[wasm] Int64Lowering of Int64Mul on ia32 and arm.

src/compiler/int64-lowering.cc

 // 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.
 
 #include "src/compiler/int64-lowering.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 285 matching lines @@
       node->InsertInput(zone(), 1, GetReplacementHigh(left));
 
       NodeProperties::ChangeOp(node, machine()->Int32PairSub());
       // We access the additional return values through projections.
       Node* low_node = graph()->NewNode(common()->Projection(0), node);
       Node* high_node = graph()->NewNode(common()->Projection(1), node);
       ReplaceNode(node, low_node, high_node);
       break;
     }
     // kExprI64Mul:
+    case IrOpcode::kInt64Mul: {
+      DCHECK(node->InputCount() == 2);
+
+      Node* right = node->InputAt(1);
+      node->ReplaceInput(1, GetReplacementLow(right));
+      node->AppendInput(zone(), GetReplacementHigh(right));
+
+      Node* left = node->InputAt(0);
+      node->ReplaceInput(0, GetReplacementLow(left));
+      node->InsertInput(zone(), 1, GetReplacementHigh(left));
+
+      NodeProperties::ChangeOp(node, machine()->Int32PairMul());
+      // We access the additional return values through projections.
+      Node* low_node = graph()->NewNode(common()->Projection(0), node);
+      Node* high_node = graph()->NewNode(common()->Projection(1), node);
+      ReplaceNode(node, low_node, high_node);
+      break;
+    }
     // kExprI64DivS:
     // kExprI64DivU:
     // kExprI64RemS:
     // kExprI64RemU:
     // kExprI64Ior:
     case IrOpcode::kWord64Or: {
       DCHECK(node->InputCount() == 2);
       Node* left = node->InputAt(0);
       Node* right = node->InputAt(1);
 
@@ skipping 375 matching lines @@
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_low, false),
                 graph()->NewNode(
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_high, false));
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8