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// 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/validator_impl.h"
#include "gtest/gtest.h"
#include "spirv/unified1/GLSL.std.450.h"
#include "src/ast/case_statement.h"
#include "src/ast/fallthrough_statement.h"
#include "src/ast/return_statement.h"
#include "src/ast/scalar_constructor_expression.h"
#include "src/ast/sint_literal.h"
#include "src/ast/switch_statement.h"
#include "src/ast/type/alias_type.h"
#include "src/ast/type/f32_type.h"
#include "src/ast/type/i32_type.h"
#include "src/ast/type/u32_type.h"
#include "src/ast/uint_literal.h"
#include "src/ast/variable.h"
#include "src/ast/variable_decl_statement.h"
#include "src/type_determiner.h"
#include "src/validator_test_helper.h"
namespace tint {
namespace {
class ValidateControlBlockTest : public ValidatorTestHelper,
public testing::Test {};
TEST_F(ValidateControlBlockTest, SwitchSelectorExpressionNoneIntegerType_Fail) {
// var a : f32 = 3.14;
// switch (a) {
// default: {}
// }
ast::type::F32Type f32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &f32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&f32, 3.14f)));
auto cond = std::make_unique<ast::IdentifierExpression>(Source{12, 34}, "a");
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
ast::CaseStatementList body;
body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(
std::make_unique<ast::SwitchStatement>(std::move(cond), std::move(body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0025: switch statement selector expression must be "
"of a scalar integer type");
}
TEST_F(ValidateControlBlockTest, SwitchWithoutDefault_Fail) {
// var a : i32 = 2;
// switch (a) {
// case 1: {}
// }
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList csl;
csl.push_back(std::make_unique<ast::SintLiteral>(&i32, 1));
ast::CaseStatementList body;
body.push_back(std::make_unique<ast::CaseStatement>(
std::move(csl), std::make_unique<ast::BlockStatement>()));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(
Source{12, 34}, std::move(cond), std::move(body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0008: switch statement must have exactly one default "
"clause");
}
TEST_F(ValidateControlBlockTest, SwitchWithTwoDefault_Fail) {
// var a : i32 = 2;
// switch (a) {
// default: {}
// case 1: {}
// default: {}
// }
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
ast::CaseStatementList switch_body;
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList default_csl_1;
auto block_default_1 = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl_1), std::move(block_default_1)));
ast::CaseSelectorList csl_case_1;
csl_case_1.push_back(std::make_unique<ast::SintLiteral>(&i32, 1));
auto block_case_1 = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(csl_case_1), std::move(block_case_1)));
ast::CaseSelectorList default_csl_2;
auto block_default_2 = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl_2), std::move(block_default_2)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(
Source{12, 34}, std::move(cond), std::move(switch_body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0008: switch statement must have exactly one default "
"clause");
}
TEST_F(ValidateControlBlockTest,
SwitchConditionTypeMustMatchSelectorType2_Fail) {
// var a : i32 = 2;
// switch (a) {
// case 1: {}
// default: {}
// }
ast::type::U32Type u32;
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
ast::CaseStatementList switch_body;
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList csl;
csl.push_back(std::make_unique<ast::UintLiteral>(&u32, 1));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(csl), std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(std::move(cond),
std::move(switch_body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0026: the case selector values must have the same "
"type as the selector expression.");
}
TEST_F(ValidateControlBlockTest,
SwitchConditionTypeMustMatchSelectorType_Fail) {
// var a : u32 = 2;
// switch (a) {
// case -1: {}
// default: {}
// }
ast::type::U32Type u32;
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &u32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::UintLiteral>(&u32, 2)));
ast::CaseStatementList switch_body;
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList csl;
csl.push_back(std::make_unique<ast::SintLiteral>(&i32, -1));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(csl), std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(std::move(cond),
std::move(switch_body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0026: the case selector values must have the same "
"type as the selector expression.");
}
TEST_F(ValidateControlBlockTest, NonUniqueCaseSelectorValueUint_Fail) {
// var a : u32 = 3;
// switch (a) {
// case 0: {}
// case 2, 2: {}
// default: {}
// }
ast::type::U32Type u32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &u32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::UintLiteral>(&u32, 3)));
ast::CaseStatementList switch_body;
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList csl_1;
csl_1.push_back(std::make_unique<ast::UintLiteral>(&u32, 0));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(csl_1), std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList csl_2;
csl_2.push_back(std::make_unique<ast::UintLiteral>(&u32, 2));
csl_2.push_back(std::make_unique<ast::UintLiteral>(&u32, 2));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(csl_2),
std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(std::move(cond),
std::move(switch_body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0027: a literal value must not appear more than once "
"in the case selectors for a switch statement: '2'");
}
TEST_F(ValidateControlBlockTest, NonUniqueCaseSelectorValueSint_Fail) {
// var a : i32 = 2;
// switch (a) {
// case 10: {}
// case 0,1,2,10: {}
// default: {}
// }
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
ast::CaseStatementList switch_body;
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList csl_1;
csl_1.push_back(std::make_unique<ast::SintLiteral>(&i32, 10));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(csl_1), std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList csl_2;
csl_2.push_back(std::make_unique<ast::SintLiteral>(&i32, 0));
csl_2.push_back(std::make_unique<ast::SintLiteral>(&i32, 1));
csl_2.push_back(std::make_unique<ast::SintLiteral>(&i32, 2));
csl_2.push_back(std::make_unique<ast::SintLiteral>(&i32, 10));
switch_body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(csl_2),
std::make_unique<ast::BlockStatement>()));
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
switch_body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(std::make_unique<ast::SwitchStatement>(std::move(cond),
std::move(switch_body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0027: a literal value must not appear more than once in "
"the case selectors for a switch statement: '10'");
}
TEST_F(ValidateControlBlockTest, LastClauseLastStatementIsFallthrough_Fail) {
// var a : i32 = 2;
// switch (a) {
// default: { fallthrough; }
// }
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
block_default->append(
std::make_unique<ast::FallthroughStatement>(Source{12, 34}));
ast::CaseStatementList body;
body.push_back(std::make_unique<ast::CaseStatement>(
std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(
std::make_unique<ast::SwitchStatement>(std::move(cond), std::move(body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_FALSE(v()->ValidateStatements(block.get()));
EXPECT_EQ(v()->error(),
"12:34: v-0028: a fallthrough statement must not appear as the "
"last statement in last clause of a switch");
}
TEST_F(ValidateControlBlockTest, SwitchCase_Pass) {
// var a : i32 = 2;
// switch (a) {
// default: {}
// case 5: {}
// }
ast::type::I32Type i32;
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &i32);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2)));
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
ast::CaseStatementList body;
body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(default_csl), std::move(block_default)));
ast::CaseSelectorList case_csl;
case_csl.push_back(std::make_unique<ast::SintLiteral>(&i32, 5));
auto block_case = std::make_unique<ast::BlockStatement>();
body.push_back(std::make_unique<ast::CaseStatement>(std::move(case_csl),
std::move(block_case)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(
std::make_unique<ast::SwitchStatement>(std::move(cond), std::move(body)));
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_TRUE(v()->ValidateStatements(block.get())) << v()->error();
}
TEST_F(ValidateControlBlockTest, SwitchCaseAlias_Pass) {
// type MyInt = u32;
// var v: MyInt;
// switch(v){
// default: {}
// }
ast::type::U32Type u32;
ast::type::AliasType my_int{"MyInt", &u32};
auto var =
std::make_unique<ast::Variable>("a", ast::StorageClass::kNone, &my_int);
var->set_constructor(std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&u32, 2)));
auto cond = std::make_unique<ast::IdentifierExpression>("a");
ast::CaseSelectorList default_csl;
auto block_default = std::make_unique<ast::BlockStatement>();
ast::CaseStatementList body;
body.push_back(std::make_unique<ast::CaseStatement>(
Source{12, 34}, std::move(default_csl), std::move(block_default)));
auto block = std::make_unique<ast::BlockStatement>();
block->append(std::make_unique<ast::VariableDeclStatement>(std::move(var)));
block->append(
std::make_unique<ast::SwitchStatement>(std::move(cond), std::move(body)));
mod()->AddConstructedType(&my_int);
EXPECT_TRUE(td()->DetermineStatements(block.get())) << td()->error();
EXPECT_TRUE(v()->ValidateStatements(block.get())) << v()->error();
}
} // namespace
} // namespace tint
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