemSizeArg,
const Optional<unsigned> &NumElemsArg) {
assert(!(ElemSizeArg == 0 && NumElemsArg && *NumElemsArg == 0) &&
"Invalid allocsize arguments -- given allocsize(0, 0)");
return get(Context, AllocSize, packAllocSizeArgs(ElemSizeArg, NumElemsArg));
}
Attribute Attribute::getWithVScaleRangeArgs(LLVMContext &Context,
unsigned MinValue,
unsigned MaxValue) {
return get(Context, VScaleRange, packVScaleRangeArgs(MinValue, MaxValue));
}
Attribute::AttrKind Attribute::getAttrKindFromName(StringRef AttrName) {
return StringSwitch<Attribute::AttrKind>(AttrName)
#define GET_ATTR_NAMES
#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME) \
.Case(#DISPLAY_NAME, Attribute::ENUM_NAME)
#include "llvm/IR/Attributes.inc"
.Default(Attribute::None);
}
StringRef Attribute::getNameFromAttrKind(Attribute::AttrKind AttrKind) {
switch (AttrKind) {
#define GET_ATTR_NAMES
#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME) \
case Attribute::ENUM_NAME: \
return #DISPLAY_NAME;
#include "llvm/IR/Attributes.inc"
case Attribute::None:
return "none";
default:
llvm_unreachable("invalid Kind");
}
}
bool Attribute::isExistingAttribute(StringRef Name) {
return StringSwitch<bool>(Name)
#define GET_ATTR_NAMES
#define ATTRIBUTE_ALL(ENUM_NAME, DISPLAY_NAME) .Case(#DISPLAY_NAME, true)
#include "llvm/IR/Attributes.inc"
.Default(false);
}
//===----------------------------------------------------------------------===//
// Attribute Accessor Methods
//===----------------------------------------------------------------------===//
bool Attribute::isEnumAttribute() const {
return pImpl && pImpl->isEnumAttribute();
}
bool Attribute::isIntAttribute() const {
return pImpl && pImpl->isIntAttribute();
}
bool Attribute::isStringAttribute() const {
return pImpl && pImpl->isStringAttribute();
}
bool Attribute::isTypeAttribute() const {
return pImpl && pImpl->isTypeAttribute();
}
Attribute::AttrKind Attribute::getKindAsEnum() const {
if (!pImpl) return None;
assert((isEnumAttribute() || isIntAttribute() || isTypeAttribute()) &&
"Invalid attribute type to get the kind as an enum!");
return pImpl->getKindAsEnum();
}
uint64_t Attribute::getValueAsInt() const {
if (!pImpl) return 0;
assert(isIntAttribute() &&
"Expected the attribute to be an integer attribute!");
return pImpl->getValueAsInt();
}
bool Attribute::getValueAsBool() const {
if (!pImpl) return false;
assert(isStringAttribute() &&
"Expected the attribute to be a string attribute!");
return pImpl->getValueAsBool();
}
StringRef Attribute::getKindAsString() const {
if (!pImpl) return {};
assert(isStringAttribute() &&
"Invalid attribute type to get the kind as a string!");
return pImpl->getKindAsString();
}
StringRef Attribute::getValueAsString() const {
if (!pImpl) return {};
assert(isStringAttribute() &&
"Invalid attribute type to get the value as a string!");
return pImpl->getValueAsString();
}
Type *Attribute::getValueAsType() const {
if (!pImpl) return {};
assert(isTypeAttribute() &&
"Invalid attribute type to get the value as a type!");
return pImpl->getValueAsType();
}
bool Attribute::hasAttribute(AttrKind Kind) const {
return (pImpl && pImpl->hasAttribute(Kind)) || (!pImpl && Kind == None);
}
bool Attribute::hasAttribute(StringRef Kind) const {
if (!isStringAttribute()) return false;
return pImpl && pImpl->hasAttribute(Kind);
}
MaybeAlign Attribute::getAlignment() const {
assert(hasAttribute(Attribute::Alignment) &&
"Trying to get alignment from non-alignment attribute!");
return MaybeAlign(pImpl->getValueAsInt());
}
MaybeAlign Attribute::getStackAlignment() const {
assert(hasAttribute(Attribute::StackAlignment) &&
"Trying to get alignment from non-alignment attribute!");
return MaybeAlign(pImpl->getValueAsInt());
}
uint64_t Attribute::getDereferenceableBytes() const {
assert(hasAttribute(Attribute::Dereferenceable) &&
"Trying to get dereferenceable bytes from "
"non-dereferenceable attribute!");
return pImpl->getValueAsInt();
}
uint64_t Attribute::getDereferenceableOrNullBytes() const {
assert(hasAttribute(Attribute::DereferenceableOrNull) &&
"Trying to get dereferenceable bytes from "
"non-dereferenceable attribute!");
return pImpl->getValueAsInt();
}
std::pair<unsigned, Optional<unsigned>> Attribute::getAllocSizeArgs() const {
assert(hasAttribute(Attribute::AllocSize) &&
"Trying to get allocsize args from non-allocsize attribute");
return unpackAllocSizeArgs(pImpl->getValueAsInt());
}
std::pair<unsigned, unsigned> Attribute::getVScaleRangeArgs() const {
assert(hasAttribute(Attribute::VScaleRange) &&
"Trying to get vscale args from non-vscale attribute");
return unpackVScaleRangeArgs(pImpl->getValueAsInt());
}
std::string Attribute::getAsString(bool InAttrGrp) const {
if (!pImpl) return {};
if (isEnumAttribute())
return getNameFromAttrKind(getKindAsEnum()).str();
if (isTypeAttribute()) {
std::string Result = getNameFromAttrKind(getKindAsEnum()).str();
Result += '(';
raw_string_ostream OS(Result);
getValueAsType()->print(OS, false, true);
OS.flush();
Result += ')';
return Result;
}
// FIXME: These should be output like this:
//
// align=4
// alignstack=8
//
if (hasAttribute(Attribute::Alignment)) {
std::string Result;
Result += "align";
Result += (InAttrGrp) ? "=" : " ";
Result += utostr(getValueAsInt());
return Result;
}
auto AttrWithBytesToString = [&](const char *Name) {
std::string Result;
Result += Name;
if (InAttrGrp) {
Result += "=";
Result += utostr(getValueAsInt());
} else {
Result += "(";
Result += utostr(getValueAsInt());
Result += ")";
}
return Result;
};
if (hasAttribute(Attribute::StackAlignment))
return AttrWithBytesToString("alignstack");
if (hasAttribute(Attribute::Dereferenceable))
return AttrWithBytesToString("dereferenceable");
if (hasAttribute(Attribute::DereferenceableOrNull))
return AttrWithBytesToString("dereferenceable_or_null");
if (hasAttribute(Attribute::AllocSize)) {
unsigned ElemSize;
Optional<unsigned> NumElems;
std::tie(ElemSize, NumElems) = getAllocSizeArgs();
std::string Result = "allocsize(";
Result += utostr(ElemSize);
if (NumElems.hasValue()) {
Result += ',';
Result += utostr(*NumElems);
}
Result += ')';
return Result;
}
if (hasAttribute(Attribute::VScaleRange)) {
unsigned MinValue, MaxValue;
std::tie(MinValue, MaxValue) = getVScaleRangeArgs();
std::string Result = "vscale_range(";
Result += utostr(MinValue);
Result += ',';
Result += utostr(MaxValue);
Result += ')';
return Result;
}
// Convert target-dependent attributes to strings of the form:
//
// "kind"
// "kind" = "value"
//
if (isStringAttribute()) {
std::string Result;
{
raw_string_ostream OS(Result);
OS << '"' << getKindAsString() << '"';
// Since some attribute strings contain special characters that cannot be
// printable, those have to be escaped to make the attribute value
// printable as is. e.g. "\01__gnu_mcount_nc"
const auto &AttrVal = pImpl->getValueAsString();
if (!AttrVal.empty()) {
OS << "=\"";
printEscapedString(AttrVal, OS);
OS << "\"";
}
}
return Result;
}
llvm_unreachable("Unknown attribute");
}
bool Attribute::hasParentContext(LLVMContext &C) const {
assert(isValid() && "invalid Attribute doesn't refer to any context");
FoldingSetNodeID ID;
pImpl->Profile(ID);
void *Unused;
return C.pImpl->AttrsSet.FindNodeOrInsertPos(ID, Unused) == pImpl;
}
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;
}
void Attribute::Profile(FoldingSetNodeID &ID) const {
ID.AddPointer(pImpl);
}
enum AttributeProperty {
FnAttr = (1 << 0),
ParamAttr = (1 << 1),
RetAttr = (1 << 2),
};
#define GET_ATTR_PROP_TABLE
#include "llvm/IR/Attributes.inc"
static bool hasAttributeProperty(Attribute::AttrKind Kind,
AttributeProperty Prop) {
unsigned Index = Kind - 1;
assert(Index < sizeof(AttrPropTable) / sizeof(AttrPropTable[0]) &&
"Invalid attribute kind");
return AttrPropTable[Index] & Prop;
}
bool Attribute::canUseAsFnAttr(AttrKind Kind) {
return hasAttributeProperty(Kind, AttributeProperty::FnAttr);
}
bool Attribute::canUseAsParamAttr(AttrKind Kind) {
return hasAttributeProperty(Kind, AttributeProperty::ParamAttr);
}
bool Attribute::canUseAsRetAttr(AttrKind Kind) {
return hasAttributeProperty(Kind, AttributeProperty::RetAttr);
}
//===----------------------------------------------------------------------===//
// AttributeImpl Definition
//===----------------------------------------------------------------------===//
bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
if (isStringAttribute()) return false;
return getKindAsEnum() == A;
}
bool AttributeImpl::hasAttribute(StringRef Kind) const {
if (!isStringAttribute()) return false;
return getKindAsString() == Kind;
}
Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
assert(isEnumAttribute() || isIntAttribute() || isTypeAttribute());
return static_cast<const EnumAttributeImpl *>(this)->getEnumKind();
}
uint64_t AttributeImpl::getValueAsInt() const {
assert(isIntAttribute());
return static_cast<const IntAttributeImpl *>(this)->getValue();
}
bool AttributeImpl::getValueAsBool() const {
assert(getValueAsString().empty() || getValueAsString() == "false" || getValueAsString() == "true");
return getValueAsString() == "true";
}
StringRef AttributeImpl::getKindAsString() const {
assert(isStringAttribute());
return static_cast<const StringAttributeImpl *>(this)->getStringKind();
}
StringRef AttributeImpl::getValueAsString() const {
assert(isStringAttribute());
return static_cast<const StringAttributeImpl *>(this)->getStringValue();
}
Type *AttributeImpl::getValueAsType() const {
assert(isTypeAttribute());
return static_cast<const TypeAttributeImpl *>(this)->getTypeValue();
}
bool AttributeImpl::operator<(const AttributeImpl &AI) const {
if (this == &AI)
return false;
// This sorts the attributes with Attribute::AttrKinds coming first (sorted
// relative to their enum value) and then strings.
if (!isStringAttribute()) {
if (AI.isStringAttribute())
return true;
if (getKindAsEnum() != AI.getKindAsEnum())
return getKindAsEnum() < AI.getKindAsEnum();
assert(!AI.isEnumAttribute() && "Non-unique attribute");
assert(!AI.isTypeAttribute() && "Comparison of types would be unstable");
// TODO: Is this actually needed?
assert(AI.isIntAttribute() && "Only possibility left");
return getValueAsInt() < AI.getValueAsInt();
}
if (!AI.isStringAttribute())
return false;
if (getKindAsString() == AI.getKindAsString())
return getValueAsString() < AI.getValueAsString();
return getKindAsString() < AI.getKindAsString();
}
//===----------------------------------------------------------------------===//
// AttributeSet Definition
//===----------------------------------------------------------------------===//
AttributeSet AttributeSet::get(LLVMContext &C, const AttrBuilder &B) {
return AttributeSet(AttributeSetNode::get(C, B));
}
AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<Attribute> Attrs) {
return AttributeSet(AttributeSetNode::get(C, Attrs));
}
AttributeSet AttributeSet::addAttribute(LLVMContext &C,
Attribute::AttrKind Kind) const {
if (hasAttribute(Kind)) return *this;
AttrBuilder B;
B.addAttribute(Kind);
return addAttributes(C, AttributeSet::get(C, B));
}
AttributeSet AttributeSet::addAttribute(LLVMContext &C, StringRef Kind,
StringRef Value) const {
AttrBuilder B;
B.addAttribute(Kind, Value);
return addAttributes(C, AttributeSet::get(C, B));
}
AttributeSet AttributeSet::addAttributes(LLVMContext &C,
const AttributeSet AS) const {
if (!hasAttributes())
return AS;
if (!AS.hasAttributes())
return *this;
AttrBuilder B(AS);
for (const auto &I : *this)
B.addAttribute(I);
return get(C, B);
}
AttributeSet AttributeSet::removeAttribute(LLVMContext &C,
Attribute::AttrKind Kind) const {
if (!hasAttribute(Kind)) return *this;
AttrBuilder B(*this);
B.removeAttribute(Kind);
return get(C, B);
}
AttributeSet AttributeSet::removeAttribute(LLVMContext &C,
StringRef Kind) const {
if (!hasAttribute(Kind)) return *this;
AttrBuilder B(*this);
B.removeAttribute(Kind);
return get(C, B);
}
AttributeSet AttributeSet::removeAttributes(LLVMContext &C,
const AttrBuilder &Attrs) const {
AttrBuilder B(*this);
// If there is nothing to remove, directly return the original set.
if (!B.overlaps(Attrs))
return *this;
B.remove(Attrs);
return get(C, B);
}
unsigned AttributeSet::getNumAttributes() const {
return SetNode ? SetNode->getNumAttributes() : 0;
}
bool AttributeSet::hasAttribute(Attribute::AttrKind Kind) const {
return SetNode ? SetNode->hasAttribute(Kind) : false;
}
bool AttributeSet::hasAttribute(StringRef Kind) const {
return SetNode ? SetNode->hasAttribute(Kind) : false;
}
Attribute AttributeSet::getAttribute(Attribute::AttrKind Kind) const {
return SetNode ? SetNode->getAttribute(Kind) : Attribute();
}
Attribute AttributeSet::getAttribute(StringRef Kind) const {
return SetNode ? SetNode->getAttribute(Kind) : Attribute();
}
MaybeAlign AttributeSet::getAlignment() const {
return SetNode ? SetNode->getAlignment() : None;
}
MaybeAlign AttributeSet::getStackAlignment() const {
return SetNode ? SetNode->getStackAlignment() : None;
}
uint64_t AttributeSet::getDereferenceableBytes() const {
return SetNode ? SetNode->getDereferenceableBytes() : 0;
}
uint64_t AttributeSet::getDereferenceableOrNullBytes() const {
return SetNode ? SetNode->getDereferenceableOrNullBytes() : 0;
}
Type *AttributeSet::getByRefType() const {
return SetNode ? SetNode->getAttributeType(Attribute::ByRef) : nullptr;
}
Type *AttributeSet::getByValType() const {
return SetNode ? SetNode->getAttributeType(Attribute::ByVal) : nullptr;
}
Type *AttributeSet::getStructRetType() const {
return SetNode ? SetNode->getAttributeType(Attribute::StructRet) : nullptr;
}
Type *AttributeSet::getPreallocatedType() const {
return SetNode ? SetNode->getAttributeType(Attribute::Preallocated) : nullptr;
}
Type *AttributeSet::getInAllocaType() const {
return SetNode ? SetNode->getAttributeType(Attribute::InAlloca) : nullptr;
}
Type *AttributeSet::getElementType() const {
return SetNode ? SetNode->getAttributeType(Attribute::ElementType) : nullptr;
}
std::pair<unsigned, Optional<unsigned>> AttributeSet::getAllocSizeArgs() const {
return SetNode ? SetNode->getAllocSizeArgs()
: std::pair<unsigned, Optional<unsigned>>(0, 0);
}
std::pair<unsigned, unsigned> AttributeSet::getVScaleRangeArgs() const {
return SetNode ? SetNode->getVScaleRangeArgs()
: std::pair<unsigned, unsigned>(0, 0);
}
std::string AttributeSet::getAsString(bool InAttrGrp) const {
return SetNode ? SetNode->getAsString(InAttrGrp) : "";
}
bool AttributeSet::hasParentContext(LLVMContext &C) const {
assert(hasAttributes() && "empty AttributeSet doesn't refer to any context");
FoldingSetNodeID ID;
SetNode->Profile(ID);
void *Unused;
return C.pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, Unused) == SetNode;
}
AttributeSet::iterator AttributeSet::begin() const {
return SetNode ? SetNode->begin() : nullptr;
}
AttributeSet::iterator AttributeSet::end() const {
return SetNode ? SetNode->end() : nullptr;
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void AttributeSet::dump() const {
dbgs() << "AS =\n";
dbgs() << " { ";
dbgs() << getAsString(true) << " }\n";
}
#endif
//===----------------------------------------------------------------------===//
// AttributeSetNode Definition
//===----------------------------------------------------------------------===//
AttributeSetNode::AttributeSetNode(ArrayRef<Attribute> Attrs)
: NumAttrs(Attrs.size()) {
// There's memory after the node where we can store the entries in.
llvm::copy(Attrs, getTrailingObjects<Attribute>());
for (const auto &I : *this) {
if (I.isStringAttribute())
StringAttrs.insert({ I.getKindAsString(), I });
else
AvailableAttrs.addAttribute(I.getKindAsEnum());
}
}
AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
ArrayRef<Attribute> Attrs) {
SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
llvm::sort(SortedAttrs);
return getSorted(C, SortedAttrs);
}
AttributeSetNode *AttributeSetNode::getSorted(LLVMContext &C,
ArrayRef<Attribute> SortedAttrs) {
if (SortedAttrs.empty())
return nullptr;
// Build a key to look up the existing attributes.
LLVMContextImpl *pImpl = C.pImpl;
FoldingSetNodeID ID;
assert(llvm::is_sorted(SortedAttrs) && "Expected sorted attributes!");
for (const auto &Attr : SortedAttrs)
Attr.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) {
// Coallocate entries after the AttributeSetNode itself.
void *Mem = ::operator new(totalSizeToAlloc<Attribute>(SortedAttrs.size()));
PA = new (Mem) AttributeSetNode(SortedAttrs);
pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
}
// Return the AttributeSetNode that we found or created.
return PA;
}
AttributeSetNode *AttributeSetNode::get(LLVMContext &C, const AttrBuilder &B) {
// Add target-independent attributes.
SmallVector<Attribute, 8> Attrs;
for (Attribute::AttrKind Kind = Attribute::None;
Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
if (!B.contains(Kind))
continue;
Attribute Attr;
if (Attribute::isTypeAttrKind(Kind))
Attr = Attribute::get(C, Kind, B.getTypeAttr(Kind));
else if (Attribute::isIntAttrKind(Kind))
Attr = Attribute::get(C, Kind, B.getRawIntAttr(Kind));
else
Attr = Attribute::get(C, Kind);
Attrs.push_back(Attr);
}
// Add target-dependent (string) attributes.
for (const auto &TDA : B.td_attrs())
Attrs.emplace_back(Attribute::get(C, TDA.first, TDA.second));
return getSorted(C, Attrs);
}
bool AttributeSetNode::hasAttribute(StringRef Kind) const {
return StringAttrs.count(Kind);
}
Optional<Attribute>
AttributeSetNode::findEnumAttribute(Attribute::AttrKind Kind) const {
// Do a quick presence check.
if (!hasAttribute(Kind))
return None;
// Attributes in a set are sorted by enum value, followed by string
// attributes. Binary search the one we want.
const Attribute *I =
std::lower_bound(begin(), end() - StringAttrs.size(), Kind,
[](Attribute A, Attribute::AttrKind Kind) {
return A.getKindAsEnum() < Kind;
});
assert(I != end() && I->hasAttribute(Kind) && "Presence check failed?");
return *I;
}
Attribute AttributeSetNode::getAttribute(Attribute::AttrKind Kind) const {
if (auto A = findEnumAttribute(Kind))
return *A;
return {};
}
Attribute AttributeSetNode::getAttribute(StringRef Kind) const {
return StringAttrs.lookup(Kind);
}
MaybeAlign AttributeSetNode::getAlignment() const {
if (auto A = findEnumAttribute(Attribute::Alignment))
return A->getAlignment();
return None;
}
MaybeAlign AttributeSetNode::getStackAlignment() const {
if (auto A = findEnumAttribute(Attribute::StackAlignment))
return A->getStackAlignment();
return None;
}
Type *AttributeSetNode::getAttributeType(Attribute::AttrKind Kind) const {
if (auto A = findEnumAttribute(Kind))
return A->getValueAsType();
return nullptr;
}
uint64_t AttributeSetNode::getDereferenceableBytes() const {
if (auto A = findEnumAttribute(Attribute::Dereferenceable))
return A->getDereferenceableBytes();
return 0;
}
uint64_t AttributeSetNode::getDereferenceableOrNullBytes() const {
if (auto A = findEnumAttribute(Attribute::DereferenceableOrNull))
return A->getDereferenceableOrNullBytes();
return 0;
}
std::pair<unsigned, Optional<unsigned>>
AttributeSetNode::getAllocSizeArgs() const {
if (auto A = findEnumAttribute(Attribute::AllocSize))
return A->getAllocSizeArgs();
return std::make_pair(0, 0);
}
std::pair<unsigned, unsigned> AttributeSetNode::getVScaleRangeArgs() const {
if (auto A = findEnumAttribute(Attribute::VScaleRange))
return A->getVScaleRangeArgs();
return std::make_pair(0, 0);
}
std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
std::string Str;
for (iterator I = begin(), E = end(); I != E; ++I) {
if (I != begin())
Str += ' ';
Str += I->getAsString(InAttrGrp);
}
return Str;
}
//===----------------------------------------------------------------------===//
// AttributeListImpl Definition
//===----------------------------------------------------------------------===//
/// Map from AttributeList index to the internal array index. Adding one happens
/// to work, because -1 wraps around to 0.
static unsigned attrIdxToArrayIdx(unsigned Index) {
return Index + 1;
}
AttributeListImpl::AttributeListImpl(ArrayRef<AttributeSet> Sets)
: NumAttrSets(Sets.size()) {
assert(!Sets.empty() && "pointless AttributeListImpl");
// There's memory after the node where we can store the entries in.
llvm::copy(Sets, getTrailingObjects<AttributeSet>());
// Initialize AvailableFunctionAttrs and AvailableSomewhereAttrs
// summary bitsets.
for (const auto &I : Sets[attrIdxToArrayIdx(AttributeList::FunctionIndex)])
if (!I.isStringAttribute())
AvailableFunctionAttrs.addAttribute(I.getKindAsEnum());
for (const auto &Set : Sets)
for (const auto &I : Set)
if (!I.isStringAttribute())
AvailableSomewhereAttrs.addAttribute(I.getKindAsEnum());
}
void AttributeListImpl::Profile(FoldingSetNodeID &ID) const {
Profile(ID, makeArrayRef(begin(), end()));
}
void AttributeListImpl::Profile(FoldingSetNodeID &ID,
ArrayRef<AttributeSet> Sets) {
for (const auto &Set : Sets)
ID.AddPointer(Set.SetNode);
}
bool AttributeListImpl::hasAttrSomewhere(Attribute::AttrKind Kind,
unsigned *Index) const {
if (!AvailableSomewhereAttrs.hasAttribute(Kind))
return false;
if (Index) {
for (unsigned I = 0, E = NumAttrSets; I != E; ++I) {
if (begin()[I].hasAttribute(Kind)) {
*Index = I - 1;
break;
}
}
}
return true;
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void AttributeListImpl::dump() const {
AttributeList(const_cast<AttributeListImpl *>(this)).dump();
}
#endif
//===----------------------------------------------------------------------===//
// AttributeList Construction and Mutation Methods
//===----------------------------------------------------------------------===//
AttributeList AttributeList::getImpl(LLVMContext &C,
ArrayRef<AttributeSet> AttrSets) {
assert(!AttrSets.empty() && "pointless AttributeListImpl");
LLVMContextImpl *pImpl = C.pImpl;
FoldingSetNodeID ID;
AttributeListImpl::Profile(ID, AttrSets);
void *InsertPoint;
AttributeListImpl *PA =
pImpl->AttrsLists.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) {
// Coallocate entries after the AttributeListImpl itself.
void *Mem = pImpl->Alloc.Allocate(
AttributeListImpl::totalSizeToAlloc<AttributeSet>(AttrSets.size()),
alignof(AttributeListImpl));
PA = new (Mem) AttributeListImpl(AttrSets);
pImpl->AttrsLists.InsertNode(PA, InsertPoint);
}
// Return the AttributesList that we found or created.
return AttributeList(PA);
}
AttributeList
AttributeList::get(LLVMContext &C,
ArrayRef<std::pair<unsigned, Attribute>> Attrs) {
// If there are no attributes then return a null AttributesList pointer.
if (Attrs.empty())
return {};
assert(llvm::is_sorted(Attrs,
[](const std::pair<unsigned, Attribute> &LHS,
const std::pair<unsigned, Attribute> &RHS) {
return LHS.first < RHS.first;
}) &&
"Misordered Attributes list!");
assert(llvm::all_of(Attrs,
[](const std::pair<unsigned, Attribute> &Pair) {
return Pair.second.isValid();
}) &&
"Pointless attribute!");
// Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
// list.
SmallVector<std::pair<unsigned, AttributeSet>, 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 != E && I->first == Index) {
AttrVec.push_back(I->second);
++I;
}
AttrPairVec.emplace_back(Index, AttributeSet::get(C, AttrVec));
}
return get(C, AttrPairVec);
}
AttributeList
AttributeList::get(LLVMContext &C,
ArrayRef<std::pair<unsigned, AttributeSet>> Attrs) {
// If there are no attributes then return a null AttributesList pointer.
if (Attrs.empty())
return {};
assert(llvm::is_sorted(Attrs,
[](const std::pair<unsigned, AttributeSet> &LHS,
const std::pair<unsigned, AttributeSet> &RHS) {
return LHS.first < RHS.first;
}) &&
"Misordered Attributes list!");
assert(llvm::none_of(Attrs,
[](const std::pair<unsigned, AttributeSet> &Pair) {
return !Pair.second.hasAttributes();
}) &&
"Pointless attribute!");
unsigned MaxIndex = Attrs.back().first;
// If the MaxIndex is FunctionIndex and there are other indices in front
// of it, we need to use the largest of those to get the right size.
if (MaxIndex == FunctionIndex && Attrs.size() > 1)
MaxIndex = Attrs[Attrs.size() - 2].first;
SmallVector<AttributeSet, 4> AttrVec(attrIdxToArrayIdx(MaxIndex) + 1);
for (const auto &Pair : Attrs)
AttrVec[attrIdxToArrayIdx(Pair.first)] = Pair.second;
return getImpl(C, AttrVec);
}
AttributeList AttributeList::get(LLVMContext &C, AttributeSet FnAttrs,
AttributeSet RetAttrs,
ArrayRef<AttributeSet> ArgAttrs) {
// Scan from the end to find the last argument with attributes. Most
// arguments don't have attributes, so it's nice if we can have fewer unique
// AttributeListImpls by dropping empty attribute sets at the end of the list.
unsigned NumSets = 0;
for (size_t I = ArgAttrs.size(); I != 0; --I) {
if (ArgAttrs[I - 1].hasAttributes()) {
NumSets = I + 2;
break;
}
}
if (NumSets == 0) {
// Check function and return attributes if we didn't have argument
// attributes.
if (RetAttrs.hasAttributes())
NumSets = 2;
else if (FnAttrs.hasAttributes())
NumSets = 1;
}
// If all attribute sets were empty, we can use the empty attribute list.
if (NumSets == 0)
return {};
SmallVector<AttributeSet, 8> AttrSets;
AttrSets.reserve(NumSets);
// If we have any attributes, we always have function attributes.
AttrSets.push_back(FnAttrs);
if (NumSets > 1)
AttrSets.push_back(RetAttrs);
if (NumSets > 2) {
// Drop the empty argument attribute sets at the end.
ArgAttrs = ArgAttrs.take_front(NumSets - 2);
llvm::append_range(AttrSets, ArgAttrs);
}
return getImpl(C, AttrSets);
}
AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
const AttrBuilder &B) {
if (!B.hasAttributes())
return {};
Index = attrIdxToArrayIdx(Index);
SmallVector<AttributeSet, 8> AttrSets(Index + 1);
AttrSets[Index] = AttributeSet::get(C, B);
return getImpl(C, AttrSets);
}
AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
ArrayRef<Attribute::AttrKind> Kinds) {
SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
for (const auto K : Kinds)
Attrs.emplace_back(Index, Attribute::get(C, K));
return get(C, Attrs);
}
AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
ArrayRef<Attribute::AttrKind> Kinds,
ArrayRef<uint64_t> Values) {
assert(Kinds.size() == Values.size() && "Mismatched attribute values.");
SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
auto VI = Values.begin();
for (const auto K : Kinds)
Attrs.emplace_back(Index, Attribute::get(C, K, *VI++));
return get(C, Attrs);
}
AttributeList AttributeList::get(LLVMContext &C, unsigned Index,
ArrayRef<StringRef> Kinds) {
SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
for (const auto &K : Kinds)
Attrs.emplace_back(Index, Attribute::get(C, K));
return get(C, Attrs);
}
AttributeList AttributeList::get(LLVMContext &C,
ArrayRef<AttributeList> Attrs) {
if (Attrs.empty())
return {};
if (Attrs.size() == 1)
return Attrs[0];
unsigned MaxSize = 0;
for (const auto &List : Attrs)
MaxSize = std::max(MaxSize, List.getNumAttrSets());
// If every list was empty, there is no point in merging the lists.
if (MaxSize == 0)
return {};
SmallVector<AttributeSet, 8> NewAttrSets(MaxSize);
for (unsigned I = 0; I < MaxSize; ++I) {
AttrBuilder CurBuilder;
for (const auto &List : Attrs)
CurBuilder.merge(List.getAttributes(I - 1));
NewAttrSets[I] = AttributeSet::get(C, CurBuilder);
}
return getImpl(C, NewAttrSets);
}
AttributeList
AttributeList::addAttributeAtIndex(LLVMContext &C, unsigned Index,
Attribute::AttrKind Kind) const {
if (hasAttributeAtIndex(Index, Kind))
return *this;
AttributeSet Attrs = getAttributes(Index);
// TODO: Insert at correct position and avoid sort.
SmallVector<Attribute, 8> NewAttrs(Attrs.begin(), Attrs.end());
NewAttrs.push_back(Attribute::get(C, Kind));
return setAttributesAtIndex(C, Index, AttributeSet::get(C, NewAttrs));
}
AttributeList AttributeList::addAttributeAtIndex(LLVMContext &C, unsigned Index,
StringRef Kind,
StringRef Value) const {
AttrBuilder B;
B.addAttribute(Kind, Value);
return addAttributesAtIndex(C, Index, B);
}
AttributeList AttributeList::addAttributeAtIndex(LLVMContext &C, unsigned Index,
Attribute A) const {
AttrBuilder B;
B.addAttribute(A);
return addAttributesAtIndex(C, Index, B);
}
AttributeList AttributeList::setAttributesAtIndex(LLVMContext &C,
unsigned Index,
AttributeSet Attrs) const {
Index = attrIdxToArrayIdx(Index);
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
if (Index >= AttrSets.size())
AttrSets.resize(Index + 1);
AttrSets[Index] = Attrs;
return AttributeList::getImpl(C, AttrSets);
}
AttributeList AttributeList::addAttributesAtIndex(LLVMContext &C,
unsigned Index,
const AttrBuilder &B) const {
if (!B.hasAttributes())
return *this;
if (!pImpl)
return AttributeList::get(C, {{Index, AttributeSet::get(C, B)}});
#ifndef NDEBUG
// FIXME it is not obvious how this should work for alignment. For now, say
// we can't change a known alignment.
const MaybeAlign OldAlign = getAttributes(Index).getAlignment();
const MaybeAlign NewAlign = B.getAlignment();
assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
"Attempt to change alignment!");
#endif
AttrBuilder Merged(getAttributes(Index));
Merged.merge(B);
return setAttributesAtIndex(C, Index, AttributeSet::get(C, Merged));
}
AttributeList AttributeList::addParamAttribute(LLVMContext &C,
ArrayRef<unsigned> ArgNos,
Attribute A) const {
assert(llvm::is_sorted(ArgNos));
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
unsigned MaxIndex = attrIdxToArrayIdx(ArgNos.back() + FirstArgIndex);
if (MaxIndex >= AttrSets.size())
AttrSets.resize(MaxIndex + 1);
for (unsigned ArgNo : ArgNos) {
unsigned Index = attrIdxToArrayIdx(ArgNo + FirstArgIndex);
AttrBuilder B(AttrSets[Index]);
B.addAttribute(A);
AttrSets[Index] = AttributeSet::get(C, B);
}
return getImpl(C, AttrSets);
}
AttributeList
AttributeList::removeAttributeAtIndex(LLVMContext &C, unsigned Index,
Attribute::AttrKind Kind) const {
if (!hasAttributeAtIndex(Index, Kind))
return *this;
Index = attrIdxToArrayIdx(Index);
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
assert(Index < AttrSets.size());
AttrSets[Index] = AttrSets[Index].removeAttribute(C, Kind);
return getImpl(C, AttrSets);
}
AttributeList AttributeList::removeAttributeAtIndex(LLVMContext &C,
unsigned Index,
StringRef Kind) const {
if (!hasAttributeAtIndex(Index, Kind))
return *this;
Index = attrIdxToArrayIdx(Index);
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
assert(Index < AttrSets.size());
AttrSets[Index] = AttrSets[Index].removeAttribute(C, Kind);
return getImpl(C, AttrSets);
}
AttributeList
AttributeList::removeAttributesAtIndex(LLVMContext &C, unsigned Index,
const AttrBuilder &AttrsToRemove) const {
AttributeSet Attrs = getAttributes(Index);
AttributeSet NewAttrs = Attrs.removeAttributes(C, AttrsToRemove);
// If nothing was removed, return the original list.
if (Attrs == NewAttrs)
return *this;
return setAttributesAtIndex(C, Index, NewAttrs);
}
AttributeList
AttributeList::removeAttributesAtIndex(LLVMContext &C,
unsigned WithoutIndex) const {
if (!pImpl)
return {};
WithoutIndex = attrIdxToArrayIdx(WithoutIndex);
if (WithoutIndex >= getNumAttrSets())
return *this;
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
AttrSets[WithoutIndex] = AttributeSet();
return getImpl(C, AttrSets);
}
AttributeList AttributeList::addDereferenceableRetAttr(LLVMContext &C,
uint64_t Bytes) const {
AttrBuilder B;
B.addDereferenceableAttr(Bytes);
return addRetAttributes(C, B);
}
AttributeList AttributeList::addDereferenceableParamAttr(LLVMContext &C,
unsigned Index,
uint64_t Bytes) const {
AttrBuilder B;
B.addDereferenceableAttr(Bytes);
return addParamAttributes(C, Index, B);
}
AttributeList
AttributeList::addDereferenceableOrNullParamAttr(LLVMContext &C, unsigned Index,
uint64_t Bytes) const {
AttrBuilder B;
B.addDereferenceableOrNullAttr(Bytes);
return addParamAttributes(C, Index, B);
}
AttributeList
AttributeList::addAllocSizeParamAttr(LLVMContext &C, unsigned Index,
unsigned ElemSizeArg,
const Optional<unsigned> &NumElemsArg) {
AttrBuilder B;
B.addAllocSizeAttr(ElemSizeArg, NumElemsArg);
return addParamAttributes(C, Index, B);
}
//===----------------------------------------------------------------------===//
// AttributeList Accessor Methods
//===----------------------------------------------------------------------===//
AttributeSet AttributeList::getParamAttrs(unsigned ArgNo) const {
return getAttributes(ArgNo + FirstArgIndex);
}
AttributeSet AttributeList::getRetAttrs() const {
return getAttributes(ReturnIndex);
}
AttributeSet AttributeList::getFnAttrs() const {
return getAttributes(FunctionIndex);
}
bool AttributeList::hasAttributeAtIndex(unsigned Index,
Attribute::AttrKind Kind) const {
return getAttributes(Index).hasAttribute(Kind);
}
bool AttributeList::hasAttributeAtIndex(unsigned Index, StringRef Kind) const {
return getAttributes(Index).hasAttribute(Kind);
}
bool AttributeList::hasAttributesAtIndex(unsigned Index) const {
return getAttributes(Index).hasAttributes();
}
bool AttributeList::hasFnAttr(Attribute::AttrKind Kind) const {
return pImpl && pImpl->hasFnAttribute(Kind);
}
bool AttributeList::hasFnAttr(StringRef Kind) const {
return hasAttributeAtIndex(AttributeList::FunctionIndex, Kind);
}
bool AttributeList::hasAttrSomewhere(Attribute::AttrKind Attr,
unsigned *Index) const {
return pImpl && pImpl->hasAttrSomewhere(Attr, Index);
}
Attribute AttributeList::getAttributeAtIndex(unsigned Index,
Attribute::AttrKind Kind) const {
return getAttributes(Index).getAttribute(Kind);
}
Attribute AttributeList::getAttributeAtIndex(unsigned Index,
StringRef Kind) const {
return getAttributes(Index).getAttribute(Kind);
}
MaybeAlign AttributeList::getRetAlignment() const {
return getAttributes(ReturnIndex).getAlignment();
}
MaybeAlign AttributeList::getParamAlignment(unsigned ArgNo) const {
return getAttributes(ArgNo + FirstArgIndex).getAlignment();
}
MaybeAlign AttributeList::getParamStackAlignment(unsigned ArgNo) const {
return getAttributes(ArgNo + FirstArgIndex).getStackAlignment();
}
Type *AttributeList::getParamByValType(unsigned Index) const {
return getAttributes(Index+FirstArgIndex).getByValType();
}
Type *AttributeList::getParamStructRetType(unsigned Index) const {
return getAttributes(Index + FirstArgIndex).getStructRetType();
}
Type *AttributeList::getParamByRefType(unsigned Index) const {
return getAttributes(Index + FirstArgIndex).getByRefType();
}
Type *AttributeList::getParamPreallocatedType(unsigned Index) const {
return getAttributes(Index + FirstArgIndex).getPreallocatedType();
}
Type *AttributeList::getParamInAllocaType(unsigned Index) const {
return getAttributes(Index + FirstArgIndex).getInAllocaType();
}
Type *AttributeList::getParamElementType(unsigned Index) const {
return getAttributes(Index + FirstArgIndex).getElementType();
}
MaybeAlign AttributeList::getFnStackAlignment() const {
return getFnAttrs().getStackAlignment();
}
MaybeAlign AttributeList::getRetStackAlignment() const {
return getRetAttrs().getStackAlignment();
}
uint64_t AttributeList::getRetDereferenceableBytes() const {
return getRetAttrs().getDereferenceableBytes();
}
uint64_t AttributeList::getParamDereferenceableBytes(unsigned Index) const {
return getParamAttrs(Index).getDereferenceableBytes();
}
uint64_t AttributeList::getRetDereferenceableOrNullBytes() const {
return getRetAttrs().getDereferenceableOrNullBytes();
}
uint64_t
AttributeList::getParamDereferenceableOrNullBytes(unsigned Index) const {
return getParamAttrs(Index).getDereferenceableOrNullBytes();
}
std::string AttributeList::getAsString(unsigned Index, bool InAttrGrp) const {
return getAttributes(Index).getAsString(InAttrGrp);
}
AttributeSet AttributeList::getAttributes(unsigned Index) const {
Index = attrIdxToArrayIdx(Index);
if (!pImpl || Index >= getNumAttrSets())
return {};
return pImpl->begin()[Index];
}
bool AttributeList::hasParentContext(LLVMContext &C) const {
assert(!isEmpty() && "an empty attribute list has no parent context");
FoldingSetNodeID ID;
pImpl->Profile(ID);
void *Unused;
return C.pImpl->AttrsLists.FindNodeOrInsertPos(ID, Unused) == pImpl;
}
AttributeList::iterator AttributeList::begin() const {
return pImpl ? pImpl->begin() : nullptr;
}
AttributeList::iterator AttributeList::end() const {
return pImpl ? pImpl->end() : nullptr;
}
//===----------------------------------------------------------------------===//
// AttributeList Introspection Methods
//===----------------------------------------------------------------------===//
unsigned AttributeList::getNumAttrSets() const {
return pImpl ? pImpl->NumAttrSets : 0;
}
void AttributeList::print(raw_ostream &O) const {
O << "AttributeList[\n";
for (unsigned i : indexes()) {
if (!getAttributes(i).hasAttributes())
continue;
O << " { ";
switch (i) {
case AttrIndex::ReturnIndex:
O << "return";
break;
case AttrIndex::FunctionIndex:
O << "function";
break;
default:
O << "arg(" << i - AttrIndex::FirstArgIndex << ")";
}
O << " => " << getAsString(i) << " }\n";
}
O << "]\n";
}
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void AttributeList::dump() const { print(dbgs()); }
#endif
//===----------------------------------------------------------------------===//
// AttrBuilder Method Implementations
//===----------------------------------------------------------------------===//
// FIXME: Remove this ctor, use AttributeSet.
AttrBuilder::AttrBuilder(AttributeList AL, unsigned Index) {
AttributeSet AS = AL.getAttributes(Index);
for (const auto &A : AS)
addAttribute(A);
}
AttrBuilder::AttrBuilder(AttributeSet AS) {
for (const auto &A : AS)
addAttribute(A);
}
void AttrBuilder::clear() {
Attrs.reset();
TargetDepAttrs.clear();
IntAttrs = {};
TypeAttrs = {};
}
Optional<unsigned>
AttrBuilder::kindToIntIndex(Attribute::AttrKind Kind) const {
if (Attribute::isIntAttrKind(Kind))
return Kind - Attribute::FirstIntAttr;
return None;
}
Optional<unsigned>
AttrBuilder::kindToTypeIndex(Attribute::AttrKind Kind) const {
if (Attribute::isTypeAttrKind(Kind))
return Kind - Attribute::FirstTypeAttr;
return None;
}
AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
if (Attr.isStringAttribute()) {
addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
return *this;
}
Attribute::AttrKind Kind = Attr.getKindAsEnum();
Attrs[Kind] = true;
if (Optional<unsigned> TypeIndex = kindToTypeIndex(Kind))
TypeAttrs[*TypeIndex] = Attr.getValueAsType();
else if (Optional<unsigned> IntIndex = kindToIntIndex(Kind))
IntAttrs[*IntIndex] = Attr.getValueAsInt();
return *this;
}
AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
TargetDepAttrs[A] = V;
return *this;
}
AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
Attrs[Val] = false;
if (Optional<unsigned> TypeIndex = kindToTypeIndex(Val))
TypeAttrs[*TypeIndex] = nullptr;
else if (Optional<unsigned> IntIndex = kindToIntIndex(Val))
IntAttrs[*IntIndex] = 0;
return *this;
}
AttrBuilder &AttrBuilder::removeAttributes(AttributeList A, uint64_t Index) {
remove(A.getAttributes(Index));
return *this;
}
AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
TargetDepAttrs.erase(A);
return *this;
}
uint64_t AttrBuilder::getRawIntAttr(Attribute::AttrKind Kind) const {
Optional<unsigned> IntIndex = kindToIntIndex(Kind);
assert(IntIndex && "Not an int attribute");
return IntAttrs[*IntIndex];
}
AttrBuilder &AttrBuilder::addRawIntAttr(Attribute::AttrKind Kind,
uint64_t Value) {
Optional<unsigned> IntIndex = kindToIntIndex(Kind);
assert(IntIndex && "Not an int attribute");
assert(Value && "Value cannot be zero");
Attrs[Kind] = true;
IntAttrs[*IntIndex] = Value;
return *this;
}
std::pair<unsigned, Optional<unsigned>> AttrBuilder::getAllocSizeArgs() const {
return unpackAllocSizeArgs(getRawIntAttr(Attribute::AllocSize));
}
std::pair<unsigned, unsigned> AttrBuilder::getVScaleRangeArgs() const {
return unpackVScaleRangeArgs(getRawIntAttr(Attribute::VScaleRange));
}
AttrBuilder &AttrBuilder::addAlignmentAttr(MaybeAlign Align) {
if (!Align)
return *this;
assert(*Align <= llvm::Value::MaximumAlignment && "Alignment too large.");
return addRawIntAttr(Attribute::Alignment, Align->value());
}
AttrBuilder &AttrBuilder::addStackAlignmentAttr(MaybeAlign Align) {
// Default alignment, allow the target to define how to align it.
if (!Align)
return *this;
assert(*Align <= 0x100 && "Alignment too large.");
return addRawIntAttr(Attribute::StackAlignment, Align->value());
}
AttrBuilder &AttrBuilder::addDereferenceableAttr(uint64_t Bytes) {
if (Bytes == 0) return *this;
return addRawIntAttr(Attribute::Dereferenceable, Bytes);
}
AttrBuilder &AttrBuilder::addDereferenceableOrNullAttr(uint64_t Bytes) {
if (Bytes == 0)
return *this;
return addRawIntAttr(Attribute::DereferenceableOrNull, Bytes);
}
AttrBuilder &AttrBuilder::addAllocSizeAttr(unsigned ElemSize,
const Optional<unsigned> &NumElems) {
return addAllocSizeAttrFromRawRepr(packAllocSizeArgs(ElemSize, NumElems));
}
AttrBuilder &AttrBuilder::addAllocSizeAttrFromRawRepr(uint64_t RawArgs) {
// (0, 0) is our "not present" value, so we need to check for it here.
assert(RawArgs && "Invalid allocsize arguments -- given allocsize(0, 0)");
return addRawIntAttr(Attribute::AllocSize, RawArgs);
}
AttrBuilder &AttrBuilder::addVScaleRangeAttr(unsigned MinValue,
unsigned MaxValue) {
return addVScaleRangeAttrFromRawRepr(packVScaleRangeArgs(MinValue, MaxValue));
}
AttrBuilder &AttrBuilder::addVScaleRangeAttrFromRawRepr(uint64_t RawArgs) {
// (0, 0) is not present hence ignore this case
if (RawArgs == 0)
return *this;
return addRawIntAttr(Attribute::VScaleRange, RawArgs);
}
Type *AttrBuilder::getTypeAttr(Attribute::AttrKind Kind) const {
Optional<unsigned> TypeIndex = kindToTypeIndex(Kind);
assert(TypeIndex && "Not a type attribute");
return TypeAttrs[*TypeIndex];
}
AttrBuilder &AttrBuilder::addTypeAttr(Attribute::AttrKind Kind, Type *Ty) {
Optional<unsigned> TypeIndex = kindToTypeIndex(Kind);
assert(TypeIndex && "Not a type attribute");
Attrs[Kind] = true;
TypeAttrs[*TypeIndex] = Ty;
return *this;
}
AttrBuilder &AttrBuilder::addByValAttr(Type *Ty) {
return addTypeAttr(Attribute::ByVal, Ty);
}
AttrBuilder &AttrBuilder::addStructRetAttr(Type *Ty) {
return addTypeAttr(Attribute::StructRet, Ty);
}
AttrBuilder &AttrBuilder::addByRefAttr(Type *Ty) {
return addTypeAttr(Attribute::ByRef, Ty);
}
AttrBuilder &AttrBuilder::addPreallocatedAttr(Type *Ty) {
return addTypeAttr(Attribute::Preallocated, Ty);
}
AttrBuilder &AttrBuilder::addInAllocaAttr(Type *Ty) {
return addTypeAttr(Attribute::InAlloca, Ty);
}
AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
// FIXME: What if both have an int/type attribute, but they don't match?!
for (unsigned Index = 0; Index < Attribute::NumIntAttrKinds; ++Index)
if (!IntAttrs[Index])
IntAttrs[Index] = B.IntAttrs[Index];
for (unsigned Index = 0; Index < Attribute::NumTypeAttrKinds; ++Index)
if (!TypeAttrs[Index])
TypeAttrs[Index] = B.TypeAttrs[Index];
Attrs |= B.Attrs;
for (const auto &I : B.td_attrs())
TargetDepAttrs[I.first] = I.second;
return *this;
}
AttrBuilder &AttrBuilder::remove(const AttrBuilder &B) {
// FIXME: What if both have an int/type attribute, but they don't match?!
for (unsigned Index = 0; Index < Attribute::NumIntAttrKinds; ++Index)
if (B.IntAttrs[Index])
IntAttrs[Index] = 0;
for (unsigned Index = 0; Index < Attribute::NumTypeAttrKinds; ++Index)
if (B.TypeAttrs[Index])
TypeAttrs[Index] = nullptr;
Attrs &= ~B.Attrs;
for (const auto &I : B.td_attrs())
TargetDepAttrs.erase(I.first);
return *this;
}
bool AttrBuilder::overlaps(const AttrBuilder &B) const {
// First check if any of the target independent attributes overlap.
if ((Attrs & B.Attrs).any())
return true;
// Then check if any target dependent ones do.
for (const auto &I : td_attrs())
if (B.contains(I.first))
return true;
return false;
}
bool AttrBuilder::contains(StringRef A) const {
return TargetDepAttrs.find(A) != TargetDepAttrs.end();
}
bool AttrBuilder::hasAttributes() const {
return !Attrs.none() || !TargetDepAttrs.empty();
}
bool AttrBuilder::hasAttributes(AttributeList AL, uint64_t Index) const {
AttributeSet AS = AL.getAttributes(Index);
for (const auto &Attr : AS) {
if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
if (contains(Attr.getKindAsEnum()))
return true;
} else {
assert(Attr.isStringAttribute() && "Invalid attribute kind!");
return contains(Attr.getKindAsString());
}
}
return false;
}
bool AttrBuilder::hasAlignmentAttr() const {
return getRawIntAttr(Attribute::Alignment) != 0;
}
bool AttrBuilder::operator==(const AttrBuilder &B) const {
if (Attrs != B.Attrs)
return false;
for (const auto &TDA : TargetDepAttrs)
if (B.TargetDepAttrs.find(TDA.first) == B.TargetDepAttrs.end())
return false;
return IntAttrs == B.IntAttrs && TypeAttrs == B.TypeAttrs;
}
//===----------------------------------------------------------------------===//
// AttributeFuncs Function Defintions
//===----------------------------------------------------------------------===//
/// Which attributes cannot be applied to a type.
AttrBuilder 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::Nest)
.addAttribute(Attribute::NoAlias)
.addAttribute(Attribute::NoCapture)
.addAttribute(Attribute::NonNull)
.addAttribute(Attribute::ReadNone)
.addAttribute(Attribute::ReadOnly)
.addAttribute(Attribute::SwiftError)
.addAlignmentAttr(1) // the int here is ignored
.addDereferenceableAttr(1) // the int here is ignored
.addDereferenceableOrNullAttr(1) // the int here is ignored
.addPreallocatedAttr(Ty)
.addInAllocaAttr(Ty)
.addByValAttr(Ty)
.addStructRetAttr(Ty)
.addByRefAttr(Ty)
.addTypeAttr(Attribute::ElementType, Ty);
// Some attributes can apply to all "values" but there are no `void` values.
if (Ty->isVoidTy())
Incompatible.addAttribute(Attribute::NoUndef);
return Incompatible;
}
AttrBuilder AttributeFuncs::getUBImplyingAttributes() {
AttrBuilder B;
B.addAttribute(Attribute::NoUndef);
B.addDereferenceableAttr(1);
B.addDereferenceableOrNullAttr(1);
return B;
}
template<typename AttrClass>
static bool isEqual(const Function &Caller, const Function &Callee) {
return Caller.getFnAttribute(AttrClass::getKind()) ==
Callee.getFnAttribute(AttrClass::getKind());
}
/// Compute the logical AND of the attributes of the caller and the
/// callee.
///
/// This function sets the caller's attribute to false if the callee's attribute
/// is false.
template<typename AttrClass>
static void setAND(Function &Caller, const Function &Callee) {
if (AttrClass::isSet(Caller, AttrClass::getKind()) &&
!AttrClass::isSet(Callee, AttrClass::getKind()))
AttrClass::set(Caller, AttrClass::getKind(), false);
}
/// Compute the logical OR of the attributes of the caller and the
/// callee.
///
/// This function sets the caller's attribute to true if the callee's attribute
/// is true.
template<typename AttrClass>
static void setOR(Function &Caller, const Function &Callee) {
if (!AttrClass::isSet(Caller, AttrClass::getKind()) &&
AttrClass::isSet(Callee, AttrClass::getKind()))
AttrClass::set(Caller, AttrClass::getKind(), true);
}
/// If the inlined function had a higher stack protection level than the
/// calling function, then bump up the caller's stack protection level.
static void adjustCallerSSPLevel(Function &Caller, const Function &Callee) {
// If upgrading the SSP attribute, clear out the old SSP Attributes first.
// Having multiple SSP attributes doesn't actually hurt, but it adds useless
// clutter to the IR.
AttrBuilder OldSSPAttr;
OldSSPAttr.addAttribute(Attribute::StackProtect)
.addAttribute(Attribute::StackProtectStrong)
.addAttribute(Attribute::StackProtectReq);
if (Callee.hasFnAttribute(Attribute::StackProtectReq)) {
Caller.removeFnAttrs(OldSSPAttr);
Caller.addFnAttr(Attribute::StackProtectReq);
} else if (Callee.hasFnAttribute(Attribute::StackProtectStrong) &&
!Caller.hasFnAttribute(Attribute::StackProtectReq)) {
Caller.removeFnAttrs(OldSSPAttr);
Caller.addFnAttr(Attribute::StackProtectStrong);
} else if (Callee.hasFnAttribute(Attribute::StackProtect) &&
!Caller.hasFnAttribute(Attribute::StackProtectReq) &&
!Caller.hasFnAttribute(Attribute::StackProtectStrong))
Caller.addFnAttr(Attribute::StackProtect);
}
/// If the inlined function required stack probes, then ensure that
/// the calling function has those too.
static void adjustCallerStackProbes(Function &Caller, const Function &Callee) {
if (!Caller.hasFnAttribute("probe-stack") &&
Callee.hasFnAttribute("probe-stack")) {
Caller.addFnAttr(Callee.getFnAttribute("probe-stack"));
}
}
/// If the inlined function defines the size of guard region
/// on the stack, then ensure that the calling function defines a guard region
/// that is no larger.
static void
adjustCallerStackProbeSize(Function &Caller, const Function &Callee) {
Attribute CalleeAttr = Callee.getFnAttribute("stack-probe-size");
if (CalleeAttr.isValid()) {
Attribute CallerAttr = Caller.getFnAttribute("stack-probe-size");
if (CallerAttr.isValid()) {
uint64_t CallerStackProbeSize, CalleeStackProbeSize;
CallerAttr.getValueAsString().getAsInteger(0, CallerStackProbeSize);
CalleeAttr.getValueAsString().getAsInteger(0, CalleeStackProbeSize);
if (CallerStackProbeSize > CalleeStackProbeSize) {
Caller.addFnAttr(CalleeAttr);
}
} else {
Caller.addFnAttr(CalleeAttr);
}
}
}
/// If the inlined function defines a min legal vector width, then ensure
/// the calling function has the same or larger min legal vector width. If the
/// caller has the attribute, but the callee doesn't, we need to remove the
/// attribute from the caller since we can't make any guarantees about the
/// caller's requirements.
/// This function is called after the inlining decision has been made so we have
/// to merge the attribute this way. Heuristics that would use
/// min-legal-vector-width to determine inline compatibility would need to be
/// handled as part of inline cost analysis.
static void
adjustMinLegalVectorWidth(Function &Caller, const Function &Callee) {
Attribute CallerAttr = Caller.getFnAttribute("min-legal-vector-width");
if (CallerAttr.isValid()) {
Attribute CalleeAttr = Callee.getFnAttribute("min-legal-vector-width");
if (CalleeAttr.isValid()) {
uint64_t CallerVectorWidth, CalleeVectorWidth;
CallerAttr.getValueAsString().getAsInteger(0, CallerVectorWidth);
CalleeAttr.getValueAsString().getAsInteger(0, CalleeVectorWidth);
if (CallerVectorWidth < CalleeVectorWidth)
Caller.addFnAttr(CalleeAttr);
} else {
// If the callee doesn't have the attribute then we don't know anything
// and must drop the attribute from the caller.
Caller.removeFnAttr("min-legal-vector-width");
}
}
}
/// If the inlined function has null_pointer_is_valid attribute,
/// set this attribute in the caller post inlining.
static void
adjustNullPointerValidAttr(Function &Caller, const Function &Callee) {
if (Callee.nullPointerIsDefined() && !Caller.nullPointerIsDefined()) {
Caller.addFnAttr(Attribute::NullPointerIsValid);
}
}
struct EnumAttr {
static bool isSet(const Function &Fn,
Attribute::AttrKind Kind) {
return Fn.hasFnAttribute(Kind);
}
static void set(Function &Fn,
Attribute::AttrKind Kind, bool Val) {
if (Val)
Fn.addFnAttr(Kind);
else
Fn.removeFnAttr(Kind);
}
};
struct StrBoolAttr {
static bool isSet(const Function &Fn,
StringRef Kind) {
auto A = Fn.getFnAttribute(Kind);
return A.getValueAsString().equals("true");
}
static void set(Function &Fn,
StringRef Kind, bool Val) {
Fn.addFnAttr(Kind, Val ? "true" : "false");
}
};
#define GET_ATTR_NAMES
#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME) \
struct ENUM_NAME##Attr : EnumAttr { \
static enum Attribute::AttrKind getKind() { \
return llvm::Attribute::ENUM_NAME; \
} \
};
#define ATTRIBUTE_STRBOOL(ENUM_NAME, DISPLAY_NAME) \
struct ENUM_NAME##Attr : StrBoolAttr { \
static StringRef getKind() { return #DISPLAY_NAME; } \
};
#include "llvm/IR/Attributes.inc"
#define GET_ATTR_COMPAT_FUNC
#include "llvm/IR/Attributes.inc"
bool AttributeFuncs::areInlineCompatible(const Function &Caller,
const Function &Callee) {
return hasCompatibleFnAttrs(Caller, Callee);
}
bool AttributeFuncs::areOutlineCompatible(const Function &A,
const Function &B) {
return hasCompatibleFnAttrs(A, B);
}
void AttributeFuncs::mergeAttributesForInlining(Function &Caller,
const Function &Callee) {
mergeFnAttrs(Caller, Callee);
}
void AttributeFuncs::mergeAttributesForOutlining(Function &Base,
const Function &ToMerge) {
// We merge functions so that they meet the most general case.
// For example, if the NoNansFPMathAttr is set in one function, but not in
// the other, in the merged function we can say that the NoNansFPMathAttr
// is not set.
// However if we have the SpeculativeLoadHardeningAttr set true in one
// function, but not the other, we make sure that the function retains
// that aspect in the merged function.
mergeFnAttrs(Base, ToMerge);
}
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