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AsmPrinter: Reorganize DIE.h, NFC
An upcoming commit will switch to storing `DIEValue`s by value in a `DIE`, so move the `DIE` down below all the subclasses it can. Two subclasses inherit from `DIE`, so drop those down below `DIE`. `DIEValue` will become a discriminated union, which contains an instance of one of the classes that are currently subclasses. "Big" ones, such as those that inherit from `DIE`, will continue to be stored by pointer. This commit does as much of the code motion ahead of time as possible. llvm-svn: 238346
This commit is contained in:
Duncan P. N. Exon Smith
parent
b26209eb93
commit
ceedfec2fb
@ -104,98 +104,6 @@ public:
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIE - A structured debug information entry. Has an abbreviation which
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/// describes its organization.
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class DIEValue;
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class DIE {
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protected:
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/// Offset - Offset in debug info section.
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///
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unsigned Offset;
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/// Size - Size of instance + children.
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///
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unsigned Size;
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/// Abbrev - Buffer for constructing abbreviation.
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///
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DIEAbbrev Abbrev;
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/// Children DIEs.
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///
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// This can't be a vector<DIE> because pointer validity is requirent for the
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// Parent pointer and DIEEntry.
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// It can't be a list<DIE> because some clients need pointer validity before
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// the object has been added to any child list
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// (eg: DwarfUnit::constructVariableDIE). These aren't insurmountable, but may
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// be more convoluted than beneficial.
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std::vector<std::unique_ptr<DIE>> Children;
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DIE *Parent;
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/// Attribute values.
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///
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SmallVector<DIEValue *, 12> Values;
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protected:
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DIE()
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: Offset(0), Size(0), Abbrev((dwarf::Tag)0, dwarf::DW_CHILDREN_no),
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Parent(nullptr) {}
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public:
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explicit DIE(dwarf::Tag Tag)
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: Offset(0), Size(0), Abbrev((dwarf::Tag)Tag, dwarf::DW_CHILDREN_no),
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Parent(nullptr) {}
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// Accessors.
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DIEAbbrev &getAbbrev() { return Abbrev; }
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const DIEAbbrev &getAbbrev() const { return Abbrev; }
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unsigned getAbbrevNumber() const { return Abbrev.getNumber(); }
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dwarf::Tag getTag() const { return Abbrev.getTag(); }
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unsigned getOffset() const { return Offset; }
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unsigned getSize() const { return Size; }
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const std::vector<std::unique_ptr<DIE>> &getChildren() const {
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return Children;
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}
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const SmallVectorImpl<DIEValue *> &getValues() const { return Values; }
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DIE *getParent() const { return Parent; }
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/// Climb up the parent chain to get the compile or type unit DIE this DIE
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/// belongs to.
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const DIE *getUnit() const;
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/// Similar to getUnit, returns null when DIE is not added to an
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/// owner yet.
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const DIE *getUnitOrNull() const;
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void setOffset(unsigned O) { Offset = O; }
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void setSize(unsigned S) { Size = S; }
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/// addValue - Add a value and attributes to a DIE.
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///
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void addValue(dwarf::Attribute Attribute, dwarf::Form Form, DIEValue *Value) {
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Abbrev.AddAttribute(Attribute, Form);
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Values.push_back(Value);
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}
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/// addChild - Add a child to the DIE.
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///
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void addChild(std::unique_ptr<DIE> Child) {
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assert(!Child->getParent());
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Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
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Child->Parent = this;
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Children.push_back(std::move(Child));
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}
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/// findAttribute - Find a value in the DIE with the attribute given,
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/// returns NULL if no such attribute exists.
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DIEValue *findAttribute(dwarf::Attribute Attribute) const;
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#ifndef NDEBUG
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void print(raw_ostream &O, unsigned IndentCount = 0) const;
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void dump();
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEValue - A debug information entry value. Some of these roughly correlate
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/// to DWARF attribute classes.
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@ -399,6 +307,7 @@ private:
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/// DIEEntry - A pointer to another debug information entry. An instance of
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/// this class can also be used as a proxy for a debug information entry not
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/// yet defined (ie. types.)
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class DIE;
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class DIEEntry : public DIEValue {
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friend class DIEValue;
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@ -456,6 +365,124 @@ private:
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIELocList - Represents a pointer to a location list in the debug_loc
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/// section.
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//
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class DIELocList : public DIEValue {
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friend class DIEValue;
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// Index into the .debug_loc vector.
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size_t Index;
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public:
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DIELocList(size_t I) : DIEValue(isLocList), Index(I) {}
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/// getValue - Grab the current index out.
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size_t getValue() const { return Index; }
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) { return E->getType() == isLocList; }
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private:
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void EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const;
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unsigned SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const;
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#ifndef NDEBUG
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void printImpl(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIE - A structured debug information entry. Has an abbreviation which
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/// describes its organization.
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class DIE {
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protected:
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/// Offset - Offset in debug info section.
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///
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unsigned Offset;
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/// Size - Size of instance + children.
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///
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unsigned Size;
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/// Abbrev - Buffer for constructing abbreviation.
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///
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DIEAbbrev Abbrev;
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/// Children DIEs.
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///
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// This can't be a vector<DIE> because pointer validity is requirent for the
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// Parent pointer and DIEEntry.
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// It can't be a list<DIE> because some clients need pointer validity before
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// the object has been added to any child list
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// (eg: DwarfUnit::constructVariableDIE). These aren't insurmountable, but may
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// be more convoluted than beneficial.
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std::vector<std::unique_ptr<DIE>> Children;
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DIE *Parent;
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/// Attribute values.
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///
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SmallVector<DIEValue *, 12> Values;
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protected:
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DIE()
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: Offset(0), Size(0), Abbrev((dwarf::Tag)0, dwarf::DW_CHILDREN_no),
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Parent(nullptr) {}
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public:
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explicit DIE(dwarf::Tag Tag)
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: Offset(0), Size(0), Abbrev((dwarf::Tag)Tag, dwarf::DW_CHILDREN_no),
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Parent(nullptr) {}
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// Accessors.
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DIEAbbrev &getAbbrev() { return Abbrev; }
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const DIEAbbrev &getAbbrev() const { return Abbrev; }
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unsigned getAbbrevNumber() const { return Abbrev.getNumber(); }
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dwarf::Tag getTag() const { return Abbrev.getTag(); }
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unsigned getOffset() const { return Offset; }
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unsigned getSize() const { return Size; }
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const std::vector<std::unique_ptr<DIE>> &getChildren() const {
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return Children;
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}
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const SmallVectorImpl<DIEValue *> &getValues() const { return Values; }
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DIE *getParent() const { return Parent; }
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/// Climb up the parent chain to get the compile or type unit DIE this DIE
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/// belongs to.
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const DIE *getUnit() const;
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/// Similar to getUnit, returns null when DIE is not added to an
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/// owner yet.
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const DIE *getUnitOrNull() const;
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void setOffset(unsigned O) { Offset = O; }
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void setSize(unsigned S) { Size = S; }
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/// addValue - Add a value and attributes to a DIE.
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///
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void addValue(dwarf::Attribute Attribute, dwarf::Form Form, DIEValue *Value) {
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Abbrev.AddAttribute(Attribute, Form);
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Values.push_back(Value);
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}
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/// addChild - Add a child to the DIE.
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///
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void addChild(std::unique_ptr<DIE> Child) {
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assert(!Child->getParent());
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Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
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Child->Parent = this;
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Children.push_back(std::move(Child));
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}
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/// findAttribute - Find a value in the DIE with the attribute given,
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/// returns NULL if no such attribute exists.
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DIEValue *findAttribute(dwarf::Attribute Attribute) const;
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#ifndef NDEBUG
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void print(raw_ostream &O, unsigned IndentCount = 0) const;
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void dump();
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIELoc - Represents an expression location.
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//
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@ -535,34 +562,6 @@ private:
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIELocList - Represents a pointer to a location list in the debug_loc
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/// section.
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//
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class DIELocList : public DIEValue {
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friend class DIEValue;
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// Index into the .debug_loc vector.
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size_t Index;
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public:
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DIELocList(size_t I) : DIEValue(isLocList), Index(I) {}
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/// getValue - Grab the current index out.
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size_t getValue() const { return Index; }
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) { return E->getType() == isLocList; }
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private:
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void EmitValueImpl(const AsmPrinter *AP, dwarf::Form Form) const;
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unsigned SizeOfImpl(const AsmPrinter *AP, dwarf::Form Form) const;
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#ifndef NDEBUG
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void printImpl(raw_ostream &O) const;
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#endif
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};
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} // end llvm namespace
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#endif
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