src/tint/lang/glsl/writer/var_and_let_test.cc

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#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;
}
)");
}

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