mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-28 10:41:04 +00:00
8013d477ae
This adds a new kind of fact to the fact manager that knows whether a
block is dead - i.e. guaranteed to be statically unreachable - and a
new transformation for adding a selection construct to a CFG that
conditionally branches to a fresh, dead block, such that the branch
will never be dynamically taken. Transformations that may create new
blocks ('split block' and 'outline function') are updated to propagate
dead block facts to newly-created blocks where appropriate. A fuzzer
pass randomly adds dead blocks to the module.
Future transformations will be able to exploit the fact that such
blocks are known to be dead.
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "test/fuzz/fuzz_test_util.h"
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#include <fstream>
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#include <iostream>
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#include "tools/io.h"
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namespace spvtools {
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namespace fuzz {
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bool IsEqual(const spv_target_env env,
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const std::vector<uint32_t>& expected_binary,
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const std::vector<uint32_t>& actual_binary) {
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if (expected_binary == actual_binary) {
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return true;
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}
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SpirvTools t(env);
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std::string expected_disassembled;
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std::string actual_disassembled;
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if (!t.Disassemble(expected_binary, &expected_disassembled,
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kFuzzDisassembleOption)) {
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return false;
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}
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if (!t.Disassemble(actual_binary, &actual_disassembled,
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kFuzzDisassembleOption)) {
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return false;
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}
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// Using expect gives us a string diff if the strings are not the same.
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EXPECT_EQ(expected_disassembled, actual_disassembled);
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// We then return the result of the equality comparison, to be used by an
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// assertion in the test root function.
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return expected_disassembled == actual_disassembled;
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}
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bool IsEqual(const spv_target_env env, const std::string& expected_text,
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const std::vector<uint32_t>& actual_binary) {
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std::vector<uint32_t> expected_binary;
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SpirvTools t(env);
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if (!t.Assemble(expected_text, &expected_binary, kFuzzAssembleOption)) {
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return false;
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}
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return IsEqual(env, expected_binary, actual_binary);
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}
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bool IsEqual(const spv_target_env env, const std::string& expected_text,
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const opt::IRContext* actual_ir) {
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std::vector<uint32_t> actual_binary;
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actual_ir->module()->ToBinary(&actual_binary, false);
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return IsEqual(env, expected_text, actual_binary);
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}
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bool IsEqual(const spv_target_env env, const opt::IRContext* ir_1,
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const opt::IRContext* ir_2) {
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std::vector<uint32_t> binary_1;
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ir_1->module()->ToBinary(&binary_1, false);
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std::vector<uint32_t> binary_2;
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ir_2->module()->ToBinary(&binary_2, false);
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return IsEqual(env, binary_1, binary_2);
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}
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bool IsValid(spv_target_env env, const opt::IRContext* ir) {
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std::vector<uint32_t> binary;
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ir->module()->ToBinary(&binary, false);
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SpirvTools t(env);
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t.SetMessageConsumer(kConsoleMessageConsumer);
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return t.Validate(binary);
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}
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std::string ToString(spv_target_env env, const opt::IRContext* ir) {
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std::vector<uint32_t> binary;
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ir->module()->ToBinary(&binary, false);
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return ToString(env, binary);
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}
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std::string ToString(spv_target_env env, const std::vector<uint32_t>& binary) {
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SpirvTools t(env);
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std::string result;
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t.Disassemble(binary, &result, kFuzzDisassembleOption);
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return result;
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}
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void DumpShader(opt::IRContext* context, const char* filename) {
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std::vector<uint32_t> binary;
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context->module()->ToBinary(&binary, false);
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DumpShader(binary, filename);
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}
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void DumpShader(const std::vector<uint32_t>& binary, const char* filename) {
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auto write_file_succeeded =
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WriteFile(filename, "wb", &binary[0], binary.size());
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if (!write_file_succeeded) {
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std::cerr << "Failed to dump shader" << std::endl;
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}
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}
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void DumpTransformationsJson(
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const protobufs::TransformationSequence& transformations,
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const char* filename) {
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std::string json_string;
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auto json_options = google::protobuf::util::JsonOptions();
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json_options.add_whitespace = true;
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auto json_generation_status = google::protobuf::util::MessageToJsonString(
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transformations, &json_string, json_options);
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if (json_generation_status == google::protobuf::util::Status::OK) {
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std::ofstream transformations_json_file(filename);
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transformations_json_file << json_string;
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transformations_json_file.close();
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}
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}
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} // namespace fuzz
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} // namespace spvtools
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