Simplify KeyedAccessStoreMode.

The map tells us the source elements kind, and holeyness.

BUG=

Review URL: https://codereview.chromium.org/1303813004

Cr-Commit-Position: refs/heads/master@{#30274}

src/ic/ic.cc

@@ -1972,22 +1972,20 @@ Handle<Code> KeyedStoreIC::StoreElementStub(Handle<JSObject> receiver,
 Handle<Map> KeyedStoreIC::ComputeTransitionedMap(
     Handle<Map> map, KeyedAccessStoreMode store_mode) {
   switch (store_mode) {
-    case STORE_TRANSITION_SMI_TO_OBJECT:
-    case STORE_TRANSITION_DOUBLE_TO_OBJECT:
-    case STORE_AND_GROW_TRANSITION_SMI_TO_OBJECT:
-    case STORE_AND_GROW_TRANSITION_DOUBLE_TO_OBJECT:
-      return Map::TransitionElementsTo(map, FAST_ELEMENTS);
-    case STORE_TRANSITION_SMI_TO_DOUBLE:
-    case STORE_AND_GROW_TRANSITION_SMI_TO_DOUBLE:
-      return Map::TransitionElementsTo(map, FAST_DOUBLE_ELEMENTS);
-    case STORE_TRANSITION_HOLEY_SMI_TO_OBJECT:
-    case STORE_TRANSITION_HOLEY_DOUBLE_TO_OBJECT:
-    case STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_OBJECT:
-    case STORE_AND_GROW_TRANSITION_HOLEY_DOUBLE_TO_OBJECT:
-      return Map::TransitionElementsTo(map, FAST_HOLEY_ELEMENTS);
-    case STORE_TRANSITION_HOLEY_SMI_TO_DOUBLE:
-    case STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_DOUBLE:
-      return Map::TransitionElementsTo(map, FAST_HOLEY_DOUBLE_ELEMENTS);
+    case STORE_TRANSITION_TO_OBJECT:
+    case STORE_AND_GROW_TRANSITION_TO_OBJECT: {
+      ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind())
+                              ? FAST_HOLEY_ELEMENTS
+                              : FAST_ELEMENTS;
+      return Map::TransitionElementsTo(map, kind);
+    }
+    case STORE_TRANSITION_TO_DOUBLE:
+    case STORE_AND_GROW_TRANSITION_TO_DOUBLE: {
+      ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind())
+                              ? FAST_HOLEY_DOUBLE_ELEMENTS
+                              : FAST_DOUBLE_ELEMENTS;
+      return Map::TransitionElementsTo(map, kind);
+    }
     case STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS:
       DCHECK(map->has_fixed_typed_array_elements());
     // Fall through
@@ -2023,26 +2021,14 @@ static KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver,
     // Handle growing array in stub if necessary.
     if (receiver->HasFastSmiElements()) {
       if (value->IsHeapNumber()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_DOUBLE;
-        } else {
-          return STORE_AND_GROW_TRANSITION_SMI_TO_DOUBLE;
-        }
+        return STORE_AND_GROW_TRANSITION_TO_DOUBLE;
       }
       if (value->IsHeapObject()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_OBJECT;
-        } else {
-          return STORE_AND_GROW_TRANSITION_SMI_TO_OBJECT;
-        }
+        return STORE_AND_GROW_TRANSITION_TO_OBJECT;
       }
     } else if (receiver->HasFastDoubleElements()) {
       if (!value->IsSmi() && !value->IsHeapNumber()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_AND_GROW_TRANSITION_HOLEY_DOUBLE_TO_OBJECT;
-        } else {
-          return STORE_AND_GROW_TRANSITION_DOUBLE_TO_OBJECT;
-        }
+        return STORE_AND_GROW_TRANSITION_TO_OBJECT;
       }
     }
     return STORE_AND_GROW_NO_TRANSITION;
@@ -2050,25 +2036,13 @@ static KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver,
     // Handle only in-bounds elements accesses.
     if (receiver->HasFastSmiElements()) {
       if (value->IsHeapNumber()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_TRANSITION_HOLEY_SMI_TO_DOUBLE;
-        } else {
-          return STORE_TRANSITION_SMI_TO_DOUBLE;
-        }
+        return STORE_TRANSITION_TO_DOUBLE;
       } else if (value->IsHeapObject()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_TRANSITION_HOLEY_SMI_TO_OBJECT;
-        } else {
-          return STORE_TRANSITION_SMI_TO_OBJECT;
-        }
+        return STORE_TRANSITION_TO_OBJECT;
       }
     } else if (receiver->HasFastDoubleElements()) {
       if (!value->IsSmi() && !value->IsHeapNumber()) {
-        if (receiver->HasFastHoleyElements()) {
-          return STORE_TRANSITION_HOLEY_DOUBLE_TO_OBJECT;
-        } else {
-          return STORE_TRANSITION_DOUBLE_TO_OBJECT;
-        }
+        return STORE_TRANSITION_TO_OBJECT;
       }
     }
     if (!FLAG_trace_external_array_abuse &&

src/objects.h

@@ -155,19 +155,11 @@ namespace internal {
 
 enum KeyedAccessStoreMode {
   STANDARD_STORE,
-  STORE_TRANSITION_SMI_TO_OBJECT,
-  STORE_TRANSITION_SMI_TO_DOUBLE,
-  STORE_TRANSITION_DOUBLE_TO_OBJECT,
-  STORE_TRANSITION_HOLEY_SMI_TO_OBJECT,
-  STORE_TRANSITION_HOLEY_SMI_TO_DOUBLE,
-  STORE_TRANSITION_HOLEY_DOUBLE_TO_OBJECT,
+  STORE_TRANSITION_TO_OBJECT,
+  STORE_TRANSITION_TO_DOUBLE,
   STORE_AND_GROW_NO_TRANSITION,
-  STORE_AND_GROW_TRANSITION_SMI_TO_OBJECT,
-  STORE_AND_GROW_TRANSITION_SMI_TO_DOUBLE,
-  STORE_AND_GROW_TRANSITION_DOUBLE_TO_OBJECT,
-  STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_OBJECT,
-  STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_DOUBLE,
-  STORE_AND_GROW_TRANSITION_HOLEY_DOUBLE_TO_OBJECT,
+  STORE_AND_GROW_TRANSITION_TO_OBJECT,
+  STORE_AND_GROW_TRANSITION_TO_DOUBLE,
   STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS,
   STORE_NO_TRANSITION_HANDLE_COW
 };
@@ -195,34 +187,11 @@ enum ExternalArrayType {
 };
 
 
-static const int kGrowICDelta = STORE_AND_GROW_NO_TRANSITION -
-    STANDARD_STORE;
-STATIC_ASSERT(STANDARD_STORE == 0);
-STATIC_ASSERT(kGrowICDelta ==
-              STORE_AND_GROW_TRANSITION_SMI_TO_OBJECT -
-              STORE_TRANSITION_SMI_TO_OBJECT);
-STATIC_ASSERT(kGrowICDelta ==
-              STORE_AND_GROW_TRANSITION_SMI_TO_DOUBLE -
-              STORE_TRANSITION_SMI_TO_DOUBLE);
-STATIC_ASSERT(kGrowICDelta ==
-              STORE_AND_GROW_TRANSITION_DOUBLE_TO_OBJECT -
-              STORE_TRANSITION_DOUBLE_TO_OBJECT);
-
-
-static inline KeyedAccessStoreMode GetGrowStoreMode(
-    KeyedAccessStoreMode store_mode) {
-  if (store_mode < STORE_AND_GROW_NO_TRANSITION) {
-    store_mode = static_cast<KeyedAccessStoreMode>(
-        static_cast<int>(store_mode) + kGrowICDelta);
-  }
-  return store_mode;
-}
-
-
 static inline bool IsTransitionStoreMode(KeyedAccessStoreMode store_mode) {
-  return store_mode > STANDARD_STORE &&
-      store_mode <= STORE_AND_GROW_TRANSITION_HOLEY_DOUBLE_TO_OBJECT &&
-      store_mode != STORE_AND_GROW_NO_TRANSITION;
+  return store_mode == STORE_TRANSITION_TO_OBJECT ||
+         store_mode == STORE_TRANSITION_TO_DOUBLE ||
+         store_mode == STORE_AND_GROW_TRANSITION_TO_OBJECT ||
+         store_mode == STORE_AND_GROW_TRANSITION_TO_DOUBLE;
 }
 
 
@@ -240,7 +209,7 @@ static inline KeyedAccessStoreMode GetNonTransitioningStoreMode(
 
 static inline bool IsGrowStoreMode(KeyedAccessStoreMode store_mode) {
   return store_mode >= STORE_AND_GROW_NO_TRANSITION &&
-      store_mode <= STORE_AND_GROW_TRANSITION_HOLEY_DOUBLE_TO_OBJECT;
+         store_mode <= STORE_AND_GROW_TRANSITION_TO_DOUBLE;
 }