src/tint/lang/core/ir/undef_test.cc

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#include "src/tint/lang/core/ir/undef.h"

#include "src/tint/lang/core/ir/ir_helper_test.h"

namespace tint::core::ir {
namespace {

using IR_UndefTest = IRTestHelper;
using IR_UndefDeathTest = IR_UndefTest;

TEST_F(IR_UndefDeathTest, Fail_NullType) {
    EXPECT_DEATH_IF_SUPPORTED(
        {
            Module mod;
            mod.CreateValue<Undef>(nullptr);
        },
        "internal compiler error");
}

TEST_F(IR_UndefTest, Type) {
    auto* undef = mod.CreateValue<Undef>(ty.i32());
    EXPECT_EQ(ty.i32(), undef->Type());
    EXPECT_TRUE(undef->Is<Undef>());
    EXPECT_TRUE(undef->Is<Value>());
}

TEST_F(IR_UndefTest, Clone) {
    auto* undef = mod.CreateValue<Undef>(ty.i32());
    auto* new_undef = clone_ctx.Clone(undef);

    EXPECT_NE(undef, new_undef);
    EXPECT_EQ(ty.i32(), new_undef->Type());
    EXPECT_TRUE(new_undef->Is<Undef>());
}

TEST_F(IR_UndefTest, Usages) {
    auto* undef = mod.CreateValue<Undef>(ty.i32());
    EXPECT_FALSE(undef->IsUsed());
    EXPECT_EQ(0u, undef->NumUsages());

    auto* let = b.Let("l", undef);
    EXPECT_TRUE(undef->IsUsed());
    EXPECT_EQ(1u, undef->NumUsages());
    EXPECT_TRUE(undef->HasUsage(let, 0u));
}

TEST_F(IR_UndefTest, Destroy) {
    auto* undef = mod.CreateValue<Undef>(ty.i32());
    EXPECT_TRUE(undef->Alive());
    undef->Destroy();
    EXPECT_FALSE(undef->Alive());
}

}  // namespace
}  // namespace tint::core::ir