WIP: wasm oob trap handling experiments

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 5d0e677f8d5ec99b325c1799b418eb5b05e6f62d..b7a6a2107298d4f7655257211307935d56c62892 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -41,6 +41,7 @@ class OptionalOperator final {
 
 // A Load needs a MachineType.
 typedef MachineType LoadRepresentation;
+typedef MachineType TrapableLoadRepresentation;
 
 LoadRepresentation LoadRepresentationOf(Operator const*);
 
@@ -601,6 +602,7 @@ class MachineOperatorBuilder final : public ZoneObject {
 
   // load [base + index]
   const Operator* Load(LoadRepresentation rep);
+  const Operator* TrapableLoad(LoadRepresentation rep);
 
   // store [base + index], value
   const Operator* Store(StoreRepresentation rep);