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      1 /*
      2  * Copyright 2010-2012, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_TYPE_H_  // NOLINT
     18 #define _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_TYPE_H_
     19 
     20 #include <list>
     21 #include <set>
     22 #include <string>
     23 #include <sstream>
     24 
     25 #include "clang/AST/Decl.h"
     26 #include "clang/AST/Type.h"
     27 
     28 #include "llvm/ADT/SmallPtrSet.h"
     29 #include "llvm/ADT/StringMap.h"
     30 #include "llvm/ADT/StringRef.h"
     31 
     32 #include "llvm/Support/ManagedStatic.h"
     33 
     34 #include "slang_rs_exportable.h"
     35 
     36 #define RS_PADDING_FIELD_NAME ".rs.padding"
     37 
     38 inline const clang::Type* GetCanonicalType(const clang::Type* T) {
     39   if (T == nullptr) {
     40     return  nullptr;
     41   }
     42   return T->getCanonicalTypeInternal().getTypePtr();
     43 }
     44 
     45 inline const clang::Type* GetCanonicalType(clang::QualType QT) {
     46   return GetCanonicalType(QT.getTypePtr());
     47 }
     48 
     49 inline const clang::Type* GetExtVectorElementType(const clang::ExtVectorType *T) {
     50   if (T == nullptr) {
     51     return nullptr;
     52   }
     53   return GetCanonicalType(T->getElementType());
     54 }
     55 
     56 inline const clang::Type* GetPointeeType(const clang::PointerType *T) {
     57   if (T == nullptr) {
     58     return nullptr;
     59   }
     60   return GetCanonicalType(T->getPointeeType());
     61 }
     62 
     63 inline const clang::Type* GetConstantArrayElementType(const clang::ConstantArrayType *T) {
     64   if (T == nullptr) {
     65     return nullptr;
     66   }
     67   return GetCanonicalType(T->getElementType());
     68 }
     69 
     70 
     71 namespace llvm {
     72   class Type;
     73 }   // namespace llvm
     74 
     75 namespace slang {
     76 
     77 class RSContext;
     78 
     79 // Broad grouping of the data types
     80 enum DataTypeCategory {
     81     PrimitiveDataType,
     82     MatrixDataType,
     83     ObjectDataType
     84 };
     85 
     86 // Denote whether a particular export is intended for a legacy kernel argument.
     87 // NotLegacyKernelArgument - not a legacy kernel argument (might not even be a
     88 //                           kernel argument).
     89 // LegacyKernelArgument    - legacy pass-by-reference kernel argument using
     90 //                           pointers and no kernel attribute.
     91 enum ExportKind {
     92    NotLegacyKernelArgument,
     93    LegacyKernelArgument
     94  };
     95 
     96 
     97 // From graphics/java/android/renderscript/Element.java: Element.DataType
     98 /* NOTE: The values of the enums are found compiled in the bit code (i.e. as
     99  * values, not symbolic.  When adding new types, you must add them to the end.
    100  * If removing types, you can't re-use the integer value.
    101  *
    102  * TODO: but if you do this, you won't be able to keep using First* & Last*
    103  * for validation.
    104  *
    105  * IMPORTANT: This enum should correspond one-for-one to the entries found in the
    106  * gReflectionsTypes table (except for the two negative numbers).  Don't edit one without
    107  * the other.
    108  */
    109 enum DataType {
    110     DataTypeIsStruct = -2,
    111     DataTypeUnknown = -1,
    112 
    113     DataTypeFloat16 = 0,
    114     DataTypeFloat32 = 1,
    115     DataTypeFloat64 = 2,
    116     DataTypeSigned8 = 3,
    117     DataTypeSigned16 = 4,
    118     DataTypeSigned32 = 5,
    119     DataTypeSigned64 = 6,
    120     DataTypeUnsigned8 = 7,
    121     DataTypeUnsigned16 = 8,
    122     DataTypeUnsigned32 = 9,
    123     DataTypeUnsigned64 = 10,
    124     DataTypeBoolean = 11,
    125     DataTypeUnsigned565 = 12,
    126     DataTypeUnsigned5551 = 13,
    127     DataTypeUnsigned4444 = 14,
    128 
    129     DataTypeRSMatrix2x2 = 15,
    130     DataTypeRSMatrix3x3 = 16,
    131     DataTypeRSMatrix4x4 = 17,
    132 
    133     DataTypeRSElement = 18,
    134     DataTypeRSType = 19,
    135     DataTypeRSAllocation = 20,
    136     DataTypeRSSampler = 21,
    137     DataTypeRSScript = 22,
    138     DataTypeRSMesh = 23,
    139     DataTypeRSPath = 24,
    140     DataTypeRSProgramFragment = 25,
    141     DataTypeRSProgramVertex = 26,
    142     DataTypeRSProgramRaster = 27,
    143     DataTypeRSProgramStore = 28,
    144     DataTypeRSFont = 29,
    145 
    146     // This should always be last and correspond to the size of the gReflectionTypes table.
    147     DataTypeMax
    148 };
    149 
    150 typedef struct {
    151     // The data type category
    152     DataTypeCategory category;
    153     // "Common name" in script (C99)
    154     const char * s_name;
    155     // The element name in RenderScript
    156     const char * rs_type;
    157     // The short element name in RenderScript
    158     const char * rs_short_type;
    159     // The size of the type in bits
    160     uint32_t size_in_bits;
    161     // The reflected name in C code
    162     const char * c_name;
    163     // The reflected name in Java code
    164     const char * java_name;
    165     // The array type that is compatible with Allocations of our type,
    166     // for use with copyTo(), copyFrom()
    167     const char * java_array_element_name;
    168     // The prefix for C vector types
    169     const char * rs_c_vector_prefix;
    170     // The prefix for Java vector types
    171     const char * rs_java_vector_prefix;
    172     // Indicates an unsigned type undergoing Java promotion
    173     bool java_promotion;
    174 } RSReflectionType;
    175 
    176 
    177 typedef struct RSReflectionTypeData_rec {
    178     const RSReflectionType *type;
    179     uint32_t vecSize;   // number of elements; one if not a vector
    180     bool isPointer;
    181     uint32_t arraySize; // number of elements; zero if not an array
    182 
    183     // Subelements
    184     //std::vector<const struct RSReflectionTypeData_rec *> fields;
    185     //std::vector< std::string > fieldNames;
    186     //std::vector< uint32_t> fieldOffsetBytes;
    187 } RSReflectionTypeData;
    188 
    189 // Make a name for types that are too complicated to create the real names.
    190 std::string CreateDummyName(const char *type, const std::string &name);
    191 
    192 inline bool IsDummyName(const llvm::StringRef &Name) {
    193   return Name.startswith("<");
    194 }
    195 
    196 class RSExportType : public RSExportable {
    197   friend class RSExportElement;
    198  public:
    199   typedef enum {
    200     ExportClassPrimitive,
    201     ExportClassPointer,
    202     ExportClassVector,
    203     ExportClassMatrix,
    204     ExportClassConstantArray,
    205     ExportClassRecord
    206   } ExportClass;
    207 
    208   void convertToRTD(RSReflectionTypeData *rtd) const;
    209 
    210  private:
    211   ExportClass mClass;
    212   std::string mName;
    213 
    214   // Cache the result after calling convertToLLVMType() at the first time
    215   mutable llvm::Type *mLLVMType;
    216 
    217  protected:
    218   RSExportType(RSContext *Context,
    219                ExportClass Class,
    220                const llvm::StringRef &Name);
    221 
    222   // Let's make it private since there're some prerequisites to call this
    223   // function.
    224   //
    225   // @T was normalized by calling RSExportType::NormalizeType().
    226   // @TypeName was retrieved from RSExportType::GetTypeName() before calling
    227   //           this.
    228   // @EK denotes whether this @T is being used for a legacy kernel argument or
    229   //     something else.
    230   //
    231   static RSExportType *Create(RSContext *Context,
    232                               const clang::Type *T,
    233                               const llvm::StringRef &TypeName,
    234                               ExportKind EK);
    235 
    236   static llvm::StringRef GetTypeName(const clang::Type *T);
    237 
    238   // This function convert the RSExportType to LLVM type. Actually, it should be
    239   // "convert Clang type to LLVM type." However, clang doesn't make this API
    240   // (lib/CodeGen/CodeGenTypes.h) public, we need to do by ourselves.
    241   //
    242   // Once we can get LLVM type, we can use LLVM to get alignment information,
    243   // allocation size of a given type and structure layout that LLVM used
    244   // (all of these information are target dependent) without dealing with these
    245   // by ourselves.
    246   virtual llvm::Type *convertToLLVMType() const = 0;
    247   // Record type may recursively reference its type definition. We need a
    248   // temporary type setup before the type construction gets done.
    249   inline void setAbstractLLVMType(llvm::Type *LLVMType) const {
    250     mLLVMType = LLVMType;
    251   }
    252 
    253   virtual ~RSExportType();
    254 
    255  public:
    256   // This function additionally verifies that the Type T is exportable.
    257   // If it is not, this function returns false. Otherwise it returns true.
    258   static bool NormalizeType(const clang::Type *&T,
    259                             llvm::StringRef &TypeName,
    260                             RSContext *Context,
    261                             const clang::VarDecl *VD,
    262                             ExportKind EK);
    263 
    264   // This function checks whether the specified type can be handled by RS/FS.
    265   // If it cannot, this function returns false. Otherwise it returns true.
    266   // Filterscript has additional restrictions on supported types.
    267   static bool ValidateType(slang::RSContext *Context, clang::ASTContext &C,
    268                            clang::QualType QT, const clang::NamedDecl *ND,
    269                            clang::SourceLocation Loc, unsigned int TargetAPI,
    270                            bool IsFilterscript, bool IsExtern);
    271 
    272   // This function ensures that the VarDecl can be properly handled by RS.
    273   // If it cannot, this function returns false. Otherwise it returns true.
    274   // Filterscript has additional restrictions on supported types.
    275   static bool ValidateVarDecl(slang::RSContext *Context, clang::VarDecl *VD,
    276                               unsigned int TargetAPI, bool IsFilterscript);
    277 
    278   // @T may not be normalized
    279   static RSExportType *Create(RSContext *Context, const clang::Type *T,
    280                               ExportKind EK,
    281                               // T is type of VD or of subobject within VD
    282                               const clang::VarDecl *VD = nullptr);
    283   static RSExportType *CreateFromDecl(RSContext *Context,
    284                                       const clang::VarDecl *VD);
    285 
    286   static const clang::Type *GetTypeOfDecl(const clang::DeclaratorDecl *DD);
    287 
    288   inline ExportClass getClass() const { return mClass; }
    289 
    290   inline llvm::Type *getLLVMType() const {
    291     if (mLLVMType == nullptr)
    292       mLLVMType = convertToLLVMType();
    293     return mLLVMType;
    294   }
    295 
    296   // Return the maximum number of bytes that may be written when this type is stored.
    297   virtual size_t getStoreSize() const;
    298 
    299   // Return the distance in bytes between successive elements of this type; it includes padding.
    300   virtual size_t getAllocSize() const;
    301 
    302   inline const std::string &getName() const { return mName; }
    303 
    304   virtual std::string getElementName() const {
    305     // Base case is actually an invalid C/Java identifier.
    306     return "@@INVALID@@";
    307   }
    308 
    309   virtual bool keep();
    310   // matchODR(): a helper function for Slang::checkODR() on ODR validation
    311   //
    312   // The LookInto parameter dictates whether to recursively validate member
    313   // types of given compound types. This currently only affects struct
    314   // (RSExportRecordType); it has no effect on primitive types, vector types,
    315   // or matrix types.
    316   //
    317   // Consider the following pseudo code of nested struct types:
    318   //
    319   // Translation unit #1:     Translation unit #2:
    320   //
    321   // struct Name(AA) {        struct Name(BB) {
    322   //   Type(aa) aa;             Type(bb) bb;
    323   // };                       };
    324   //
    325   // struct Name(A)  {        struct Name(B) {
    326   //   struct Name(AA) a;       struct Name(BB) b;
    327   // };                       };
    328   //
    329   // Case 1:
    330   // Assuming aa and bb do not match (say mismatching just in field name), but
    331   // the rest does, then the desirable behavior is to report an ODR violation
    332   // on struct BB (vs. struct AA) but not on struct B (vs. struct A), because
    333   // BB is the tightest enclosing declaration of the violation, not B.
    334   //
    335   // For this case, RSExportRecordType::matchODR() has the following behavior:
    336   //
    337   // A.matchODR(B, true) should NOT report an ODR violation;
    338   // AA.matchODR(BB, true) should report an ODR violation w.r.t. struct BB;
    339   // A.matchODR(B, false) should not report an error;
    340   // AA.matchODR(BB, false) should not report an error.
    341   //
    342   // Slang::checkODR() acts as a driver for this validation case. It calls
    343   // A.matchODR() and AA.matchODR() comparing against B and BB respectively.
    344   //
    345   // By setting LookInto true when Slang::checkODR() calls matchODR() with
    346   // the outermost compound type, and false with any recursively discovered
    347   // types, we can ensure the desirable ODR violation reporting behavior.
    348   //
    349   // Case 2:
    350   // Assuming Name(AA) != Name(BB), but the rest of the declarations match,
    351   // then the desirable behavior is to report an ODR violation on struct B
    352   // (vs. struct A).
    353   //
    354   // In this case, RSExportRecordType::matchODR() has the following behavior:
    355   //
    356   // A.matchODR(B, true) should report an ODR violation w.r.t. struct B;
    357   // because AA and BB are two different types, AA.matchODR(BB) won't be
    358   // called.
    359   //
    360   // A.matchODR(B, false) should not report an error; this happens, should
    361   // there be any more additional enclosing types for A subject to ODR check.
    362   virtual bool matchODR(const RSExportType *E, bool LookInto) const;
    363 };  // RSExportType
    364 
    365 // Primitive types
    366 class RSExportPrimitiveType : public RSExportType {
    367   friend class RSExportType;
    368   friend class RSExportElement;
    369  private:
    370   DataType mType;
    371   bool mNormalized;
    372 
    373   typedef llvm::StringMap<DataType> RSSpecificTypeMapTy;
    374   static llvm::ManagedStatic<RSSpecificTypeMapTy> RSSpecificTypeMap;
    375 
    376   static const size_t SizeOfDataTypeInBits[];
    377   // @T was normalized by calling RSExportType::NormalizeType() before calling
    378   // this.
    379   // @TypeName was retrieved from RSExportType::GetTypeName() before calling
    380   // this
    381   static RSExportPrimitiveType *Create(RSContext *Context,
    382                                        const clang::Type *T,
    383                                        const llvm::StringRef &TypeName,
    384                                        bool Normalized = false);
    385 
    386  protected:
    387   RSExportPrimitiveType(RSContext *Context,
    388                         // for derived class to set their type class
    389                         ExportClass Class,
    390                         const llvm::StringRef &Name,
    391                         DataType DT,
    392                         bool Normalized)
    393       : RSExportType(Context, Class, Name),
    394         mType(DT),
    395         mNormalized(Normalized) {
    396   }
    397 
    398   virtual llvm::Type *convertToLLVMType() const;
    399 
    400   static DataType GetDataType(RSContext *Context, const clang::Type *T);
    401 
    402  public:
    403   // T is normalized by calling RSExportType::NormalizeType() before
    404   // calling this
    405   static bool IsPrimitiveType(const clang::Type *T);
    406 
    407   // @T may not be normalized
    408   static RSExportPrimitiveType *Create(RSContext *Context,
    409                                        const clang::Type *T);
    410 
    411   static DataType GetRSSpecificType(const llvm::StringRef &TypeName);
    412   static DataType GetRSSpecificType(const clang::Type *T);
    413 
    414   static bool IsRSMatrixType(DataType DT);
    415   static bool IsRSObjectType(DataType DT);
    416   static bool IsRSObjectType(const clang::Type *T) {
    417     return IsRSObjectType(GetRSSpecificType(T));
    418   }
    419 
    420   // Determines whether T is [an array of] struct that contains at least one
    421   // RS object type within it.
    422   static bool IsStructureTypeWithRSObject(const clang::Type *T);
    423 
    424   // For a primitive type, this is the size of the type.
    425   // For a vector type (RSExportVectorType is derived from RSExportPrimitiveType),
    426   // this is the size of a single vector element (component).
    427   static size_t GetElementSizeInBits(const RSExportPrimitiveType *EPT);
    428 
    429   inline DataType getType() const { return mType; }
    430   inline bool isRSObjectType() const {
    431       return IsRSObjectType(mType);
    432   }
    433 
    434   bool matchODR(const RSExportType *E, bool LookInto) const override;
    435 
    436   static RSReflectionType *getRSReflectionType(DataType DT);
    437   static RSReflectionType *getRSReflectionType(
    438       const RSExportPrimitiveType *EPT) {
    439     return getRSReflectionType(EPT->getType());
    440   }
    441 
    442   // For a vector type, this is the size of a single element.
    443   unsigned getElementSizeInBytes() const { return (GetElementSizeInBits(this) >> 3); }
    444 
    445   std::string getElementName() const {
    446     return getRSReflectionType(this)->rs_short_type;
    447   }
    448 };  // RSExportPrimitiveType
    449 
    450 
    451 class RSExportPointerType : public RSExportType {
    452   friend class RSExportType;
    453   friend class RSExportFunc;
    454  private:
    455   const RSExportType *mPointeeType;
    456 
    457   RSExportPointerType(RSContext *Context,
    458                       const llvm::StringRef &Name,
    459                       const RSExportType *PointeeType)
    460       : RSExportType(Context, ExportClassPointer, Name),
    461         mPointeeType(PointeeType) {
    462   }
    463 
    464   // @PT was normalized by calling RSExportType::NormalizeType() before calling
    465   // this.
    466   static RSExportPointerType *Create(RSContext *Context,
    467                                      const clang::PointerType *PT,
    468                                      const llvm::StringRef &TypeName);
    469 
    470   virtual llvm::Type *convertToLLVMType() const;
    471 
    472  public:
    473   virtual bool keep();
    474 
    475   inline const RSExportType *getPointeeType() const { return mPointeeType; }
    476 
    477   bool matchODR(const RSExportType *E, bool LookInto) const override;
    478 };  // RSExportPointerType
    479 
    480 
    481 class RSExportVectorType : public RSExportPrimitiveType {
    482   friend class RSExportType;
    483   friend class RSExportElement;
    484  private:
    485   unsigned mNumElement;   // number of elements (components)
    486 
    487   RSExportVectorType(RSContext *Context,
    488                      const llvm::StringRef &Name,
    489                      DataType DT,
    490                      bool Normalized,
    491                      unsigned NumElement)
    492       : RSExportPrimitiveType(Context, ExportClassVector, Name,
    493                               DT, Normalized),
    494         mNumElement(NumElement) {
    495   }
    496 
    497   // @EVT was normalized by calling RSExportType::NormalizeType() before
    498   // calling this.
    499   static RSExportVectorType *Create(RSContext *Context,
    500                                     const clang::ExtVectorType *EVT,
    501                                     const llvm::StringRef &TypeName,
    502                                     bool Normalized = false);
    503 
    504   virtual llvm::Type *convertToLLVMType() const;
    505 
    506  public:
    507   static llvm::StringRef GetTypeName(const clang::ExtVectorType *EVT);
    508 
    509   inline unsigned getNumElement() const { return mNumElement; }
    510 
    511   std::string getElementName() const {
    512     std::stringstream Name;
    513     Name << RSExportPrimitiveType::getRSReflectionType(this)->rs_short_type
    514          << "_" << getNumElement();
    515     return Name.str();
    516   }
    517 
    518   bool matchODR(const RSExportType *E, bool LookInto) const override;
    519 };
    520 
    521 // Only *square* *float* matrix is supported by now.
    522 //
    523 // struct rs_matrix{2x2,3x3,4x4, ..., NxN} should be defined as the following
    524 // form *exactly*:
    525 //  typedef struct {
    526 //    float m[{NxN}];
    527 //  } rs_matrixNxN;
    528 //
    529 //  where mDim will be N.
    530 class RSExportMatrixType : public RSExportType {
    531   friend class RSExportType;
    532  private:
    533   unsigned mDim;  // dimension
    534 
    535   RSExportMatrixType(RSContext *Context,
    536                      const llvm::StringRef &Name,
    537                      unsigned Dim)
    538     : RSExportType(Context, ExportClassMatrix, Name),
    539       mDim(Dim) {
    540   }
    541 
    542   virtual llvm::Type *convertToLLVMType() const;
    543 
    544  public:
    545   // @RT was normalized by calling RSExportType::NormalizeType() before
    546   // calling this.
    547   static RSExportMatrixType *Create(RSContext *Context,
    548                                     const clang::RecordType *RT,
    549                                     const llvm::StringRef &TypeName,
    550                                     unsigned Dim);
    551 
    552   inline unsigned getDim() const { return mDim; }
    553 
    554   bool matchODR(const RSExportType *E, bool LookInto) const override;
    555 
    556 };
    557 
    558 class RSExportConstantArrayType : public RSExportType {
    559   friend class RSExportType;
    560  private:
    561   const RSExportType *mElementType;  // Array element type
    562   unsigned mNumElement;              // Array element count
    563 
    564   RSExportConstantArrayType(RSContext *Context,
    565                             const RSExportType *ElementType,
    566                             unsigned NumElement)
    567     : RSExportType(Context, ExportClassConstantArray, "<ConstantArray>"),
    568       mElementType(ElementType),
    569       mNumElement(NumElement) {
    570   }
    571 
    572   // @CAT was normalized by calling RSExportType::NormalizeType() before
    573   // calling this.
    574   static RSExportConstantArrayType *Create(RSContext *Context,
    575                                            const clang::ConstantArrayType *CAT);
    576 
    577   virtual llvm::Type *convertToLLVMType() const;
    578 
    579  public:
    580   unsigned getNumElement() const { return mNumElement; }
    581   const RSExportType *getElementType() const { return mElementType; }
    582 
    583   std::string getElementName() const {
    584     return mElementType->getElementName();
    585   }
    586 
    587   virtual bool keep();
    588   bool matchODR(const RSExportType *E, bool LookInto) const override;
    589 };
    590 
    591 class RSExportRecordType : public RSExportType {
    592   friend class RSExportType;
    593  public:
    594   class Field {
    595    private:
    596     const RSExportType *mType;
    597     // Field name
    598     std::string mName;
    599     // Link to the struct that contain this field
    600     const RSExportRecordType *mParent;
    601     // Offset in the container
    602     size_t mOffset;
    603 
    604    public:
    605     Field(const RSExportType *T,
    606           const llvm::StringRef &Name,
    607           const RSExportRecordType *Parent,
    608           size_t Offset)
    609         : mType(T),
    610           mName(Name.data(), Name.size()),
    611           mParent(Parent),
    612           mOffset(Offset) {
    613     }
    614 
    615     inline const RSExportRecordType *getParent() const { return mParent; }
    616     inline const RSExportType *getType() const { return mType; }
    617     inline const std::string &getName() const { return mName; }
    618     inline size_t getOffsetInParent() const { return mOffset; }
    619   };
    620 
    621   typedef std::list<const Field*>::const_iterator const_field_iterator;
    622 
    623   inline const_field_iterator fields_begin() const {
    624     return this->mFields.begin();
    625   }
    626   inline const_field_iterator fields_end() const {
    627     return this->mFields.end();
    628   }
    629 
    630  private:
    631   std::list<const Field*> mFields;
    632   bool mIsPacked;
    633   // Artificial export struct type is not exported by user (and thus it won't
    634   // get reflected)
    635   bool mIsArtificial;
    636   size_t mStoreSize;
    637   size_t mAllocSize;
    638 
    639   RSExportRecordType(RSContext *Context,
    640                      const llvm::StringRef &Name,
    641                      bool IsPacked,
    642                      bool IsArtificial,
    643                      size_t StoreSize,
    644                      size_t AllocSize)
    645       : RSExportType(Context, ExportClassRecord, Name),
    646         mIsPacked(IsPacked),
    647         mIsArtificial(IsArtificial),
    648         mStoreSize(StoreSize),
    649         mAllocSize(AllocSize) {
    650   }
    651 
    652   // @RT was normalized by calling RSExportType::NormalizeType() before calling
    653   // this.
    654   // @TypeName was retrieved from RSExportType::GetTypeName() before calling
    655   // this.
    656   static RSExportRecordType *Create(RSContext *Context,
    657                                     const clang::RecordType *RT,
    658                                     const llvm::StringRef &TypeName,
    659                                     bool mIsArtificial = false);
    660 
    661   virtual llvm::Type *convertToLLVMType() const;
    662 
    663  public:
    664   inline const std::list<const Field*>& getFields() const { return mFields; }
    665   inline bool isPacked() const { return mIsPacked; }
    666   inline bool isArtificial() const { return mIsArtificial; }
    667   virtual size_t getStoreSize() const { return mStoreSize; }
    668   virtual size_t getAllocSize() const { return mAllocSize; }
    669 
    670   virtual std::string getElementName() const {
    671     return "ScriptField_" + getName();
    672   }
    673 
    674   virtual bool keep();
    675   bool matchODR(const RSExportType *E, bool LookInto) const override;
    676 
    677   ~RSExportRecordType() {
    678     for (std::list<const Field*>::iterator I = mFields.begin(),
    679              E = mFields.end();
    680          I != E;
    681          I++)
    682       if (*I != nullptr)
    683         delete *I;
    684   }
    685 };  // RSExportRecordType
    686 
    687 }   // namespace slang
    688 
    689 #endif  // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_TYPE_H_  NOLINT
    690