[wasm] Int64Lowering of Int64Add on ia32 and arm.

src/compiler/wasm-compiler.cc

 // Copyright 2015 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/wasm-compiler.h"
 
 #include "src/isolate-inl.h"
 
 #include "src/base/platform/platform.h"
 
@@ skipping 475 matching lines @@
     case wasm::kExprI32GeU:
       op = m->Uint32LessThanOrEqual();
       std::swap(left, right);
       break;
     case wasm::kExprI64And:
       op = m->Word64And();
       break;
     // todo(ahaas): I added a list of missing instructions here to make merging
     // easier when I do them one by one.
     // kExprI64Add:
+    case wasm::kExprI64Add:
+      op = m->Int64Add();
+      break;
     // kExprI64Sub:
     // kExprI64Mul:
     // kExprI64DivS:
     // kExprI64DivU:
     // kExprI64RemS:
     // kExprI64RemU:
     case wasm::kExprI64Ior:
       op = m->Word64Or();
       break;
 // kExprI64Xor:
@@ skipping 45 matching lines @@
       std::swap(left, right);
       break;
     case wasm::kExprI64GeU:
       op = m->Uint64LessThanOrEqual();
       std::swap(left, right);
       break;
 
 #if WASM_64
     // Opcodes only supported on 64-bit platforms.
     // TODO(titzer): query the machine operator builder here instead of #ifdef.
-    case wasm::kExprI64Add:
-      op = m->Int64Add();
-      break;
     case wasm::kExprI64Sub:
       op = m->Int64Sub();
       break;
     case wasm::kExprI64Mul:
       op = m->Int64Mul();
       break;
     case wasm::kExprI64DivS: {
       trap_->ZeroCheck64(kTrapDivByZero, right);
       Node* before = *control_;
       Node* denom_is_m1;
@@ skipping 1905 matching lines @@
                                   function.name_offset, function.name_length));
   }
 
   return code;
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8