src/tint/lang/spirv/writer/ast_printer/block_test.cc

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#include "src/tint/lang/spirv/writer/ast_printer/helper_test.h"
#include "src/tint/lang/spirv/writer/common/spv_dump_test.h"

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

namespace tint::spirv::writer {
namespace {

using SpirvASTPrinterTest = TestHelper;

TEST_F(SpirvASTPrinterTest, Block) {
    // Note, this test uses shadow variables which aren't allowed in WGSL but
    // serves to prove the block code is pushing new scopes as needed.
    auto* inner = Block(Decl(Var("var", ty.f32())), Assign("var", 2_f));
    auto* outer = Block(Decl(Var("var", ty.f32())), Assign("var", 1_f), inner, Assign("var", 3_f));

    WrapInFunction(outer);

    Builder& b = Build();

    b.PushFunctionForTesting();
    ASSERT_FALSE(b.has_error()) << b.Diagnostics();

    EXPECT_TRUE(b.GenerateStatement(outer)) << b.Diagnostics();
    EXPECT_FALSE(b.has_error());

    EXPECT_EQ(DumpInstructions(b.Module().Types()), R"(%3 = OpTypeFloat 32
%2 = OpTypePointer Function %3
%4 = OpConstantNull %3
%5 = OpConstant %3 1
%7 = OpConstant %3 2
%8 = OpConstant %3 3
)");

    EXPECT_EQ(DumpInstructions(b.CurrentFunction().variables()),
              R"(%1 = OpVariable %2 Function %4
%6 = OpVariable %2 Function %4
)");

    EXPECT_EQ(DumpInstructions(b.CurrentFunction().instructions()),
              R"(OpStore %1 %5
OpStore %6 %7
OpStore %1 %8
)");
}

}  // namespace
}  // namespace tint::spirv::writer