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available_instructions_test.cpp
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// Copyright (c) 2021 Alastair F. Donaldson
//
// 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 "source/fuzz/available_instructions.h"
#include "gtest/gtest.h"
#include "source/fuzz/fuzzer_util.h"
#include "test/fuzz/fuzz_test_util.h"
namespace spvtools {
namespace fuzz {
namespace {
TEST(AvailableInstructionsTest, BasicTest) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 320
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%8 = OpTypeFloat 32
%9 = OpTypePointer Function %8
%10 = OpTypeFunction %6 %7 %9
%15 = OpTypeVector %8 2
%16 = OpTypePointer Private %15
%17 = OpVariable %16 Private
%18 = OpConstant %8 1
%19 = OpConstant %8 2
%20 = OpConstantComposite %15 %18 %19
%21 = OpTypeVector %8 4
%22 = OpTypePointer Private %21
%23 = OpVariable %22 Private
%24 = OpConstant %8 10
%25 = OpConstant %8 20
%26 = OpConstant %8 30
%27 = OpConstant %8 40
%28 = OpConstantComposite %21 %24 %25 %26 %27
%31 = OpTypeInt 32 0
%32 = OpConstant %31 0
%33 = OpTypePointer Private %8
%41 = OpTypeBool
%46 = OpConstant %6 1
%54 = OpConstant %6 10
%57 = OpConstant %31 3
%61 = OpConstant %6 0
%66 = OpConstant %6 3
%4 = OpFunction %2 None %3
%5 = OpLabel
%55 = OpVariable %7 Function
%56 = OpVariable %9 Function
%65 = OpVariable %7 Function
%68 = OpVariable %7 Function
OpStore %17 %20
OpStore %23 %28
OpStore %55 %54
%58 = OpAccessChain %33 %23 %57
%59 = OpLoad %8 %58
OpStore %56 %59
%60 = OpFunctionCall %6 %13 %55 %56
%100 = OpCopyObject %21 %28
%62 = OpSGreaterThan %41 %60 %61
OpSelectionMerge %64 None
OpBranchConditional %62 %63 %67
%63 = OpLabel
OpStore %65 %66
%101 = OpCopyObject %21 %28
OpBranch %64
%67 = OpLabel
OpStore %68 %61
OpBranch %69
%69 = OpLabel
OpLoopMerge %71 %72 None
OpBranch %73
%73 = OpLabel
%74 = OpLoad %6 %68
%75 = OpSLessThan %41 %74 %54
OpBranchConditional %75 %70 %71
%70 = OpLabel
%76 = OpLoad %6 %65
%77 = OpIAdd %6 %76 %46
OpStore %65 %77
OpBranch %72
%72 = OpLabel
%78 = OpLoad %6 %68
%79 = OpIAdd %6 %78 %46
OpStore %68 %79
OpBranch %69
%71 = OpLabel
%102 = OpCopyObject %21 %28
OpBranch %64
%64 = OpLabel
OpReturn
OpFunctionEnd
%13 = OpFunction %6 None %10
%11 = OpFunctionParameter %7
%12 = OpFunctionParameter %9
%14 = OpLabel
%29 = OpVariable %7 Function
%30 = OpLoad %6 %11
%34 = OpAccessChain %33 %17 %32
%35 = OpLoad %8 %34
%36 = OpConvertFToS %6 %35
%37 = OpIAdd %6 %30 %36
OpStore %29 %37
%38 = OpLoad %6 %11
%39 = OpLoad %8 %12
%40 = OpConvertFToS %6 %39
%42 = OpSLessThan %41 %38 %40
%103 = OpCopyObject %21 %28
OpSelectionMerge %44 None
OpBranchConditional %42 %43 %48
%43 = OpLabel
%45 = OpLoad %6 %29
%47 = OpIAdd %6 %45 %46
OpStore %29 %47
OpBranch %44
%48 = OpLabel
%49 = OpLoad %6 %29
%50 = OpISub %6 %49 %46
OpStore %29 %50
OpBranch %44
%44 = OpLabel
%51 = OpLoad %6 %29
OpReturnValue %51
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
opt::Instruction* i1 = context->get_def_use_mgr()->GetDef(55);
opt::Instruction* i2 = context->get_def_use_mgr()->GetDef(101);
opt::Instruction* i3 = &*context->cfg()->block(67)->begin();
opt::Instruction* i4 = context->get_def_use_mgr()->GetDef(74);
opt::Instruction* i5 = context->get_def_use_mgr()->GetDef(102);
opt::Instruction* i6 = context->get_def_use_mgr()->GetDef(30);
opt::Instruction* i7 = context->get_def_use_mgr()->GetDef(47);
opt::Instruction* i8 = context->get_def_use_mgr()->GetDef(50);
opt::Instruction* i9 = context->get_def_use_mgr()->GetDef(51);
{
AvailableInstructions no_instructions(
context.get(),
[](opt::IRContext*, opt::Instruction*) -> bool { return false; });
for (auto i : {i1, i2, i3, i4, i5, i6, i7, i8, i9}) {
auto available = no_instructions.GetAvailableBeforeInstruction(i);
ASSERT_EQ(0, available.size());
ASSERT_TRUE(available.empty());
}
}
{
AvailableInstructions all_instructions(
context.get(),
[](opt::IRContext*, opt::Instruction*) -> bool { return true; });
{
auto available = all_instructions.GetAvailableBeforeInstruction(i1);
ASSERT_FALSE(available.empty());
ASSERT_EQ(30, available.size());
ASSERT_EQ(spv::Op::OpTypeVoid, available[0]->opcode());
ASSERT_EQ(spv::Op::OpVariable, available[15]->opcode());
}
{
auto available = all_instructions.GetAvailableBeforeInstruction(i2);
ASSERT_FALSE(available.empty());
ASSERT_EQ(46, available.size());
ASSERT_EQ(spv::Op::OpTypeVoid, available[0]->opcode());
ASSERT_EQ(spv::Op::OpTypePointer, available[3]->opcode());
ASSERT_EQ(spv::Op::OpVariable, available[15]->opcode());
ASSERT_EQ(spv::Op::OpFunctionCall, available[40]->opcode());
ASSERT_EQ(spv::Op::OpStore, available[45]->opcode());
}
{
auto available = all_instructions.GetAvailableBeforeInstruction(i3);
ASSERT_FALSE(available.empty());
ASSERT_EQ(45, available.size());
ASSERT_EQ(spv::Op::OpTypeVoid, available[0]->opcode());
ASSERT_EQ(spv::Op::OpTypePointer, available[3]->opcode());
ASSERT_EQ(spv::Op::OpVariable, available[15]->opcode());
ASSERT_EQ(spv::Op::OpFunctionCall, available[40]->opcode());
ASSERT_EQ(spv::Op::OpBranchConditional, available[44]->opcode());
}
{
auto available = all_instructions.GetAvailableBeforeInstruction(i6);
ASSERT_FALSE(available.empty());
ASSERT_EQ(33, available.size());
ASSERT_EQ(spv::Op::OpTypeVoid, available[0]->opcode());
ASSERT_EQ(spv::Op::OpTypeFloat, available[4]->opcode());
ASSERT_EQ(spv::Op::OpTypePointer, available[8]->opcode());
ASSERT_EQ(spv::Op::OpConstantComposite, available[12]->opcode());
ASSERT_EQ(spv::Op::OpConstant, available[16]->opcode());
ASSERT_EQ(spv::Op::OpFunctionParameter, available[30]->opcode());
ASSERT_EQ(spv::Op::OpFunctionParameter, available[31]->opcode());
ASSERT_EQ(spv::Op::OpVariable, available[32]->opcode());
}
}
{
AvailableInstructions vector_instructions(
context.get(),
[](opt::IRContext* ir_context, opt::Instruction* inst) -> bool {
return inst->type_id() != 0 && ir_context->get_type_mgr()
->GetType(inst->type_id())
->AsVector() != nullptr;
});
{
auto available = vector_instructions.GetAvailableBeforeInstruction(i4);
ASSERT_FALSE(available.empty());
ASSERT_EQ(3, available.size());
ASSERT_EQ(spv::Op::OpConstantComposite, available[0]->opcode());
ASSERT_EQ(spv::Op::OpConstantComposite, available[1]->opcode());
ASSERT_EQ(spv::Op::OpCopyObject, available[2]->opcode());
}
{
auto available = vector_instructions.GetAvailableBeforeInstruction(i5);
ASSERT_FALSE(available.empty());
ASSERT_EQ(3, available.size());
ASSERT_EQ(spv::Op::OpConstantComposite, available[0]->opcode());
ASSERT_EQ(spv::Op::OpConstantComposite, available[1]->opcode());
ASSERT_EQ(spv::Op::OpCopyObject, available[2]->opcode());
}
{
auto available = vector_instructions.GetAvailableBeforeInstruction(i6);
ASSERT_FALSE(available.empty());
ASSERT_EQ(2, available.size());
ASSERT_EQ(spv::Op::OpConstantComposite, available[0]->opcode());
ASSERT_EQ(spv::Op::OpConstantComposite, available[1]->opcode());
}
}
{
AvailableInstructions integer_add_instructions(
context.get(), [](opt::IRContext*, opt::Instruction* inst) -> bool {
return inst->opcode() == spv::Op::OpIAdd;
});
{
auto available =
integer_add_instructions.GetAvailableBeforeInstruction(i7);
ASSERT_FALSE(available.empty());
ASSERT_EQ(1, available.size());
ASSERT_EQ(spv::Op::OpIAdd, available[0]->opcode());
}
{
auto available =
integer_add_instructions.GetAvailableBeforeInstruction(i8);
ASSERT_FALSE(available.empty());
ASSERT_EQ(1, available.size());
ASSERT_EQ(spv::Op::OpIAdd, available[0]->opcode());
}
{
auto available =
integer_add_instructions.GetAvailableBeforeInstruction(i9);
ASSERT_FALSE(available.empty());
ASSERT_EQ(1, available.size());
ASSERT_EQ(spv::Op::OpIAdd, available[0]->opcode());
}
}
}
TEST(AvailableInstructionsTest, UnreachableBlock) {
std::string shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main"
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 320
OpName %4 "main"
OpName %8 "x"
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeInt 32 1
%7 = OpTypePointer Function %6
%9 = OpConstant %6 2
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
OpStore %8 %9
%12 = OpLoad %6 %8
OpReturn
%10 = OpLabel
%11 = OpLoad %6 %8
OpReturn
OpFunctionEnd
)";
const auto env = SPV_ENV_UNIVERSAL_1_3;
const auto consumer = nullptr;
const auto context = BuildModule(env, consumer, shader, kFuzzAssembleOption);
spvtools::ValidatorOptions validator_options;
ASSERT_TRUE(fuzzerutil::IsValidAndWellFormed(context.get(), validator_options,
kConsoleMessageConsumer));
AvailableInstructions all_instructions(
context.get(),
[](opt::IRContext*, opt::Instruction*) -> bool { return true; });
ASSERT_EQ(7, all_instructions
.GetAvailableBeforeInstruction(
context->get_def_use_mgr()->GetDef(12))
.size());
#ifndef NDEBUG
ASSERT_DEATH(all_instructions.GetAvailableBeforeInstruction(
context->get_def_use_mgr()->GetDef(11)),
"Availability can only be queried for reachable instructions.");
#endif
}
} // namespace
} // namespace fuzz
} // namespace spvtools