[wasm] Added I64Xor to the Int64Lowering.

test/cctest/wasm/test-run-wasm-64.cc

Index: test/cctest/wasm/test-run-wasm-64.cc
diff --git a/test/cctest/wasm/test-run-wasm-64.cc b/test/cctest/wasm/test-run-wasm-64.cc
index 3dc5a3a3733f8ad12e17e369c4e777c5f58d2796..2a1cfe2d9b33b11de1fba0805aa696248d2b2cef 100644
--- a/test/cctest/wasm/test-run-wasm-64.cc
+++ b/test/cctest/wasm/test-run-wasm-64.cc
@@ -43,6 +43,13 @@ TEST(Run_WasmI64Ior) {
   }
 }
 // kExprI64Xor:
+TEST(Run_WasmI64Xor) {
+  WasmRunner<int64_t> r(MachineType::Int64(), MachineType::Int64());
+  BUILD(r, WASM_I64_XOR(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+  FOR_INT64_INPUTS(i) {
+    FOR_INT64_INPUTS(j) { CHECK_EQ((*i) ^ (*j), r.Call(*i, *j)); }
+  }
+}
 // kExprI64Shl:
 // kExprI64ShrU:
 // kExprI64ShrS: