[wasm] Int64Lowering of I64Shl on ia32.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index 3b6f21b151852a99cdab6f5fc53e6e5e194dae0b..a2c5bc8b7c4e8248e08b1ce428581482104a2f24 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -195,7 +195,8 @@ MachineRepresentation StackSlotRepresentationOf(Operator const* op) {
   V(Float64InsertHighWord32, Operator::kNoProperties, 2, 0, 1)                \
   V(LoadStackPointer, Operator::kNoProperties, 0, 0, 1)                       \
   V(LoadFramePointer, Operator::kNoProperties, 0, 0, 1)                       \
-  V(LoadParentFramePointer, Operator::kNoProperties, 0, 0, 1)
+  V(LoadParentFramePointer, Operator::kNoProperties, 0, 0, 1)                 \
+  V(Word32PairShl, Operator::kNoProperties, 3, 0, 2)
 
 #define PURE_OPTIONAL_OP_LIST(V)                            \
   V(Word32Ctz, Operator::kNoProperties, 1, 0, 1)            \