src/tint/lang/glsl/writer/var_and_let_test.cc - dawn - Git at Google

 // Copyright 2024 The Dawn & Tint Authors
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 // 1. Redistributions of source code must retain the above copyright notice, this
 //    list of conditions and the following disclaimer.
 //
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 //    this list of conditions and the following disclaimer in the documentation
 //    and/or other materials provided with the distribution.
 //
 // 3. Neither the name of the copyright holder nor the names of its
 //    contributors may be used to endorse or promote products derived from
 //    this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include "src/tint/lang/core/type/depth_texture.h"
 #include "src/tint/lang/core/type/storage_texture.h"
 #include "src/tint/lang/glsl/writer/helper_test.h"

 using namespace tint::core::fluent_types;     // NOLINT
 using namespace tint::core::number_suffixes;  // NOLINT

 namespace tint::glsl::writer {
 namespace {

 TEST_F(GlslWriterTest, Let) {
     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
     func->SetWorkgroupSize(1, 1, 1);
     b.Append(func->Block(), [&] {
         b.Let("a", 2_f);
         b.Return(func);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
   float a = 2.0f;
 }
 )");
 }

 TEST_F(GlslWriterTest, LetValue) {
     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
     func->SetWorkgroupSize(1, 1, 1);
     b.Append(func->Block(), [&] {
         auto* a = b.Let("a", 2_f);
         b.Let("b", a);
         b.Return(func);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
   float a = 2.0f;
   float b = a;
 }
 )");
 }

 TEST_F(GlslWriterTest, Var) {
     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
     func->SetWorkgroupSize(1, 1, 1);
     b.Append(func->Block(), [&] {
         b.Var("a", 1_u);
         b.Return(func);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
   uint a = 1u;
 }
 )");
 }

 TEST_F(GlslWriterTest, VarZeroInit) {
     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
     func->SetWorkgroupSize(1, 1, 1);
     b.Append(func->Block(), [&] {
         b.Var("a", function, ty.f32());
         b.Return(func);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
   float a = 0.0f;
 }
 )");
 }

 // Not emitted in GLSL
 TEST_F(GlslWriterTest, VarSampler) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kHandle, ty.sampler()));
         v->SetBindingPoint(1, 2);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 // Not emitted in GLSL
 TEST_F(GlslWriterTest, VarInBuiltin) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kIn, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.builtin = core::BuiltinValue::kLocalInvocationIndex;
         v->SetAttributes(attrs);
         v->SetBindingPoint(1, 2);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarIn) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kIn, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.location = 1;
         attrs.interpolation = {core::InterpolationType::kFlat,
                                core::InterpolationSampling::kUndefined};
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });
     ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
 precision highp int;


 layout(location = 1) flat in uint v;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarOutBlendSrc) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.location = 1;
         attrs.blend_src = 1;
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });

     ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_EXT_blend_func_extended: require
 precision highp float;
 precision highp int;


 layout(location = 1, index = 1) out uint v;
 void main() {
 }
 )");
 }

 // Not emitted in GLSL
 TEST_F(GlslWriterTest, VarOutBuiltin) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.builtin = core::BuiltinValue::kFragDepth;
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });

     ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
 precision highp int;


 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarBuiltinSampleIndex_ES) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.builtin = core::BuiltinValue::kSampleIndex;
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });

     ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_OES_sample_variables: require
 precision highp float;
 precision highp int;


 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarBuiltinSampleMask_ES) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.builtin = core::BuiltinValue::kSampleMask;
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });

     ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_OES_sample_variables: require
 precision highp float;
 precision highp int;


 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarBuiltinSampled_NonES) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
         core::IOAttributes attrs = {};
         attrs.builtin = core::BuiltinValue::kSampleIndex;
         v->SetAttributes(attrs);
     });

     auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
     b.Append(func->Block(), [&] { b.Return(func); });

     Options opts{};
     opts.version = Version(Version::Standard::kDesktop, 4, 6);
     ASSERT_TRUE(Generate(opts, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, R"(#version 460
 precision highp float;
 precision highp int;


 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarStorageUint32) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kStorage, ty.u32()));
         v->SetBindingPoint(0, 1);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(binding = 1, std430)
 buffer tint_symbol_1_1_ssbo {
   uint tint_symbol;
 } v_1;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarStorageStruct) {
     auto* sb = ty.Struct(mod.symbols.New("SB"), {
                                                     {mod.symbols.New("a"), ty.i32()},
                                                     {mod.symbols.New("b"), ty.f32()},
                                                 });

     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kStorage, sb));
         v->SetBindingPoint(0, 1);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 struct SB {
   int a;
   float b;
 };

 layout(binding = 1, std430)
 buffer tint_symbol_1_1_ssbo {
   SB tint_symbol;
 } v_1;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarUniform) {
     b.Append(b.ir.root_block, [&] {
         auto* v = b.Var("v", ty.ptr(core::AddressSpace::kUniform, ty.u32()));
         v->SetBindingPoint(0, 1);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(binding = 1, std140)
 uniform tint_symbol_1_1_ubo {
   uint tint_symbol;
 } v_1;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarHandleStorageTexture) {
     b.Append(b.ir.root_block, [&] {
         auto* v =
             b.Var("v", ty.ptr(core::AddressSpace::kHandle,
                               ty.Get<core::type::StorageTexture>(core::type::TextureDimension::k2d,
                                                                  core::TexelFormat::kR32Float,
                                                                  core::Access::kWrite, ty.f32())));
         v->SetBindingPoint(0, 1);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 layout(binding = 1, r32f) uniform highp writeonly image2D v;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarHandleDepthTexture) {
     b.Append(b.ir.root_block, [&] {
         auto* v =
             b.Var("v", ty.ptr(core::AddressSpace::kHandle,
                               ty.Get<core::type::DepthTexture>(core::type::TextureDimension::k2d)));
         v->SetBindingPoint(0, 1);
     });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 uniform highp sampler2DShadow v;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 TEST_F(GlslWriterTest, VarWorkgroup) {
     b.Append(b.ir.root_block,
              [&] { b.Var("v", ty.ptr(core::AddressSpace::kWorkgroup, ty.u32())); });

     ASSERT_TRUE(Generate()) << err_ << output_.glsl;
     EXPECT_EQ(output_.glsl, GlslHeader() + R"(
 shared uint v;
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void main() {
 }
 )");
 }

 }  // namespace
 }  // namespace tint::glsl::writer
	// Copyright 2024 The Dawn & Tint Authors
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// 1. Redistributions of source code must retain the above copyright notice, this
	// list of conditions and the following disclaimer.
	//
	// 2. Redistributions in binary form must reproduce the above copyright notice,
	// this list of conditions and the following disclaimer in the documentation
	// and/or other materials provided with the distribution.
	//
	// 3. Neither the name of the copyright holder nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include "src/tint/lang/core/type/depth_texture.h"
	#include "src/tint/lang/core/type/storage_texture.h"
	#include "src/tint/lang/glsl/writer/helper_test.h"

	using namespace tint::core::fluent_types; // NOLINT
	using namespace tint::core::number_suffixes; // NOLINT

	namespace tint::glsl::writer {
	namespace {

	TEST_F(GlslWriterTest, Let) {
	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
	func->SetWorkgroupSize(1, 1, 1);
	b.Append(func->Block(), [&] {
	b.Let("a", 2_f);
	b.Return(func);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	float a = 2.0f;
	}
	)");
	}

	TEST_F(GlslWriterTest, LetValue) {
	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
	func->SetWorkgroupSize(1, 1, 1);
	b.Append(func->Block(), [&] {
	auto* a = b.Let("a", 2_f);
	b.Let("b", a);
	b.Return(func);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	float a = 2.0f;
	float b = a;
	}
	)");
	}

	TEST_F(GlslWriterTest, Var) {
	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
	func->SetWorkgroupSize(1, 1, 1);
	b.Append(func->Block(), [&] {
	b.Var("a", 1_u);
	b.Return(func);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	uint a = 1u;
	}
	)");
	}

	TEST_F(GlslWriterTest, VarZeroInit) {
	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kCompute);
	func->SetWorkgroupSize(1, 1, 1);
	b.Append(func->Block(), [&] {
	b.Var("a", function, ty.f32());
	b.Return(func);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	float a = 0.0f;
	}
	)");
	}

	// Not emitted in GLSL
	TEST_F(GlslWriterTest, VarSampler) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kHandle, ty.sampler()));
	v->SetBindingPoint(1, 2);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	// Not emitted in GLSL
	TEST_F(GlslWriterTest, VarInBuiltin) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kIn, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.builtin = core::BuiltinValue::kLocalInvocationIndex;
	v->SetAttributes(attrs);
	v->SetBindingPoint(1, 2);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarIn) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kIn, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.location = 1;
	attrs.interpolation = {core::InterpolationType::kFlat,
	core::InterpolationSampling::kUndefined};
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });
	ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
	precision highp int;


	layout(location = 1) flat in uint v;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarOutBlendSrc) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.location = 1;
	attrs.blend_src = 1;
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });

	ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_EXT_blend_func_extended: require
	precision highp float;
	precision highp int;


	layout(location = 1, index = 1) out uint v;
	void main() {
	}
	)");
	}

	// Not emitted in GLSL
	TEST_F(GlslWriterTest, VarOutBuiltin) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.builtin = core::BuiltinValue::kFragDepth;
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });

	ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(precision highp float;
	precision highp int;


	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarBuiltinSampleIndex_ES) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.builtin = core::BuiltinValue::kSampleIndex;
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });

	ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_OES_sample_variables: require
	precision highp float;
	precision highp int;


	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarBuiltinSampleMask_ES) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.builtin = core::BuiltinValue::kSampleMask;
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });

	ASSERT_TRUE(Generate({}, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(#extension GL_OES_sample_variables: require
	precision highp float;
	precision highp int;


	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarBuiltinSampled_NonES) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kOut, ty.u32()));
	core::IOAttributes attrs = {};
	attrs.builtin = core::BuiltinValue::kSampleIndex;
	v->SetAttributes(attrs);
	});

	auto* func = b.Function("main", ty.void_(), core::ir::Function::PipelineStage::kFragment);
	b.Append(func->Block(), [&] { b.Return(func); });

	Options opts{};
	opts.version = Version(Version::Standard::kDesktop, 4, 6);
	ASSERT_TRUE(Generate(opts, tint::ast::PipelineStage::kFragment)) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, R"(#version 460
	precision highp float;
	precision highp int;


	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarStorageUint32) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kStorage, ty.u32()));
	v->SetBindingPoint(0, 1);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(binding = 1, std430)
	buffer tint_symbol_1_1_ssbo {
	uint tint_symbol;
	} v_1;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarStorageStruct) {
	auto* sb = ty.Struct(mod.symbols.New("SB"), {
	{mod.symbols.New("a"), ty.i32()},
	{mod.symbols.New("b"), ty.f32()},
	});

	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kStorage, sb));
	v->SetBindingPoint(0, 1);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	struct SB {
	int a;
	float b;
	};

	layout(binding = 1, std430)
	buffer tint_symbol_1_1_ssbo {
	SB tint_symbol;
	} v_1;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarUniform) {
	b.Append(b.ir.root_block, [&] {
	auto* v = b.Var("v", ty.ptr(core::AddressSpace::kUniform, ty.u32()));
	v->SetBindingPoint(0, 1);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(binding = 1, std140)
	uniform tint_symbol_1_1_ubo {
	uint tint_symbol;
	} v_1;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarHandleStorageTexture) {
	b.Append(b.ir.root_block, [&] {
	auto* v =
	b.Var("v", ty.ptr(core::AddressSpace::kHandle,
	ty.Get<core::type::StorageTexture>(core::type::TextureDimension::k2d,
	core::TexelFormat::kR32Float,
	core::Access::kWrite, ty.f32())));
	v->SetBindingPoint(0, 1);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	layout(binding = 1, r32f) uniform highp writeonly image2D v;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarHandleDepthTexture) {
	b.Append(b.ir.root_block, [&] {
	auto* v =
	b.Var("v", ty.ptr(core::AddressSpace::kHandle,
	ty.Get<core::type::DepthTexture>(core::type::TextureDimension::k2d)));
	v->SetBindingPoint(0, 1);
	});

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	uniform highp sampler2DShadow v;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	TEST_F(GlslWriterTest, VarWorkgroup) {
	b.Append(b.ir.root_block,
	[&] { b.Var("v", ty.ptr(core::AddressSpace::kWorkgroup, ty.u32())); });

	ASSERT_TRUE(Generate()) << err_ << output_.glsl;
	EXPECT_EQ(output_.glsl, GlslHeader() + R"(
	shared uint v;
	layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
	void main() {
	}
	)");
	}

	} // namespace
	} // namespace tint::glsl::writer