[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 179 matching lines @@
       // outputs of the Int32PairAdd will be accessed through projections.
       PrepareProjectionReplacements(node);
       break;
     }
     case IrOpcode::kInt64Sub: {
       // An Int64Sub node is changed into a Int32PairSub node. The two
       // outputs of the Int32PairSub will be accessed through projections.
       PrepareProjectionReplacements(node);
       break;
     }
+    case IrOpcode::kInt64Mul: {
+      // An Int64Sub node is changed into a Int32PairSub node. The two
+      // outputs of the Int32PairSub will be accessed through projections.
+      PrepareProjectionReplacements(node);
+      break;
+    }
     case IrOpcode::kWord64Or: {
       Node* low_node =
           graph()->NewNode(machine()->Word32Or(), placeholder_, placeholder_);
       Node* high_node =
           graph()->NewNode(machine()->Word32Or(), placeholder_, placeholder_);
       ReplaceNode(node, low_node, high_node);
       break;
     }
     case IrOpcode::kWord64Xor: {
       Node* low_node =
@@ skipping 274 matching lines @@
       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()->Int32PairSub());
       break;
     }
+    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());
+      break;
+    }
     case IrOpcode::kWord64Or: {
       DCHECK(node->InputCount() == 2);
       Node* left = node->InputAt(0);
       Node* right = node->InputAt(1);
 
       Node* low_node = GetReplacementLow(node);
       low_node->ReplaceInput(0, GetReplacementLow(left));
       low_node->ReplaceInput(1, GetReplacementLow(right));
 
       Node* high_node = GetReplacementHigh(node);
@@ skipping 350 matching lines @@
 }
 
 Node* Int64Lowering::GetReplacementHigh(Node* node) {
   Node* result = replacements_[node->id()].high;
   DCHECK(result);
   return result;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8