mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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82663f34c9
Merge return assumes that the only unreachable blocks are those needed to keep the structured cfg valid. Even those must be essentially empty blocks. If this is not the case, we get unpredictable behaviour. This commit add a check in merge return, and emits an error if it is not the case. Added a pass of dead branch elimination before merge return in both the performance and size passes. It is a precondition of merge return. Fixes #1962.
103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
// Copyright (c) 2016 Google Inc.
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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/opt/pass_utils.h"
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#include <algorithm>
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#include <sstream>
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namespace spvtools {
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namespace opt {
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namespace {
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// Well, this is another place requiring the knowledge of the grammar and can be
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// stale when SPIR-V is updated. It would be nice to automatically generate
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// this, but the cost is just too high.
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const char* kDebugOpcodes[] = {
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// clang-format off
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"OpSourceContinued", "OpSource", "OpSourceExtension",
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"OpName", "OpMemberName", "OpString",
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"OpLine", "OpNoLine", "OpModuleProcessed"
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// clang-format on
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};
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} // anonymous namespace
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MessageConsumer GetTestMessageConsumer(
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std::vector<Message>& expected_messages) {
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return [&expected_messages](spv_message_level_t level, const char* source,
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const spv_position_t& position,
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const char* message) {
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EXPECT_TRUE(!expected_messages.empty());
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if (expected_messages.empty()) {
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return;
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}
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EXPECT_EQ(expected_messages[0].level, level);
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EXPECT_EQ(expected_messages[0].line_number, position.line);
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EXPECT_EQ(expected_messages[0].column_number, position.column);
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EXPECT_STREQ(expected_messages[0].source_file, source);
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EXPECT_STREQ(expected_messages[0].message, message);
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expected_messages.erase(expected_messages.begin());
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};
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}
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bool FindAndReplace(std::string* process_str, const std::string find_str,
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const std::string replace_str) {
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if (process_str->empty() || find_str.empty()) {
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return false;
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}
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bool replaced = false;
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// Note this algorithm has quadratic time complexity. It is OK for test cases
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// with short strings, but might not fit in other contexts.
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for (size_t pos = process_str->find(find_str, 0); pos != std::string::npos;
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pos = process_str->find(find_str, pos)) {
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process_str->replace(pos, find_str.length(), replace_str);
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pos += replace_str.length();
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replaced = true;
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}
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return replaced;
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}
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bool ContainsDebugOpcode(const char* inst) {
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return std::any_of(std::begin(kDebugOpcodes), std::end(kDebugOpcodes),
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[inst](const char* op) {
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return std::string(inst).find(op) != std::string::npos;
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});
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}
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std::string SelectiveJoin(const std::vector<const char*>& strings,
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const std::function<bool(const char*)>& skip_dictator,
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char delimiter) {
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std::ostringstream oss;
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for (const auto* str : strings) {
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if (!skip_dictator(str)) oss << str << delimiter;
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}
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return oss.str();
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}
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std::string JoinAllInsts(const std::vector<const char*>& insts) {
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return SelectiveJoin(insts, [](const char*) { return false; });
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}
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std::string JoinNonDebugInsts(const std::vector<const char*>& insts) {
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return SelectiveJoin(
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insts, [](const char* inst) { return ContainsDebugOpcode(inst); });
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}
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} // namespace opt
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} // namespace spvtools
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