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https://github.com/RPCS3/llvm-mirror.git
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9b63996812
I think byval/sret and the others are close to being able to rip out the code to support the missing type case. A lot of this code is shared with inalloca, so catch this up to the others so that can happen.
334 lines
11 KiB
C++
334 lines
11 KiB
C++
//===- AttributeImpl.h - Attribute Internals --------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file defines various helper methods and classes used by
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/// LLVMContextImpl for creating and managing attributes.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_IR_ATTRIBUTEIMPL_H
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#define LLVM_LIB_IR_ATTRIBUTEIMPL_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/Attributes.h"
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#include "llvm/Support/TrailingObjects.h"
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include <utility>
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namespace llvm {
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class LLVMContext;
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class Type;
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//===----------------------------------------------------------------------===//
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/// \class
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/// This class represents a single, uniqued attribute. That attribute
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/// could be a single enum, a tuple, or a string.
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class AttributeImpl : public FoldingSetNode {
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unsigned char KindID; ///< Holds the AttrEntryKind of the attribute
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protected:
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enum AttrEntryKind {
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EnumAttrEntry,
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IntAttrEntry,
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StringAttrEntry,
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TypeAttrEntry,
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};
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AttributeImpl(AttrEntryKind KindID) : KindID(KindID) {}
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public:
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// AttributesImpl is uniqued, these should not be available.
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AttributeImpl(const AttributeImpl &) = delete;
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AttributeImpl &operator=(const AttributeImpl &) = delete;
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bool isEnumAttribute() const { return KindID == EnumAttrEntry; }
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bool isIntAttribute() const { return KindID == IntAttrEntry; }
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bool isStringAttribute() const { return KindID == StringAttrEntry; }
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bool isTypeAttribute() const { return KindID == TypeAttrEntry; }
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bool hasAttribute(Attribute::AttrKind A) const;
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bool hasAttribute(StringRef Kind) const;
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Attribute::AttrKind getKindAsEnum() const;
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uint64_t getValueAsInt() const;
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StringRef getKindAsString() const;
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StringRef getValueAsString() const;
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Type *getValueAsType() const;
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/// Used when sorting the attributes.
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bool operator<(const AttributeImpl &AI) const;
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void Profile(FoldingSetNodeID &ID) const {
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if (isEnumAttribute())
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Profile(ID, getKindAsEnum(), static_cast<uint64_t>(0));
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else if (isIntAttribute())
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Profile(ID, getKindAsEnum(), getValueAsInt());
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else if (isStringAttribute())
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Profile(ID, getKindAsString(), getValueAsString());
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else
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Profile(ID, getKindAsEnum(), getValueAsType());
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}
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static void Profile(FoldingSetNodeID &ID, Attribute::AttrKind Kind,
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uint64_t Val) {
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ID.AddInteger(Kind);
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if (Val) ID.AddInteger(Val);
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}
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static void Profile(FoldingSetNodeID &ID, StringRef Kind, StringRef Values) {
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ID.AddString(Kind);
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if (!Values.empty()) ID.AddString(Values);
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}
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static void Profile(FoldingSetNodeID &ID, Attribute::AttrKind Kind,
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Type *Ty) {
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ID.AddInteger(Kind);
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ID.AddPointer(Ty);
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}
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};
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static_assert(std::is_trivially_destructible<AttributeImpl>::value,
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"AttributeImpl should be trivially destructible");
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//===----------------------------------------------------------------------===//
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/// \class
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/// A set of classes that contain the value of the
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/// attribute object. There are three main categories: enum attribute entries,
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/// represented by Attribute::AttrKind; alignment attribute entries; and string
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/// attribute enties, which are for target-dependent attributes.
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class EnumAttributeImpl : public AttributeImpl {
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Attribute::AttrKind Kind;
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protected:
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EnumAttributeImpl(AttrEntryKind ID, Attribute::AttrKind Kind)
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: AttributeImpl(ID), Kind(Kind) {}
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public:
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EnumAttributeImpl(Attribute::AttrKind Kind)
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: AttributeImpl(EnumAttrEntry), Kind(Kind) {
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assert(Kind != Attribute::AttrKind::None &&
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"Can't create a None attribute!");
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}
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Attribute::AttrKind getEnumKind() const { return Kind; }
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};
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class IntAttributeImpl : public EnumAttributeImpl {
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uint64_t Val;
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public:
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IntAttributeImpl(Attribute::AttrKind Kind, uint64_t Val)
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: EnumAttributeImpl(IntAttrEntry, Kind), Val(Val) {
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assert(Attribute::doesAttrKindHaveArgument(Kind) &&
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"Wrong kind for int attribute!");
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}
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uint64_t getValue() const { return Val; }
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};
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class StringAttributeImpl final
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: public AttributeImpl,
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private TrailingObjects<StringAttributeImpl, char> {
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friend TrailingObjects;
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unsigned KindSize;
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unsigned ValSize;
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size_t numTrailingObjects(OverloadToken<char>) const {
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return KindSize + 1 + ValSize + 1;
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}
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public:
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StringAttributeImpl(StringRef Kind, StringRef Val = StringRef())
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: AttributeImpl(StringAttrEntry), KindSize(Kind.size()),
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ValSize(Val.size()) {
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char *TrailingString = getTrailingObjects<char>();
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// Some users rely on zero-termination.
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llvm::copy(Kind, TrailingString);
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TrailingString[KindSize] = '\0';
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llvm::copy(Val, &TrailingString[KindSize + 1]);
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TrailingString[KindSize + 1 + ValSize] = '\0';
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}
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StringRef getStringKind() const {
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return StringRef(getTrailingObjects<char>(), KindSize);
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}
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StringRef getStringValue() const {
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return StringRef(getTrailingObjects<char>() + KindSize + 1, ValSize);
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}
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static size_t totalSizeToAlloc(StringRef Kind, StringRef Val) {
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return TrailingObjects::totalSizeToAlloc<char>(Kind.size() + 1 +
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Val.size() + 1);
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}
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};
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class TypeAttributeImpl : public EnumAttributeImpl {
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Type *Ty;
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public:
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TypeAttributeImpl(Attribute::AttrKind Kind, Type *Ty)
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: EnumAttributeImpl(TypeAttrEntry, Kind), Ty(Ty) {}
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Type *getTypeValue() const { return Ty; }
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};
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class AttributeBitSet {
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/// Bitset with a bit for each available attribute Attribute::AttrKind.
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uint8_t AvailableAttrs[12] = {};
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static_assert(Attribute::EndAttrKinds <= sizeof(AvailableAttrs) * CHAR_BIT,
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"Too many attributes");
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public:
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bool hasAttribute(Attribute::AttrKind Kind) const {
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return AvailableAttrs[Kind / 8] & (1 << (Kind % 8));
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}
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void addAttribute(Attribute::AttrKind Kind) {
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AvailableAttrs[Kind / 8] |= 1 << (Kind % 8);
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}
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};
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//===----------------------------------------------------------------------===//
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/// \class
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/// This class represents a group of attributes that apply to one
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/// element: function, return type, or parameter.
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class AttributeSetNode final
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: public FoldingSetNode,
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private TrailingObjects<AttributeSetNode, Attribute> {
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friend TrailingObjects;
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unsigned NumAttrs; ///< Number of attributes in this node.
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AttributeBitSet AvailableAttrs; ///< Available enum attributes.
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DenseMap<StringRef, Attribute> StringAttrs;
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AttributeSetNode(ArrayRef<Attribute> Attrs);
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static AttributeSetNode *getSorted(LLVMContext &C,
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ArrayRef<Attribute> SortedAttrs);
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Optional<Attribute> findEnumAttribute(Attribute::AttrKind Kind) const;
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public:
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// AttributesSetNode is uniqued, these should not be available.
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AttributeSetNode(const AttributeSetNode &) = delete;
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AttributeSetNode &operator=(const AttributeSetNode &) = delete;
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void operator delete(void *p) { ::operator delete(p); }
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static AttributeSetNode *get(LLVMContext &C, const AttrBuilder &B);
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static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
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/// Return the number of attributes this AttributeList contains.
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unsigned getNumAttributes() const { return NumAttrs; }
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bool hasAttribute(Attribute::AttrKind Kind) const {
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return AvailableAttrs.hasAttribute(Kind);
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}
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bool hasAttribute(StringRef Kind) const;
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bool hasAttributes() const { return NumAttrs != 0; }
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Attribute getAttribute(Attribute::AttrKind Kind) const;
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Attribute getAttribute(StringRef Kind) const;
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MaybeAlign getAlignment() const;
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MaybeAlign getStackAlignment() const;
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uint64_t getDereferenceableBytes() const;
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uint64_t getDereferenceableOrNullBytes() const;
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std::pair<unsigned, Optional<unsigned>> getAllocSizeArgs() const;
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std::pair<unsigned, unsigned> getVScaleRangeArgs() const;
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std::string getAsString(bool InAttrGrp) const;
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Type *getByValType() const;
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Type *getStructRetType() const;
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Type *getByRefType() const;
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Type *getPreallocatedType() const;
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Type *getInAllocaType() const;
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using iterator = const Attribute *;
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iterator begin() const { return getTrailingObjects<Attribute>(); }
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iterator end() const { return begin() + NumAttrs; }
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void Profile(FoldingSetNodeID &ID) const {
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Profile(ID, makeArrayRef(begin(), end()));
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}
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static void Profile(FoldingSetNodeID &ID, ArrayRef<Attribute> AttrList) {
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for (const auto &Attr : AttrList)
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Attr.Profile(ID);
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}
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};
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//===----------------------------------------------------------------------===//
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/// \class
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/// This class represents a set of attributes that apply to the function,
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/// return type, and parameters.
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class AttributeListImpl final
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: public FoldingSetNode,
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private TrailingObjects<AttributeListImpl, AttributeSet> {
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friend class AttributeList;
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friend TrailingObjects;
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private:
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unsigned NumAttrSets; ///< Number of entries in this set.
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/// Available enum function attributes.
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AttributeBitSet AvailableFunctionAttrs;
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/// Union of enum attributes available at any index.
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AttributeBitSet AvailableSomewhereAttrs;
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// Helper fn for TrailingObjects class.
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size_t numTrailingObjects(OverloadToken<AttributeSet>) { return NumAttrSets; }
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public:
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AttributeListImpl(ArrayRef<AttributeSet> Sets);
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// AttributesSetImpt is uniqued, these should not be available.
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AttributeListImpl(const AttributeListImpl &) = delete;
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AttributeListImpl &operator=(const AttributeListImpl &) = delete;
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/// Return true if the AttributeSet or the FunctionIndex has an
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/// enum attribute of the given kind.
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bool hasFnAttribute(Attribute::AttrKind Kind) const {
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return AvailableFunctionAttrs.hasAttribute(Kind);
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}
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/// Return true if the specified attribute is set for at least one
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/// parameter or for the return value. If Index is not nullptr, the index
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/// of a parameter with the specified attribute is provided.
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bool hasAttrSomewhere(Attribute::AttrKind Kind,
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unsigned *Index = nullptr) const;
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using iterator = const AttributeSet *;
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iterator begin() const { return getTrailingObjects<AttributeSet>(); }
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iterator end() const { return begin() + NumAttrSets; }
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void Profile(FoldingSetNodeID &ID) const;
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static void Profile(FoldingSetNodeID &ID, ArrayRef<AttributeSet> Nodes);
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void dump() const;
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};
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static_assert(std::is_trivially_destructible<AttributeListImpl>::value,
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"AttributeListImpl should be trivially destructible");
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} // end namespace llvm
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#endif // LLVM_LIB_IR_ATTRIBUTEIMPL_H
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