add a RemoveUnusedModuleElements pass, and make LegalizeJSInterface create TempRet0 if needed (otherwise we might remove it before we use it)

1 files changed, 0 insertions, 65 deletions

diff --git a/src/passes/RemoveUnusedFunctions.cpp b/src/passes/RemoveUnusedFunctions.cpp
deleted file mode 100644
index ec9e271b7..000000000
--- a/src/passes/RemoveUnusedFunctions.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright 2016 WebAssembly Community Group participants
- *
- * 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.
- */
-
-//
-// Removes functions that are never used.
-//
-
-
-#include <memory>
-
-#include "wasm.h"
-#include "pass.h"
-#include "ast_utils.h"
-
-namespace wasm {
-
-struct RemoveUnusedFunctions : public Pass {
-  void run(PassRunner* runner, Module* module) override {
-    std::vector<Function*> root;
-    // Module start is a root.
-    if (module->start.is()) {
-      root.push_back(module->getFunction(module->start));
-    }
-    // Exports are roots.
-    for (auto& curr : module->exports) {
-      if (curr->kind == ExternalKind::Function) {
-        root.push_back(module->getFunction(curr->value));
-      }
-    }
-    // For now, all functions that can be called indirectly are marked as roots.
-    for (auto& segment : module->table.segments) {
-      for (auto& curr : segment.data) {
-        root.push_back(module->getFunction(curr));
-      }
-    }
-    // Compute function reachability starting from the root set.
-    DirectCallGraphAnalyzer analyzer(module, root);
-    // Remove unreachable functions.
-    auto& v = module->functions;
-    v.erase(std::remove_if(v.begin(), v.end(), [&](const std::unique_ptr<Function>& curr) {
-      return analyzer.reachable.count(curr.get()) == 0;
-    }), v.end());
-    assert(module->functions.size() == analyzer.reachable.size());
-    module->updateFunctionsMap();
-  }
-};
-
-Pass *createRemoveUnusedFunctionsPass() {
-  return new RemoveUnusedFunctions();
-}
-
-} // namespace wasm