[wasm] Int64Lowering of I64Shl on ia32.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index fcbc94e0e8ee69082334761f82e3058f95b32d6f..a3d13a618a619b528a5ba5ebcc537aa0d1c0ea0b 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -1150,6 +1150,10 @@ void InstructionSelector::VisitNode(Node* node) {
     }
     case IrOpcode::kCheckedStore:
       return VisitCheckedStore(node);
+    case IrOpcode::kWord32PairShl:
+      MarkAsWord32(NodeProperties::FindProjection(node, 0));
+      MarkAsWord32(NodeProperties::FindProjection(node, 1));
+      return VisitWord32PairShl(node);
     default:
       V8_Fatal(__FILE__, __LINE__, "Unexpected operator #%d:%s @ node #%d",
                node->opcode(), node->op()->mnemonic(), node->id());
@@ -1373,6 +1377,10 @@ void InstructionSelector::VisitBitcastInt64ToFloat64(Node* node) {
 
 #endif  // V8_TARGET_ARCH_32_BIT
 
+// 32 bit targets do not implement the following instructions.
+#if V8_TARGET_ARCH_64_BIT
+void InstructionSelector::VisitWord32PairShl(Node* node) { UNIMPLEMENTED(); }
+#endif  // V8_TARGET_ARCH_64_BIT
 
 void InstructionSelector::VisitFinishRegion(Node* node) {
   OperandGenerator g(this);
@@ -1451,6 +1459,7 @@ void InstructionSelector::VisitProjection(Node* node) {
     case IrOpcode::kTryTruncateFloat64ToInt64:
     case IrOpcode::kTryTruncateFloat32ToUint64:
     case IrOpcode::kTryTruncateFloat64ToUint64:
+    case IrOpcode::kWord32PairShl:
       if (ProjectionIndexOf(node->op()) == 0u) {
         Emit(kArchNop, g.DefineSameAsFirst(node), g.Use(value));
       } else {