mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
Adds static_asserts to ensure alignment of concatenated objects is correct, and fixes them where they are not. Also changes the definition of AlignOf to use constexpr, except on MSVC, to avoid enum comparison warnings from GCC. (There's not too much of this in llvm itself, most of the fun is in clang). This seems to make LLVM actually work without Bus Error on 32bit sparc. Differential Revision: http://reviews.llvm.org/D10271 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239872 91177308-0d34-0410-b5e6-96231b3b80d8
283 lines
9.6 KiB
C++
283 lines
9.6 KiB
C++
//===-- AttributeImpl.h - Attribute Internals -------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief 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/FoldingSet.h"
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#include "llvm/IR/Attributes.h"
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#include <string>
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namespace llvm {
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class Constant;
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class LLVMContext;
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//===----------------------------------------------------------------------===//
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/// \class
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/// \brief 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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// AttributesImpl is uniqued, these should not be publicly available.
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void operator=(const AttributeImpl &) = delete;
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AttributeImpl(const AttributeImpl &) = delete;
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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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};
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AttributeImpl(AttrEntryKind KindID) : KindID(KindID) {}
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public:
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virtual ~AttributeImpl();
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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 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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/// \brief 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(), 0);
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else if (isIntAttribute())
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Profile(ID, getKindAsEnum(), getValueAsInt());
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else
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Profile(ID, getKindAsString(), getValueAsString());
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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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// FIXME: Remove this!
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static uint64_t getAttrMask(Attribute::AttrKind Val);
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};
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//===----------------------------------------------------------------------===//
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/// \class
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/// \brief 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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virtual void anchor();
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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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Attribute::AttrKind getEnumKind() const { return Kind; }
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};
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class IntAttributeImpl : public EnumAttributeImpl {
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void anchor() override;
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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((Kind == Attribute::Alignment || Kind == Attribute::StackAlignment ||
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Kind == Attribute::Dereferenceable ||
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Kind == Attribute::DereferenceableOrNull) &&
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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 : public AttributeImpl {
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virtual void anchor();
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std::string Kind;
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std::string Val;
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public:
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StringAttributeImpl(StringRef Kind, StringRef Val = StringRef())
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: AttributeImpl(StringAttrEntry), Kind(Kind), Val(Val) {}
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StringRef getStringKind() const { return Kind; }
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StringRef getStringValue() const { return Val; }
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};
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//===----------------------------------------------------------------------===//
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/// \class
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/// \brief 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 : public FoldingSetNode {
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unsigned NumAttrs; ///< Number of attributes in this node.
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AttributeSetNode(ArrayRef<Attribute> Attrs) : NumAttrs(Attrs.size()) {
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// There's memory after the node where we can store the entries in.
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std::copy(Attrs.begin(), Attrs.end(),
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reinterpret_cast<Attribute *>(this + 1));
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}
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// AttributesSetNode is uniqued, these should not be publicly available.
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void operator=(const AttributeSetNode &) = delete;
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AttributeSetNode(const AttributeSetNode &) = delete;
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public:
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static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
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bool hasAttribute(Attribute::AttrKind Kind) const;
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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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unsigned getAlignment() const;
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unsigned getStackAlignment() const;
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uint64_t getDereferenceableBytes() const;
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uint64_t getDereferenceableOrNullBytes() const;
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std::string getAsString(bool InAttrGrp) const;
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typedef const Attribute *iterator;
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iterator begin() const { return reinterpret_cast<iterator>(this + 1); }
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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 (unsigned I = 0, E = AttrList.size(); I != E; ++I)
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AttrList[I].Profile(ID);
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}
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};
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static_assert(AlignOf<AttributeSetNode>::Alignment >=
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AlignOf<Attribute>::Alignment,
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"Alignment sufficient for objects appended to AttributeSetNode");
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//===----------------------------------------------------------------------===//
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/// \class
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/// \brief 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 AttributeSetImpl : public FoldingSetNode {
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friend class AttributeSet;
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public:
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typedef std::pair<unsigned, AttributeSetNode*> IndexAttrPair;
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private:
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LLVMContext &Context;
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unsigned NumAttrs; ///< Number of entries in this set.
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/// \brief Return a pointer to the IndexAttrPair for the specified slot.
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const IndexAttrPair *getNode(unsigned Slot) const {
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return reinterpret_cast<const IndexAttrPair *>(this + 1) + Slot;
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}
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// AttributesSet is uniqued, these should not be publicly available.
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void operator=(const AttributeSetImpl &) = delete;
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AttributeSetImpl(const AttributeSetImpl &) = delete;
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public:
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AttributeSetImpl(LLVMContext &C,
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ArrayRef<std::pair<unsigned, AttributeSetNode *> > Attrs)
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: Context(C), NumAttrs(Attrs.size()) {
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#ifndef NDEBUG
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if (Attrs.size() >= 2) {
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for (const std::pair<unsigned, AttributeSetNode *> *i = Attrs.begin() + 1,
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*e = Attrs.end();
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i != e; ++i) {
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assert((i-1)->first <= i->first && "Attribute set not ordered!");
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}
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}
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#endif
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// There's memory after the node where we can store the entries in.
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std::copy(Attrs.begin(), Attrs.end(),
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reinterpret_cast<IndexAttrPair *>(this + 1));
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}
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/// \brief Get the context that created this AttributeSetImpl.
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LLVMContext &getContext() { return Context; }
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/// \brief Return the number of attributes this AttributeSet contains.
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unsigned getNumAttributes() const { return NumAttrs; }
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/// \brief Get the index of the given "slot" in the AttrNodes list. This index
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/// is the index of the return, parameter, or function object that the
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/// attributes are applied to, not the index into the AttrNodes list where the
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/// attributes reside.
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unsigned getSlotIndex(unsigned Slot) const {
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return getNode(Slot)->first;
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}
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/// \brief Retrieve the attributes for the given "slot" in the AttrNode list.
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/// \p Slot is an index into the AttrNodes list, not the index of the return /
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/// parameter/ function which the attributes apply to.
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AttributeSet getSlotAttributes(unsigned Slot) const {
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return AttributeSet::get(Context, *getNode(Slot));
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}
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/// \brief Retrieve the attribute set node for the given "slot" in the
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/// AttrNode list.
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AttributeSetNode *getSlotNode(unsigned Slot) const {
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return getNode(Slot)->second;
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}
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typedef AttributeSetNode::iterator iterator;
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iterator begin(unsigned Slot) const { return getSlotNode(Slot)->begin(); }
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iterator end(unsigned Slot) const { return getSlotNode(Slot)->end(); }
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void Profile(FoldingSetNodeID &ID) const {
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Profile(ID, makeArrayRef(getNode(0), getNumAttributes()));
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}
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static void Profile(FoldingSetNodeID &ID,
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ArrayRef<std::pair<unsigned, AttributeSetNode*> > Nodes) {
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for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
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ID.AddInteger(Nodes[i].first);
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ID.AddPointer(Nodes[i].second);
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}
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}
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// FIXME: This atrocity is temporary.
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uint64_t Raw(unsigned Index) const;
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void dump() const;
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};
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static_assert(AlignOf<AttributeSetImpl>::Alignment >=
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AlignOf<AttributeSetImpl::IndexAttrPair>::Alignment,
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"Alignment sufficient for objects appended to AttributeSetImpl");
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} // end llvm namespace
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#endif
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