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// Copyright (c) 2017 Google Inc.
//
// 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 <vector>
#include "gmock/gmock.h"
#include "source/opt/dominator_analysis.h"
#include "source/opt/pass.h"
#include "test/opt/assembly_builder.h"
#include "test/opt/function_utils.h"
#include "test/opt/pass_fixture.h"
#include "test/opt/pass_utils.h"
namespace spvtools {
namespace opt {
namespace {
using ::testing::UnorderedElementsAre;
using PassClassTest = PassTest<::testing::Test>;
/*
Generated from the following GLSL
#version 440 core
void main() {
for (int i = 0; i < 1; i++) {
break;
}
}
*/
TEST_F(PassClassTest, UnreachableNestedIfs) {
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %8 "i"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 0
%16 = OpConstant %6 1
%17 = OpTypeBool
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
OpStore %8 %9
OpBranch %10
%10 = OpLabel
OpLoopMerge %12 %13 None
OpBranch %14
%14 = OpLabel
%15 = OpLoad %6 %8
%18 = OpSLessThan %17 %15 %16
OpBranchConditional %18 %11 %12
%11 = OpLabel
OpBranch %12
%13 = OpLabel
%20 = OpLoad %6 %8
%21 = OpIAdd %6 %20 %16
OpStore %8 %21
OpBranch %10
%12 = OpLabel
OpReturn
OpFunctionEnd
)";
// clang-format on
std::unique_ptr<IRContext> context =
BuildModule(SPV_ENV_UNIVERSAL_1_1, nullptr, text,
SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS);
Module* module = context->module();
EXPECT_NE(nullptr, module) << "Assembling failed for shader:\n"
<< text << std::endl;
const Function* f = spvtest::GetFunction(module, 4);
DominatorAnalysis* analysis = context->GetDominatorAnalysis(f);
EXPECT_TRUE(analysis->Dominates(5, 5));
EXPECT_TRUE(analysis->Dominates(5, 10));
EXPECT_TRUE(analysis->Dominates(5, 14));
EXPECT_TRUE(analysis->Dominates(5, 11));
EXPECT_TRUE(analysis->Dominates(5, 12));
EXPECT_TRUE(analysis->Dominates(10, 10));
EXPECT_TRUE(analysis->Dominates(10, 14));
EXPECT_TRUE(analysis->Dominates(10, 11));
EXPECT_TRUE(analysis->Dominates(10, 12));
EXPECT_TRUE(analysis->Dominates(14, 14));
EXPECT_TRUE(analysis->Dominates(14, 11));
EXPECT_TRUE(analysis->Dominates(14, 12));
EXPECT_TRUE(analysis->Dominates(11, 11));
EXPECT_TRUE(analysis->Dominates(12, 12));
EXPECT_TRUE(analysis->StrictlyDominates(5, 10));
EXPECT_TRUE(analysis->StrictlyDominates(5, 14));
EXPECT_TRUE(analysis->StrictlyDominates(5, 11));
EXPECT_TRUE(analysis->StrictlyDominates(5, 12));
EXPECT_TRUE(analysis->StrictlyDominates(10, 14));
EXPECT_TRUE(analysis->StrictlyDominates(10, 11));
EXPECT_TRUE(analysis->StrictlyDominates(10, 12));
EXPECT_TRUE(analysis->StrictlyDominates(14, 11));
EXPECT_TRUE(analysis->StrictlyDominates(14, 12));
}
} // namespace
} // namespace opt
} // namespace spvtools
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