[wasm] change reducer order in WASM pipeline to make build predictable again

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <memory>
 #include <sstream>
 
@@ skipping 675 matching lines @@
     PipelineRunScope scope(data, "WASM optimization");
     JSGraphReducer graph_reducer(data->jsgraph(), scope.zone());
     DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
                                               data->common());
     ValueNumberingReducer value_numbering(scope.zone(), data->graph()->zone());
     MachineOperatorReducer machine_reducer(data->jsgraph(),
                                            allow_signalling_nan_);
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
     AddReducer(data, &graph_reducer, &dead_code_elimination);
-    AddReducer(data, &graph_reducer, &value_numbering);
     AddReducer(data, &graph_reducer, &machine_reducer);
     AddReducer(data, &graph_reducer, &common_reducer);
+    AddReducer(data, &graph_reducer, &value_numbering);
     graph_reducer.ReduceGraph();
     pipeline_.RunPrintAndVerify("Optimized Machine", true);
   }
 
   if (!pipeline_.ScheduleAndSelectInstructions(&linkage_, true)) return FAILED;
   return SUCCEEDED;
 }
 
 PipelineWasmCompilationJob::Status
 PipelineWasmCompilationJob::FinalizeJobImpl() {
@@ skipping 1318 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8