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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/writer/spirv/spv_dump.h"
#include "src/writer/spirv/test_helper.h"
namespace tint {
namespace writer {
namespace spirv {
namespace {
using BuilderTest = TestHelper;
TEST_F(BuilderTest, Loop_Empty) {
// loop {
// }
auto* loop = Loop(Block(), Block());
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << 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) {
// loop {
// v = 2;
// }
auto* var = Global("v", ty.i32(), ast::StorageClass::kPrivate);
auto* body = Block(Assign("v", 2));
auto* loop = Loop(body, Block());
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
ASSERT_TRUE(b.GenerateGlobalVariable(var)) << b.error();
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << 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) {
// loop {
// a = 2;
// continuing {
// a = 3;
// }
// }
auto* var = Global("v", ty.i32(), ast::StorageClass::kPrivate);
auto* body = Block(Assign("v", 2));
auto* continuing = Block(Assign("v", 3));
auto* loop = Loop(body, continuing);
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
ASSERT_TRUE(b.GenerateGlobalVariable(var)) << b.error();
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << 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_WithBodyVariableAccessInContinuing) {
// loop {
// var a : i32;
// continuing {
// a = 3;
// }
// }
auto* var = Var("a", ty.i32());
auto* var_decl = WrapInStatement(var);
auto* body = Block(var_decl);
auto* continuing = Block(Assign("a", 3));
auto* loop = Loop(body, continuing);
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << b.error();
EXPECT_EQ(DumpInstructions(b.types()), R"(%7 = OpTypeInt 32 1
%6 = OpTypePointer Function %7
%8 = OpConstantNull %7
%9 = OpConstant %7 3
)");
EXPECT_EQ(DumpInstructions(b.functions()[0].instructions()),
R"(OpBranch %1
%1 = OpLabel
OpLoopMerge %2 %3 None
OpBranch %4
%4 = OpLabel
OpBranch %3
%3 = OpLabel
OpStore %5 %9
OpBranch %1
%2 = OpLabel
)");
}
TEST_F(BuilderTest, Loop_WithContinue) {
// loop {
// continue;
// }
auto* body = Block(create<ast::ContinueStatement>());
auto* loop = Loop(body, Block());
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << 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 = Block(create<ast::BreakStatement>());
auto* loop = Loop(body, Block());
WrapInFunction(loop);
spirv::Builder& b = Build();
b.push_function(Function{});
EXPECT_TRUE(b.GenerateLoopStatement(loop)) << 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