remove lower-if-else, as it's no longer needed

3 files changed, 0 insertions, 69 deletions

diff --git a/src/passes/CMakeLists.txt b/src/passes/CMakeLists.txt
index 0baee7c3a..1b4c65562 100644
--- a/src/passes/CMakeLists.txt
+++ b/src/passes/CMakeLists.txt
@@ -3,7 +3,6 @@ SET(passes_SOURCES
   CoalesceLocals.cpp
   DeadCodeElimination.cpp
   DuplicateFunctionElimination.cpp
-  LowerIfElse.cpp
   MergeBlocks.cpp
   Metrics.cpp
   NameManager.cpp
diff --git a/src/passes/LowerIfElse.cpp b/src/passes/LowerIfElse.cpp
deleted file mode 100644
index b566e8207..000000000
--- a/src/passes/LowerIfElse.cpp
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright 2015 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.
- */
-
-//
-// Lowers if (x) y else z into
-//
-// L: {
-//   if (x) break (y) L
-//   z
-// }
-//
-// This is useful for investigating how beneficial if_else is.
-//
-
-#include <memory>
-
-#include <wasm.h>
-#include <pass.h>
-
-namespace wasm {
-
-struct LowerIfElse : public WalkerPass<PostWalker<LowerIfElse, Visitor<LowerIfElse>>> {
-  MixedArena* allocator;
-  std::unique_ptr<NameManager> namer;
-
-  void prepare(PassRunner* runner, Module *module) override {
-    allocator = runner->allocator;
-    namer = make_unique<NameManager>();
-    namer->run(runner, module);
-  }
-
-  void visitIf(If *curr) {
-    if (curr->ifFalse) {
-      auto block = allocator->alloc<Block>();
-      auto name = namer->getUnique("L"); // TODO: getUniqueInFunction
-      block->name = name;
-      block->list.push_back(curr);
-      block->list.push_back(curr->ifFalse);
-      block->finalize();
-      curr->ifFalse = nullptr;
-      auto break_ = allocator->alloc<Break>();
-      break_->name = name;
-      break_->value = curr->ifTrue;
-      curr->ifTrue = break_;
-      replaceCurrent(block);
-    }
-  }
-};
-
-Pass *createLowerIfElsePass() {
-  return new LowerIfElse();
-}
-
-} // namespace wasm
diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index cd7e21542..1e7e85ccb 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -65,7 +65,6 @@ void PassRegistry::registerPasses() {
   registerPass("coalesce-locals-learning", "reduce # of locals by coalescing and learning", createCoalesceLocalsWithLearningPass);
   registerPass("dce", "removes unreachable code", createDeadCodeEliminationPass);
   registerPass("duplicate-function-elimination", "removes duplicate functions", createDuplicateFunctionEliminationPass);
-  registerPass("lower-if-else", "lowers if-elses into ifs, blocks and branches", createLowerIfElsePass);
   registerPass("merge-blocks", "merges blocks to their parents", createMergeBlocksPass);
   registerPass("metrics", "reports metrics", createMetricsPass);
   registerPass("nm", "name list", createNameListPass);