WIP: wasm oob trap handling experiments

src/compiler/machine-operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/machine-type.h"
 
@@ skipping 23 matching lines @@
   const Operator* placeholder() const { return op_; }
 
  private:
   bool supported_;
   const Operator* const op_;
 };
 
 
 // A Load needs a MachineType.
 typedef MachineType LoadRepresentation;
+typedef MachineType TrapableLoadRepresentation;
 
 LoadRepresentation LoadRepresentationOf(Operator const*);
 
 // A Store needs a MachineType and a WriteBarrierKind in order to emit the
 // correct write barrier.
 class StoreRepresentation final {
  public:
   StoreRepresentation(MachineRepresentation representation,
                       WriteBarrierKind write_barrier_kind)
       : representation_(representation),
@@ skipping 540 matching lines @@
   const Operator* Simd128Store1();
   const Operator* Simd128Store2();
   const Operator* Simd128Store3();
   const Operator* Simd128And();
   const Operator* Simd128Or();
   const Operator* Simd128Xor();
   const Operator* Simd128Not();
 
   // load [base + index]
   const Operator* Load(LoadRepresentation rep);
+  const Operator* TrapableLoad(LoadRepresentation rep);
 
   // store [base + index], value
   const Operator* Store(StoreRepresentation rep);
 
   // unaligned load [base + index]
   const Operator* UnalignedLoad(UnalignedLoadRepresentation rep);
 
   // unaligned store [base + index], value
   const Operator* UnalignedStore(UnalignedStoreRepresentation rep);
 
@@ skipping 72 matching lines @@
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_