include/llvm/CodeGen/ValueTypes.h - llvm - Git at Google

 //===- CodeGen/ValueTypes.h - Low-Level Target independ. types --*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines the set of low-level target independent types which various
 // values in the code generator are.  This allows the target specific behavior
 // of instructions to be described to target independent passes.
 //
 //===----------------------------------------------------------------------===//

 #ifndef LLVM_CODEGEN_VALUETYPES_H
 #define LLVM_CODEGEN_VALUETYPES_H

 #include <cassert>
 #include <string>
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/MathExtras.h"

 namespace llvm {
   class Type;

   struct MVT { // MVT = Machine Value Type
   public:
     enum SimpleValueType {
       // If you change this numbering, you must change the values in
       // ValueTypes.td as well!
       Other          =   0,   // This is a non-standard value
       i1             =   1,   // This is a 1 bit integer value
       i8             =   2,   // This is an 8 bit integer value
       i16            =   3,   // This is a 16 bit integer value
       i32            =   4,   // This is a 32 bit integer value
       i64            =   5,   // This is a 64 bit integer value
       i128           =   6,   // This is a 128 bit integer value

       FIRST_INTEGER_VALUETYPE = i1,
       LAST_INTEGER_VALUETYPE  = i128,

       f32            =   7,   // This is a 32 bit floating point value
       f64            =   8,   // This is a 64 bit floating point value
       f80            =   9,   // This is a 80 bit floating point value
       f128           =  10,   // This is a 128 bit floating point value
       ppcf128        =  11,   // This is a PPC 128-bit floating point value
       Flag           =  12,   // This is a condition code or machine flag.

       isVoid         =  13,   // This has no value

       v2i8           =  14,   //  2 x i8
       v4i8           =  15,   //  4 x i8
       v2i16          =  16,   //  2 x i16
       v8i8           =  17,   //  8 x i8
       v4i16          =  18,   //  4 x i16
       v2i32          =  19,   //  2 x i32
       v1i64          =  20,   //  1 x i64
       v16i8          =  21,   // 16 x i8
       v8i16          =  22,   //  8 x i16
       v3i32          =  23,   //  3 x i32
       v4i32          =  24,   //  4 x i32
       v2i64          =  25,   //  2 x i64

       v2f32          =  26,   //  2 x f32
       v3f32          =  27,   //  3 x f32
       v4f32          =  28,   //  4 x f32
       v2f64          =  29,   //  2 x f64

       FIRST_VECTOR_VALUETYPE = v2i8,
       LAST_VECTOR_VALUETYPE  = v2f64,

       LAST_VALUETYPE =  30,   // This always remains at the end of the list.

       // iPTRAny - An int value the size of the pointer of the current
       // target to any address space. This must only be used internal to
       // tblgen. Other than for overloading, we treat iPTRAny the same as iPTR.
       iPTRAny        =  252,

       // fAny - Any floating-point or vector floating-point value. This is used
       // for intrinsics that have overloadings based on floating-point types.
       // This is only for tblgen's consumption!
       fAny           =  253,

       // iAny - An integer or vector integer value of any bit width. This is
       // used for intrinsics that have overloadings based on integer bit widths.
       // This is only for tblgen's consumption!
       iAny           =  254,

       // iPTR - An int value the size of the pointer of the current
       // target.  This should only be used internal to tblgen!
       iPTR           =  255,

       // LastSimpleValueType - The greatest valid SimpleValueType value.
       LastSimpleValueType = 255
     };

   private:
     /// This union holds low-level value types. Valid values include any of
     /// the values in the SimpleValueType enum, or any value returned from one
     /// of the MVT methods.  Any value type equal to one of the SimpleValueType
     /// enum values is a "simple" value type.  All others are "extended".
     ///
     /// Note that simple doesn't necessary mean legal for the target machine.
     /// All legal value types must be simple, but often there are some simple
     /// value types that are not legal.
     ///
     union {
       uintptr_t V;
       SimpleValueType SimpleTy;
       const Type *LLVMTy;
     };

   public:
     MVT() {}
     MVT(SimpleValueType S) : V(S) {}

     bool operator==(const MVT VT) const {
       return getRawBits() == VT.getRawBits();
     }
     bool operator!=(const MVT VT) const {
       return getRawBits() != VT.getRawBits();
     }

     /// getFloatingPointVT - Returns the MVT that represents a floating point
     /// type with the given number of bits.  There are two floating point types
     /// with 128 bits - this returns f128 rather than ppcf128.
     static MVT getFloatingPointVT(unsigned BitWidth) {
       switch (BitWidth) {
       default:
         assert(false && "Bad bit width!");
       case 32:
         return f32;
       case 64:
         return f64;
       case 80:
         return f80;
       case 128:
         return f128;
       }
     }

     /// getIntegerVT - Returns the MVT that represents an integer with the given
     /// number of bits.
     static MVT getIntegerVT(unsigned BitWidth) {
       switch (BitWidth) {
       default:
         break;
       case 1:
         return i1;
       case 8:
         return i8;
       case 16:
         return i16;
       case 32:
         return i32;
       case 64:
         return i64;
       case 128:
         return i128;
       }
       return getExtendedIntegerVT(BitWidth);
     }

     /// getVectorVT - Returns the MVT that represents a vector NumElements in
     /// length, where each element is of type VT.
     static MVT getVectorVT(MVT VT, unsigned NumElements) {
       switch (VT.V) {
       default:
         break;
       case i8:
         if (NumElements == 2)  return v2i8;
         if (NumElements == 4)  return v4i8;
         if (NumElements == 8)  return v8i8;
         if (NumElements == 16) return v16i8;
         break;
       case i16:
         if (NumElements == 2)  return v2i16;
         if (NumElements == 4)  return v4i16;
         if (NumElements == 8)  return v8i16;
         break;
       case i32:
         if (NumElements == 2)  return v2i32;
         if (NumElements == 3)  return v3i32;
         if (NumElements == 4)  return v4i32;
         break;
       case i64:
         if (NumElements == 1)  return v1i64;
         if (NumElements == 2)  return v2i64;
         break;
       case f32:
         if (NumElements == 2)  return v2f32;
         if (NumElements == 3)  return v3f32;
         if (NumElements == 4)  return v4f32;
         break;
       case f64:
         if (NumElements == 2)  return v2f64;
         break;
       }
       return getExtendedVectorVT(VT, NumElements);
     }

     /// getIntVectorWithNumElements - Return any integer vector type that has
     /// the specified number of elements.
     static MVT getIntVectorWithNumElements(unsigned NumElts) {
       switch (NumElts) {
       default: return getVectorVT(i8, NumElts);
       case  1: return v1i64;
       case  2: return v2i32;
       case  3: return v3i32;
       case  4: return v4i16;
       case  8: return v8i8;
       case 16: return v16i8;
       }
     }

     /// isSimple - Test if the given MVT is simple (as opposed to being
     /// extended).
     bool isSimple() const {
       return V <= LastSimpleValueType;
     }

     /// isExtended - Test if the given MVT is extended (as opposed to
     /// being simple).
     bool isExtended() const {
       return !isSimple();
     }

     /// isFloatingPoint - Return true if this is a FP, or a vector FP type.
     bool isFloatingPoint() const {
       return isSimple() ?
              ((SimpleTy >= f32 && SimpleTy <= ppcf128) ||
               (SimpleTy >= v2f32 && SimpleTy <= v2f64)) :
              isExtendedFloatingPoint();
     }

     /// isInteger - Return true if this is an integer, or a vector integer type.
     bool isInteger() const {
       return isSimple() ?
              ((SimpleTy >= FIRST_INTEGER_VALUETYPE &&
                SimpleTy <= LAST_INTEGER_VALUETYPE) ||
               (SimpleTy >= v2i8 && SimpleTy <= v2i64)) :
              isExtendedInteger();
     }

     /// isVector - Return true if this is a vector value type.
     bool isVector() const {
       return isSimple() ?
              (SimpleTy >= FIRST_VECTOR_VALUETYPE &&
               SimpleTy <= LAST_VECTOR_VALUETYPE) :
              isExtendedVector();
     }

     /// is64BitVector - Return true if this is a 64-bit vector type.
     bool is64BitVector() const {
       return isSimple() ?
              (SimpleTy==v8i8 || SimpleTy==v4i16 || SimpleTy==v2i32 ||
               SimpleTy==v1i64 || SimpleTy==v2f32) :
              isExtended64BitVector();
     }

     /// is128BitVector - Return true if this is a 128-bit vector type.
     bool is128BitVector() const {
       return isSimple() ?
              (SimpleTy==v16i8 || SimpleTy==v8i16 || SimpleTy==v4i32 ||
               SimpleTy==v2i64 || SimpleTy==v4f32 || SimpleTy==v2f64) :
              isExtended128BitVector();
     }

     /// isByteSized - Return true if the bit size is a multiple of 8.
     bool isByteSized() const {
       return (getSizeInBits() & 7) == 0;
     }

     /// isRound - Return true if the size is a power-of-two number of bytes.
     bool isRound() const {
       unsigned BitSize = getSizeInBits();
       return BitSize >= 8 && !(BitSize & (BitSize - 1));
     }

     /// bitsEq - Return true if this has the same number of bits as VT.
     bool bitsEq(MVT VT) const {
       return getSizeInBits() == VT.getSizeInBits();
     }

     /// bitsGT - Return true if this has more bits than VT.
     bool bitsGT(MVT VT) const {
       return getSizeInBits() > VT.getSizeInBits();
     }

     /// bitsGE - Return true if this has no less bits than VT.
     bool bitsGE(MVT VT) const {
       return getSizeInBits() >= VT.getSizeInBits();
     }

     /// bitsLT - Return true if this has less bits than VT.
     bool bitsLT(MVT VT) const {
       return getSizeInBits() < VT.getSizeInBits();
     }

     /// bitsLE - Return true if this has no more bits than VT.
     bool bitsLE(MVT VT) const {
       return getSizeInBits() <= VT.getSizeInBits();
     }


     /// getSimpleVT - Return the SimpleValueType held in the specified
     /// simple MVT.
     SimpleValueType getSimpleVT() const {
       assert(isSimple() && "Expected a SimpleValueType!");
       return SimpleTy;
     }

     /// getVectorElementType - Given a vector type, return the type of
     /// each element.
     MVT getVectorElementType() const {
       assert(isVector() && "Invalid vector type!");
       switch (V) {
       default:
         return getExtendedVectorElementType();
       case v2i8 :
       case v4i8 :
       case v8i8 :
       case v16i8: return i8;
       case v2i16:
       case v4i16:
       case v8i16: return i16;
       case v2i32:
       case v3i32:
       case v4i32: return i32;
       case v1i64:
       case v2i64: return i64;
       case v2f32:
       case v3f32:
       case v4f32: return f32;
       case v2f64: return f64;
       }
     }

     /// getVectorNumElements - Given a vector type, return the number of
     /// elements it contains.
     unsigned getVectorNumElements() const {
       assert(isVector() && "Invalid vector type!");
       switch (V) {
       default:
         return getExtendedVectorNumElements();
       case v16i8: return 16;
       case v8i8 :
       case v8i16: return 8;
       case v4i8:
       case v4i16:
       case v4i32:
       case v4f32: return 4;
       case v3i32:
       case v3f32: return 3;
       case v2i8:
       case v2i16:
       case v2i32:
       case v2i64:
       case v2f32:
       case v2f64: return 2;
       case v1i64: return 1;
       }
     }

     /// getSizeInBits - Return the size of the specified value type in bits.
     unsigned getSizeInBits() const {
       switch (V) {
       case iPTR:
         assert(0 && "Value type size is target-dependent. Ask TLI.");
       case iPTRAny:
       case iAny:
       case fAny:
         assert(0 && "Value type is overloaded.");
       default:
         return getExtendedSizeInBits();
       case i1  :  return 1;
       case i8  :  return 8;
       case i16 :
       case v2i8:  return 16;
       case f32 :
       case i32 :
       case v4i8:
       case v2i16: return 32;
       case f64 :
       case i64 :
       case v8i8:
       case v4i16:
       case v2i32:
       case v1i64:
       case v2f32: return 64;
       case f80 :  return 80;
       case v3i32:
       case v3f32: return 96;
       case f128:
       case ppcf128:
       case i128:
       case v16i8:
       case v8i16:
       case v4i32:
       case v2i64:
       case v4f32:
       case v2f64: return 128;
       }
     }

     /// getStoreSizeInBits - Return the number of bits overwritten by a store
     /// of the specified value type.
     unsigned getStoreSizeInBits() const {
       return (getSizeInBits() + 7)/8*8;
     }

     /// getRoundIntegerType - Rounds the bit-width of the given integer MVT up
     /// to the nearest power of two (and at least to eight), and returns the
     /// integer MVT with that number of bits.
     MVT getRoundIntegerType() const {
       assert(isInteger() && !isVector() && "Invalid integer type!");
       unsigned BitWidth = getSizeInBits();
       if (BitWidth <= 8)
         return i8;
       else
         return getIntegerVT(1 << Log2_32_Ceil(BitWidth));
     }

     /// isPow2VectorType - Retuns true if the given vector is a power of 2.
     bool isPow2VectorType() const {
       unsigned NElts = getVectorNumElements();
       return !(NElts & (NElts - 1));
     }

     /// getPow2VectorType - Widens the length of the given vector MVT up to
     /// the nearest power of 2 and returns that type.
     MVT getPow2VectorType() const {
       if (!isPow2VectorType()) {
         unsigned NElts = getVectorNumElements();
         unsigned Pow2NElts = 1 <<  Log2_32_Ceil(NElts);
         return MVT::getVectorVT(getVectorElementType(), Pow2NElts);
       }
       else {
         return *this;
       }
     }

     /// getMVTString - This function returns value type as a string,
     /// e.g. "i32".
     std::string getMVTString() const;

     /// getTypeForMVT - This method returns an LLVM type corresponding to the
     /// specified MVT.  For integer types, this returns an unsigned type.  Note
     /// that this will abort for types that cannot be represented.
     const Type *getTypeForMVT() const;

     /// getMVT - Return the value type corresponding to the specified type.
     /// This returns all pointers as iPTR.  If HandleUnknown is true, unknown
     /// types are returned as Other, otherwise they are invalid.
     static MVT getMVT(const Type *Ty, bool HandleUnknown = false);

     /// getRawBits - Represent the type as a bunch of bits.
     uintptr_t getRawBits() const { return V; }

     /// compareRawBits - A meaningless but well-behaved order, useful for
     /// constructing containers.
     struct compareRawBits {
       bool operator()(MVT L, MVT R) const {
         return L.getRawBits() < R.getRawBits();
       }
     };

   private:
     // Methods for handling the Extended-type case in functions above.
     // These are all out-of-line to prevent users of this header file
     // from having a dependency on Type.h.
     static MVT getExtendedIntegerVT(unsigned BitWidth);
     static MVT getExtendedVectorVT(MVT VT, unsigned NumElements);
     bool isExtendedFloatingPoint() const;
     bool isExtendedInteger() const;
     bool isExtendedVector() const;
     bool isExtended64BitVector() const;
     bool isExtended128BitVector() const;
     MVT getExtendedVectorElementType() const;
     unsigned getExtendedVectorNumElements() const;
     unsigned getExtendedSizeInBits() const;
   };

 } // End llvm namespace

 #endif
	//===- CodeGen/ValueTypes.h - Low-Level Target independ. types --- C++ --===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// This file defines the set of low-level target independent types which various
	// values in the code generator are. This allows the target specific behavior
	// of instructions to be described to target independent passes.
	//
	//===----------------------------------------------------------------------===//

	#ifndef LLVM_CODEGEN_VALUETYPES_H
	#define LLVM_CODEGEN_VALUETYPES_H

	#include <cassert>
	#include <string>
	#include "llvm/Support/DataTypes.h"
	#include "llvm/Support/MathExtras.h"

	namespace llvm {
	class Type;

	struct MVT { // MVT = Machine Value Type
	public:
	enum SimpleValueType {
	// If you change this numbering, you must change the values in
	// ValueTypes.td as well!
	Other = 0, // This is a non-standard value
	i1 = 1, // This is a 1 bit integer value
	i8 = 2, // This is an 8 bit integer value
	i16 = 3, // This is a 16 bit integer value
	i32 = 4, // This is a 32 bit integer value
	i64 = 5, // This is a 64 bit integer value
	i128 = 6, // This is a 128 bit integer value

	FIRST_INTEGER_VALUETYPE = i1,
	LAST_INTEGER_VALUETYPE = i128,

	f32 = 7, // This is a 32 bit floating point value
	f64 = 8, // This is a 64 bit floating point value
	f80 = 9, // This is a 80 bit floating point value
	f128 = 10, // This is a 128 bit floating point value
	ppcf128 = 11, // This is a PPC 128-bit floating point value
	Flag = 12, // This is a condition code or machine flag.

	isVoid = 13, // This has no value

	v2i8 = 14, // 2 x i8
	v4i8 = 15, // 4 x i8
	v2i16 = 16, // 2 x i16
	v8i8 = 17, // 8 x i8
	v4i16 = 18, // 4 x i16
	v2i32 = 19, // 2 x i32
	v1i64 = 20, // 1 x i64
	v16i8 = 21, // 16 x i8
	v8i16 = 22, // 8 x i16
	v3i32 = 23, // 3 x i32
	v4i32 = 24, // 4 x i32
	v2i64 = 25, // 2 x i64

	v2f32 = 26, // 2 x f32
	v3f32 = 27, // 3 x f32
	v4f32 = 28, // 4 x f32
	v2f64 = 29, // 2 x f64

	FIRST_VECTOR_VALUETYPE = v2i8,
	LAST_VECTOR_VALUETYPE = v2f64,

	LAST_VALUETYPE = 30, // This always remains at the end of the list.

	// iPTRAny - An int value the size of the pointer of the current
	// target to any address space. This must only be used internal to
	// tblgen. Other than for overloading, we treat iPTRAny the same as iPTR.
	iPTRAny = 252,

	// fAny - Any floating-point or vector floating-point value. This is used
	// for intrinsics that have overloadings based on floating-point types.
	// This is only for tblgen's consumption!
	fAny = 253,

	// iAny - An integer or vector integer value of any bit width. This is
	// used for intrinsics that have overloadings based on integer bit widths.
	// This is only for tblgen's consumption!
	iAny = 254,

	// iPTR - An int value the size of the pointer of the current
	// target. This should only be used internal to tblgen!
	iPTR = 255,

	// LastSimpleValueType - The greatest valid SimpleValueType value.
	LastSimpleValueType = 255
	};

	private:
	/// This union holds low-level value types. Valid values include any of
	/// the values in the SimpleValueType enum, or any value returned from one
	/// of the MVT methods. Any value type equal to one of the SimpleValueType
	/// enum values is a "simple" value type. All others are "extended".
	///
	/// Note that simple doesn't necessary mean legal for the target machine.
	/// All legal value types must be simple, but often there are some simple
	/// value types that are not legal.
	///
	union {
	uintptr_t V;
	SimpleValueType SimpleTy;
	const Type *LLVMTy;
	};

	public:
	MVT() {}
	MVT(SimpleValueType S) : V(S) {}

	bool operator==(const MVT VT) const {
	return getRawBits() == VT.getRawBits();
	}
	bool operator!=(const MVT VT) const {
	return getRawBits() != VT.getRawBits();
	}

	/// getFloatingPointVT - Returns the MVT that represents a floating point
	/// type with the given number of bits. There are two floating point types
	/// with 128 bits - this returns f128 rather than ppcf128.
	static MVT getFloatingPointVT(unsigned BitWidth) {
	switch (BitWidth) {
	default:
	assert(false && "Bad bit width!");
	case 32:
	return f32;
	case 64:
	return f64;
	case 80:
	return f80;
	case 128:
	return f128;
	}
	}

	/// getIntegerVT - Returns the MVT that represents an integer with the given
	/// number of bits.
	static MVT getIntegerVT(unsigned BitWidth) {
	switch (BitWidth) {
	default:
	break;
	case 1:
	return i1;
	case 8:
	return i8;
	case 16:
	return i16;
	case 32:
	return i32;
	case 64:
	return i64;
	case 128:
	return i128;
	}
	return getExtendedIntegerVT(BitWidth);
	}

	/// getVectorVT - Returns the MVT that represents a vector NumElements in
	/// length, where each element is of type VT.
	static MVT getVectorVT(MVT VT, unsigned NumElements) {
	switch (VT.V) {
	default:
	break;
	case i8:
	if (NumElements == 2) return v2i8;
	if (NumElements == 4) return v4i8;
	if (NumElements == 8) return v8i8;
	if (NumElements == 16) return v16i8;
	break;
	case i16:
	if (NumElements == 2) return v2i16;
	if (NumElements == 4) return v4i16;
	if (NumElements == 8) return v8i16;
	break;
	case i32:
	if (NumElements == 2) return v2i32;
	if (NumElements == 3) return v3i32;
	if (NumElements == 4) return v4i32;
	break;
	case i64:
	if (NumElements == 1) return v1i64;
	if (NumElements == 2) return v2i64;
	break;
	case f32:
	if (NumElements == 2) return v2f32;
	if (NumElements == 3) return v3f32;
	if (NumElements == 4) return v4f32;
	break;
	case f64:
	if (NumElements == 2) return v2f64;
	break;
	}
	return getExtendedVectorVT(VT, NumElements);
	}

	/// getIntVectorWithNumElements - Return any integer vector type that has
	/// the specified number of elements.
	static MVT getIntVectorWithNumElements(unsigned NumElts) {
	switch (NumElts) {
	default: return getVectorVT(i8, NumElts);
	case 1: return v1i64;
	case 2: return v2i32;
	case 3: return v3i32;
	case 4: return v4i16;
	case 8: return v8i8;
	case 16: return v16i8;
	}
	}

	/// isSimple - Test if the given MVT is simple (as opposed to being
	/// extended).
	bool isSimple() const {
	return V <= LastSimpleValueType;
	}

	/// isExtended - Test if the given MVT is extended (as opposed to
	/// being simple).
	bool isExtended() const {
	return !isSimple();
	}

	/// isFloatingPoint - Return true if this is a FP, or a vector FP type.
	bool isFloatingPoint() const {
	return isSimple() ?
	((SimpleTy >= f32 && SimpleTy <= ppcf128) \|\|
	(SimpleTy >= v2f32 && SimpleTy <= v2f64)) :
	isExtendedFloatingPoint();
	}

	/// isInteger - Return true if this is an integer, or a vector integer type.
	bool isInteger() const {
	return isSimple() ?
	((SimpleTy >= FIRST_INTEGER_VALUETYPE &&
	SimpleTy <= LAST_INTEGER_VALUETYPE) \|\|
	(SimpleTy >= v2i8 && SimpleTy <= v2i64)) :
	isExtendedInteger();
	}

	/// isVector - Return true if this is a vector value type.
	bool isVector() const {
	return isSimple() ?
	(SimpleTy >= FIRST_VECTOR_VALUETYPE &&
	SimpleTy <= LAST_VECTOR_VALUETYPE) :
	isExtendedVector();
	}

	/// is64BitVector - Return true if this is a 64-bit vector type.
	bool is64BitVector() const {
	return isSimple() ?
	(SimpleTy==v8i8 \|\| SimpleTy==v4i16 \|\| SimpleTy==v2i32 \|\|
	SimpleTy==v1i64 \|\| SimpleTy==v2f32) :
	isExtended64BitVector();
	}

	/// is128BitVector - Return true if this is a 128-bit vector type.
	bool is128BitVector() const {
	return isSimple() ?
	(SimpleTy==v16i8 \|\| SimpleTy==v8i16 \|\| SimpleTy==v4i32 \|\|
	SimpleTy==v2i64 \|\| SimpleTy==v4f32 \|\| SimpleTy==v2f64) :
	isExtended128BitVector();
	}

	/// isByteSized - Return true if the bit size is a multiple of 8.
	bool isByteSized() const {
	return (getSizeInBits() & 7) == 0;
	}

	/// isRound - Return true if the size is a power-of-two number of bytes.
	bool isRound() const {
	unsigned BitSize = getSizeInBits();
	return BitSize >= 8 && !(BitSize & (BitSize - 1));
	}

	/// bitsEq - Return true if this has the same number of bits as VT.
	bool bitsEq(MVT VT) const {
	return getSizeInBits() == VT.getSizeInBits();
	}

	/// bitsGT - Return true if this has more bits than VT.
	bool bitsGT(MVT VT) const {
	return getSizeInBits() > VT.getSizeInBits();
	}

	/// bitsGE - Return true if this has no less bits than VT.
	bool bitsGE(MVT VT) const {
	return getSizeInBits() >= VT.getSizeInBits();
	}

	/// bitsLT - Return true if this has less bits than VT.
	bool bitsLT(MVT VT) const {
	return getSizeInBits() < VT.getSizeInBits();
	}

	/// bitsLE - Return true if this has no more bits than VT.
	bool bitsLE(MVT VT) const {
	return getSizeInBits() <= VT.getSizeInBits();
	}


	/// getSimpleVT - Return the SimpleValueType held in the specified
	/// simple MVT.
	SimpleValueType getSimpleVT() const {
	assert(isSimple() && "Expected a SimpleValueType!");
	return SimpleTy;
	}

	/// getVectorElementType - Given a vector type, return the type of
	/// each element.
	MVT getVectorElementType() const {
	assert(isVector() && "Invalid vector type!");
	switch (V) {
	default:
	return getExtendedVectorElementType();
	case v2i8 :
	case v4i8 :
	case v8i8 :
	case v16i8: return i8;
	case v2i16:
	case v4i16:
	case v8i16: return i16;
	case v2i32:
	case v3i32:
	case v4i32: return i32;
	case v1i64:
	case v2i64: return i64;
	case v2f32:
	case v3f32:
	case v4f32: return f32;
	case v2f64: return f64;
	}
	}

	/// getVectorNumElements - Given a vector type, return the number of
	/// elements it contains.
	unsigned getVectorNumElements() const {
	assert(isVector() && "Invalid vector type!");
	switch (V) {
	default:
	return getExtendedVectorNumElements();
	case v16i8: return 16;
	case v8i8 :
	case v8i16: return 8;
	case v4i8:
	case v4i16:
	case v4i32:
	case v4f32: return 4;
	case v3i32:
	case v3f32: return 3;
	case v2i8:
	case v2i16:
	case v2i32:
	case v2i64:
	case v2f32:
	case v2f64: return 2;
	case v1i64: return 1;
	}
	}

	/// getSizeInBits - Return the size of the specified value type in bits.
	unsigned getSizeInBits() const {
	switch (V) {
	case iPTR:
	assert(0 && "Value type size is target-dependent. Ask TLI.");
	case iPTRAny:
	case iAny:
	case fAny:
	assert(0 && "Value type is overloaded.");
	default:
	return getExtendedSizeInBits();
	case i1 : return 1;
	case i8 : return 8;
	case i16 :
	case v2i8: return 16;
	case f32 :
	case i32 :
	case v4i8:
	case v2i16: return 32;
	case f64 :
	case i64 :
	case v8i8:
	case v4i16:
	case v2i32:
	case v1i64:
	case v2f32: return 64;
	case f80 : return 80;
	case v3i32:
	case v3f32: return 96;
	case f128:
	case ppcf128:
	case i128:
	case v16i8:
	case v8i16:
	case v4i32:
	case v2i64:
	case v4f32:
	case v2f64: return 128;
	}
	}

	/// getStoreSizeInBits - Return the number of bits overwritten by a store
	/// of the specified value type.
	unsigned getStoreSizeInBits() const {
	return (getSizeInBits() + 7)/8*8;
	}

	/// getRoundIntegerType - Rounds the bit-width of the given integer MVT up
	/// to the nearest power of two (and at least to eight), and returns the
	/// integer MVT with that number of bits.
	MVT getRoundIntegerType() const {
	assert(isInteger() && !isVector() && "Invalid integer type!");
	unsigned BitWidth = getSizeInBits();
	if (BitWidth <= 8)
	return i8;
	else
	return getIntegerVT(1 << Log2_32_Ceil(BitWidth));
	}

	/// isPow2VectorType - Retuns true if the given vector is a power of 2.
	bool isPow2VectorType() const {
	unsigned NElts = getVectorNumElements();
	return !(NElts & (NElts - 1));
	}

	/// getPow2VectorType - Widens the length of the given vector MVT up to
	/// the nearest power of 2 and returns that type.
	MVT getPow2VectorType() const {
	if (!isPow2VectorType()) {
	unsigned NElts = getVectorNumElements();
	unsigned Pow2NElts = 1 << Log2_32_Ceil(NElts);
	return MVT::getVectorVT(getVectorElementType(), Pow2NElts);
	}
	else {
	return *this;
	}
	}

	/// getMVTString - This function returns value type as a string,
	/// e.g. "i32".
	std::string getMVTString() const;

	/// getTypeForMVT - This method returns an LLVM type corresponding to the
	/// specified MVT. For integer types, this returns an unsigned type. Note
	/// that this will abort for types that cannot be represented.
	const Type *getTypeForMVT() const;

	/// getMVT - Return the value type corresponding to the specified type.
	/// This returns all pointers as iPTR. If HandleUnknown is true, unknown
	/// types are returned as Other, otherwise they are invalid.
	static MVT getMVT(const Type *Ty, bool HandleUnknown = false);

	/// getRawBits - Represent the type as a bunch of bits.
	uintptr_t getRawBits() const { return V; }

	/// compareRawBits - A meaningless but well-behaved order, useful for
	/// constructing containers.
	struct compareRawBits {
	bool operator()(MVT L, MVT R) const {
	return L.getRawBits() < R.getRawBits();
	}
	};

	private:
	// Methods for handling the Extended-type case in functions above.
	// These are all out-of-line to prevent users of this header file
	// from having a dependency on Type.h.
	static MVT getExtendedIntegerVT(unsigned BitWidth);
	static MVT getExtendedVectorVT(MVT VT, unsigned NumElements);
	bool isExtendedFloatingPoint() const;
	bool isExtendedInteger() const;
	bool isExtendedVector() const;
	bool isExtended64BitVector() const;
	bool isExtended128BitVector() const;
	MVT getExtendedVectorElementType() const;
	unsigned getExtendedVectorNumElements() const;
	unsigned getExtendedSizeInBits() const;
	};

	} // End llvm namespace

	#endif