[turbofan] Pull ResizeMergeOrPhi into CommonOperatorBuilder and use in ControlReducer.

src/compiler/common-operator.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/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 474 matching lines @@
 
 
 const Operator* CommonOperatorBuilder::Projection(size_t index) {
   return new (zone()) Operator1<size_t>(       // --
       IrOpcode::kProjection, Operator::kPure,  // opcode
       "Projection",                            // name
       1, 0, 0, 1, 0, 0,                        // counts
       index);                                  // parameter
 }
 
+
+const Operator* CommonOperatorBuilder::ResizeMergeOrPhi(const Operator* op,
+                                                        int size) {
+  if (op->opcode() == IrOpcode::kPhi) {
+    return Phi(OpParameter<MachineType>(op), size);
+  } else if (op->opcode() == IrOpcode::kEffectPhi) {
+    return EffectPhi(size);
+  } else if (op->opcode() == IrOpcode::kMerge) {
+    return Merge(size);
+  } else if (op->opcode() == IrOpcode::kLoop) {
+    return Loop(size);
+  } else {
+    UNREACHABLE();
+    return nullptr;
+  }
+}
+
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8