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// Copyright 2021 The Tint Authors.
//
// 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 "src/tint/fuzzers/tint_ast_fuzzer/mutation_finders/delete_statements.h"
#include <memory>
#include "src/tint/fuzzers/tint_ast_fuzzer/jump_tracker.h"
#include "src/tint/fuzzers/tint_ast_fuzzer/mutations/delete_statement.h"
#include "src/tint/fuzzers/tint_ast_fuzzer/util.h"
#include "src/tint/lang/wgsl/sem/statement.h"
#include "src/tint/lang/wgsl/sem/value_expression.h"
#include "src/tint/lang/wgsl/sem/variable.h"
namespace tint::fuzzers::ast_fuzzer {
MutationList MutationFinderDeleteStatements::FindMutations(const tint::Program& program,
NodeIdMap* node_id_map,
ProbabilityContext* /*unused*/) const {
MutationList result;
JumpTracker jump_tracker(program);
// Consider every statement node in the AST.
for (auto* node : program.ASTNodes().Objects()) {
auto* statement_node = tint::As<ast::Statement>(node);
if (!statement_node) {
continue;
}
const auto* statement_sem_node =
tint::As<sem::Statement>(program.Sem().Get(statement_node));
// Semantic information for the node is required in order to delete it.
if (!statement_sem_node) {
continue;
}
// Check that this kind of statement can be deleted.
if (!MutationDeleteStatement::CanBeDeleted(*statement_node, program, jump_tracker)) {
continue;
}
result.push_back(
std::make_unique<MutationDeleteStatement>(node_id_map->GetId(statement_node)));
}
return result;
}
uint32_t MutationFinderDeleteStatements::GetChanceOfApplyingMutation(
ProbabilityContext* probability_context) const {
return probability_context->GetChanceOfDeletingStatements();
}
} // namespace tint::fuzzers::ast_fuzzer