Implement UnaligedLoad and UnaligedStore turbofan 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 28 matching lines @@
          IrOpcode::kAtomicLoad == 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 403 matching lines @@
 #undef OVERFLOW_OP
 
 #define LOAD(Type)                                                           \
   struct Load##Type##Operator final : public Operator1<LoadRepresentation> { \
     Load##Type##Operator()                                                   \
         : Operator1<LoadRepresentation>(                                     \
               IrOpcode::kLoad,                                               \
               Operator::kNoDeopt | 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::kNoDeopt | 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::kNoDeopt | 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::kNoDeopt | Operator::kNoThrow, \
@@ skipping 27 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::kNoDeopt | 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::kNoDeopt | 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
 
 #define ATOMIC_LOAD(Type)                                                   \
   struct AtomicLoad##Type##Operator final                                   \
       : public Operator1<LoadRepresentation> {                              \
     AtomicLoad##Type##Operator()                                            \
         : Operator1<LoadRepresentation>(                                    \
               IrOpcode::kAtomicLoad,                                        \
@@ skipping 39 matching lines @@
     AlignmentRequirements alignmentRequirements)
     : zone_(zone),
       cache_(kCache.Get()),
       word_(word),
       flags_(flags),
       alignment_requirements_(alignmentRequirements) {
   DCHECK(word == MachineRepresentation::kWord32 ||
          word == MachineRepresentation::kWord64);
 }
 
+const OptionalOperator MachineOperatorBuilder::UnalignedLoad(
+    UnalignedLoadRepresentation rep) {
+#define LOAD(Type)                                         \
+  if (rep == MachineType::Type()) {                        \
+    return OptionalOperator(flags_ & kUnalignedLoad,       \
+                            &cache_.kUnalignedLoad##Type); \
+  }
+  MACHINE_TYPE_LIST(LOAD)
+#undef LOAD
+  UNREACHABLE();
+  return OptionalOperator(false, nullptr);
+}
+
+const OptionalOperator MachineOperatorBuilder::UnalignedStore(
+    UnalignedStoreRepresentation rep) {
+  switch (rep) {
+#define STORE(kRep)                                   \
+  case MachineRepresentation::kRep:                   \
+    return OptionalOperator(flags_ & kUnalignedStore, \
+                            &cache_.kUnalignedStore##kRep);
+    MACHINE_REPRESENTATION_LIST(STORE)
+#undef STORE
+    case MachineRepresentation::kBit:
+    case MachineRepresentation::kNone:
+      break;
+  }
+  UNREACHABLE();
+  return OptionalOperator(false, nullptr);
+}
 
 #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
 
 #define PURE(Name, properties, value_input_count, control_input_count, \
              output_count)                                             \
   const OptionalOperator MachineOperatorBuilder::Name() {              \
@@ skipping 109 matching lines @@
   }
   ATOMIC_REPRESENTATION_LIST(STORE)
 #undef STORE
   UNREACHABLE();
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8