mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-06 05:06:45 +00:00
8fb614cb3b
politely and document this feature. This simple API extension then allows us to write all of the Instructions' address space query methods much more simply. No functionality change intended here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167223 91177308-0d34-0410-b5e6-96231b3b80d8
459 lines
18 KiB
C++
459 lines
18 KiB
C++
//===-- llvm/Type.h - Classes for handling data types -----------*- 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 contains the declaration of the Type class. For more "Type"
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// stuff, look in DerivedTypes.h.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TYPE_H
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#define LLVM_TYPE_H
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class PointerType;
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class IntegerType;
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class raw_ostream;
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class Module;
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class LLVMContext;
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class LLVMContextImpl;
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class StringRef;
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template<class GraphType> struct GraphTraits;
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/// The instances of the Type class are immutable: once they are created,
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/// they are never changed. Also note that only one instance of a particular
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/// type is ever created. Thus seeing if two types are equal is a matter of
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/// doing a trivial pointer comparison. To enforce that no two equal instances
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/// are created, Type instances can only be created via static factory methods
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/// in class Type and in derived classes. Once allocated, Types are never
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/// free'd.
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///
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class Type {
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public:
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//===--------------------------------------------------------------------===//
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/// Definitions of all of the base types for the Type system. Based on this
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/// value, you can cast to a class defined in DerivedTypes.h.
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/// Note: If you add an element to this, you need to add an element to the
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/// Type::getPrimitiveType function, or else things will break!
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/// Also update LLVMTypeKind and LLVMGetTypeKind () in the C binding.
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///
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enum TypeID {
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// PrimitiveTypes - make sure LastPrimitiveTyID stays up to date.
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VoidTyID = 0, ///< 0: type with no size
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HalfTyID, ///< 1: 16-bit floating point type
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FloatTyID, ///< 2: 32-bit floating point type
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DoubleTyID, ///< 3: 64-bit floating point type
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X86_FP80TyID, ///< 4: 80-bit floating point type (X87)
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FP128TyID, ///< 5: 128-bit floating point type (112-bit mantissa)
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PPC_FP128TyID, ///< 6: 128-bit floating point type (two 64-bits, PowerPC)
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LabelTyID, ///< 7: Labels
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MetadataTyID, ///< 8: Metadata
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X86_MMXTyID, ///< 9: MMX vectors (64 bits, X86 specific)
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// Derived types... see DerivedTypes.h file.
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// Make sure FirstDerivedTyID stays up to date!
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IntegerTyID, ///< 10: Arbitrary bit width integers
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FunctionTyID, ///< 11: Functions
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StructTyID, ///< 12: Structures
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ArrayTyID, ///< 13: Arrays
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PointerTyID, ///< 14: Pointers
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VectorTyID, ///< 15: SIMD 'packed' format, or other vector type
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NumTypeIDs, // Must remain as last defined ID
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LastPrimitiveTyID = X86_MMXTyID,
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FirstDerivedTyID = IntegerTyID
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};
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private:
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/// Context - This refers to the LLVMContext in which this type was uniqued.
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LLVMContext &Context;
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// Due to Ubuntu GCC bug 910363:
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// https://bugs.launchpad.net/ubuntu/+source/gcc-4.5/+bug/910363
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// Bitpack ID and SubclassData manually.
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// Note: TypeID : low 8 bit; SubclassData : high 24 bit.
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uint32_t IDAndSubclassData;
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protected:
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friend class LLVMContextImpl;
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explicit Type(LLVMContext &C, TypeID tid)
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: Context(C), IDAndSubclassData(0),
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NumContainedTys(0), ContainedTys(0) {
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setTypeID(tid);
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}
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~Type() {}
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void setTypeID(TypeID ID) {
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IDAndSubclassData = (ID & 0xFF) | (IDAndSubclassData & 0xFFFFFF00);
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assert(getTypeID() == ID && "TypeID data too large for field");
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}
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unsigned getSubclassData() const { return IDAndSubclassData >> 8; }
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void setSubclassData(unsigned val) {
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IDAndSubclassData = (IDAndSubclassData & 0xFF) | (val << 8);
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// Ensure we don't have any accidental truncation.
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assert(getSubclassData() == val && "Subclass data too large for field");
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}
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/// NumContainedTys - Keeps track of how many Type*'s there are in the
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/// ContainedTys list.
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unsigned NumContainedTys;
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/// ContainedTys - A pointer to the array of Types contained by this Type.
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/// For example, this includes the arguments of a function type, the elements
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/// of a structure, the pointee of a pointer, the element type of an array,
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/// etc. This pointer may be 0 for types that don't contain other types
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/// (Integer, Double, Float).
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Type * const *ContainedTys;
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public:
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void print(raw_ostream &O) const;
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void dump() const;
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/// getContext - Return the LLVMContext in which this type was uniqued.
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LLVMContext &getContext() const { return Context; }
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//===--------------------------------------------------------------------===//
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// Accessors for working with types.
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//
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/// getTypeID - Return the type id for the type. This will return one
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/// of the TypeID enum elements defined above.
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///
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TypeID getTypeID() const { return (TypeID)(IDAndSubclassData & 0xFF); }
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/// isVoidTy - Return true if this is 'void'.
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bool isVoidTy() const { return getTypeID() == VoidTyID; }
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/// isHalfTy - Return true if this is 'half', a 16-bit IEEE fp type.
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bool isHalfTy() const { return getTypeID() == HalfTyID; }
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/// isFloatTy - Return true if this is 'float', a 32-bit IEEE fp type.
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bool isFloatTy() const { return getTypeID() == FloatTyID; }
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/// isDoubleTy - Return true if this is 'double', a 64-bit IEEE fp type.
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bool isDoubleTy() const { return getTypeID() == DoubleTyID; }
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/// isX86_FP80Ty - Return true if this is x86 long double.
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bool isX86_FP80Ty() const { return getTypeID() == X86_FP80TyID; }
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/// isFP128Ty - Return true if this is 'fp128'.
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bool isFP128Ty() const { return getTypeID() == FP128TyID; }
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/// isPPC_FP128Ty - Return true if this is powerpc long double.
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bool isPPC_FP128Ty() const { return getTypeID() == PPC_FP128TyID; }
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/// isFloatingPointTy - Return true if this is one of the six floating point
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/// types
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bool isFloatingPointTy() const {
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return getTypeID() == HalfTyID || getTypeID() == FloatTyID ||
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getTypeID() == DoubleTyID ||
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getTypeID() == X86_FP80TyID || getTypeID() == FP128TyID ||
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getTypeID() == PPC_FP128TyID;
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}
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/// isX86_MMXTy - Return true if this is X86 MMX.
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bool isX86_MMXTy() const { return getTypeID() == X86_MMXTyID; }
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/// isFPOrFPVectorTy - Return true if this is a FP type or a vector of FP.
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///
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bool isFPOrFPVectorTy() const { return getScalarType()->isFloatingPointTy(); }
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/// isLabelTy - Return true if this is 'label'.
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bool isLabelTy() const { return getTypeID() == LabelTyID; }
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/// isMetadataTy - Return true if this is 'metadata'.
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bool isMetadataTy() const { return getTypeID() == MetadataTyID; }
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/// isIntegerTy - True if this is an instance of IntegerType.
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///
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bool isIntegerTy() const { return getTypeID() == IntegerTyID; }
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/// isIntegerTy - Return true if this is an IntegerType of the given width.
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bool isIntegerTy(unsigned Bitwidth) const;
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/// isIntOrIntVectorTy - Return true if this is an integer type or a vector of
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/// integer types.
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///
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bool isIntOrIntVectorTy() const { return getScalarType()->isIntegerTy(); }
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/// isFunctionTy - True if this is an instance of FunctionType.
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///
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bool isFunctionTy() const { return getTypeID() == FunctionTyID; }
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/// isStructTy - True if this is an instance of StructType.
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///
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bool isStructTy() const { return getTypeID() == StructTyID; }
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/// isArrayTy - True if this is an instance of ArrayType.
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///
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bool isArrayTy() const { return getTypeID() == ArrayTyID; }
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/// isPointerTy - True if this is an instance of PointerType.
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///
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bool isPointerTy() const { return getTypeID() == PointerTyID; }
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/// isPtrOrPtrVectorTy - Return true if this is a pointer type or a vector of
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/// pointer types.
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///
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bool isPtrOrPtrVectorTy() const { return getScalarType()->isPointerTy(); }
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/// isVectorTy - True if this is an instance of VectorType.
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///
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bool isVectorTy() const { return getTypeID() == VectorTyID; }
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/// canLosslesslyBitCastTo - Return true if this type could be converted
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/// with a lossless BitCast to type 'Ty'. For example, i8* to i32*. BitCasts
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/// are valid for types of the same size only where no re-interpretation of
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/// the bits is done.
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/// @brief Determine if this type could be losslessly bitcast to Ty
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bool canLosslesslyBitCastTo(Type *Ty) const;
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/// isEmptyTy - Return true if this type is empty, that is, it has no
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/// elements or all its elements are empty.
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bool isEmptyTy() const;
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/// Here are some useful little methods to query what type derived types are
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/// Note that all other types can just compare to see if this == Type::xxxTy;
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///
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bool isPrimitiveType() const { return getTypeID() <= LastPrimitiveTyID; }
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bool isDerivedType() const { return getTypeID() >= FirstDerivedTyID; }
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/// isFirstClassType - Return true if the type is "first class", meaning it
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/// is a valid type for a Value.
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///
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bool isFirstClassType() const {
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return getTypeID() != FunctionTyID && getTypeID() != VoidTyID;
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}
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/// isSingleValueType - Return true if the type is a valid type for a
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/// register in codegen. This includes all first-class types except struct
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/// and array types.
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///
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bool isSingleValueType() const {
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return (getTypeID() != VoidTyID && isPrimitiveType()) ||
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getTypeID() == IntegerTyID || getTypeID() == PointerTyID ||
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getTypeID() == VectorTyID;
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}
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/// isAggregateType - Return true if the type is an aggregate type. This
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/// means it is valid as the first operand of an insertvalue or
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/// extractvalue instruction. This includes struct and array types, but
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/// does not include vector types.
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///
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bool isAggregateType() const {
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return getTypeID() == StructTyID || getTypeID() == ArrayTyID;
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}
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/// isSized - Return true if it makes sense to take the size of this type. To
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/// get the actual size for a particular target, it is reasonable to use the
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/// DataLayout subsystem to do this.
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///
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bool isSized() const {
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// If it's a primitive, it is always sized.
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if (getTypeID() == IntegerTyID || isFloatingPointTy() ||
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getTypeID() == PointerTyID ||
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getTypeID() == X86_MMXTyID)
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return true;
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// If it is not something that can have a size (e.g. a function or label),
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// it doesn't have a size.
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if (getTypeID() != StructTyID && getTypeID() != ArrayTyID &&
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getTypeID() != VectorTyID)
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return false;
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// Otherwise we have to try harder to decide.
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return isSizedDerivedType();
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}
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/// getPrimitiveSizeInBits - Return the basic size of this type if it is a
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/// primitive type. These are fixed by LLVM and are not target dependent.
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/// This will return zero if the type does not have a size or is not a
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/// primitive type.
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///
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/// Note that this may not reflect the size of memory allocated for an
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/// instance of the type or the number of bytes that are written when an
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/// instance of the type is stored to memory. The DataLayout class provides
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/// additional query functions to provide this information.
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///
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unsigned getPrimitiveSizeInBits() const;
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/// getScalarSizeInBits - If this is a vector type, return the
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/// getPrimitiveSizeInBits value for the element type. Otherwise return the
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/// getPrimitiveSizeInBits value for this type.
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unsigned getScalarSizeInBits();
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/// getFPMantissaWidth - Return the width of the mantissa of this type. This
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/// is only valid on floating point types. If the FP type does not
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/// have a stable mantissa (e.g. ppc long double), this method returns -1.
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int getFPMantissaWidth() const;
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/// getScalarType - If this is a vector type, return the element type,
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/// otherwise return 'this'.
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const Type *getScalarType() const;
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Type *getScalarType();
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//===--------------------------------------------------------------------===//
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// Type Iteration support.
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//
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typedef Type * const *subtype_iterator;
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subtype_iterator subtype_begin() const { return ContainedTys; }
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subtype_iterator subtype_end() const { return &ContainedTys[NumContainedTys];}
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/// getContainedType - This method is used to implement the type iterator
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/// (defined a the end of the file). For derived types, this returns the
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/// types 'contained' in the derived type.
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///
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Type *getContainedType(unsigned i) const {
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assert(i < NumContainedTys && "Index out of range!");
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return ContainedTys[i];
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}
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/// getNumContainedTypes - Return the number of types in the derived type.
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///
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unsigned getNumContainedTypes() const { return NumContainedTys; }
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//===--------------------------------------------------------------------===//
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// Helper methods corresponding to subclass methods. This forces a cast to
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// the specified subclass and calls its accessor. "getVectorNumElements" (for
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// example) is shorthand for cast<VectorType>(Ty)->getNumElements(). This is
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// only intended to cover the core methods that are frequently used, helper
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// methods should not be added here.
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unsigned getIntegerBitWidth() const;
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Type *getFunctionParamType(unsigned i) const;
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unsigned getFunctionNumParams() const;
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bool isFunctionVarArg() const;
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StringRef getStructName() const;
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unsigned getStructNumElements() const;
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Type *getStructElementType(unsigned N) const;
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Type *getSequentialElementType() const;
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uint64_t getArrayNumElements() const;
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Type *getArrayElementType() const { return getSequentialElementType(); }
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unsigned getVectorNumElements() const;
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Type *getVectorElementType() const { return getSequentialElementType(); }
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Type *getPointerElementType() const { return getSequentialElementType(); }
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/// \brief Get the address space of this pointer or pointer vector type.
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unsigned getPointerAddressSpace() const;
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//===--------------------------------------------------------------------===//
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// Static members exported by the Type class itself. Useful for getting
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// instances of Type.
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//
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/// getPrimitiveType - Return a type based on an identifier.
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static Type *getPrimitiveType(LLVMContext &C, TypeID IDNumber);
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//===--------------------------------------------------------------------===//
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// These are the builtin types that are always available.
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//
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static Type *getVoidTy(LLVMContext &C);
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static Type *getLabelTy(LLVMContext &C);
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static Type *getHalfTy(LLVMContext &C);
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static Type *getFloatTy(LLVMContext &C);
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static Type *getDoubleTy(LLVMContext &C);
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static Type *getMetadataTy(LLVMContext &C);
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static Type *getX86_FP80Ty(LLVMContext &C);
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static Type *getFP128Ty(LLVMContext &C);
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static Type *getPPC_FP128Ty(LLVMContext &C);
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static Type *getX86_MMXTy(LLVMContext &C);
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static IntegerType *getIntNTy(LLVMContext &C, unsigned N);
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static IntegerType *getInt1Ty(LLVMContext &C);
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static IntegerType *getInt8Ty(LLVMContext &C);
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static IntegerType *getInt16Ty(LLVMContext &C);
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static IntegerType *getInt32Ty(LLVMContext &C);
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static IntegerType *getInt64Ty(LLVMContext &C);
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//===--------------------------------------------------------------------===//
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// Convenience methods for getting pointer types with one of the above builtin
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// types as pointee.
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//
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static PointerType *getHalfPtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getFloatPtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getDoublePtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getX86_FP80PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getFP128PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getPPC_FP128PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getX86_MMXPtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getIntNPtrTy(LLVMContext &C, unsigned N, unsigned AS = 0);
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static PointerType *getInt1PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getInt8PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getInt16PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getInt32PtrTy(LLVMContext &C, unsigned AS = 0);
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static PointerType *getInt64PtrTy(LLVMContext &C, unsigned AS = 0);
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/// getPointerTo - Return a pointer to the current type. This is equivalent
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/// to PointerType::get(Foo, AddrSpace).
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PointerType *getPointerTo(unsigned AddrSpace = 0);
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private:
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/// isSizedDerivedType - Derived types like structures and arrays are sized
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/// iff all of the members of the type are sized as well. Since asking for
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/// their size is relatively uncommon, move this operation out of line.
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bool isSizedDerivedType() const;
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};
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// Printing of types.
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static inline raw_ostream &operator<<(raw_ostream &OS, Type &T) {
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T.print(OS);
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return OS;
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}
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// allow isa<PointerType>(x) to work without DerivedTypes.h included.
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template <> struct isa_impl<PointerType, Type> {
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static inline bool doit(const Type &Ty) {
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return Ty.getTypeID() == Type::PointerTyID;
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}
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};
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//===----------------------------------------------------------------------===//
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// Provide specializations of GraphTraits to be able to treat a type as a
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// graph of sub types.
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template <> struct GraphTraits<Type*> {
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typedef Type NodeType;
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typedef Type::subtype_iterator ChildIteratorType;
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static inline NodeType *getEntryNode(Type *T) { return T; }
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static inline ChildIteratorType child_begin(NodeType *N) {
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return N->subtype_begin();
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}
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static inline ChildIteratorType child_end(NodeType *N) {
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return N->subtype_end();
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}
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};
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template <> struct GraphTraits<const Type*> {
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typedef const Type NodeType;
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typedef Type::subtype_iterator ChildIteratorType;
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static inline NodeType *getEntryNode(NodeType *T) { return T; }
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static inline ChildIteratorType child_begin(NodeType *N) {
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return N->subtype_begin();
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}
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static inline ChildIteratorType child_end(NodeType *N) {
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return N->subtype_end();
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}
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};
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} // End llvm namespace
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#endif
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