[wasm] Int64Lowering of Int64Sub on ia32 and arm.

test/cctest/wasm/test-run-wasm-64.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 <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/wasm/wasm-macro-gen.h"
 
@@ skipping 10 matching lines @@
 // easier when I do them one by one.
 // kExprI64Add:
 TEST(Run_WasmI64Add) {
   WasmRunner<int64_t> r(MachineType::Int64(), MachineType::Int64());
   BUILD(r, WASM_I64_ADD(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
   FOR_INT64_INPUTS(i) {
     FOR_INT64_INPUTS(j) { CHECK_EQ(*i + *j, r.Call(*i, *j)); }
   }
 }
 // kExprI64Sub:
+TEST(Run_WasmI64Sub) {
+  WasmRunner<int64_t> r(MachineType::Int64(), MachineType::Int64());
+  BUILD(r, WASM_I64_SUB(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+  FOR_INT64_INPUTS(i) {
+    FOR_INT64_INPUTS(j) { CHECK_EQ(*i - *j, r.Call(*i, *j)); }
+  }
+}
 // kExprI64Mul:
 // kExprI64DivS:
 // kExprI64DivU:
 // kExprI64RemS:
 // kExprI64RemU:
 // kExprI64And:
 TEST(Run_WasmI64And) {
   WasmRunner<int64_t> r(MachineType::Int64(), MachineType::Int64());
   BUILD(r, WASM_I64_AND(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
   FOR_INT64_INPUTS(i) {
@@ skipping 442 matching lines @@
             WASM_I64V_10(0xbcd1234000000013), WASM_I64V_10(0xbcd1234000000014),
             WASM_I64V_10(0xbcd1234000000015), WASM_I64V_10(0xbcd1234000000016),
             WASM_I64V_10(0xbcd1234000000017), WASM_I64V_10(0xbcd1234000000018),
             WASM_I64V_10(0xbcd1234000000019), WASM_I64V_10(0xbcd123400000001a),
             WASM_I64V_10(0xbcd123400000001b), WASM_I64V_10(0xbcd123400000001c),
             WASM_I64V_10(0xbcd123400000001d))));
 
     CHECK_EQ(i + 0xb, r.Call());
   }
 }