Constants.h revision 37eeaa729bc70258166a675ee00bbe95e608d519
148486893f46d2e12e926682a3ecb908716bc66c4Chris Lattner//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===// 29769ab22265b313171d201b5928688524a01bd87Misha Brukman// 36fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// The LLVM Compiler Infrastructure 46fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// 56fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// This file was developed by the LLVM research group and is distributed under 66fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// the University of Illinois Open Source License. See LICENSE.TXT for details. 79769ab22265b313171d201b5928688524a01bd87Misha Brukman// 86fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell//===----------------------------------------------------------------------===// 9009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner// 100b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// @file This file contains the declarations for the subclasses of Constant, 110b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// which represent the different flavors of constant values that live in LLVM. 120b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// Note that Constants are immutable (once created they never change) and are 130b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// fully shared by structural equivalence. This means that two structurally 140b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// equivalent constants will always have the same address. Constant's are 150b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// created on demand as needed and never deleted: thus clients don't have to 160b5a504d105514178c80b886321221fbe5ac1131Reid Spencer/// worry about the lifetime of the objects. 17009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner// 18009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner//===----------------------------------------------------------------------===// 19009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 2031bcdb822fe9133b1973de51519d34e5813a6184Chris Lattner#ifndef LLVM_CONSTANTS_H 2131bcdb822fe9133b1973de51519d34e5813a6184Chris Lattner#define LLVM_CONSTANTS_H 22009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 2331bcdb822fe9133b1973de51519d34e5813a6184Chris Lattner#include "llvm/Constant.h" 2452eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner#include "llvm/Type.h" 25532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer#include "llvm/ADT/APInt.h" 26009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 27d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 28d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 29009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattnerclass ArrayType; 30009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattnerclass StructType; 314cfb15331652f9a2f7e5f755485a2f6eb87a20c6Chris Lattnerclass PointerType; 329d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencerclass VectorType; 33009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 346cc89aad25155ecd93b5318414851aa46351196dChris Lattnertemplate<class ConstantClass, class TypeClass, class ValType> 356cc89aad25155ecd93b5318414851aa46351196dChris Lattnerstruct ConstantCreator; 365133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattnertemplate<class ConstantClass, class TypeClass> 375133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattnerstruct ConvertConstantType; 385133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner 3986e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 4024d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer/// This is the shared class of boolean and integer constants. This class 416b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng/// represents both boolean and integral constants. 426b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng/// @brief Class for constant integers. 436b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Shengclass ConstantInt : public Constant { 44d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner static ConstantInt *TheTrueVal, *TheFalseVal; 456b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT 46532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer ConstantInt(const IntegerType *Ty, const APInt& V); 47532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer APInt Val; 48994b9f337ba9e15f3fa537c2a2d443b890c2a617Chris Lattnerpublic: 49532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// Return the constant as an APInt value reference. This allows clients to 50532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// obtain a copy of the value, with all its precision in tact. 51532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// @brief Return the constant's value. 52532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer inline const APInt& getValue() const { 53532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val; 54532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer } 55532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer 560b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// Return the constant as a 64-bit unsigned integer value after it 57532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// has been zero extended as appropriate for the type of this constant. Note 58532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// that this method can assert if the value does not fit in 64 bits. 59532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// @deprecated 600b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @brief Return the zero extended value. 61a58ef7b6526ee30f4793fe91686899c602b4f9b9Chris Lattner inline uint64_t getZExtValue() const { 62532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.getZExtValue(); 63a58ef7b6526ee30f4793fe91686899c602b4f9b9Chris Lattner } 64c2dfb8bb909b0ba08733be94821513aef9467fa0Chris Lattner 650b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// Return the constant as a 64-bit integer value after it has been sign 66532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// sign extended as appropriate for the type of this constant. Note that 67532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// this method can assert if the value does not fit in 64 bits. 68532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer /// @deprecated 696c6b6a77c0f68d5a41e94d8ef0b1093089e683faChris Lattner /// @brief Return the sign extended value. 70a58ef7b6526ee30f4793fe91686899c602b4f9b9Chris Lattner inline int64_t getSExtValue() const { 71532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.getSExtValue(); 72a58ef7b6526ee30f4793fe91686899c602b4f9b9Chris Lattner } 73532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer 740b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// A helper method that can be used to determine if the constant contained 750b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// within is equal to a constant. This only works for very small values, 760b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// because this is all that can be represented with all types. 770b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @brief Determine if this constant's value is same as an unsigned char. 78532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer bool equalsInt(uint64_t V) const { 79b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer return Val == V; 802ce0cbbbe1d53448ddbdaaedf0da28f68dd92ea0Chris Lattner } 812ce0cbbbe1d53448ddbdaaedf0da28f68dd92ea0Chris Lattner 826b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// getTrue/getFalse - Return the singleton true/false values. 836b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng static inline ConstantInt *getTrue() { 84d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner if (TheTrueVal) return TheTrueVal; 85d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner return CreateTrueFalseVals(true); 866b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng } 876b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng static inline ConstantInt *getFalse() { 88d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner if (TheFalseVal) return TheFalseVal; 89d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner return CreateTrueFalseVals(false); 906b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng } 916b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng 92a0098386741949065f099b940819201f73cd86c2Reid Spencer /// Return a ConstantInt with the specified value for the specified type. The 930050c737c549b89f5df6743dc81646a3b7f4a94fReid Spencer /// value V will be canonicalized to a an unsigned APInt. Accessing it with 940050c737c549b89f5df6743dc81646a3b7f4a94fReid Spencer /// either getSExtValue() or getZExtValue() will yield a correctly sized and 950050c737c549b89f5df6743dc81646a3b7f4a94fReid Spencer /// signed value for the type Ty. 960b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @brief Get a ConstantInt for a specific value. 970050c737c549b89f5df6743dc81646a3b7f4a94fReid Spencer static ConstantInt *get(const Type *Ty, uint64_t V); 980b5a504d105514178c80b886321221fbe5ac1131Reid Spencer 99f57fc81faebf3eb81fb30fe17c4295d46060e03fReid Spencer /// Return a ConstantInt with the specified value and an implied Type. The 100f57fc81faebf3eb81fb30fe17c4295d46060e03fReid Spencer /// type is the integer type that corresponds to the bit width of the value. 101f57fc81faebf3eb81fb30fe17c4295d46060e03fReid Spencer static ConstantInt *get(const APInt &V); 102f57fc81faebf3eb81fb30fe17c4295d46060e03fReid Spencer 103c10305743c313558405079452138f03124e87581Reid Spencer /// getType - Specialize the getType() method to always return an IntegerType, 104c10305743c313558405079452138f03124e87581Reid Spencer /// which reduces the amount of casting needed in parts of the compiler. 105c10305743c313558405079452138f03124e87581Reid Spencer /// 106c10305743c313558405079452138f03124e87581Reid Spencer inline const IntegerType *getType() const { 107c10305743c313558405079452138f03124e87581Reid Spencer return reinterpret_cast<const IntegerType*>(Value::getType()); 108c10305743c313558405079452138f03124e87581Reid Spencer } 109c10305743c313558405079452138f03124e87581Reid Spencer 1100b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// This static method returns true if the type Ty is big enough to 1110b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// represent the value V. This can be used to avoid having the get method 1126d0483a7a365338e17537366c6c934edef2ef726Reid Spencer /// assert when V is larger than Ty can represent. Note that there are two 1136d0483a7a365338e17537366c6c934edef2ef726Reid Spencer /// versions of this method, one for unsigned and one for signed integers. 1146d0483a7a365338e17537366c6c934edef2ef726Reid Spencer /// Although ConstantInt canonicalizes everything to an unsigned integer, 1156d0483a7a365338e17537366c6c934edef2ef726Reid Spencer /// the signed version avoids callers having to convert a signed quantity 1166d0483a7a365338e17537366c6c934edef2ef726Reid Spencer /// to the appropriate unsigned type before calling the method. 1170b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @returns true if V is a valid value for type Ty 1180b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @brief Determine if the value is in range for the given type. 1199b11d518aef8e191e5e94f3503dfddbe1c0a387aReid Spencer static bool isValueValidForType(const Type *Ty, uint64_t V); 120009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner static bool isValueValidForType(const Type *Ty, int64_t V); 12193aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner 1226b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// This function will return true iff this constant represents the "null" 1236b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// value that would be returned by the getNullValue method. 124b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer /// @returns true if this is the null integer value. 1256b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @brief Determine if the value is null. 1266b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng virtual bool isNullValue() const { 1276b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng return Val == 0; 1286b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng } 1295ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner 13037eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer /// This is just a convenience method to make client code smaller for a 13137eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer /// common case. 13237eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer /// @brief Determine if the value is one. 13337eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer virtual bool isUnitValue() const { 13437eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer return Val == 1; 13537eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer } 13637eeaa729bc70258166a675ee00bbe95e608d519Reid Spencer 1376b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// This function will return true iff every bit in this constant is set 1386b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// to true. 1390b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @returns true iff this constant's bits are all set to true. 1406b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @brief Determine if the value is all ones. 141579dca12c2cfd60bc18aaadbd5331897d48fec29Reid Spencer bool isAllOnesValue() const { 142532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.isAllOnesValue(); 1436b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng } 1441680312867fffeb9369800949b809e0b9e29a914Chris Lattner 1456b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// This function will return true iff this constant represents the largest 1466b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// value that may be represented by the constant's type. 1470b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @returns true iff this is the largest value that may be represented 1480b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// by this type. 1496b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @brief Determine if the value is maximal. 150579dca12c2cfd60bc18aaadbd5331897d48fec29Reid Spencer bool isMaxValue(bool isSigned) const { 151532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer if (isSigned) 152532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.isMaxSignedValue(); 153532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer else 154532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.isMaxValue(); 155994b9f337ba9e15f3fa537c2a2d443b890c2a617Chris Lattner } 156994b9f337ba9e15f3fa537c2a2d443b890c2a617Chris Lattner 1576b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// This function will return true iff this constant represents the smallest 1586b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// value that may be represented by this constant's type. 1590b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// @returns true if this is the smallest value that may be represented by 1600b5a504d105514178c80b886321221fbe5ac1131Reid Spencer /// this type. 1616b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @brief Determine if the value is minimal. 162579dca12c2cfd60bc18aaadbd5331897d48fec29Reid Spencer bool isMinValue(bool isSigned) const { 163532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer if (isSigned) 164532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.isMinSignedValue(); 165532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer else 166532d0ce208809545dc46d2de70c0384c036470d1Reid Spencer return Val.isMinValue(); 167994b9f337ba9e15f3fa537c2a2d443b890c2a617Chris Lattner } 168994b9f337ba9e15f3fa537c2a2d443b890c2a617Chris Lattner 1696b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @returns the value for an integer constant of the given type that has all 1706b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// its bits set to true. 1716b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng /// @brief Get the all ones value 1726b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng static ConstantInt *getAllOnesValue(const Type *Ty); 1736b6b6ef1677fa71b1072c2911b4c1f9524a558c9Zhou Sheng 174b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer /// @brief Methods to support type inquiry through isa, cast, and dyn_cast. 175b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer static inline bool classof(const ConstantInt *) { return true; } 17652eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 177b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer return V->getValueType() == ConstantIntVal; 1785ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner } 179d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; } 180d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattnerprivate: 181d1afbd02ef9405fb5c1575bf1d3656f434c4a956Chris Lattner static ConstantInt *CreateTrueFalseVals(bool WhichOne); 182009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner}; 183009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 184009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 18586e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 18693aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// ConstantFP - Floating Point Values [float, double] 18793aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// 188e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattnerclass ConstantFP : public Constant { 189009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner double Val; 190e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT 1913e22bed21110e9ca591a476ff2feea8790c67b13Chris Lattnerprotected: 192e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner ConstantFP(const Type *Ty, double V); 193009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattnerpublic: 19493aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// get() - Static factory methods - Return objects of the specified value 195e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static ConstantFP *get(const Type *Ty, double V); 196009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 19793aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isValueValidForType - return true if Ty is big enough to represent V. 198009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner static bool isValueValidForType(const Type *Ty, double V); 199009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner inline double getValue() const { return Val; } 2005ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner 20193aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 202cf2c4f8ae52d5f0a01ab40eda6d165f91b8de441Chris Lattner /// getNullValue. Don't depend on == for doubles to tell us it's zero, it 203cf2c4f8ae52d5f0a01ab40eda6d165f91b8de441Chris Lattner /// considers -0.0 to be null as well as 0.0. :( 2043a1eff732b36a663cdb9f07f4a9ccae6452eadcbJim Laskey virtual bool isNullValue() const; 2050eca13bf58e0a1d6b492ca257d01abc19c4024daChris Lattner 206f0fd6845eee799f62ac69297c9fd7086a0156cfaChris Lattner /// isExactlyValue - We don't rely on operator== working on double values, as 207f0fd6845eee799f62ac69297c9fd7086a0156cfaChris Lattner /// it returns true for things that are clearly not equal, like -0.0 and 0.0. 208f0fd6845eee799f62ac69297c9fd7086a0156cfaChris Lattner /// As such, this method can be used to do an exact bit-for-bit comparison of 209f0fd6845eee799f62ac69297c9fd7086a0156cfaChris Lattner /// two floating point values. 2103a1eff732b36a663cdb9f07f4a9ccae6452eadcbJim Laskey bool isExactlyValue(double V) const; 211f0fd6845eee799f62ac69297c9fd7086a0156cfaChris Lattner 21293aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 213e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static inline bool classof(const ConstantFP *) { return true; } 21452eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 215225e8dd2f512e3e6840ba7cb1570fdc4d56a853fChris Lattner return V->getValueType() == ConstantFPVal; 2165ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner } 217009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner}; 218009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 21986e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 22040bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner/// ConstantAggregateZero - All zero aggregate value 22140bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner/// 22240bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattnerclass ConstantAggregateZero : public Constant { 22340bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner friend struct ConstantCreator<ConstantAggregateZero, Type, char>; 22440bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT 22540bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattnerprotected: 22652eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner ConstantAggregateZero(const Type *Ty) 2275181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner : Constant(Ty, ConstantAggregateZeroVal, 0, 0) {} 22840bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattnerpublic: 22940bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// get() - static factory method for creating a null aggregate. It is 23040bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// illegal to call this method with a non-aggregate type. 23140bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner static Constant *get(const Type *Ty); 23240bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner 23340bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 23440bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// getNullValue. 23540bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner virtual bool isNullValue() const { return true; } 23640bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner 23740bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner virtual void destroyConstant(); 23840bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner 23940bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 24040bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// 24152eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const ConstantAggregateZero *) { return true; } 24252eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 24352eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner return V->getValueType() == ConstantAggregateZeroVal; 24440bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner } 24540bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner}; 24640bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner 247009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 24886e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 24993aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// ConstantArray - Constant Array Declarations 25093aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// 251e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattnerclass ConstantArray : public Constant { 2526cc89aad25155ecd93b5318414851aa46351196dChris Lattner friend struct ConstantCreator<ConstantArray, ArrayType, 2536cc89aad25155ecd93b5318414851aa46351196dChris Lattner std::vector<Constant*> >; 254e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT 2553e22bed21110e9ca591a476ff2feea8790c67b13Chris Lattnerprotected: 256697954c15da58bd8b186dbafdedd8b06db770201Chris Lattner ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val); 2575181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner ~ConstantArray(); 258009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattnerpublic: 25993aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// get() - Static factory methods - Return objects of the specified value 260ca705fa31d53469d2e6d0e52fa9e40d3e13a088aChris Lattner static Constant *get(const ArrayType *T, const std::vector<Constant*> &); 261df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner static Constant *get(const ArrayType *T, 262df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner Constant*const*Vals, unsigned NumVals) { 263df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner // FIXME: make this the primary ctor method. 264df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner return get(T, std::vector<Constant*>(Vals, Vals+NumVals)); 265df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner } 266efcaa42c282ae6c6ba9652c48738c334878afbc6Reid Spencer 267efcaa42c282ae6c6ba9652c48738c334878afbc6Reid Spencer /// This method constructs a ConstantArray and initializes it with a text 268461bed2b753c514ac15ff824befe585988408f45Reid Spencer /// string. The default behavior (AddNull==true) causes a null terminator to 269461bed2b753c514ac15ff824befe585988408f45Reid Spencer /// be placed at the end of the array. This effectively increases the length 270461bed2b753c514ac15ff824befe585988408f45Reid Spencer /// of the array by one (you've been warned). However, in some situations 271461bed2b753c514ac15ff824befe585988408f45Reid Spencer /// this is not desired so if AddNull==false then the string is copied without 272461bed2b753c514ac15ff824befe585988408f45Reid Spencer /// null termination. 273461bed2b753c514ac15ff824befe585988408f45Reid Spencer static Constant *get(const std::string &Initializer, bool AddNull = true); 2749769ab22265b313171d201b5928688524a01bd87Misha Brukman 27593aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getType - Specialize the getType() method to always return an ArrayType, 27693aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// which reduces the amount of casting needed in parts of the compiler. 27793aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// 278682ea21397436e49eabbe13432e527869f07b0e0Chris Lattner inline const ArrayType *getType() const { 2798b70b78ba489b090d9866e6a4084ab1e8613b527Chris Lattner return reinterpret_cast<const ArrayType*>(Value::getType()); 280682ea21397436e49eabbe13432e527869f07b0e0Chris Lattner } 281009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 2829b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner /// isString - This method returns true if the array is an array of sbyte or 2839b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner /// ubyte, and if the elements of the array are all ConstantInt's. 2849b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner bool isString() const; 2859b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner 28622c7030a0c535ed48d8465994f8f8aaf8fa76813Evan Cheng /// isCString - This method returns true if the array is a string (see 28722c7030a0c535ed48d8465994f8f8aaf8fa76813Evan Cheng /// isString) and it ends in a null byte \0 and does not contains any other 28822c7030a0c535ed48d8465994f8f8aaf8fa76813Evan Cheng /// null bytes except its terminator. 28922c7030a0c535ed48d8465994f8f8aaf8fa76813Evan Cheng bool isCString() const; 29022c7030a0c535ed48d8465994f8f8aaf8fa76813Evan Cheng 2919b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner /// getAsString - If this array is isString(), then this method converts the 2929b0a5ee5bb77b5f74320f3603750f4521d16d196Chris Lattner /// array to an std::string and returns it. Otherwise, it asserts out. 29393aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// 29493aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner std::string getAsString() const; 29593aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner 29693aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 29740bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// getNullValue. This always returns false because zero arrays are always 29840bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// created as ConstantAggregateZero objects. 29940bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner virtual bool isNullValue() const { return false; } 3000eca13bf58e0a1d6b492ca257d01abc19c4024daChris Lattner 301e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner virtual void destroyConstant(); 30240cdedecf5d871a83363cb7d69a6f6eed525651cChris Lattner virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); 303e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner 30493aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 305e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static inline bool classof(const ConstantArray *) { return true; } 30652eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 307225e8dd2f512e3e6840ba7cb1570fdc4d56a853fChris Lattner return V->getValueType() == ConstantArrayVal; 3085ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner } 309009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner}; 310009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 311009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 31286e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 313e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner// ConstantStruct - Constant Struct Declarations 314009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner// 315e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattnerclass ConstantStruct : public Constant { 3166cc89aad25155ecd93b5318414851aa46351196dChris Lattner friend struct ConstantCreator<ConstantStruct, StructType, 3176cc89aad25155ecd93b5318414851aa46351196dChris Lattner std::vector<Constant*> >; 318e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT 3193e22bed21110e9ca591a476ff2feea8790c67b13Chris Lattnerprotected: 320697954c15da58bd8b186dbafdedd8b06db770201Chris Lattner ConstantStruct(const StructType *T, const std::vector<Constant*> &Val); 3215181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner ~ConstantStruct(); 322009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattnerpublic: 32393aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// get() - Static factory methods - Return objects of the specified value 324c78631f0e2cfd7808233176c638c7f9a50ccaff2Chris Lattner /// 325ca705fa31d53469d2e6d0e52fa9e40d3e13a088aChris Lattner static Constant *get(const StructType *T, const std::vector<Constant*> &V); 326df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner static Constant *get(const std::vector<Constant*> &V, bool Packed = false); 327df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner static Constant *get(Constant*const* Vals, unsigned NumVals, 328df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner bool Packed = false) { 329df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner // FIXME: make this the primary ctor method. 330df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner return get(std::vector<Constant*>(Vals, Vals+NumVals), Packed); 331df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner } 332df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner 33393aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getType() specialization - Reduce amount of casting... 334c78631f0e2cfd7808233176c638c7f9a50ccaff2Chris Lattner /// 335682ea21397436e49eabbe13432e527869f07b0e0Chris Lattner inline const StructType *getType() const { 3368b70b78ba489b090d9866e6a4084ab1e8613b527Chris Lattner return reinterpret_cast<const StructType*>(Value::getType()); 337682ea21397436e49eabbe13432e527869f07b0e0Chris Lattner } 338009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 33993aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 34040bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// getNullValue. This always returns false because zero structs are always 34140bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner /// created as ConstantAggregateZero objects. 342a5ae71a137b9c6f458cc6c9064be787dbc5f4311Chris Lattner virtual bool isNullValue() const { 34340bbeb5d077b1bc2b933d8c8628024dfa9b428c3Chris Lattner return false; 344a5ae71a137b9c6f458cc6c9064be787dbc5f4311Chris Lattner } 3450eca13bf58e0a1d6b492ca257d01abc19c4024daChris Lattner 346e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner virtual void destroyConstant(); 34740cdedecf5d871a83363cb7d69a6f6eed525651cChris Lattner virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); 3489769ab22265b313171d201b5928688524a01bd87Misha Brukman 34993aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 350e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static inline bool classof(const ConstantStruct *) { return true; } 35152eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 352225e8dd2f512e3e6840ba7cb1570fdc4d56a853fChris Lattner return V->getValueType() == ConstantStructVal; 3535ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner } 354009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner}; 355009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner 35686e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 3579d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer/// ConstantVector - Constant Vector Declarations 358715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke/// 3599d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencerclass ConstantVector : public Constant { 3609d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer friend struct ConstantCreator<ConstantVector, VectorType, 361715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke std::vector<Constant*> >; 3629d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT 363715c90ba524e736190a6380695ab337eeb5148beBrian Gaekeprotected: 3649d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer ConstantVector(const VectorType *T, const std::vector<Constant*> &Val); 3659d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer ~ConstantVector(); 366715c90ba524e736190a6380695ab337eeb5148beBrian Gaekepublic: 367715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// get() - Static factory methods - Return objects of the specified value 3689d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer static Constant *get(const VectorType *T, const std::vector<Constant*> &); 369715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke static Constant *get(const std::vector<Constant*> &V); 370df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner static Constant *get(Constant*const* Vals, unsigned NumVals) { 371df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner // FIXME: make this the primary ctor method. 372df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner return get(std::vector<Constant*>(Vals, Vals+NumVals)); 373df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner } 374df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner 3759d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer /// getType - Specialize the getType() method to always return an VectorType, 376715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// which reduces the amount of casting needed in parts of the compiler. 377715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// 3789d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer inline const VectorType *getType() const { 3799d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer return reinterpret_cast<const VectorType*>(Value::getType()); 380715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke } 381715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke 38258513aa1c22a08118734ac799d935ea2910db35aChris Lattner /// @returns the value for an packed integer constant of the given type that 38358513aa1c22a08118734ac799d935ea2910db35aChris Lattner /// has all its bits set to true. 38458513aa1c22a08118734ac799d935ea2910db35aChris Lattner /// @brief Get the all ones value 3859d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer static ConstantVector *getAllOnesValue(const VectorType *Ty); 38658513aa1c22a08118734ac799d935ea2910db35aChris Lattner 387715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// isNullValue - Return true if this is the value that would be returned by 388715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// getNullValue. This always returns false because zero arrays are always 389715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// created as ConstantAggregateZero objects. 390715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke virtual bool isNullValue() const { return false; } 391715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke 392fa30182eb84ee70d9f52120d653d63374b99cee6Jim Laskey /// This function will return true iff every element in this packed constant 393fa30182eb84ee70d9f52120d653d63374b99cee6Jim Laskey /// is set to all ones. 394fa30182eb84ee70d9f52120d653d63374b99cee6Jim Laskey /// @returns true iff this constant's emements are all set to all ones. 395fa30182eb84ee70d9f52120d653d63374b99cee6Jim Laskey /// @brief Determine if the value is all ones. 396569cc890e8822c265cec66745791edbd510dac1cJim Laskey bool isAllOnesValue() const; 397fa30182eb84ee70d9f52120d653d63374b99cee6Jim Laskey 398715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke virtual void destroyConstant(); 39940cdedecf5d871a83363cb7d69a6f6eed525651cChris Lattner virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); 400715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke 401715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke /// Methods for support type inquiry through isa, cast, and dyn_cast: 4029d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer static inline bool classof(const ConstantVector *) { return true; } 403715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke static bool classof(const Value *V) { 4049d6565a5b1fbc4286d6ee638d8f47a3171a9ed7eReid Spencer return V->getValueType() == ConstantVectorVal; 405715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke } 406715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke}; 407715c90ba524e736190a6380695ab337eeb5148beBrian Gaeke 40886e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner//===----------------------------------------------------------------------===// 40993aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// ConstantPointerNull - a constant pointer value that points to null 41093aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner/// 41148babfa60d3ee1854f33ad93e07abb2b22cf8ab8Chris Lattnerclass ConstantPointerNull : public Constant { 4126cc89aad25155ecd93b5318414851aa46351196dChris Lattner friend struct ConstantCreator<ConstantPointerNull, PointerType, char>; 413e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT 4145ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattnerprotected: 41548babfa60d3ee1854f33ad93e07abb2b22cf8ab8Chris Lattner ConstantPointerNull(const PointerType *T) 4165181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner : Constant(reinterpret_cast<const Type*>(T), 417225e8dd2f512e3e6840ba7cb1570fdc4d56a853fChris Lattner Value::ConstantPointerNullVal, 0, 0) {} 4186cc89aad25155ecd93b5318414851aa46351196dChris Lattner 4195ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattnerpublic: 4205ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner 42193aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// get() - Static factory methods - Return objects of the specified value 422e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static ConstantPointerNull *get(const PointerType *T); 4235ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner 42493aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 42593aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getNullValue. 4260eca13bf58e0a1d6b492ca257d01abc19c4024daChris Lattner virtual bool isNullValue() const { return true; } 4270eca13bf58e0a1d6b492ca257d01abc19c4024daChris Lattner 428e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner virtual void destroyConstant(); 429e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner 4300f42ba67771627453187e44fea935d6bab7a8152Chris Lattner /// getType - Specialize the getType() method to always return an PointerType, 4310f42ba67771627453187e44fea935d6bab7a8152Chris Lattner /// which reduces the amount of casting needed in parts of the compiler. 4320f42ba67771627453187e44fea935d6bab7a8152Chris Lattner /// 4330f42ba67771627453187e44fea935d6bab7a8152Chris Lattner inline const PointerType *getType() const { 4340f42ba67771627453187e44fea935d6bab7a8152Chris Lattner return reinterpret_cast<const PointerType*>(Value::getType()); 4350f42ba67771627453187e44fea935d6bab7a8152Chris Lattner } 4360f42ba67771627453187e44fea935d6bab7a8152Chris Lattner 43793aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 438e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner static inline bool classof(const ConstantPointerNull *) { return true; } 43952eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner static bool classof(const Value *V) { 440225e8dd2f512e3e6840ba7cb1570fdc4d56a853fChris Lattner return V->getValueType() == ConstantPointerNullVal; 4415ef35fdb72f7800e65e27311e38f028e3d400693Chris Lattner } 4424cfb15331652f9a2f7e5f755485a2f6eb87a20c6Chris Lattner}; 4434cfb15331652f9a2f7e5f755485a2f6eb87a20c6Chris Lattner 444f4ba6c710c298fe9b492b9cde82ce5efd46afd5dChris Lattner 44586e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner/// ConstantExpr - a constant value that is initialized with an expression using 446eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner/// other constant values. 44786e100bd9bf1a1a838902c46de926c79c68cdde3Chris Lattner/// 448eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner/// This class uses the standard Instruction opcodes to define the various 449eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner/// constant expressions. The Opcode field for the ConstantExpr class is 450eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner/// maintained in the Value::SubclassData field. 45129ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adveclass ConstantExpr : public Constant { 4526cc89aad25155ecd93b5318414851aa46351196dChris Lattner friend struct ConstantCreator<ConstantExpr,Type, 4536cc89aad25155ecd93b5318414851aa46351196dChris Lattner std::pair<unsigned, std::vector<Constant*> > >; 4545133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner friend struct ConvertConstantType<ConstantExpr, Type>; 4559769ab22265b313171d201b5928688524a01bd87Misha Brukman 4566cc89aad25155ecd93b5318414851aa46351196dChris Lattnerprotected: 4575181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner ConstantExpr(const Type *Ty, unsigned Opcode, Use *Ops, unsigned NumOps) 458eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner : Constant(Ty, ConstantExprVal, Ops, NumOps) { 459eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner // Operation type (an Instruction opcode) is stored as the SubclassData. 4609769ab22265b313171d201b5928688524a01bd87Misha Brukman SubclassData = Opcode; 461eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner } 4625133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner 4635133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner // These private methods are used by the type resolution code to create 4645133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner // ConstantExprs in intermediate forms. 4655133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner static Constant *getTy(const Type *Ty, unsigned Opcode, 46690fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer Constant *C1, Constant *C2); 467e4d87aa2de6e52952dca73716386db09aad5a8fdReid Spencer static Constant *getCompareTy(unsigned short pred, Constant *C1, 468e4d87aa2de6e52952dca73716386db09aad5a8fdReid Spencer Constant *C2); 46946a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner static Constant *getSelectTy(const Type *Ty, 47046a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner Constant *C1, Constant *C2, Constant *C3); 4715133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner static Constant *getGetElementPtrTy(const Type *Ty, Constant *C, 472fb11053815ee4b3c6593c12aff06fefea96d7d0aChris Lattner Value* const *Idxs, unsigned NumIdxs); 47349b78a569609881811d905960baa7dd1ab801383Robert Bocchino static Constant *getExtractElementTy(const Type *Ty, Constant *Val, 47449b78a569609881811d905960baa7dd1ab801383Robert Bocchino Constant *Idx); 475f999344fa74199f5acefbc492af2b60e67d0ba24Robert Bocchino static Constant *getInsertElementTy(const Type *Ty, Constant *Val, 476f999344fa74199f5acefbc492af2b60e67d0ba24Robert Bocchino Constant *Elt, Constant *Idx); 4779fc18d24ae525a0047718d28e7a8735e8582ddb2Chris Lattner static Constant *getShuffleVectorTy(const Type *Ty, Constant *V1, 4789fc18d24ae525a0047718d28e7a8735e8582ddb2Chris Lattner Constant *V2, Constant *Mask); 4799769ab22265b313171d201b5928688524a01bd87Misha Brukman 48029ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Advepublic: 481fb242b6edc3d92daf49c7d5b2c19d81447aa61bcChris Lattner // Static methods to construct a ConstantExpr of different kinds. Note that 482baf850a51a253a39c60196343d756197bfbb27dbChris Lattner // these methods may return a object that is not an instance of the 483baf850a51a253a39c60196343d756197bfbb27dbChris Lattner // ConstantExpr class, because they will attempt to fold the constant 484baf850a51a253a39c60196343d756197bfbb27dbChris Lattner // expression into something simpler if possible. 4859769ab22265b313171d201b5928688524a01bd87Misha Brukman 48693aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Cast constant expr 4875133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner /// 488d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getTrunc (Constant *C, const Type *Ty); 489d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getSExt (Constant *C, const Type *Ty); 490d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getZExt (Constant *C, const Type *Ty); 491d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getFPTrunc (Constant *C, const Type *Ty); 492d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getFPExtend(Constant *C, const Type *Ty); 493d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getUIToFP (Constant *C, const Type *Ty); 494d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getSIToFP (Constant *C, const Type *Ty); 495d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getFPToUI (Constant *C, const Type *Ty); 496d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getFPToSI (Constant *C, const Type *Ty); 497d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getPtrToInt(Constant *C, const Type *Ty); 498d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getIntToPtr(Constant *C, const Type *Ty); 499d977d8651a5cd26a3e1088267f31cade405f2adfReid Spencer static Constant *getBitCast (Constant *C, const Type *Ty); 5003da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer 5013da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer // @brief Convenience function for getting one of the casting operations 5023da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer // using a CastOps opcode. 5033da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer static Constant *getCast( 5043da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer unsigned ops, ///< The opcode for the conversion 5053da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer Constant *C, ///< The constant to be converted 5063da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer const Type *Ty ///< The type to which the constant is converted 5073da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer ); 5083da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer 509848414e49c7600e3002a4366de52d03a9638b327Reid Spencer // @brief Create a ZExt or BitCast cast constant expression 510848414e49c7600e3002a4366de52d03a9638b327Reid Spencer static Constant *getZExtOrBitCast( 511848414e49c7600e3002a4366de52d03a9638b327Reid Spencer Constant *C, ///< The constant to zext or bitcast 512848414e49c7600e3002a4366de52d03a9638b327Reid Spencer const Type *Ty ///< The type to zext or bitcast C to 513848414e49c7600e3002a4366de52d03a9638b327Reid Spencer ); 514848414e49c7600e3002a4366de52d03a9638b327Reid Spencer 515848414e49c7600e3002a4366de52d03a9638b327Reid Spencer // @brief Create a SExt or BitCast cast constant expression 516848414e49c7600e3002a4366de52d03a9638b327Reid Spencer static Constant *getSExtOrBitCast( 51790fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer Constant *C, ///< The constant to sext or bitcast 51890fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer const Type *Ty ///< The type to sext or bitcast C to 519848414e49c7600e3002a4366de52d03a9638b327Reid Spencer ); 520848414e49c7600e3002a4366de52d03a9638b327Reid Spencer 521848414e49c7600e3002a4366de52d03a9638b327Reid Spencer // @brief Create a Trunc or BitCast cast constant expression 522848414e49c7600e3002a4366de52d03a9638b327Reid Spencer static Constant *getTruncOrBitCast( 52390fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer Constant *C, ///< The constant to trunc or bitcast 52490fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer const Type *Ty ///< The type to trunc or bitcast C to 525848414e49c7600e3002a4366de52d03a9638b327Reid Spencer ); 526848414e49c7600e3002a4366de52d03a9638b327Reid Spencer 527887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer /// @brief Create a BitCast or a PtrToInt cast constant expression 528887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer static Constant *getPointerCast( 529887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer Constant *C, ///< The pointer value to be casted (operand 0) 530887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer const Type *Ty ///< The type to which cast should be made 531887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer ); 532887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer 53384f3eab017d56b6854155f2350759dc77ac48aadReid Spencer /// @brief Create a ZExt, Bitcast or Trunc for integer -> integer casts 53484f3eab017d56b6854155f2350759dc77ac48aadReid Spencer static Constant *getIntegerCast( 53584f3eab017d56b6854155f2350759dc77ac48aadReid Spencer Constant *C, ///< The integer constant to be casted 53684f3eab017d56b6854155f2350759dc77ac48aadReid Spencer const Type *Ty, ///< The integer type to cast to 53784f3eab017d56b6854155f2350759dc77ac48aadReid Spencer bool isSigned ///< Whether C should be treated as signed or not 53884f3eab017d56b6854155f2350759dc77ac48aadReid Spencer ); 53984f3eab017d56b6854155f2350759dc77ac48aadReid Spencer 54084f3eab017d56b6854155f2350759dc77ac48aadReid Spencer /// @brief Create a FPExt, Bitcast or FPTrunc for fp -> fp casts 54184f3eab017d56b6854155f2350759dc77ac48aadReid Spencer static Constant *getFPCast( 54284f3eab017d56b6854155f2350759dc77ac48aadReid Spencer Constant *C, ///< The integer constant to be casted 54384f3eab017d56b6854155f2350759dc77ac48aadReid Spencer const Type *Ty ///< The integer type to cast to 54484f3eab017d56b6854155f2350759dc77ac48aadReid Spencer ); 54584f3eab017d56b6854155f2350759dc77ac48aadReid Spencer 5463da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer /// @brief Return true if this is a convert constant expression 5473da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer bool isCast() const; 5483da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer 5494b94f49091be8e26ce6e49db1268458995299b82Reid Spencer /// @brief Return true if this is a compare constant expression 5504b94f49091be8e26ce6e49db1268458995299b82Reid Spencer bool isCompare() const; 5514b94f49091be8e26ce6e49db1268458995299b82Reid Spencer 55246a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner /// Select constant expr 55346a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner /// 55446a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) { 55546a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner return getSelectTy(V1->getType(), C, V1, V2); 55646a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner } 55746a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner 5587be2a120659cc61e554b04815ed3f1d4f234ecafAlkis Evlogimenos /// getSizeOf constant expr - computes the size of a type in a target 559b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer /// independent way (Note: the return type is a ULong). 56060ab1402981a757c5ee785de540a5d0f85839c5dAlkis Evlogimenos /// 56160ab1402981a757c5ee785de540a5d0f85839c5dAlkis Evlogimenos static Constant *getSizeOf(const Type *Ty); 56246a57d8f144af82be46ac925f1c53a3405bcfb3aChris Lattner 5637e208904ae8eeef888c3a6eecd38daa779ca36c9Chris Lattner /// ConstantExpr::get - Return a binary or shift operator constant expression, 5647e208904ae8eeef888c3a6eecd38daa779ca36c9Chris Lattner /// folding if possible. 5655133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner /// 56690fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer static Constant *get(unsigned Opcode, Constant *C1, Constant *C2); 56790fdf9c6debbdcc61076a1e020c3dff4dc71d838Reid Spencer 568887ee06f94c5b36ddbe22f54ff816fbc13bb2703Reid Spencer /// @brief Return an ICmp or FCmp comparison operator constant expression. 569e4d87aa2de6e52952dca73716386db09aad5a8fdReid Spencer static Constant *getCompare(unsigned short pred, Constant *C1, Constant *C2); 570e8e4605021141d689493132a9c7c6fce6294937fChris Lattner 5714dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner /// ConstantExpr::get* - Return some common constants without having to 5724dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner /// specify the full Instruction::OPCODE identifier. 5734dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner /// 5744dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getNeg(Constant *C); 5754dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getNot(Constant *C); 5764dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getAdd(Constant *C1, Constant *C2); 5774dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getSub(Constant *C1, Constant *C2); 5784dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getMul(Constant *C1, Constant *C2); 5791628cec4d7fce310d9cde0bcc73997e5a71692c4Reid Spencer static Constant *getUDiv(Constant *C1, Constant *C2); 5801628cec4d7fce310d9cde0bcc73997e5a71692c4Reid Spencer static Constant *getSDiv(Constant *C1, Constant *C2); 5811628cec4d7fce310d9cde0bcc73997e5a71692c4Reid Spencer static Constant *getFDiv(Constant *C1, Constant *C2); 5820a783f783ca05c961234385f5b269d4cf03dbbdbReid Spencer static Constant *getURem(Constant *C1, Constant *C2); // unsigned rem 5830a783f783ca05c961234385f5b269d4cf03dbbdbReid Spencer static Constant *getSRem(Constant *C1, Constant *C2); // signed rem 5840a783f783ca05c961234385f5b269d4cf03dbbdbReid Spencer static Constant *getFRem(Constant *C1, Constant *C2); 5854dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getAnd(Constant *C1, Constant *C2); 5864dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getOr(Constant *C1, Constant *C2); 5874dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getXor(Constant *C1, Constant *C2); 588728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer static Constant* getICmp(unsigned short pred, Constant* LHS, Constant* RHS); 589728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer static Constant* getFCmp(unsigned short pred, Constant* LHS, Constant* RHS); 5904dcb5401e4f6248eb546e4da444ba8e8cf306666Chris Lattner static Constant *getShl(Constant *C1, Constant *C2); 5913822ff5c71478c7c90a50ca57045fb676fcb5005Reid Spencer static Constant *getLShr(Constant *C1, Constant *C2); 5923822ff5c71478c7c90a50ca57045fb676fcb5005Reid Spencer static Constant *getAShr(Constant *C1, Constant *C2); 59302140b025d821ca8cefe5086f90f4d8e0c52ae5bChris Lattner 5947fa6e666ece60455cf9d75eff6e6915bebf05cbcChris Lattner /// Getelementptr form. std::vector<Value*> is only accepted for convenience: 5957fa6e666ece60455cf9d75eff6e6915bebf05cbcChris Lattner /// all elements must be Constant's. 5965133a5cf2ee42b5a4d4c7af2d90b41af769cc307Chris Lattner /// 597fb242b6edc3d92daf49c7d5b2c19d81447aa61bcChris Lattner static Constant *getGetElementPtr(Constant *C, 598fb11053815ee4b3c6593c12aff06fefea96d7d0aChris Lattner Constant* const *IdxList, unsigned NumIdx); 5997fa6e666ece60455cf9d75eff6e6915bebf05cbcChris Lattner static Constant *getGetElementPtr(Constant *C, 600fb11053815ee4b3c6593c12aff06fefea96d7d0aChris Lattner Value* const *IdxList, unsigned NumIdx); 601df7490a27323f194b63db75c0b16708fc7c6cfbeChris Lattner 6029fc18d24ae525a0047718d28e7a8735e8582ddb2Chris Lattner static Constant *getExtractElement(Constant *Vec, Constant *Idx); 6039fc18d24ae525a0047718d28e7a8735e8582ddb2Chris Lattner static Constant *getInsertElement(Constant *Vec, Constant *Elt,Constant *Idx); 6049fc18d24ae525a0047718d28e7a8735e8582ddb2Chris Lattner static Constant *getShuffleVector(Constant *V1, Constant *V2, Constant *Mask); 605728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer 60624d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer /// Floating point negation must be implemented with f(x) = -0.0 - x. This 60724d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer /// method returns the negative zero constant for floating point or packed 60824d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer /// floating point types; for all other types, it returns the null value. 60924d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer static Constant *getZeroValueForNegationExpr(const Type *Ty); 61024d6da5fedcf39891f7d8c5b031c01324b3db545Reid Spencer 61193aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 61293aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getNullValue. 61329ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve virtual bool isNullValue() const { return false; } 6149769ab22265b313171d201b5928688524a01bd87Misha Brukman 61593aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getOpcode - Return the opcode at the root of this constant expression 616eecfea4da6771b01997d3dc9648e699b476a3079Chris Lattner unsigned getOpcode() const { return SubclassData; } 61729ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve 618728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer /// getPredicate - Return the ICMP or FCMP predicate value. Assert if this is 619728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer /// not an ICMP or FCMP constant expression. 620728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer unsigned getPredicate() const; 621728b6db6fbd3caee7fa25b377f4592160476bb9cReid Spencer 62293aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// getOpcodeName - Return a string representation for an opcode. 623e8e4605021141d689493132a9c7c6fce6294937fChris Lattner const char *getOpcodeName() const; 6249769ab22265b313171d201b5928688524a01bd87Misha Brukman 62579ce587cda552abf85f02282cf6cfe36afcaafd8Chris Lattner /// getWithOperandReplaced - Return a constant expression identical to this 62679ce587cda552abf85f02282cf6cfe36afcaafd8Chris Lattner /// one, but with the specified operand set to the specified value. 62779ce587cda552abf85f02282cf6cfe36afcaafd8Chris Lattner Constant *getWithOperandReplaced(unsigned OpNo, Constant *Op) const; 62879ce587cda552abf85f02282cf6cfe36afcaafd8Chris Lattner 6296b8408e9103328b82affbfdf3d3bca236c61f514Chris Lattner /// getWithOperands - This returns the current constant expression with the 6306b8408e9103328b82affbfdf3d3bca236c61f514Chris Lattner /// operands replaced with the specified values. The specified operands must 6316b8408e9103328b82affbfdf3d3bca236c61f514Chris Lattner /// match count and type with the existing ones. 6326b8408e9103328b82affbfdf3d3bca236c61f514Chris Lattner Constant *getWithOperands(const std::vector<Constant*> &Ops) const; 63379ce587cda552abf85f02282cf6cfe36afcaafd8Chris Lattner 634e0fbb497ee44f86ec108e4ff8787a848c6ee8655Chris Lattner virtual void destroyConstant(); 63540cdedecf5d871a83363cb7d69a6f6eed525651cChris Lattner virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); 6369769ab22265b313171d201b5928688524a01bd87Misha Brukman 63717aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner /// Override methods to provide more type information... 6389769ab22265b313171d201b5928688524a01bd87Misha Brukman inline Constant *getOperand(unsigned i) { 63917aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner return cast<Constant>(User::getOperand(i)); 64017aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner } 64117aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner inline Constant *getOperand(unsigned i) const { 64217aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner return const_cast<Constant*>(cast<Constant>(User::getOperand(i))); 64317aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner } 6449769ab22265b313171d201b5928688524a01bd87Misha Brukman 64517aefb168fb2cfffcbd7131d1529a90ae1831b1cChris Lattner 64693aeea3748b11fa213b345edf3c86275a4936a31Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 64729ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve static inline bool classof(const ConstantExpr *) { return true; } 64829ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve static inline bool classof(const Value *V) { 64952eb13c58e63e277e83f94f3015dfc0e39a211eeChris Lattner return V->getValueType() == ConstantExprVal; 65029ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve } 65129ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve}; 65229ab9f83481cd21abf3055c7c32ea1df953ae167Vikram S. Adve 653e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner 654e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner//===----------------------------------------------------------------------===// 655e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner/// UndefValue - 'undef' values are things that do not have specified contents. 656e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner/// These are used for a variety of purposes, including global variable 657e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner/// initializers and operands to instructions. 'undef' values can occur with 658e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner/// any type. 659e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner/// 660e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattnerclass UndefValue : public Constant { 661e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner friend struct ConstantCreator<UndefValue, Type, char>; 662e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner UndefValue(const UndefValue &); // DO NOT IMPLEMENT 663e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattnerprotected: 6645181ac8081dd6c7d78613a5da8829f81a81e9e63Chris Lattner UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {} 665e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattnerpublic: 666e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// get() - Static factory methods - Return an 'undef' object of the specified 667e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// type. 668e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// 669e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner static UndefValue *get(const Type *T); 670e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner 671e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// isNullValue - Return true if this is the value that would be returned by 672e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// getNullValue. 673e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner virtual bool isNullValue() const { return false; } 674e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner 675e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner virtual void destroyConstant(); 676e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner 677e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 678e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner static inline bool classof(const UndefValue *) { return true; } 679e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner static bool classof(const Value *V) { 680e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner return V->getValueType() == UndefValueVal; 681e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner } 682e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner}; 683e1e922e09007f15aa01b438e5cf6a69c5a67afe4Chris Lattner 684d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 685d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 686009505452b713ed2e3a8e99c5545a6e721c65495Chris Lattner#endif 687