Revert of [wasm] Master CL for Binary 0xC changes.

src/compiler/int64-lowering.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/int64-lowering.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 760 matching lines @@
         Node* high_node = GetReplacementHigh(node);
         for (int i = 0; i < node->op()->ValueInputCount(); i++) {
           low_node->ReplaceInput(i, GetReplacementLow(node->InputAt(i)));
           high_node->ReplaceInput(i, GetReplacementHigh(node->InputAt(i)));
         }
       } else {
         DefaultLowering(node);
       }
       break;
     }
-    case IrOpcode::kProjection: {
-      Node* call = node->InputAt(0);
-      DCHECK_EQ(IrOpcode::kCall, call->opcode());
-      CallDescriptor* descriptor =
-          const_cast<CallDescriptor*>(CallDescriptorOf(call->op()));
-      for (size_t i = 0; i < descriptor->ReturnCount(); i++) {
-        if (descriptor->GetReturnType(i) == MachineType::Int64()) {
-          UNREACHABLE();  // TODO(titzer): implement multiple i64 returns.
-        }
-      }
-      break;
-    }
     case IrOpcode::kWord64ReverseBytes: {
       Node* input = node->InputAt(0);
       ReplaceNode(node, graph()->NewNode(machine()->Word32ReverseBytes().op(),
                                          GetReplacementHigh(input)),
                   graph()->NewNode(machine()->Word32ReverseBytes().op(),
                                    GetReplacementLow(input)));
       break;
     }
 
     default: { DefaultLowering(node); }
@@ skipping 83 matching lines @@
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_low, false),
                 graph()->NewNode(
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_high, false));
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8