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//===--- ASTContext.h - Context to hold long-lived AST nodes ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the ASTContext interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_ASTCONTEXT_H
#define LLVM_CLANG_AST_ASTCONTEXT_H
#include "clang/AST/Builtins.h"
#include "clang/AST/Expr.h"
#include "clang/AST/RecordLayout.h"
#include "clang/AST/Type.h"
#include "llvm/ADT/DenseMap.h"
#include <vector>
namespace clang {
class TargetInfo;
/// ASTContext - This class holds long-lived AST nodes (such as types and
/// decls) that can be referred to throughout the semantic analysis of a file.
class ASTContext {
std::vector<Type*> Types;
llvm::FoldingSet<ComplexType> ComplexTypes;
llvm::FoldingSet<PointerType> PointerTypes;
llvm::FoldingSet<ReferenceType> ReferenceTypes;
llvm::FoldingSet<ArrayType> ArrayTypes;
llvm::FoldingSet<VectorType> VectorTypes;
llvm::FoldingSet<FunctionTypeNoProto> FunctionTypeNoProtos;
llvm::FoldingSet<FunctionTypeProto> FunctionTypeProtos;
llvm::DenseMap<const RecordDecl*, const RecordLayout*> RecordLayoutInfo;
public:
TargetInfo &Target;
Builtin::Context BuiltinInfo;
// Builtin Types.
QualType VoidTy;
QualType BoolTy;
QualType CharTy;
QualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy;
QualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy;
QualType UnsignedLongLongTy;
QualType FloatTy, DoubleTy, LongDoubleTy;
QualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy;
ASTContext(TargetInfo &t, IdentifierTable &idents) : Target(t) {
InitBuiltinTypes();
BuiltinInfo.InitializeBuiltins(idents, Target);
}
~ASTContext();
void PrintStats() const;
//===--------------------------------------------------------------------===//
// Type Constructors
//===--------------------------------------------------------------------===//
/// getComplexType - Return the uniqued reference to the type for a complex
/// number with the specified element type.
QualType getComplexType(QualType T);
/// getPointerType - Return the uniqued reference to the type for a pointer to
/// the specified type.
QualType getPointerType(QualType T);
/// getReferenceType - Return the uniqued reference to the type for a
/// reference to the specified type.
QualType getReferenceType(QualType T);
/// getArrayType - Return the unique reference to the type for an array of the
/// specified element type.
QualType getArrayType(QualType EltTy, ArrayType::ArraySizeModifier ASM,
unsigned EltTypeQuals, Expr *NumElts);
/// getVectorType - Return the unique reference to a vector type of
/// the specified element type and size. VectorType must be a built-in type.
QualType getVectorType(QualType VectorType, unsigned NumElts);
/// getOCUVectorType - Return the unique reference to an OCU vector type of
/// the specified element type and size. VectorType must be a built-in type.
QualType getOCUVectorType(QualType VectorType, unsigned NumElts);
/// getFunctionTypeNoProto - Return a K&R style C function type like 'int()'.
///
QualType getFunctionTypeNoProto(QualType ResultTy);
/// getFunctionType - Return a normal function type with a typed argument
/// list. isVariadic indicates whether the argument list includes '...'.
QualType getFunctionType(QualType ResultTy, QualType *ArgArray,
unsigned NumArgs, bool isVariadic);
/// getTypedefType - Return the unique reference to the type for the
/// specified typename decl.
QualType getTypedefType(TypedefDecl *Decl);
/// getTagDeclType - Return the unique reference to the type for the
/// specified TagDecl (struct/union/class/enum) decl.
QualType getTagDeclType(TagDecl *Decl);
/// getSizeType - Return the unique type for "size_t" (C99 7.17), defined
/// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4).
QualType getSizeType() const;
/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?)
/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
QualType getPointerDiffType() const;
//===--------------------------------------------------------------------===//
// Type Sizing and Analysis
//===--------------------------------------------------------------------===//
/// getTypeInfo - Get the size and alignment of the specified complete type in
/// bits.
std::pair<uint64_t, unsigned> getTypeInfo(QualType T, SourceLocation L);
/// getTypeSize - Return the size of the specified type, in bits. This method
/// does not work on incomplete types.
uint64_t getTypeSize(QualType T, SourceLocation L) {
return getTypeInfo(T, L).first;
}
/// getTypeAlign - Return the alignment of the specified type, in bits. This
/// method does not work on incomplete types.
unsigned getTypeAlign(QualType T, SourceLocation L) {
return getTypeInfo(T, L).second;
}
/// getRecordLayout - Get or compute information about the layout of the
/// specified record (struct/union/class), which indicates its size and field
/// position information.
const RecordLayout &getRecordLayout(const RecordDecl *D, SourceLocation L);
//===--------------------------------------------------------------------===//
// Type Operators
//===--------------------------------------------------------------------===//
/// getIntegerBitwidth - Return the bitwidth of the specified integer type
/// according to the target. 'Loc' specifies the source location that
/// requires evaluation of this property.
unsigned getIntegerBitwidth(QualType T, SourceLocation Loc);
/// maxIntegerType - Returns the highest ranked integer type. Handles 3
/// different type combos: unsigned/unsigned, signed/signed, signed/unsigned.
static QualType maxIntegerType(QualType lhs, QualType rhs);
/// maxFloatingType - Returns the highest ranked float type. Both input
/// types are required to be floats.
static QualType maxFloatingType(QualType lt, QualType rt);
/// maxComplexType - Returns the highest ranked complex type. Handles 3
/// different type combos: complex/complex, complex/float, float/complex.
QualType maxComplexType(QualType lt, QualType rt) const;
private:
ASTContext(const ASTContext&); // DO NOT IMPLEMENT
void operator=(const ASTContext&); // DO NOT IMPLEMENT
void InitBuiltinTypes();
void InitBuiltinType(QualType &R, BuiltinType::Kind K);
};
} // end namespace clang
#endif
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