src/transform/vertex_pulling_transform_test.cc - tint - Git at Google

 // Copyright 2020 The Tint Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "src/transform/vertex_pulling_transform.h"

 #include "gtest/gtest.h"
 #include "src/ast/decorated_variable.h"
 #include "src/ast/function.h"
 #include "src/ast/pipeline_stage.h"
 #include "src/ast/stage_decoration.h"
 #include "src/ast/type/array_type.h"
 #include "src/ast/type/f32_type.h"
 #include "src/ast/type/i32_type.h"
 #include "src/ast/type/void_type.h"
 #include "src/type_determiner.h"
 #include "src/validator.h"

 namespace tint {
 namespace transform {
 namespace {

 class VertexPullingTransformHelper {
  public:
   VertexPullingTransformHelper() {
     mod_ = std::make_unique<ast::Module>();
     transform_ = std::make_unique<VertexPullingTransform>(&ctx_, mod_.get());
   }

   // Create basic module with an entry point and vertex function
   void InitBasicModule() {
     auto func = std::make_unique<ast::Function>(
         "main", ast::VariableList{},
         ctx_.type_mgr().Get(std::make_unique<ast::type::VoidType>()));
     func->add_decoration(
         std::make_unique<ast::StageDecoration>(ast::PipelineStage ::kVertex));
     mod()->AddFunction(std::move(func));
   }

   // Set up the transformation, after building the module
   void InitTransform(VertexStateDescriptor vertex_state) {
     EXPECT_TRUE(mod_->IsValid());

     TypeDeterminer td(&ctx_, mod_.get());
     EXPECT_TRUE(td.Determine());

     transform_->SetVertexState(
         std::make_unique<VertexStateDescriptor>(std::move(vertex_state)));
     transform_->SetEntryPoint("main");
   }

   // Inserts a variable which will be converted to vertex pulling
   void AddVertexInputVariable(uint32_t location,
                               std::string name,
                               ast::type::Type* type) {
     auto var = std::make_unique<ast::DecoratedVariable>(
         std::make_unique<ast::Variable>(name, ast::StorageClass::kInput, type));

     ast::VariableDecorationList decorations;
     decorations.push_back(std::make_unique<ast::LocationDecoration>(location));

     var->set_decorations(std::move(decorations));
     mod_->AddGlobalVariable(std::move(var));
   }

   Context* ctx() { return &ctx_; }
   ast::Module* mod() { return mod_.get(); }
   VertexPullingTransform* transform() { return transform_.get(); }

  private:
   Context ctx_;
   std::unique_ptr<ast::Module> mod_;
   std::unique_ptr<VertexPullingTransform> transform_;
 };

 class VertexPullingTransformTest : public VertexPullingTransformHelper,
                                    public testing::Test {};

 TEST_F(VertexPullingTransformTest, Error_NoVertexState) {
   EXPECT_FALSE(transform()->Run());
   EXPECT_EQ(transform()->error(), "SetVertexState not called");
 }

 TEST_F(VertexPullingTransformTest, Error_NoEntryPoint) {
   transform()->SetVertexState(std::make_unique<VertexStateDescriptor>());
   EXPECT_FALSE(transform()->Run());
   EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
 }

 TEST_F(VertexPullingTransformTest, Error_InvalidEntryPoint) {
   InitBasicModule();
   InitTransform({});
   transform()->SetEntryPoint("_");

   EXPECT_FALSE(transform()->Run());
   EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
 }

 TEST_F(VertexPullingTransformTest, Error_EntryPointWrongStage) {
   auto func = std::make_unique<ast::Function>(
       "main", ast::VariableList{},
       ctx()->type_mgr().Get(std::make_unique<ast::type::VoidType>()));
   func->add_decoration(
       std::make_unique<ast::StageDecoration>(ast::PipelineStage::kFragment));
   mod()->AddFunction(std::move(func));

   InitTransform({});
   EXPECT_FALSE(transform()->Run());
   EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
 }

 TEST_F(VertexPullingTransformTest, BasicModule) {
   InitBasicModule();
   InitTransform({});
   EXPECT_TRUE(transform()->Run());
 }

 TEST_F(VertexPullingTransformTest, OneAttribute) {
   InitBasicModule();

   ast::type::F32Type f32;
   AddVertexInputVariable(0, "var_a", &f32);

   InitTransform({{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}}}});

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __f32
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{vertex_idx}
     }
     _tint_pulling_vertex_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{4}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_0}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 TEST_F(VertexPullingTransformTest, OneInstancedAttribute) {
   InitBasicModule();

   ast::type::F32Type f32;
   AddVertexInputVariable(0, "var_a", &f32);

   InitTransform(
       {{{4, InputStepMode::kInstance, {{VertexFormat::kF32, 0, 0}}}}});

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __f32
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{instance_idx}
     }
     _tint_pulling_instance_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_instance_index}
             multiply
             ScalarConstructor{4}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_0}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 TEST_F(VertexPullingTransformTest, OneAttributeDifferentOutputSet) {
   InitBasicModule();

   ast::type::F32Type f32;
   AddVertexInputVariable(0, "var_a", &f32);

   InitTransform({{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}}}});
   transform()->SetPullingBufferBindingSet(5);

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __f32
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{vertex_idx}
     }
     _tint_pulling_vertex_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{5}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{4}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_0}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 // We expect the transform to use an existing builtin variables if it finds them
 TEST_F(VertexPullingTransformTest, ExistingVertexIndexAndInstanceIndex) {
   InitBasicModule();

   ast::type::F32Type f32;
   AddVertexInputVariable(0, "var_a", &f32);
   AddVertexInputVariable(1, "var_b", &f32);

   ast::type::I32Type i32;
   {
     auto vertex_index_var = std::make_unique<ast::DecoratedVariable>(
         std::make_unique<ast::Variable>("custom_vertex_index",
                                         ast::StorageClass::kInput, &i32));

     ast::VariableDecorationList decorations;
     decorations.push_back(
         std::make_unique<ast::BuiltinDecoration>(ast::Builtin::kVertexIdx));

     vertex_index_var->set_decorations(std::move(decorations));
     mod()->AddGlobalVariable(std::move(vertex_index_var));
   }

   {
     auto instance_index_var = std::make_unique<ast::DecoratedVariable>(
         std::make_unique<ast::Variable>("custom_instance_index",
                                         ast::StorageClass::kInput, &i32));

     ast::VariableDecorationList decorations;
     decorations.push_back(
         std::make_unique<ast::BuiltinDecoration>(ast::Builtin::kInstanceIdx));

     instance_index_var->set_decorations(std::move(decorations));
     mod()->AddGlobalVariable(std::move(instance_index_var));
   }

   InitTransform(
       {{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}},
         {4, InputStepMode::kInstance, {{VertexFormat::kF32, 0, 1}}}}});

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __f32
   }
   Variable{
     var_b
     private
     __f32
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{vertex_idx}
     }
     custom_vertex_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{instance_idx}
     }
     custom_instance_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{1}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_1
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{custom_vertex_index}
             multiply
             ScalarConstructor{4}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_0}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{custom_instance_index}
             multiply
             ScalarConstructor{4}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_b}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_1}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 TEST_F(VertexPullingTransformTest, TwoAttributesSameBuffer) {
   InitBasicModule();

   ast::type::F32Type f32;
   AddVertexInputVariable(0, "var_a", &f32);

   ast::type::ArrayType vec4_f32{&f32, 4u};
   AddVertexInputVariable(1, "var_b", &vec4_f32);

   InitTransform(
       {{{16,
          InputStepMode::kVertex,
          {{VertexFormat::kF32, 0, 0}, {VertexFormat::kVec4F32, 0, 1}}}}});

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __f32
   }
   Variable{
     var_b
     private
     __array__f32_4
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{vertex_idx}
     }
     _tint_pulling_vertex_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{16}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         Bitcast<__f32>{
           ArrayAccessor{
             MemberAccessor{
               Identifier{_tint_pulling_vertex_buffer_0}
               Identifier{_tint_vertex_data}
             }
             Binary{
               Identifier{_tint_pulling_pos}
               divide
               ScalarConstructor{4}
             }
           }
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{16}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_b}
         TypeConstructor{
           __vec_4__f32
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{0}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{4}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{8}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{12}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 TEST_F(VertexPullingTransformTest, FloatVectorAttributes) {
   InitBasicModule();

   ast::type::F32Type f32;
   ast::type::ArrayType vec2_f32{&f32, 2u};
   AddVertexInputVariable(0, "var_a", &vec2_f32);

   ast::type::ArrayType vec3_f32{&f32, 3u};
   AddVertexInputVariable(1, "var_b", &vec3_f32);

   ast::type::ArrayType vec4_f32{&f32, 4u};
   AddVertexInputVariable(2, "var_c", &vec4_f32);

   InitTransform(
       {{{8, InputStepMode::kVertex, {{VertexFormat::kVec2F32, 0, 0}}},
         {12, InputStepMode::kVertex, {{VertexFormat::kVec3F32, 0, 1}}},
         {16, InputStepMode::kVertex, {{VertexFormat::kVec4F32, 0, 2}}}}});

   EXPECT_TRUE(transform()->Run());

   EXPECT_EQ(R"(Module{
   TintVertexData -> __struct_TintVertexData
   Struct{
     [[block]]
     StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
   }
   Variable{
     var_a
     private
     __array__f32_2
   }
   Variable{
     var_b
     private
     __array__f32_3
   }
   Variable{
     var_c
     private
     __array__f32_4
   }
   DecoratedVariable{
     Decorations{
       BuiltinDecoration{vertex_idx}
     }
     _tint_pulling_vertex_index
     in
     __i32
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{0}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_0
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{1}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_1
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   DecoratedVariable{
     Decorations{
       BindingDecoration{2}
       SetDecoration{4}
     }
     _tint_pulling_vertex_buffer_2
     storage_buffer
     __alias_TintVertexData__struct_TintVertexData
   }
   Function main -> __void
   StageDecoration{vertex}
   ()
   {
     Block{
       VariableDeclStatement{
         Variable{
           _tint_pulling_pos
           function
           __i32
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{8}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_a}
         TypeConstructor{
           __vec_2__f32
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{0}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_0}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{4}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{12}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_b}
         TypeConstructor{
           __vec_3__f32
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_1}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{0}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_1}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{4}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_1}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{8}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
         }
       }
       Assignment{
         Identifier{_tint_pulling_pos}
         Binary{
           Binary{
             Identifier{_tint_pulling_vertex_index}
             multiply
             ScalarConstructor{16}
           }
           add
           ScalarConstructor{0}
         }
       }
       Assignment{
         Identifier{var_c}
         TypeConstructor{
           __vec_4__f32
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_2}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{0}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_2}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{4}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_2}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{8}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
           Bitcast<__f32>{
             ArrayAccessor{
               MemberAccessor{
                 Identifier{_tint_pulling_vertex_buffer_2}
                 Identifier{_tint_vertex_data}
               }
               Binary{
                 Binary{
                   Identifier{_tint_pulling_pos}
                   add
                   ScalarConstructor{12}
                 }
                 divide
                 ScalarConstructor{4}
               }
             }
           }
         }
       }
     }
   }
 }
 )",
             mod()->to_str());
 }

 }  // namespace
 }  // namespace transform
 }  // namespace tint
	// Copyright 2020 The Tint Authors.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "src/transform/vertex_pulling_transform.h"

	#include "gtest/gtest.h"
	#include "src/ast/decorated_variable.h"
	#include "src/ast/function.h"
	#include "src/ast/pipeline_stage.h"
	#include "src/ast/stage_decoration.h"
	#include "src/ast/type/array_type.h"
	#include "src/ast/type/f32_type.h"
	#include "src/ast/type/i32_type.h"
	#include "src/ast/type/void_type.h"
	#include "src/type_determiner.h"
	#include "src/validator.h"

	namespace tint {
	namespace transform {
	namespace {

	class VertexPullingTransformHelper {
	public:
	VertexPullingTransformHelper() {
	mod_ = std::make_unique<ast::Module>();
	transform_ = std::make_unique<VertexPullingTransform>(&ctx_, mod_.get());
	}

	// Create basic module with an entry point and vertex function
	void InitBasicModule() {
	auto func = std::make_unique<ast::Function>(
	"main", ast::VariableList{},
	ctx_.type_mgr().Get(std::make_unique<ast::type::VoidType>()));
	func->add_decoration(
	std::make_unique<ast::StageDecoration>(ast::PipelineStage ::kVertex));
	mod()->AddFunction(std::move(func));
	}

	// Set up the transformation, after building the module
	void InitTransform(VertexStateDescriptor vertex_state) {
	EXPECT_TRUE(mod_->IsValid());

	TypeDeterminer td(&ctx_, mod_.get());
	EXPECT_TRUE(td.Determine());

	transform_->SetVertexState(
	std::make_unique<VertexStateDescriptor>(std::move(vertex_state)));
	transform_->SetEntryPoint("main");
	}

	// Inserts a variable which will be converted to vertex pulling
	void AddVertexInputVariable(uint32_t location,
	std::string name,
	ast::type::Type* type) {
	auto var = std::make_unique<ast::DecoratedVariable>(
	std::make_unique<ast::Variable>(name, ast::StorageClass::kInput, type));

	ast::VariableDecorationList decorations;
	decorations.push_back(std::make_unique<ast::LocationDecoration>(location));

	var->set_decorations(std::move(decorations));
	mod_->AddGlobalVariable(std::move(var));
	}

	Context* ctx() { return &ctx_; }
	ast::Module* mod() { return mod_.get(); }
	VertexPullingTransform* transform() { return transform_.get(); }

	private:
	Context ctx_;
	std::unique_ptr<ast::Module> mod_;
	std::unique_ptr<VertexPullingTransform> transform_;
	};

	class VertexPullingTransformTest : public VertexPullingTransformHelper,
	public testing::Test {};

	TEST_F(VertexPullingTransformTest, Error_NoVertexState) {
	EXPECT_FALSE(transform()->Run());
	EXPECT_EQ(transform()->error(), "SetVertexState not called");
	}

	TEST_F(VertexPullingTransformTest, Error_NoEntryPoint) {
	transform()->SetVertexState(std::make_unique<VertexStateDescriptor>());
	EXPECT_FALSE(transform()->Run());
	EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
	}

	TEST_F(VertexPullingTransformTest, Error_InvalidEntryPoint) {
	InitBasicModule();
	InitTransform({});
	transform()->SetEntryPoint("_");

	EXPECT_FALSE(transform()->Run());
	EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
	}

	TEST_F(VertexPullingTransformTest, Error_EntryPointWrongStage) {
	auto func = std::make_unique<ast::Function>(
	"main", ast::VariableList{},
	ctx()->type_mgr().Get(std::make_unique<ast::type::VoidType>()));
	func->add_decoration(
	std::make_unique<ast::StageDecoration>(ast::PipelineStage::kFragment));
	mod()->AddFunction(std::move(func));

	InitTransform({});
	EXPECT_FALSE(transform()->Run());
	EXPECT_EQ(transform()->error(), "Vertex stage entry point not found");
	}

	TEST_F(VertexPullingTransformTest, BasicModule) {
	InitBasicModule();
	InitTransform({});
	EXPECT_TRUE(transform()->Run());
	}

	TEST_F(VertexPullingTransformTest, OneAttribute) {
	InitBasicModule();

	ast::type::F32Type f32;
	AddVertexInputVariable(0, "var_a", &f32);

	InitTransform({{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}}}});

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__f32
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{vertex_idx}
	}
	_tint_pulling_vertex_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{4}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	TEST_F(VertexPullingTransformTest, OneInstancedAttribute) {
	InitBasicModule();

	ast::type::F32Type f32;
	AddVertexInputVariable(0, "var_a", &f32);

	InitTransform(
	{{{4, InputStepMode::kInstance, {{VertexFormat::kF32, 0, 0}}}}});

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__f32
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{instance_idx}
	}
	_tint_pulling_instance_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_instance_index}
	multiply
	ScalarConstructor{4}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	TEST_F(VertexPullingTransformTest, OneAttributeDifferentOutputSet) {
	InitBasicModule();

	ast::type::F32Type f32;
	AddVertexInputVariable(0, "var_a", &f32);

	InitTransform({{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}}}});
	transform()->SetPullingBufferBindingSet(5);

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__f32
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{vertex_idx}
	}
	_tint_pulling_vertex_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{5}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{4}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	// We expect the transform to use an existing builtin variables if it finds them
	TEST_F(VertexPullingTransformTest, ExistingVertexIndexAndInstanceIndex) {
	InitBasicModule();

	ast::type::F32Type f32;
	AddVertexInputVariable(0, "var_a", &f32);
	AddVertexInputVariable(1, "var_b", &f32);

	ast::type::I32Type i32;
	{
	auto vertex_index_var = std::make_unique<ast::DecoratedVariable>(
	std::make_unique<ast::Variable>("custom_vertex_index",
	ast::StorageClass::kInput, &i32));

	ast::VariableDecorationList decorations;
	decorations.push_back(
	std::make_unique<ast::BuiltinDecoration>(ast::Builtin::kVertexIdx));

	vertex_index_var->set_decorations(std::move(decorations));
	mod()->AddGlobalVariable(std::move(vertex_index_var));
	}

	{
	auto instance_index_var = std::make_unique<ast::DecoratedVariable>(
	std::make_unique<ast::Variable>("custom_instance_index",
	ast::StorageClass::kInput, &i32));

	ast::VariableDecorationList decorations;
	decorations.push_back(
	std::make_unique<ast::BuiltinDecoration>(ast::Builtin::kInstanceIdx));

	instance_index_var->set_decorations(std::move(decorations));
	mod()->AddGlobalVariable(std::move(instance_index_var));
	}

	InitTransform(
	{{{4, InputStepMode::kVertex, {{VertexFormat::kF32, 0, 0}}},
	{4, InputStepMode::kInstance, {{VertexFormat::kF32, 0, 1}}}}});

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__f32
	}
	Variable{
	var_b
	private
	__f32
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{vertex_idx}
	}
	custom_vertex_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{instance_idx}
	}
	custom_instance_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{1}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_1
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{custom_vertex_index}
	multiply
	ScalarConstructor{4}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{custom_instance_index}
	multiply
	ScalarConstructor{4}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_b}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_1}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	TEST_F(VertexPullingTransformTest, TwoAttributesSameBuffer) {
	InitBasicModule();

	ast::type::F32Type f32;
	AddVertexInputVariable(0, "var_a", &f32);

	ast::type::ArrayType vec4_f32{&f32, 4u};
	AddVertexInputVariable(1, "var_b", &vec4_f32);

	InitTransform(
	{{{16,
	InputStepMode::kVertex,
	{{VertexFormat::kF32, 0, 0}, {VertexFormat::kVec4F32, 0, 1}}}}});

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__f32
	}
	Variable{
	var_b
	private
	__array__f32_4
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{vertex_idx}
	}
	_tint_pulling_vertex_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{16}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Identifier{_tint_pulling_pos}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{16}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_b}
	TypeConstructor{
	__vec_4__f32
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{0}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{4}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{8}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{12}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	TEST_F(VertexPullingTransformTest, FloatVectorAttributes) {
	InitBasicModule();

	ast::type::F32Type f32;
	ast::type::ArrayType vec2_f32{&f32, 2u};
	AddVertexInputVariable(0, "var_a", &vec2_f32);

	ast::type::ArrayType vec3_f32{&f32, 3u};
	AddVertexInputVariable(1, "var_b", &vec3_f32);

	ast::type::ArrayType vec4_f32{&f32, 4u};
	AddVertexInputVariable(2, "var_c", &vec4_f32);

	InitTransform(
	{{{8, InputStepMode::kVertex, {{VertexFormat::kVec2F32, 0, 0}}},
	{12, InputStepMode::kVertex, {{VertexFormat::kVec3F32, 0, 1}}},
	{16, InputStepMode::kVertex, {{VertexFormat::kVec4F32, 0, 2}}}}});

	EXPECT_TRUE(transform()->Run());

	EXPECT_EQ(R"(Module{
	TintVertexData -> __struct_TintVertexData
	Struct{
	[[block]]
	StructMember{[[ offset 0 ]] _tint_vertex_data: __array__u32_stride_4}
	}
	Variable{
	var_a
	private
	__array__f32_2
	}
	Variable{
	var_b
	private
	__array__f32_3
	}
	Variable{
	var_c
	private
	__array__f32_4
	}
	DecoratedVariable{
	Decorations{
	BuiltinDecoration{vertex_idx}
	}
	_tint_pulling_vertex_index
	in
	__i32
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{0}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_0
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{1}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_1
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	DecoratedVariable{
	Decorations{
	BindingDecoration{2}
	SetDecoration{4}
	}
	_tint_pulling_vertex_buffer_2
	storage_buffer
	__alias_TintVertexData__struct_TintVertexData
	}
	Function main -> __void
	StageDecoration{vertex}
	()
	{
	Block{
	VariableDeclStatement{
	Variable{
	_tint_pulling_pos
	function
	__i32
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{8}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_a}
	TypeConstructor{
	__vec_2__f32
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{0}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_0}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{4}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{12}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_b}
	TypeConstructor{
	__vec_3__f32
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_1}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{0}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_1}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{4}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_1}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{8}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	Assignment{
	Identifier{_tint_pulling_pos}
	Binary{
	Binary{
	Identifier{_tint_pulling_vertex_index}
	multiply
	ScalarConstructor{16}
	}
	add
	ScalarConstructor{0}
	}
	}
	Assignment{
	Identifier{var_c}
	TypeConstructor{
	__vec_4__f32
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_2}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{0}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_2}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{4}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_2}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{8}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	Bitcast<__f32>{
	ArrayAccessor{
	MemberAccessor{
	Identifier{_tint_pulling_vertex_buffer_2}
	Identifier{_tint_vertex_data}
	}
	Binary{
	Binary{
	Identifier{_tint_pulling_pos}
	add
	ScalarConstructor{12}
	}
	divide
	ScalarConstructor{4}
	}
	}
	}
	}
	}
	}
	}
	}
	)",
	mod()->to_str());
	}

	} // namespace
	} // namespace transform
	} // namespace tint