Implement UnalignedLoad and UnalignedStore in WASM using LoadByte/Shift/Or and StoreByte/Shift/And.

src/compiler/machine-operator.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/machine-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 
@@ skipping 512 matching lines @@
   };                                                                           \
   AtomicStore##Type##Operator kAtomicStore##Type;
   ATOMIC_REPRESENTATION_LIST(ATOMIC_STORE)
 #undef STORE
 };
 
 
 static base::LazyInstance<MachineOperatorGlobalCache>::type kCache =
     LAZY_INSTANCE_INITIALIZER;
 
-
-MachineOperatorBuilder::MachineOperatorBuilder(Zone* zone,
-                                               MachineRepresentation word,
-                                               Flags flags)
-    : cache_(kCache.Get()), word_(word), flags_(flags) {
+MachineOperatorBuilder::MachineOperatorBuilder(
+    Zone* zone, MachineRepresentation word, Flags flags,
+    AlignmentRequirements alignmentConfig)

[Jarin, 2016/05/12 04:26:13]

Style nit: alignmentConfig -> alignment_config (here and below)

+    : cache_(kCache.Get()),
+      word_(word),
+      flags_(flags),
+      alignmentConfig_(alignmentConfig) {
   DCHECK(word == MachineRepresentation::kWord32 ||
          word == MachineRepresentation::kWord64);
 }
 
 
 #define PURE(Name, properties, value_input_count, control_input_count, \
              output_count)                                             \
   const Operator* MachineOperatorBuilder::Name() { return &cache_.k##Name; }
 PURE_OP_LIST(PURE)
 #undef PURE
@@ skipping 116 matching lines @@
   }
   ATOMIC_REPRESENTATION_LIST(STORE)
 #undef STORE
   UNREACHABLE();
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8