mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-03 15:29:28 +00:00
497a7a81a8
implementation detail of DIFactory anyway, and this allows it to avoid recomputing the same type over and over. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58960 91177308-0d34-0410-b5e6-96231b3b80d8
395 lines
16 KiB
C++
395 lines
16 KiB
C++
//===--- llvm/Analysis/DebugInfo.h - Debug Information Helpers --*- 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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// This file defines a bunch of datatypes that are useful for creating and
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// walking debug info in LLVM IR form.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_DEBUGINFO_H
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#define LLVM_SUPPORT_DEBUGINFO_H
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/DenseMap.h"
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namespace llvm {
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class BasicBlock;
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class Constant;
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class Function;
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class GlobalVariable;
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class Module;
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class Type;
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class Value;
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class DIDescriptor {
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public:
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enum {
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Version6 = 6 << 16, // Current version of debug information.
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Version5 = 5 << 16, // Constant for version 5.
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Version4 = 4 << 16, // Constant for version 4.
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VersionMask = 0xffff0000 // Mask for version number.
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};
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protected:
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GlobalVariable *GV;
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/// DIDescriptor constructor. If the specified GV is non-null, this checks
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/// to make sure that the tag in the descriptor matches 'RequiredTag'. If
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/// not, the debug info is corrupt and we ignore it.
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DIDescriptor(GlobalVariable *GV, unsigned RequiredTag);
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unsigned getTag() const {
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return getUnsignedField(0) & ~VersionMask;
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}
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unsigned getVersion() const {
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return getUnsignedField(0) & VersionMask;
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}
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std::string getStringField(unsigned Elt) const;
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unsigned getUnsignedField(unsigned Elt) const {
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return (unsigned)getUInt64Field(Elt);
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}
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uint64_t getUInt64Field(unsigned Elt) const;
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DIDescriptor getDescriptorField(unsigned Elt) const;
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template <typename DescTy>
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DescTy getFieldAs(unsigned Elt) const {
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return DescTy(getDescriptorField(6).getGV());
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}
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GlobalVariable *getGlobalVariableField(unsigned Elt) const;
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public:
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explicit DIDescriptor() : GV(0) {}
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explicit DIDescriptor(GlobalVariable *gv) : GV(gv) {}
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bool isNull() const { return GV == 0; }
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GlobalVariable *getGV() const { return GV; }
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};
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/// DIAnchor - A wrapper for various anchor descriptors.
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class DIAnchor : public DIDescriptor {
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public:
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explicit DIAnchor(GlobalVariable *GV = 0);
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unsigned getAnchorTag() const { return getUnsignedField(1); }
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};
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/// DIArray - This descriptor holds an array of descriptors.
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class DIArray : public DIDescriptor {
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public:
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explicit DIArray(GlobalVariable *GV = 0) : DIDescriptor(GV) {}
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unsigned getNumElements() const;
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DIDescriptor getElement(unsigned Idx) const;
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};
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/// DICompileUnit - A wrapper for a compile unit.
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class DICompileUnit : public DIDescriptor {
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public:
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explicit DICompileUnit(GlobalVariable *GV = 0);
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unsigned getLanguage() const { return getUnsignedField(2); }
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std::string getFilename() const { return getStringField(3); }
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std::string getDirectory() const { return getStringField(4); }
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std::string getProducer() const { return getStringField(5); }
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};
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/// DIEnumerator - A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
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/// FIXME: it seems strange that this doesn't have either a reference to the
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/// type/precision or a file/line pair for location info.
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class DIEnumerator : public DIDescriptor {
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public:
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explicit DIEnumerator(GlobalVariable *GV = 0);
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std::string getName() const { return getStringField(1); }
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uint64_t getLanguage() const { return getUInt64Field(2); }
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};
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/// DISubrange - This is used to represent ranges, for array bounds.
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class DISubrange : public DIDescriptor {
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public:
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explicit DISubrange(GlobalVariable *GV = 0);
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int64_t getLo() const { return (int64_t)getUInt64Field(1); }
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int64_t getHi() const { return (int64_t)getUInt64Field(2); }
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};
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/// DIType - This is a wrapper for a type.
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/// FIXME: Types should be factored much better so that CV qualifiers and
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/// others do not require a huge and empty descriptor full of zeros.
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class DIType : public DIDescriptor {
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protected:
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DIType(GlobalVariable *GV, unsigned Tag) : DIDescriptor(GV, Tag) {}
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// This ctor is used when the Tag has already been validated by a derived
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// ctor.
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DIType(GlobalVariable *GV, bool, bool) : DIDescriptor(GV) {}
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public:
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explicit DIType(GlobalVariable *GV);
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explicit DIType() {}
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DIDescriptor getContext() const { return getDescriptorField(1); }
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std::string getName() const { return getStringField(2); }
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DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(3); }
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unsigned getLineNumber() const { return getUnsignedField(4); }
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uint64_t getSizeInBits() const { return getUInt64Field(5); }
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uint64_t getAlignInBits() const { return getUInt64Field(6); }
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// FIXME: Offset is only used for DW_TAG_member nodes. Making every type
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// carry this is just plain insane.
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uint64_t getOffsetInBits() const { return getUInt64Field(7); }
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unsigned getFlags() const { return getUnsignedField(8); }
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};
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/// DIBasicType - A basic type, like 'int' or 'float'.
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class DIBasicType : public DIType {
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public:
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explicit DIBasicType(GlobalVariable *GV);
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unsigned getEncoding() const { return getUnsignedField(9); }
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};
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/// DIDerivedType - A simple derived type, like a const qualified type,
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/// a typedef, a pointer or reference, etc.
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class DIDerivedType : public DIType {
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protected:
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explicit DIDerivedType(GlobalVariable *GV, bool, bool)
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: DIType(GV, true, true) {}
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public:
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explicit DIDerivedType(GlobalVariable *GV);
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DIType getTypeDerivedFrom() const { return getFieldAs<DIType>(9); }
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/// isDerivedType - Return true if the specified tag is legal for
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/// DIDerivedType.
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static bool isDerivedType(unsigned TAG);
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};
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/// DICompositeType - This descriptor holds a type that can refer to multiple
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/// other types, like a function or struct.
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/// FIXME: Why is this a DIDerivedType??
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class DICompositeType : public DIDerivedType {
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public:
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explicit DICompositeType(GlobalVariable *GV);
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DIArray getTypeArray() const { return getFieldAs<DIArray>(10); }
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/// isCompositeType - Return true if the specified tag is legal for
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/// DICompositeType.
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static bool isCompositeType(unsigned TAG);
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};
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/// DIGlobal - This is a common class for global variables and subprograms.
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class DIGlobal : public DIDescriptor {
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protected:
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explicit DIGlobal(GlobalVariable *GV, unsigned RequiredTag)
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: DIDescriptor(GV, RequiredTag) {}
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public:
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DIDescriptor getContext() const { return getDescriptorField(2); }
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std::string getName() const { return getStringField(3); }
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std::string getDisplayName() const { return getStringField(4); }
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std::string getLinkageName() const { return getStringField(5); }
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DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(6); }
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unsigned getLineNumber() const { return getUnsignedField(7); }
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DIType getType() const { return getFieldAs<DIType>(8); }
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/// isLocalToUnit - Return true if this subprogram is local to the current
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/// compile unit, like 'static' in C.
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unsigned isLocalToUnit() const { return getUnsignedField(9); }
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unsigned isDefinition() const { return getUnsignedField(10); }
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};
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/// DISubprogram - This is a wrapper for a subprogram (e.g. a function).
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class DISubprogram : public DIGlobal {
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public:
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explicit DISubprogram(GlobalVariable *GV = 0);
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};
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/// DIGlobalVariable - This is a wrapper for a global variable.
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class DIGlobalVariable : public DIGlobal {
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public:
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explicit DIGlobalVariable(GlobalVariable *GV = 0);
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GlobalVariable *getGlobal() const { return getGlobalVariableField(11); }
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};
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/// DIVariable - This is a wrapper for a variable (e.g. parameter, local,
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/// global etc).
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class DIVariable : public DIDescriptor {
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public:
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explicit DIVariable(GlobalVariable *GV = 0);
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DIDescriptor getContext() const { return getDescriptorField(1); }
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std::string getName() const { return getStringField(2); }
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DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(3); }
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unsigned getLineNumber() const { return getUnsignedField(4); }
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DIType getType() const { return getFieldAs<DIType>(5); }
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/// isVariable - Return true if the specified tag is legal for DIVariable.
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static bool isVariable(unsigned Tag);
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};
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/// DIBlock - This is a wrapper for a block (e.g. a function, scope, etc).
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class DIBlock : public DIDescriptor {
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public:
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explicit DIBlock(GlobalVariable *GV = 0);
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DIDescriptor getContext() const { return getDescriptorField(1); }
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};
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/// DIFactory - This object assists with the construction of the various
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/// descriptors.
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class DIFactory {
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Module &M;
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// Cached values for uniquing and faster lookups.
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DIAnchor CompileUnitAnchor, SubProgramAnchor, GlobalVariableAnchor;
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const Type *EmptyStructPtr; // "{}*".
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Function *StopPointFn; // llvm.dbg.stoppoint
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Function *FuncStartFn; // llvm.dbg.func.start
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Function *RegionStartFn; // llvm.dbg.region.start
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Function *RegionEndFn; // llvm.dbg.region.end
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Function *DeclareFn; // llvm.dbg.declare
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StringMap<Constant*> StringCache;
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DenseMap<Constant*, DIDescriptor> SimpleConstantCache;
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DIFactory(const DIFactory &); // DO NOT IMPLEMENT
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void operator=(const DIFactory&); // DO NOT IMPLEMENT
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public:
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explicit DIFactory(Module &m);
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/// GetOrCreateCompileUnitAnchor - Return the anchor for compile units,
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/// creating a new one if there isn't already one in the module.
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DIAnchor GetOrCreateCompileUnitAnchor();
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/// GetOrCreateSubprogramAnchor - Return the anchor for subprograms,
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/// creating a new one if there isn't already one in the module.
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DIAnchor GetOrCreateSubprogramAnchor();
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/// GetOrCreateGlobalVariableAnchor - Return the anchor for globals,
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/// creating a new one if there isn't already one in the module.
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DIAnchor GetOrCreateGlobalVariableAnchor();
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/// GetOrCreateArray - Create an descriptor for an array of descriptors.
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/// This implicitly uniques the arrays created.
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DIArray GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys);
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/// GetOrCreateSubrange - Create a descriptor for a value range. This
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/// implicitly uniques the values returned.
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DISubrange GetOrCreateSubrange(int64_t Lo, int64_t Hi);
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/// CreateCompileUnit - Create a new descriptor for the specified compile
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/// unit.
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DICompileUnit CreateCompileUnit(unsigned LangID,
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const std::string &Filename,
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const std::string &Directory,
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const std::string &Producer);
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/// CreateEnumerator - Create a single enumerator value.
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DIEnumerator CreateEnumerator(const std::string &Name, uint64_t Val);
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/// CreateBasicType - Create a basic type like int, float, etc.
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DIBasicType CreateBasicType(DIDescriptor Context, const std::string &Name,
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DICompileUnit CompileUnit, unsigned LineNumber,
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uint64_t SizeInBits, uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
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unsigned Encoding);
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/// CreateDerivedType - Create a derived type like const qualified type,
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/// pointer, typedef, etc.
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DIDerivedType CreateDerivedType(unsigned Tag, DIDescriptor Context,
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const std::string &Name,
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DICompileUnit CompileUnit,
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unsigned LineNumber,
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uint64_t SizeInBits, uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
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DIType DerivedFrom);
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/// CreateCompositeType - Create a composite type like array, struct, etc.
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DICompositeType CreateCompositeType(unsigned Tag, DIDescriptor Context,
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const std::string &Name,
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DICompileUnit CompileUnit,
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unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
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DIType DerivedFrom,
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DIArray Elements);
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/// CreateSubprogram - Create a new descriptor for the specified subprogram.
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/// See comments in DISubprogram for descriptions of these fields.
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DISubprogram CreateSubprogram(DIDescriptor Context, const std::string &Name,
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const std::string &DisplayName,
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const std::string &LinkageName,
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DICompileUnit CompileUnit, unsigned LineNo,
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DIType Type, bool isLocalToUnit,
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bool isDefinition);
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/// CreateGlobalVariable - Create a new descriptor for the specified global.
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DIGlobalVariable
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CreateGlobalVariable(DIDescriptor Context, const std::string &Name,
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const std::string &DisplayName,
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const std::string &LinkageName,
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DICompileUnit CompileUnit,
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unsigned LineNo, DIType Type, bool isLocalToUnit,
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bool isDefinition, llvm::GlobalVariable *GV);
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/// CreateVariable - Create a new descriptor for the specified variable.
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DIVariable CreateVariable(unsigned Tag, DIDescriptor Context,
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const std::string &Name,
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DICompileUnit CompileUnit, unsigned LineNo,
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DIType Type);
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/// CreateBlock - This creates a descriptor for a lexical block with the
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/// specified parent context.
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DIBlock CreateBlock(DIDescriptor Context);
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/// InsertStopPoint - Create a new llvm.dbg.stoppoint intrinsic invocation,
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/// inserting it at the end of the specified basic block.
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void InsertStopPoint(DICompileUnit CU, unsigned LineNo, unsigned ColNo,
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BasicBlock *BB);
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/// InsertSubprogramStart - Create a new llvm.dbg.func.start intrinsic to
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/// mark the start of the specified subprogram.
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void InsertSubprogramStart(DISubprogram SP, BasicBlock *BB);
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/// InsertRegionStart - Insert a new llvm.dbg.region.start intrinsic call to
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/// mark the start of a region for the specified scoping descriptor.
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void InsertRegionStart(DIDescriptor D, BasicBlock *BB);
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/// InsertRegionEnd - Insert a new llvm.dbg.region.end intrinsic call to
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/// mark the end of a region for the specified scoping descriptor.
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void InsertRegionEnd(DIDescriptor D, BasicBlock *BB);
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/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
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void InsertDeclare(llvm::Value *Storage, DIVariable D, BasicBlock *BB);
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private:
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Constant *GetTagConstant(unsigned TAG);
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Constant *GetStringConstant(const std::string &String);
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DIAnchor GetOrCreateAnchor(unsigned TAG, const char *Name);
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/// getCastToEmpty - Return the descriptor as a Constant* with type '{}*'.
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Constant *getCastToEmpty(DIDescriptor D);
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};
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} // end namespace llvm
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#endif
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