[wasm] Int64Lowering of Int64Sub on ia32 and arm.

test/unittests/compiler/node-test-utils.h

 // 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.
 
 #ifndef V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_
 #define V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_
 
 #include "src/compiler/machine-operator.h"
 #include "src/machine-type.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 344 matching lines @@
                              const Matcher<Node*>& context_matcher);
 Matcher<Node*> IsNumberToInt32(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsNumberToUint32(const Matcher<Node*>& input_matcher);
 Matcher<Node*> IsParameter(const Matcher<int> index_matcher);
 Matcher<Node*> IsLoadFramePointer();
 
 Matcher<Node*> IsInt32PairAdd(const Matcher<Node*>& a_matcher,
                               const Matcher<Node*>& b_matcher,
                               const Matcher<Node*>& c_matcher,
                               const Matcher<Node*>& d_matcher);
+Matcher<Node*> IsInt32PairSub(const Matcher<Node*>& a_matcher,
+                              const Matcher<Node*>& b_matcher,
+                              const Matcher<Node*>& c_matcher,
+                              const Matcher<Node*>& d_matcher);
+
 Matcher<Node*> IsWord32PairShl(const Matcher<Node*>& lhs_matcher,
                                const Matcher<Node*>& mid_matcher,
                                const Matcher<Node*>& rhs_matcher);
 Matcher<Node*> IsWord32PairShr(const Matcher<Node*>& lhs_matcher,
                                const Matcher<Node*>& mid_matcher,
                                const Matcher<Node*>& rhs_matcher);
 
 Matcher<Node*> IsWord32PairSar(const Matcher<Node*>& lhs_matcher,
                                const Matcher<Node*>& mid_matcher,
                                const Matcher<Node*>& rhs_matcher);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_