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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
layout(location = 0) out vec4 v;
layout(location = 1) in vec4 in_val;
void main() {
int i;
switch (int(in_val.x)) {
case 0:
i = 0;
case 1:
i = 1;
break;
case 2:
i = 2;
case 3:
i = 3;
case 4:
i = 4;
break;
default:
i = 0;
}
v = vec4(i, i, i, i);
}
*/
TEST_F(PassClassTest, UnreachableNestedIfs) {
const std::string text = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %9 %35
OpExecutionMode %4 OriginUpperLeft
OpSource GLSL 440
OpName %4 "main"
OpName %9 "in_val"
OpName %25 "i"
OpName %35 "v"
OpDecorate %9 Location 1
OpDecorate %35 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeFloat 32
%7 = OpTypeVector %6 4
%8 = OpTypePointer Input %7
%9 = OpVariable %8 Input
%10 = OpTypeInt 32 0
%11 = OpConstant %10 0
%12 = OpTypePointer Input %6
%15 = OpTypeInt 32 1
%24 = OpTypePointer Function %15
%26 = OpConstant %15 0
%27 = OpConstant %15 1
%29 = OpConstant %15 2
%30 = OpConstant %15 3
%31 = OpConstant %15 4
%34 = OpTypePointer Output %7
%35 = OpVariable %34 Output
%4 = OpFunction %2 None %3
%5 = OpLabel
%25 = OpVariable %24 Function
%13 = OpAccessChain %12 %9 %11
%14 = OpLoad %6 %13
%16 = OpConvertFToS %15 %14
OpSelectionMerge %23 None
OpSwitch %16 %22 0 %17 1 %18 2 %19 3 %20 4 %21
%22 = OpLabel
OpStore %25 %26
OpBranch %23
%17 = OpLabel
OpStore %25 %26
OpBranch %18
%18 = OpLabel
OpStore %25 %27
OpBranch %23
%19 = OpLabel
OpStore %25 %29
OpBranch %20
%20 = OpLabel
OpStore %25 %30
OpBranch %21
%21 = OpLabel
OpStore %25 %31
OpBranch %23
%23 = OpLabel
%36 = OpLoad %15 %25
%37 = OpConvertSToF %6 %36
%38 = OpLoad %15 %25
%39 = OpConvertSToF %6 %38
%40 = OpLoad %15 %25
%41 = OpConvertSToF %6 %40
%42 = OpLoad %15 %25
%43 = OpConvertSToF %6 %42
%44 = OpCompositeConstruct %7 %37 %39 %41 %43
OpStore %35 %44
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, 17));
EXPECT_TRUE(analysis->Dominates(5, 18));
EXPECT_TRUE(analysis->Dominates(5, 19));
EXPECT_TRUE(analysis->Dominates(5, 20));
EXPECT_TRUE(analysis->Dominates(5, 21));
EXPECT_TRUE(analysis->Dominates(5, 22));
EXPECT_TRUE(analysis->Dominates(5, 23));
EXPECT_TRUE(analysis->StrictlyDominates(5, 17));
EXPECT_TRUE(analysis->StrictlyDominates(5, 18));
EXPECT_TRUE(analysis->StrictlyDominates(5, 19));
EXPECT_TRUE(analysis->StrictlyDominates(5, 20));
EXPECT_TRUE(analysis->StrictlyDominates(5, 21));
EXPECT_TRUE(analysis->StrictlyDominates(5, 22));
EXPECT_TRUE(analysis->StrictlyDominates(5, 23));
}
} // namespace
} // namespace opt
} // namespace spvtools
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