[wasm] Int64Lowering of Int64Add on ia32 and arm.

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 82c323390a7143caa5a1386cc2ee38cbd18f4349..8fbc5da927654861e5fe932a22d58ee7c3b48c98 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -324,6 +324,9 @@ class RawMachineAssembler {
   Node* Uint64Mod(Node* a, Node* b) {
     return AddNode(machine()->Uint64Mod(), a, b);
   }
+  Node* Int32AddPair(Node* a_low, Node* a_high, Node* b_low, Node* b_high) {
+    return AddNode(machine()->Int32AddPair(), a_low, a_high, b_low, b_high);
+  }
   Node* Word32PairShl(Node* low_word, Node* high_word, Node* shift) {
     return AddNode(machine()->Word32PairShl(), low_word, high_word, shift);
   }