1 // Copyright 2021 The Tint Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef SRC_TRANSFORM_CALCULATE_ARRAY_LENGTH_H_ 16 #define SRC_TRANSFORM_CALCULATE_ARRAY_LENGTH_H_ 17 18 #include <string> 19 20 #include "src/ast/internal_decoration.h" 21 #include "src/transform/transform.h" 22 23 namespace tint { 24 25 // Forward declarations 26 class CloneContext; 27 28 namespace transform { 29 30 /// CalculateArrayLength is a transform used to replace calls to arrayLength() 31 /// with a value calculated from the size of the storage buffer. 32 class CalculateArrayLength : public Castable<CalculateArrayLength, Transform> { 33 public: 34 /// BufferSizeIntrinsic is an InternalDecoration that's applied to intrinsic 35 /// functions used to obtain the runtime size of a storage buffer. 36 class BufferSizeIntrinsic 37 : public Castable<BufferSizeIntrinsic, ast::InternalDecoration> { 38 public: 39 /// Constructor 40 /// @param program_id the identifier of the program that owns this node 41 explicit BufferSizeIntrinsic(ProgramID program_id); 42 /// Destructor 43 ~BufferSizeIntrinsic() override; 44 45 /// @return "buffer_size" 46 std::string InternalName() const override; 47 48 /// Performs a deep clone of this object using the CloneContext `ctx`. 49 /// @param ctx the clone context 50 /// @return the newly cloned object 51 const BufferSizeIntrinsic* Clone(CloneContext* ctx) const override; 52 }; 53 54 /// Constructor 55 CalculateArrayLength(); 56 /// Destructor 57 ~CalculateArrayLength() override; 58 59 protected: 60 /// Runs the transform using the CloneContext built for transforming a 61 /// program. Run() is responsible for calling Clone() on the CloneContext. 62 /// @param ctx the CloneContext primed with the input program and 63 /// ProgramBuilder 64 /// @param inputs optional extra transform-specific input data 65 /// @param outputs optional extra transform-specific output data 66 void Run(CloneContext& ctx, const DataMap& inputs, DataMap& outputs) override; 67 }; 68 69 } // namespace transform 70 } // namespace tint 71 72 #endif // SRC_TRANSFORM_CALCULATE_ARRAY_LENGTH_H_ 73