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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 <memory>
#include "gtest/gtest.h"
#include "src/ast/assignment_statement.h"
#include "src/ast/break_statement.h"
#include "src/ast/continue_statement.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/loop_statement.h"
#include "src/ast/scalar_constructor_expression.h"
#include "src/ast/sint_literal.h"
#include "src/ast/type/i32_type.h"
#include "src/context.h"
#include "src/type_determiner.h"
#include "src/writer/spirv/builder.h"
#include "src/writer/spirv/spv_dump.h"
namespace tint {
namespace writer {
namespace spirv {
namespace {
using BuilderTest = testing::Test;
TEST_F(BuilderTest, Loop_Empty) {
// loop {
// }
ast::LoopStatement expr;
Context ctx;
ast::Module mod;
TypeDeterminer td(&ctx, &mod);
ASSERT_TRUE(td.DetermineResultType(&expr)) << td.error();
Builder b(&mod);
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(&expr)) << b.error();
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %1
%1 = OpLabel
OpLoopMerge %2 %3 None
OpBranch %4
%4 = OpLabel
OpBranch %3
%3 = OpLabel
OpBranch %1
%2 = OpLabel
)");
}
TEST_F(BuilderTest, Loop_WithoutContinuing) {
ast::type::I32Type i32;
// loop {
// v = 2;
// }
auto var =
std::make_unique<ast::Variable>("v", ast::StorageClass::kPrivate, &i32);
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::AssignmentStatement>(
std::make_unique<ast::IdentifierExpression>("v"),
std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2))));
ast::LoopStatement expr(std::move(body),
std::make_unique<ast::BlockStatement>());
Context ctx;
ast::Module mod;
TypeDeterminer td(&ctx, &mod);
td.RegisterVariableForTesting(var.get());
ASSERT_TRUE(td.DetermineResultType(&expr)) << td.error();
Builder b(&mod);
b.push_function(Function{});
ASSERT_TRUE(b.GenerateGlobalVariable(var.get())) << b.error();
EXPECT_TRUE(b.GenerateLoopStatement(&expr)) << b.error();
EXPECT_EQ(DumpInstructions(b.types()), R"(%3 = OpTypeInt 32 1
%2 = OpTypePointer Private %3
%4 = OpConstantNull %3
%1 = OpVariable %2 Private %4
%9 = OpConstant %3 2
)");
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %5
%5 = OpLabel
OpLoopMerge %6 %7 None
OpBranch %8
%8 = OpLabel
OpStore %1 %9
OpBranch %7
%7 = OpLabel
OpBranch %5
%6 = OpLabel
)");
}
TEST_F(BuilderTest, Loop_WithContinuing) {
ast::type::I32Type i32;
// loop {
// a = 2;
// continuing {
// a = 3;
// }
// }
auto var =
std::make_unique<ast::Variable>("v", ast::StorageClass::kPrivate, &i32);
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::AssignmentStatement>(
std::make_unique<ast::IdentifierExpression>("v"),
std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 2))));
auto continuing = std::make_unique<ast::BlockStatement>();
continuing->append(std::make_unique<ast::AssignmentStatement>(
std::make_unique<ast::IdentifierExpression>("v"),
std::make_unique<ast::ScalarConstructorExpression>(
std::make_unique<ast::SintLiteral>(&i32, 3))));
ast::LoopStatement expr(std::move(body), std::move(continuing));
Context ctx;
ast::Module mod;
TypeDeterminer td(&ctx, &mod);
td.RegisterVariableForTesting(var.get());
ASSERT_TRUE(td.DetermineResultType(&expr)) << td.error();
Builder b(&mod);
b.push_function(Function{});
ASSERT_TRUE(b.GenerateGlobalVariable(var.get())) << b.error();
EXPECT_TRUE(b.GenerateLoopStatement(&expr)) << b.error();
EXPECT_EQ(DumpInstructions(b.types()), R"(%3 = OpTypeInt 32 1
%2 = OpTypePointer Private %3
%4 = OpConstantNull %3
%1 = OpVariable %2 Private %4
%9 = OpConstant %3 2
%10 = OpConstant %3 3
)");
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %5
%5 = OpLabel
OpLoopMerge %6 %7 None
OpBranch %8
%8 = OpLabel
OpStore %1 %9
OpBranch %7
%7 = OpLabel
OpStore %1 %10
OpBranch %5
%6 = OpLabel
)");
}
TEST_F(BuilderTest, Loop_WithContinue) {
// loop {
// continue;
// }
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::ContinueStatement>());
ast::LoopStatement expr(std::move(body),
std::make_unique<ast::BlockStatement>());
Context ctx;
ast::Module mod;
TypeDeterminer td(&ctx, &mod);
ASSERT_TRUE(td.DetermineResultType(&expr)) << td.error();
Builder b(&mod);
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(&expr)) << b.error();
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %1
%1 = OpLabel
OpLoopMerge %2 %3 None
OpBranch %4
%4 = OpLabel
OpBranch %3
%3 = OpLabel
OpBranch %1
%2 = OpLabel
)");
}
TEST_F(BuilderTest, Loop_WithBreak) {
// loop {
// break;
// }
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::BreakStatement>());
ast::LoopStatement expr(std::move(body),
std::make_unique<ast::BlockStatement>());
Context ctx;
ast::Module mod;
TypeDeterminer td(&ctx, &mod);
ASSERT_TRUE(td.DetermineResultType(&expr)) << td.error();
Builder b(&mod);
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(&expr)) << b.error();
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %1
%1 = OpLabel
OpLoopMerge %2 %3 None
OpBranch %4
%4 = OpLabel
OpBranch %2
%3 = OpLabel
OpBranch %1
%2 = OpLabel
)");
}
} // namespace
} // namespace spirv
} // namespace writer
} // namespace tint