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// Copyright 2021 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/tint/ast/variable_decl_statement.h"
#include "src/tint/writer/glsl/test_helper.h"
using namespace tint::number_suffixes; // NOLINT
namespace tint::writer::glsl {
namespace {
using GlslGeneratorImplTest_Loop = TestHelper;
TEST_F(GlslGeneratorImplTest_Loop, Emit_Loop) {
auto* body = Block(create<ast::DiscardStatement>());
auto* continuing = Block();
auto* l = Loop(body, continuing);
WrapInFunction(l);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(l)) << gen.error();
EXPECT_EQ(gen.result(), R"( while (true) {
discard;
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_LoopWithContinuing) {
Func("a_statement", {}, ty.void_(), {});
auto* body = Block(create<ast::DiscardStatement>());
auto* continuing = Block(CallStmt(Call("a_statement")));
auto* l = Loop(body, continuing);
WrapInFunction(l);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(l)) << gen.error();
EXPECT_EQ(gen.result(), R"( while (true) {
discard;
{
a_statement();
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_LoopNestedWithContinuing) {
Func("a_statement", {}, ty.void_(), {});
Global("lhs", ty.f32(), ast::StorageClass::kPrivate);
Global("rhs", ty.f32(), ast::StorageClass::kPrivate);
auto* body = Block(create<ast::DiscardStatement>());
auto* continuing = Block(CallStmt(Call("a_statement")));
auto* inner = Loop(body, continuing);
body = Block(inner);
auto* lhs = Expr("lhs");
auto* rhs = Expr("rhs");
continuing = Block(Assign(lhs, rhs));
auto* outer = Loop(body, continuing);
WrapInFunction(outer);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(outer)) << gen.error();
EXPECT_EQ(gen.result(), R"( while (true) {
while (true) {
discard;
{
a_statement();
}
}
{
lhs = rhs;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_LoopWithVarUsedInContinuing) {
// loop {
// var lhs : f32 = 2.4;
// var other : f32;
// break;
// continuing {
// lhs = rhs
// }
// }
Global("rhs", ty.f32(), ast::StorageClass::kPrivate);
auto* body = Block(Decl(Var("lhs", ty.f32(), Expr(2.4_f))), //
Decl(Var("other", ty.f32())), //
Break());
auto* continuing = Block(Assign("lhs", "rhs"));
auto* outer = Loop(body, continuing);
WrapInFunction(outer);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(outer)) << gen.error();
EXPECT_EQ(gen.result(), R"( while (true) {
float lhs = 2.400000095f;
float other = 0.0f;
break;
{
lhs = rhs;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoop) {
// for(; ; ) {
// return;
// }
auto* f = For(nullptr, nullptr, nullptr, //
Block(Return()));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
for(; ; ) {
return;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithSimpleInit) {
// for(var i : i32; ; ) {
// return;
// }
auto* f = For(Decl(Var("i", ty.i32())), nullptr, nullptr, //
Block(Return()));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
for(int i = 0; ; ) {
return;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithMultiStmtInit) {
// for(var b = true && false; ; ) {
// return;
// }
auto* multi_stmt =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* f = For(Decl(Var("b", nullptr, multi_stmt)), nullptr, nullptr, Block(Return()));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
bool tint_tmp = true;
if (tint_tmp) {
tint_tmp = false;
}
bool b = (tint_tmp);
for(; ; ) {
return;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithSimpleCond) {
// for(; true; ) {
// return;
// }
Func("a_statement", {}, ty.void_(), {});
auto* f = For(nullptr, true, nullptr, Block(CallStmt(Call("a_statement"))));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
for(; true; ) {
a_statement();
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithMultiStmtCond) {
// for(; true && false; ) {
// return;
// }
Func("a_statement", {}, ty.void_(), {});
auto* multi_stmt =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* f = For(nullptr, multi_stmt, nullptr, Block(CallStmt(Call("a_statement"))));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
while (true) {
bool tint_tmp = true;
if (tint_tmp) {
tint_tmp = false;
}
if (!((tint_tmp))) { break; }
a_statement();
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithSimpleCont) {
// for(; ; i = i + 1i) {
// return;
// }
auto* v = Decl(Var("i", ty.i32()));
auto* f = For(nullptr, nullptr, Assign("i", Add("i", 1_i)), //
Block(Return()));
WrapInFunction(v, f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
for(; ; i = (i + 1)) {
return;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithMultiStmtCont) {
// for(; ; i = true && false) {
// return;
// }
auto* multi_stmt =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* v = Decl(Var("i", ty.bool_()));
auto* f = For(nullptr, nullptr, Assign("i", multi_stmt), //
Block(Return()));
WrapInFunction(v, f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
while (true) {
return;
bool tint_tmp = true;
if (tint_tmp) {
tint_tmp = false;
}
i = (tint_tmp);
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithSimpleInitCondCont) {
// for(var i : i32; true; i = ii + 1) {
// return;
// }
auto* f = For(Decl(Var("i", ty.i32())), true, Assign("i", Add("i", 1_i)), Block(Return()));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
for(int i = 0; true; i = (i + 1)) {
return;
}
}
)");
}
TEST_F(GlslGeneratorImplTest_Loop, Emit_ForLoopWithMultiStmtInitCondCont) {
// for(var i = true && false; true && false; i = true && false) {
// return;
// }
auto* multi_stmt_a =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* multi_stmt_b =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* multi_stmt_c =
create<ast::BinaryExpression>(ast::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* f =
For(Decl(Var("i", nullptr, multi_stmt_a)), multi_stmt_b, Assign("i", multi_stmt_c), //
Block(Return()));
WrapInFunction(f);
GeneratorImpl& gen = Build();
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(f)) << gen.error();
EXPECT_EQ(gen.result(), R"( {
bool tint_tmp = true;
if (tint_tmp) {
tint_tmp = false;
}
bool i = (tint_tmp);
while (true) {
bool tint_tmp_1 = true;
if (tint_tmp_1) {
tint_tmp_1 = false;
}
if (!((tint_tmp_1))) { break; }
return;
bool tint_tmp_2 = true;
if (tint_tmp_2) {
tint_tmp_2 = false;
}
i = (tint_tmp_2);
}
}
)");
}
} // namespace
} // namespace tint::writer::glsl