mirror of
https://github.com/c64scene-ar/llvm-6502.git
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974a445bd9
subsequent changes are easier to review. About to fix some layering issues, and wanted to separate out the necessary churn. Also comment and sink the include of "Windows.h" in three .inc files to match the usage in Memory.inc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198685 91177308-0d34-0410-b5e6-96231b3b80d8
483 lines
14 KiB
C++
483 lines
14 KiB
C++
//===--- lib/CodeGen/DIE.h - DWARF Info Entries -----------------*- 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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// Data structures for DWARF info entries.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CODEGEN_ASMPRINTER_DIE_H__
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#define CODEGEN_ASMPRINTER_DIE_H__
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Dwarf.h"
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#include <vector>
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namespace llvm {
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class AsmPrinter;
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class MCSymbol;
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class MCSymbolRefExpr;
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class raw_ostream;
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class DwarfTypeUnit;
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//===--------------------------------------------------------------------===//
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/// DIEAbbrevData - Dwarf abbreviation data, describes one attribute of a
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/// Dwarf abbreviation.
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class DIEAbbrevData {
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/// Attribute - Dwarf attribute code.
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///
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dwarf::Attribute Attribute;
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/// Form - Dwarf form code.
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///
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dwarf::Form Form;
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public:
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DIEAbbrevData(dwarf::Attribute A, dwarf::Form F) : Attribute(A), Form(F) {}
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// Accessors.
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dwarf::Attribute getAttribute() const { return Attribute; }
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dwarf::Form getForm() const { return Form; }
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void Profile(FoldingSetNodeID &ID) const;
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};
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//===--------------------------------------------------------------------===//
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/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
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/// information object.
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class DIEAbbrev : public FoldingSetNode {
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/// Tag - Dwarf tag code.
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///
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dwarf::Tag Tag;
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/// ChildrenFlag - Dwarf children flag.
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///
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uint16_t ChildrenFlag;
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/// Unique number for node.
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///
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unsigned Number;
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/// Data - Raw data bytes for abbreviation.
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///
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SmallVector<DIEAbbrevData, 12> Data;
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public:
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DIEAbbrev(dwarf::Tag T, uint16_t C) : Tag(T), ChildrenFlag(C), Data() {}
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// Accessors.
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dwarf::Tag getTag() const { return Tag; }
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unsigned getNumber() const { return Number; }
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uint16_t getChildrenFlag() const { return ChildrenFlag; }
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const SmallVectorImpl<DIEAbbrevData> &getData() const { return Data; }
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void setChildrenFlag(uint16_t CF) { ChildrenFlag = CF; }
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void setNumber(unsigned N) { Number = N; }
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/// AddAttribute - Adds another set of attribute information to the
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/// abbreviation.
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void AddAttribute(dwarf::Attribute Attribute, dwarf::Form Form) {
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Data.push_back(DIEAbbrevData(Attribute, Form));
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}
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void Profile(FoldingSetNodeID &ID) const;
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/// Emit - Print the abbreviation using the specified asm printer.
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///
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void Emit(AsmPrinter *AP) const;
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#ifndef NDEBUG
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void print(raw_ostream &O);
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void dump();
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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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std::vector<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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public:
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explicit DIE(unsigned Tag)
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: Offset(0), Size(0), Abbrev((dwarf::Tag)Tag, dwarf::DW_CHILDREN_no),
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Parent(0) {}
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~DIE();
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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<DIE *> &getChildren() const { return Children; }
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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,
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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(DIE *Child) {
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assert(!Child->getParent());
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Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
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Children.push_back(Child);
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Child->Parent = this;
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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(uint16_t 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.
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///
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class DIEValue {
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virtual void anchor();
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public:
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enum {
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isInteger,
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isString,
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isExpr,
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isLabel,
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isDelta,
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isEntry,
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isTypeSignature,
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isBlock
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};
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protected:
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/// Type - Type of data stored in the value.
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///
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unsigned Type;
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public:
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explicit DIEValue(unsigned T) : Type(T) {}
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virtual ~DIEValue() {}
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// Accessors
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unsigned getType() const { return Type; }
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/// EmitValue - Emit value via the Dwarf writer.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const = 0;
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/// SizeOf - Return the size of a value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const = 0;
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const = 0;
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void dump() const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEInteger - An integer value DIE.
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///
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class DIEInteger : public DIEValue {
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uint64_t Integer;
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public:
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explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
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/// BestForm - Choose the best form for integer.
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///
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static dwarf::Form BestForm(bool IsSigned, uint64_t Int) {
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if (IsSigned) {
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const int64_t SignedInt = Int;
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if ((char)Int == SignedInt) return dwarf::DW_FORM_data1;
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if ((short)Int == SignedInt) return dwarf::DW_FORM_data2;
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if ((int)Int == SignedInt) return dwarf::DW_FORM_data4;
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} else {
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if ((unsigned char)Int == Int) return dwarf::DW_FORM_data1;
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if ((unsigned short)Int == Int) return dwarf::DW_FORM_data2;
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if ((unsigned int)Int == Int) return dwarf::DW_FORM_data4;
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}
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return dwarf::DW_FORM_data8;
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}
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/// EmitValue - Emit integer of appropriate size.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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uint64_t getValue() const { return Integer; }
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/// SizeOf - Determine size of integer value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *I) { return I->getType() == isInteger; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEExpr - An expression DIE.
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//
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class DIEExpr : public DIEValue {
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const MCExpr *Expr;
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public:
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explicit DIEExpr(const MCExpr *E) : DIEValue(isExpr), Expr(E) {}
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/// EmitValue - Emit expression value.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// getValue - Get MCExpr.
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///
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const MCExpr *getValue() const { return Expr; }
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/// SizeOf - Determine size of expression value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) { return E->getType() == isExpr; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIELabel - A label DIE.
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//
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class DIELabel : public DIEValue {
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const MCSymbol *Label;
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public:
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explicit DIELabel(const MCSymbol *L) : DIEValue(isLabel), Label(L) {}
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/// EmitValue - Emit label value.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// getValue - Get MCSymbol.
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///
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const MCSymbol *getValue() const { return Label; }
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/// SizeOf - Determine size of label value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *L) { return L->getType() == isLabel; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEDelta - A simple label difference DIE.
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///
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class DIEDelta : public DIEValue {
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const MCSymbol *LabelHi;
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const MCSymbol *LabelLo;
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public:
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DIEDelta(const MCSymbol *Hi, const MCSymbol *Lo)
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: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
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/// EmitValue - Emit delta value.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// SizeOf - Determine size of delta value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *D) { return D->getType() == isDelta; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEString - A container for string values.
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///
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class DIEString : public DIEValue {
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const DIEValue *Access;
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const StringRef Str;
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public:
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DIEString(const DIEValue *Acc, const StringRef S)
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: DIEValue(isString), Access(Acc), Str(S) {}
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/// getString - Grab the string out of the object.
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StringRef getString() const { return Str; }
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/// EmitValue - Emit delta value.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// SizeOf - Determine size of delta value in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *D) { return D->getType() == isString; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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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 DIEEntry : public DIEValue {
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DIE *const Entry;
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public:
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explicit DIEEntry(DIE *E) : DIEValue(isEntry), Entry(E) {
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assert(E && "Cannot construct a DIEEntry with a null DIE");
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}
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DIE *getEntry() const { return Entry; }
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/// EmitValue - Emit debug information entry offset.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// SizeOf - Determine size of debug information entry in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
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return Form == dwarf::DW_FORM_ref_addr ? getRefAddrSize(AP)
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: sizeof(int32_t);
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}
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/// Returns size of a ref_addr entry.
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static unsigned getRefAddrSize(AsmPrinter *AP);
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) { return E->getType() == isEntry; }
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// \brief A signature reference to a type unit.
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class DIETypeSignature : public DIEValue {
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const DwarfTypeUnit &Unit;
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public:
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explicit DIETypeSignature(const DwarfTypeUnit &Unit)
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: DIEValue(isTypeSignature), Unit(Unit) {}
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/// \brief Emit type unit signature.
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virtual void EmitValue(AsmPrinter *Asm, dwarf::Form Form) const;
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/// Returns size of a ref_sig8 entry.
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
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assert(Form == dwarf::DW_FORM_ref_sig8);
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return 8;
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}
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// \brief Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) {
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return E->getType() == isTypeSignature;
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}
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#ifndef NDEBUG
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virtual void print(raw_ostream &O) const;
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void dump() const;
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#endif
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};
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//===--------------------------------------------------------------------===//
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/// DIEBlock - A block of values. Primarily used for location expressions.
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//
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class DIEBlock : public DIEValue, public DIE {
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unsigned Size; // Size in bytes excluding size header.
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public:
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DIEBlock() : DIEValue(isBlock), DIE(0), Size(0) {}
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/// ComputeSize - calculate the size of the block.
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///
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unsigned ComputeSize(AsmPrinter *AP);
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/// BestForm - Choose the best form for data.
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///
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dwarf::Form BestForm() const {
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if ((unsigned char)Size == Size) return dwarf::DW_FORM_block1;
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if ((unsigned short)Size == Size) return dwarf::DW_FORM_block2;
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if ((unsigned int)Size == Size) return dwarf::DW_FORM_block4;
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return dwarf::DW_FORM_block;
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}
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/// EmitValue - Emit block data.
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///
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virtual void EmitValue(AsmPrinter *AP, dwarf::Form Form) const;
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/// SizeOf - Determine size of block data in bytes.
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///
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virtual unsigned SizeOf(AsmPrinter *AP, dwarf::Form Form) const;
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *E) { return E->getType() == isBlock; }
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#ifndef NDEBUG
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virtual void print(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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