[wasm] Int64Lowering of I64Shl on ia32.

test/unittests/compiler/int64-lowering-unittest.cc

 // Copyright 2016 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/int64-lowering.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 
@@ skipping 338 matching lines @@
                               Int64Constant(value(1))),
              MachineRepresentation::kWord64);
   EXPECT_THAT(graph()->end()->InputAt(1),
               IsReturn2(IsWord32Xor(IsInt32Constant(low_word_value(0)),
                                     IsInt32Constant(low_word_value(1))),
                         IsWord32Xor(IsInt32Constant(high_word_value(0)),
                                     IsInt32Constant(high_word_value(1))),
                         start(), start()));
 }
 // kExprI64Shl:
+TEST_F(Int64LoweringTest, Int64Shl) {
+  if (4 != kPointerSize) return;
+
+  LowerGraph(graph()->NewNode(machine()->Word64Shl(), Int64Constant(value(0)),
+                              Int64Constant(value(1))),
+             MachineRepresentation::kWord64);
+
+  Capture<Node*> shl;
+  Matcher<Node*> shl_matcher = IsWord32PairShl(
+      IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
+      IsInt32Constant(low_word_value(1)));
+
+  EXPECT_THAT(graph()->end()->InputAt(1),
+              IsReturn2(IsProjection(0, AllOf(CaptureEq(&shl), shl_matcher)),
+                        IsProjection(1, AllOf(CaptureEq(&shl), shl_matcher)),
+                        start(), start()));
+}
 // kExprI64ShrU:
 // kExprI64ShrS:
 // kExprI64Eq:
 TEST_F(Int64LoweringTest, Int64Eq) {
   if (4 != kPointerSize) return;
 
   LowerGraph(graph()->NewNode(machine()->Word64Equal(), Int64Constant(value(0)),
                               Int64Constant(value(1))),
              MachineRepresentation::kWord32);
   EXPECT_THAT(
@@ skipping 48 matching lines @@
 // kExprF64SConvertI64:
 // kExprF64UConvertI64:
 // kExprI64SConvertF32:
 // kExprI64SConvertF64:
 // kExprI64UConvertF32:
 // kExprI64UConvertF64:
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8