Implement optional turbofan UnalignedLoad and UnalignedStore operators

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 61 matching lines @@
   DCHECK_EQ(IrOpcode::kLoad, op->opcode());
   return OpParameter<LoadRepresentation>(op);
 }
 
 
 StoreRepresentation const& StoreRepresentationOf(Operator const* op) {
   DCHECK_EQ(IrOpcode::kStore, op->opcode());
   return OpParameter<StoreRepresentation>(op);
 }
 
+UnalignedLoadRepresentation UnalignedLoadRepresentationOf(Operator const* op) {
+  DCHECK_EQ(IrOpcode::kUnalignedLoad, op->opcode());
+  return OpParameter<UnalignedLoadRepresentation>(op);
+}
+
+UnalignedStoreRepresentation const& UnalignedStoreRepresentationOf(
+    Operator const* op) {
+  DCHECK_EQ(IrOpcode::kUnalignedStore, op->opcode());
+  return OpParameter<UnalignedStoreRepresentation>(op);
+}
 
 CheckedLoadRepresentation CheckedLoadRepresentationOf(Operator const* op) {
   DCHECK_EQ(IrOpcode::kCheckedLoad, op->opcode());
   return OpParameter<CheckedLoadRepresentation>(op);
 }
 
 
 CheckedStoreRepresentation CheckedStoreRepresentationOf(Operator const* op) {
   DCHECK_EQ(IrOpcode::kCheckedStore, op->opcode());
   return OpParameter<CheckedStoreRepresentation>(op);
@@ skipping 185 matching lines @@
   TruncateFloat64ToInt32Operator<TruncationMode::kRoundToZero>
       kTruncateFloat64ToInt32RoundToZero;
 
 #define LOAD(Type)                                                             \
   struct Load##Type##Operator final : public Operator1<LoadRepresentation> {   \
     Load##Type##Operator()                                                     \
         : Operator1<LoadRepresentation>(                                       \
               IrOpcode::kLoad, Operator::kNoThrow | Operator::kNoWrite,        \
               "Load", 2, 1, 1, 1, 1, 0, MachineType::Type()) {}                \
   };                                                                           \
+  struct UnalignedLoad##Type##Operator final                                   \
+      : public Operator1<UnalignedLoadRepresentation> {                        \
+    UnalignedLoad##Type##Operator()                                            \
+        : Operator1<UnalignedLoadRepresentation>(                              \
+              IrOpcode::kUnalignedLoad,                                        \
+              Operator::kNoThrow | Operator::kNoWrite, "UnalignedLoad", 2, 1,  \
+              1, 1, 1, 0, MachineType::Type()) {}                              \
+  };                                                                           \
   struct CheckedLoad##Type##Operator final                                     \
       : public Operator1<CheckedLoadRepresentation> {                          \
     CheckedLoad##Type##Operator()                                              \
         : Operator1<CheckedLoadRepresentation>(                                \
               IrOpcode::kCheckedLoad, Operator::kNoThrow | Operator::kNoWrite, \
               "CheckedLoad", 3, 1, 1, 1, 1, 0, MachineType::Type()) {}         \
   };                                                                           \
   Load##Type##Operator kLoad##Type;                                            \
+  UnalignedLoad##Type##Operator kUnalignedLoad##Type;                          \
   CheckedLoad##Type##Operator kCheckedLoad##Type;
   MACHINE_TYPE_LIST(LOAD)
 #undef LOAD
 
 #define STACKSLOT(Type)                                                       \
   struct StackSlot##Type##Operator final                                      \
       : public Operator1<MachineRepresentation> {                             \
     StackSlot##Type##Operator()                                               \
         : Operator1<MachineRepresentation>(                                   \
               IrOpcode::kStackSlot, Operator::kNoThrow, "StackSlot", 0, 0, 0, \
@@ skipping 25 matching lines @@
   struct Store##Type##PointerWriteBarrier##Operator final                      \
       : public Store##Type##Operator {                                         \
     Store##Type##PointerWriteBarrier##Operator()                               \
         : Store##Type##Operator(kPointerWriteBarrier) {}                       \
   };                                                                           \
   struct Store##Type##FullWriteBarrier##Operator final                         \
       : public Store##Type##Operator {                                         \
     Store##Type##FullWriteBarrier##Operator()                                  \
         : Store##Type##Operator(kFullWriteBarrier) {}                          \
   };                                                                           \
+  struct UnalignedStore##Type##Operator final                                  \
+      : public Operator1<UnalignedStoreRepresentation> {                       \
+    UnalignedStore##Type##Operator()                                           \
+        : Operator1<UnalignedStoreRepresentation>(                             \
+              IrOpcode::kUnalignedStore,                                       \
+              Operator::kNoRead | Operator::kNoThrow, "UnalignedStore", 3, 1,  \
+              1, 0, 1, 0, MachineRepresentation::Type) {}                      \
+  };                                                                           \
   struct CheckedStore##Type##Operator final                                    \
       : public Operator1<CheckedStoreRepresentation> {                         \
     CheckedStore##Type##Operator()                                             \
         : Operator1<CheckedStoreRepresentation>(                               \
               IrOpcode::kCheckedStore, Operator::kNoRead | Operator::kNoThrow, \
               "CheckedStore", 4, 1, 1, 0, 1, 0, MachineRepresentation::Type) { \
     }                                                                          \
   };                                                                           \
   Store##Type##NoWriteBarrier##Operator kStore##Type##NoWriteBarrier;          \
   Store##Type##MapWriteBarrier##Operator kStore##Type##MapWriteBarrier;        \
   Store##Type##PointerWriteBarrier##Operator                                   \
       kStore##Type##PointerWriteBarrier;                                       \
   Store##Type##FullWriteBarrier##Operator kStore##Type##FullWriteBarrier;      \
+  UnalignedStore##Type##Operator kUnalignedStore##Type;                        \
   CheckedStore##Type##Operator kCheckedStore##Type;
   MACHINE_REPRESENTATION_LIST(STORE)
 #undef STORE
 };
 
 
 static base::LazyInstance<MachineOperatorGlobalCache>::type kCache =
     LAZY_INSTANCE_INITIALIZER;
 
 
@@ skipping 74 matching lines @@
     MACHINE_REPRESENTATION_LIST(STORE)
 #undef STORE
     case MachineRepresentation::kBit:
     case MachineRepresentation::kNone:
       break;
   }
   UNREACHABLE();
   return nullptr;
 }
 
+const OptionalOperator MachineOperatorBuilder::UnalignedLoad(
+    UnalignedLoadRepresentation rep) {
+#define LOAD(Type)                                                         \
+  if (rep == MachineType::Type()) {                                        \
+    return OptionalOperator(                                               \
+        flags_ & kUnalignedLoad ? &cache_.kUnalignedLoad##Type : nullptr); \
+  }
+  MACHINE_TYPE_LIST(LOAD)
+#undef LOAD
+  UNREACHABLE();
+  return OptionalOperator(nullptr);
+}
+
+const OptionalOperator MachineOperatorBuilder::UnalignedStore(
+    UnalignedStoreRepresentation rep) {
+  switch (rep) {
+#define STORE(kRep)                 \
+  case MachineRepresentation::kRep: \
+    return OptionalOperator(        \
+        flags_ & kUnalignedStore ? &cache_.kUnalignedStore##kRep : nullptr);
+    MACHINE_REPRESENTATION_LIST(STORE)
+#undef STORE
+    case MachineRepresentation::kBit:
+    case MachineRepresentation::kNone:
+      break;
+  }
+  UNREACHABLE();
+  return OptionalOperator(nullptr);
+}
 
 const Operator* MachineOperatorBuilder::CheckedLoad(
     CheckedLoadRepresentation rep) {
 #define LOAD(Type)                     \
   if (rep == MachineType::Type()) {    \
     return &cache_.kCheckedLoad##Type; \
   }
     MACHINE_TYPE_LIST(LOAD)
 #undef LOAD
   UNREACHABLE();
@@ skipping 26 matching lines @@
 
 // On 32 bit platforms we need to get a reference to optional operators of
 // 64-bit instructions for later Int64Lowering, even though 32 bit platforms
 // don't support the original 64-bit instruction.
 const Operator* MachineOperatorBuilder::Word64CtzPlaceholder() {
   return &cache_.kWord64Ctz;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8