slang_rs_export_type.h revision 048eb8a363270f088ee8e6879bc6620cfe97392d 
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
37inline const clang::Type* GetCanonicalType(const clang::Type* T) {
38  if (T == nullptr) {
39    return  nullptr;
40  }
41  return T->getCanonicalTypeInternal().getTypePtr();
42}
43
44inline const clang::Type* GetCanonicalType(clang::QualType QT) {
45  return GetCanonicalType(QT.getTypePtr());
46}
47
48inline const clang::Type* GetExtVectorElementType(const clang::ExtVectorType *T) {
49  if (T == nullptr) {
50    return nullptr;
51  }
52  return GetCanonicalType(T->getElementType());
53}
54
55inline const clang::Type* GetPointeeType(const clang::PointerType *T) {
56  if (T == nullptr) {
57    return nullptr;
58  }
59  return GetCanonicalType(T->getPointeeType());
60}
61
62inline const clang::Type* GetConstantArrayElementType(const clang::ConstantArrayType *T) {
63  if (T == nullptr) {
64    return nullptr;
65  }
66  return GetCanonicalType(T->getElementType());
67}
68
69
70namespace llvm {
71  class Type;
72}   // namespace llvm
73
74namespace slang {
75
76class RSContext;
77
78// Broad grouping of the data types
79enum DataTypeCategory {
80    PrimitiveDataType,
81    MatrixDataType,
82    ObjectDataType
83};
84
85// Denote whether a particular export is intended for a legacy kernel argument.
86// NotLegacyKernelArgument - not a legacy kernel argument (might not even be a
87//                           kernel argument).
88// LegacyKernelArgument    - legacy pass-by-reference kernel argument using
89//                           pointers and no kernel attribute.
90enum ExportKind {
91   NotLegacyKernelArgument,
92   LegacyKernelArgument
93 };
94
95
96// From graphics/java/android/renderscript/Element.java: Element.DataType
97/* NOTE: The values of the enums are found compiled in the bit code (i.e. as
98 * values, not symbolic.  When adding new types, you must add them to the end.
99 * If removing types, you can't re-use the integer value.
100 *
101 * TODO: but if you do this, you won't be able to keep using First* & Last*
102 * for validation.
103 *
104 * IMPORTANT: This enum should correspond one-for-one to the entries found in the
105 * gReflectionsTypes table (except for the two negative numbers).  Don't edit one without
106 * the other.
107 */
108enum DataType {
109    DataTypeIsStruct = -2,
110    DataTypeUnknown = -1,
111
112    DataTypeFloat16 = 0,
113    DataTypeFloat32 = 1,
114    DataTypeFloat64 = 2,
115    DataTypeSigned8 = 3,
116    DataTypeSigned16 = 4,
117    DataTypeSigned32 = 5,
118    DataTypeSigned64 = 6,
119    DataTypeUnsigned8 = 7,
120    DataTypeUnsigned16 = 8,
121    DataTypeUnsigned32 = 9,
122    DataTypeUnsigned64 = 10,
123    DataTypeBoolean = 11,
124    DataTypeUnsigned565 = 12,
125    DataTypeUnsigned5551 = 13,
126    DataTypeUnsigned4444 = 14,
127
128    DataTypeRSMatrix2x2 = 15,
129    DataTypeRSMatrix3x3 = 16,
130    DataTypeRSMatrix4x4 = 17,
131
132    DataTypeRSElement = 18,
133    DataTypeRSType = 19,
134    DataTypeRSAllocation = 20,
135    DataTypeRSSampler = 21,
136    DataTypeRSScript = 22,
137    DataTypeRSMesh = 23,
138    DataTypeRSPath = 24,
139    DataTypeRSProgramFragment = 25,
140    DataTypeRSProgramVertex = 26,
141    DataTypeRSProgramRaster = 27,
142    DataTypeRSProgramStore = 28,
143    DataTypeRSFont = 29,
144
145    // This should always be last and correspond to the size of the gReflectionTypes table.
146    DataTypeMax
147};
148
149typedef struct {
150    // The data type category
151    DataTypeCategory category;
152    // The element name in RenderScript
153    const char * rs_type;
154    // The short element name in RenderScript
155    const char * rs_short_type;
156    // The size of the type in bits
157    uint32_t size_in_bits;
158    // The reflected name in C code
159    const char * c_name;
160    // The reflected name in Java code
161    const char * java_name;
162    // The array type that is compatible with Allocations of our type,
163    // for use with copyTo(), copyFrom()
164    const char * java_array_element_name;
165    // The prefix for C vector types
166    const char * rs_c_vector_prefix;
167    // The prefix for Java vector types
168    const char * rs_java_vector_prefix;
169    // Indicates an unsigned type undergoing Java promotion
170    bool java_promotion;
171} RSReflectionType;
172
173
174typedef struct RSReflectionTypeData_rec {
175    const RSReflectionType *type;
176    uint32_t vecSize;   // number of elements; one if not a vector
177    bool isPointer;
178    uint32_t arraySize; // number of elements; zero if not an array
179
180    // Subelements
181    //std::vector<const struct RSReflectionTypeData_rec *> fields;
182    //std::vector< std::string > fieldNames;
183    //std::vector< uint32_t> fieldOffsetBytes;
184} RSReflectionTypeData;
185
186// Make a name for types that are too complicated to create the real names.
187std::string CreateDummyName(const char *type, const std::string &name);
188
189inline bool IsDummyName(const llvm::StringRef &Name) {
190  return Name.startswith("<");
191}
192
193class RSExportType : public RSExportable {
194  friend class RSExportElement;
195 public:
196  typedef enum {
197    ExportClassPrimitive,
198    ExportClassPointer,
199    ExportClassVector,
200    ExportClassMatrix,
201    ExportClassConstantArray,
202    ExportClassRecord
203  } ExportClass;
204
205  void convertToRTD(RSReflectionTypeData *rtd) const;
206
207 private:
208  ExportClass mClass;
209  std::string mName;
210
211  // Cache the result after calling convertToLLVMType() at the first time
212  mutable llvm::Type *mLLVMType;
213
214 protected:
215  RSExportType(RSContext *Context,
216               ExportClass Class,
217               const llvm::StringRef &Name);
218
219  // Let's make it private since there're some prerequisites to call this
220  // function.
221  //
222  // @T was normalized by calling RSExportType::NormalizeType().
223  // @TypeName was retrieved from RSExportType::GetTypeName() before calling
224  //           this.
225  // @EK denotes whether this @T is being used for a legacy kernel argument or
226  //     something else.
227  //
228  static RSExportType *Create(RSContext *Context,
229                              const clang::Type *T,
230                              const llvm::StringRef &TypeName,
231                              ExportKind EK);
232
233  static llvm::StringRef GetTypeName(const clang::Type *T);
234
235  // This function convert the RSExportType to LLVM type. Actually, it should be
236  // "convert Clang type to LLVM type." However, clang doesn't make this API
237  // (lib/CodeGen/CodeGenTypes.h) public, we need to do by ourselves.
238  //
239  // Once we can get LLVM type, we can use LLVM to get alignment information,
240  // allocation size of a given type and structure layout that LLVM used
241  // (all of these information are target dependent) without dealing with these
242  // by ourselves.
243  virtual llvm::Type *convertToLLVMType() const = 0;
244  // Record type may recursively reference its type definition. We need a
245  // temporary type setup before the type construction gets done.
246  inline void setAbstractLLVMType(llvm::Type *LLVMType) const {
247    mLLVMType = LLVMType;
248  }
249
250  virtual ~RSExportType();
251
252 public:
253  // This function additionally verifies that the Type T is exportable.
254  // If it is not, this function returns false. Otherwise it returns true.
255  static bool NormalizeType(const clang::Type *&T,
256                            llvm::StringRef &TypeName,
257                            RSContext *Context,
258                            const clang::VarDecl *VD,
259                            ExportKind EK);
260
261  // This function checks whether the specified type can be handled by RS/FS.
262  // If it cannot, this function returns false. Otherwise it returns true.
263  // Filterscript has additional restrictions on supported types.
264  static bool ValidateType(slang::RSContext *Context, clang::ASTContext &C,
265                           clang::QualType QT, clang::NamedDecl *ND,
266                           clang::SourceLocation Loc, unsigned int TargetAPI,
267                           bool IsFilterscript, bool IsExtern);
268
269  // This function ensures that the VarDecl can be properly handled by RS.
270  // If it cannot, this function returns false. Otherwise it returns true.
271  // Filterscript has additional restrictions on supported types.
272  static bool ValidateVarDecl(slang::RSContext *Context, clang::VarDecl *VD,
273                              unsigned int TargetAPI, bool IsFilterscript);
274
275  // @T may not be normalized
276  static RSExportType *Create(RSContext *Context, const clang::Type *T,
277                              ExportKind EK);
278  static RSExportType *CreateFromDecl(RSContext *Context,
279                                      const clang::VarDecl *VD);
280
281  static const clang::Type *GetTypeOfDecl(const clang::DeclaratorDecl *DD);
282
283  inline ExportClass getClass() const { return mClass; }
284
285  inline llvm::Type *getLLVMType() const {
286    if (mLLVMType == nullptr)
287      mLLVMType = convertToLLVMType();
288    return mLLVMType;
289  }
290
291  // Return the maximum number of bytes that may be written when this type is stored.
292  virtual size_t getStoreSize() const;
293
294  // Return the distance in bytes between successive elements of this type; it includes padding.
295  virtual size_t getAllocSize() const;
296
297  inline const std::string &getName() const { return mName; }
298
299  virtual std::string getElementName() const {
300    // Base case is actually an invalid C/Java identifier.
301    return "@@INVALID@@";
302  }
303
304  virtual bool keep();
305  virtual bool equals(const RSExportable *E) const;
306};  // RSExportType
307
308// Primitive types
309class RSExportPrimitiveType : public RSExportType {
310  friend class RSExportType;
311  friend class RSExportElement;
312 private:
313  DataType mType;
314  bool mNormalized;
315
316  typedef llvm::StringMap<DataType> RSSpecificTypeMapTy;
317  static llvm::ManagedStatic<RSSpecificTypeMapTy> RSSpecificTypeMap;
318
319  static const size_t SizeOfDataTypeInBits[];
320  // @T was normalized by calling RSExportType::NormalizeType() before calling
321  // this.
322  // @TypeName was retrieved from RSExportType::GetTypeName() before calling
323  // this
324  static RSExportPrimitiveType *Create(RSContext *Context,
325                                       const clang::Type *T,
326                                       const llvm::StringRef &TypeName,
327                                       bool Normalized = false);
328
329 protected:
330  RSExportPrimitiveType(RSContext *Context,
331                        // for derived class to set their type class
332                        ExportClass Class,
333                        const llvm::StringRef &Name,
334                        DataType DT,
335                        bool Normalized)
336      : RSExportType(Context, Class, Name),
337        mType(DT),
338        mNormalized(Normalized) {
339  }
340
341  virtual llvm::Type *convertToLLVMType() const;
342
343  static DataType GetDataType(RSContext *Context, const clang::Type *T);
344
345 public:
346  // T is normalized by calling RSExportType::NormalizeType() before
347  // calling this
348  static bool IsPrimitiveType(const clang::Type *T);
349
350  // @T may not be normalized
351  static RSExportPrimitiveType *Create(RSContext *Context,
352                                       const clang::Type *T);
353
354  static DataType GetRSSpecificType(const llvm::StringRef &TypeName);
355  static DataType GetRSSpecificType(const clang::Type *T);
356
357  static bool IsRSMatrixType(DataType DT);
358  static bool IsRSObjectType(DataType DT);
359  static bool IsRSObjectType(const clang::Type *T) {
360    return IsRSObjectType(GetRSSpecificType(T));
361  }
362
363  // Determines whether T is [an array of] struct that contains at least one
364  // RS object type within it.
365  static bool IsStructureTypeWithRSObject(const clang::Type *T);
366
367  // For a primitive type, this is the size of the type.
368  // For a vector type (RSExportVectorType is derived from RSExportPrimitiveType),
369  // this is the size of a single vector element (component).
370  static size_t GetElementSizeInBits(const RSExportPrimitiveType *EPT);
371
372  inline DataType getType() const { return mType; }
373  inline bool isRSObjectType() const {
374      return IsRSObjectType(mType);
375  }
376
377  virtual bool equals(const RSExportable *E) const;
378
379  static RSReflectionType *getRSReflectionType(DataType DT);
380  static RSReflectionType *getRSReflectionType(
381      const RSExportPrimitiveType *EPT) {
382    return getRSReflectionType(EPT->getType());
383  }
384
385  // For a vector type, this is the size of a single element.
386  unsigned getElementSizeInBytes() const { return (GetElementSizeInBits(this) >> 3); }
387
388  std::string getElementName() const {
389    return getRSReflectionType(this)->rs_short_type;
390  }
391};  // RSExportPrimitiveType
392
393
394class RSExportPointerType : public RSExportType {
395  friend class RSExportType;
396  friend class RSExportFunc;
397 private:
398  const RSExportType *mPointeeType;
399
400  RSExportPointerType(RSContext *Context,
401                      const llvm::StringRef &Name,
402                      const RSExportType *PointeeType)
403      : RSExportType(Context, ExportClassPointer, Name),
404        mPointeeType(PointeeType) {
405  }
406
407  // @PT was normalized by calling RSExportType::NormalizeType() before calling
408  // this.
409  static RSExportPointerType *Create(RSContext *Context,
410                                     const clang::PointerType *PT,
411                                     const llvm::StringRef &TypeName);
412
413  virtual llvm::Type *convertToLLVMType() const;
414
415 public:
416  virtual bool keep();
417
418  inline const RSExportType *getPointeeType() const { return mPointeeType; }
419
420  virtual bool equals(const RSExportable *E) const;
421};  // RSExportPointerType
422
423
424class RSExportVectorType : public RSExportPrimitiveType {
425  friend class RSExportType;
426  friend class RSExportElement;
427 private:
428  unsigned mNumElement;   // number of elements (components)
429
430  RSExportVectorType(RSContext *Context,
431                     const llvm::StringRef &Name,
432                     DataType DT,
433                     bool Normalized,
434                     unsigned NumElement)
435      : RSExportPrimitiveType(Context, ExportClassVector, Name,
436                              DT, Normalized),
437        mNumElement(NumElement) {
438  }
439
440  // @EVT was normalized by calling RSExportType::NormalizeType() before
441  // calling this.
442  static RSExportVectorType *Create(RSContext *Context,
443                                    const clang::ExtVectorType *EVT,
444                                    const llvm::StringRef &TypeName,
445                                    bool Normalized = false);
446
447  virtual llvm::Type *convertToLLVMType() const;
448
449 public:
450  static llvm::StringRef GetTypeName(const clang::ExtVectorType *EVT);
451
452  inline unsigned getNumElement() const { return mNumElement; }
453
454  std::string getElementName() const {
455    std::stringstream Name;
456    Name << RSExportPrimitiveType::getRSReflectionType(this)->rs_short_type
457         << "_" << getNumElement();
458    return Name.str();
459  }
460
461  virtual bool equals(const RSExportable *E) const;
462};
463
464// Only *square* *float* matrix is supported by now.
465//
466// struct rs_matrix{2x2,3x3,4x4, ..., NxN} should be defined as the following
467// form *exactly*:
468//  typedef struct {
469//    float m[{NxN}];
470//  } rs_matrixNxN;
471//
472//  where mDim will be N.
473class RSExportMatrixType : public RSExportType {
474  friend class RSExportType;
475 private:
476  unsigned mDim;  // dimension
477
478  RSExportMatrixType(RSContext *Context,
479                     const llvm::StringRef &Name,
480                     unsigned Dim)
481    : RSExportType(Context, ExportClassMatrix, Name),
482      mDim(Dim) {
483  }
484
485  virtual llvm::Type *convertToLLVMType() const;
486
487 public:
488  // @RT was normalized by calling RSExportType::NormalizeType() before
489  // calling this.
490  static RSExportMatrixType *Create(RSContext *Context,
491                                    const clang::RecordType *RT,
492                                    const llvm::StringRef &TypeName,
493                                    unsigned Dim);
494
495  inline unsigned getDim() const { return mDim; }
496
497  virtual bool equals(const RSExportable *E) const;
498};
499
500class RSExportConstantArrayType : public RSExportType {
501  friend class RSExportType;
502 private:
503  const RSExportType *mElementType;  // Array element type
504  unsigned mNumElement;              // Array element count
505
506  RSExportConstantArrayType(RSContext *Context,
507                            const RSExportType *ElementType,
508                            unsigned NumElement)
509    : RSExportType(Context, ExportClassConstantArray, "<ConstantArray>"),
510      mElementType(ElementType),
511      mNumElement(NumElement) {
512  }
513
514  // @CAT was normalized by calling RSExportType::NormalizeType() before
515  // calling this.
516  static RSExportConstantArrayType *Create(RSContext *Context,
517                                           const clang::ConstantArrayType *CAT);
518
519  virtual llvm::Type *convertToLLVMType() const;
520
521 public:
522  unsigned getNumElement() const { return mNumElement; }
523  const RSExportType *getElementType() const { return mElementType; }
524
525  std::string getElementName() const {
526    return mElementType->getElementName();
527  }
528
529  virtual bool keep();
530  virtual bool equals(const RSExportable *E) const;
531};
532
533class RSExportRecordType : public RSExportType {
534  friend class RSExportType;
535 public:
536  class Field {
537   private:
538    const RSExportType *mType;
539    // Field name
540    std::string mName;
541    // Link to the struct that contain this field
542    const RSExportRecordType *mParent;
543    // Offset in the container
544    size_t mOffset;
545
546   public:
547    Field(const RSExportType *T,
548          const llvm::StringRef &Name,
549          const RSExportRecordType *Parent,
550          size_t Offset)
551        : mType(T),
552          mName(Name.data(), Name.size()),
553          mParent(Parent),
554          mOffset(Offset) {
555    }
556
557    inline const RSExportRecordType *getParent() const { return mParent; }
558    inline const RSExportType *getType() const { return mType; }
559    inline const std::string &getName() const { return mName; }
560    inline size_t getOffsetInParent() const { return mOffset; }
561  };
562
563  typedef std::list<const Field*>::const_iterator const_field_iterator;
564
565  inline const_field_iterator fields_begin() const {
566    return this->mFields.begin();
567  }
568  inline const_field_iterator fields_end() const {
569    return this->mFields.end();
570  }
571
572 private:
573  std::list<const Field*> mFields;
574  bool mIsPacked;
575  // Artificial export struct type is not exported by user (and thus it won't
576  // get reflected)
577  bool mIsArtificial;
578  size_t mStoreSize;
579  size_t mAllocSize;
580
581  RSExportRecordType(RSContext *Context,
582                     const llvm::StringRef &Name,
583                     bool IsPacked,
584                     bool IsArtificial,
585                     size_t StoreSize,
586                     size_t AllocSize)
587      : RSExportType(Context, ExportClassRecord, Name),
588        mIsPacked(IsPacked),
589        mIsArtificial(IsArtificial),
590        mStoreSize(StoreSize),
591        mAllocSize(AllocSize) {
592  }
593
594  // @RT was normalized by calling RSExportType::NormalizeType() before calling
595  // this.
596  // @TypeName was retrieved from RSExportType::GetTypeName() before calling
597  // this.
598  static RSExportRecordType *Create(RSContext *Context,
599                                    const clang::RecordType *RT,
600                                    const llvm::StringRef &TypeName,
601                                    bool mIsArtificial = false);
602
603  virtual llvm::Type *convertToLLVMType() const;
604
605 public:
606  inline const std::list<const Field*>& getFields() const { return mFields; }
607  inline bool isPacked() const { return mIsPacked; }
608  inline bool isArtificial() const { return mIsArtificial; }
609  virtual size_t getStoreSize() const { return mStoreSize; }
610  virtual size_t getAllocSize() const { return mAllocSize; }
611
612  virtual std::string getElementName() const {
613    return "ScriptField_" + getName();
614  }
615
616  virtual bool keep();
617  virtual bool equals(const RSExportable *E) const;
618
619  ~RSExportRecordType() {
620    for (std::list<const Field*>::iterator I = mFields.begin(),
621             E = mFields.end();
622         I != E;
623         I++)
624      if (*I != nullptr)
625        delete *I;
626  }
627};  // RSExportRecordType
628
629}   // namespace slang
630
631#endif  // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_TYPE_H_  NOLINT
632