Implement in-heap backing store for typed arrays.

src/elements-kind.h

Index: src/elements-kind.h
diff --git a/src/elements-kind.h b/src/elements-kind.h
index 51a690272f7f122848c3c30538bf9dadbceab7b5..3d55105c373977ba54ce2790b756d891b1129b18 100644
--- a/src/elements-kind.h
+++ b/src/elements-kind.h
@@ -63,13 +63,26 @@ enum ElementsKind {
   EXTERNAL_DOUBLE_ELEMENTS,
   EXTERNAL_PIXEL_ELEMENTS,
 
+  // Fixed typed arrays
+  UINT8_ELEMENTS,
+  INT8_ELEMENTS,
+  UINT16_ELEMENTS,
+  INT16_ELEMENTS,
+  UINT32_ELEMENTS,
+  INT32_ELEMENTS,
+  FLOAT32_ELEMENTS,
+  FLOAT64_ELEMENTS,
+  UINT8_CLAMPED_ELEMENTS,
+
   // Derived constants from ElementsKind
   FIRST_ELEMENTS_KIND = FAST_SMI_ELEMENTS,
-  LAST_ELEMENTS_KIND = EXTERNAL_PIXEL_ELEMENTS,
+  LAST_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   FIRST_FAST_ELEMENTS_KIND = FAST_SMI_ELEMENTS,
   LAST_FAST_ELEMENTS_KIND = FAST_HOLEY_DOUBLE_ELEMENTS,
   FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_BYTE_ELEMENTS,
   LAST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_PIXEL_ELEMENTS,
+  FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_ELEMENTS,
+  LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   TERMINAL_FAST_ELEMENTS_KIND = FAST_HOLEY_ELEMENTS
 };
 
@@ -103,6 +116,12 @@ inline bool IsExternalArrayElementsKind(ElementsKind kind) {
 }
 
 
+inline bool IsFixedTypedArrayElementsKind(ElementsKind kind) {
+  return kind >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
+      kind <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
+}
+
+
 inline bool IsFastElementsKind(ElementsKind kind) {
   ASSERT(FIRST_FAST_ELEMENTS_KIND == 0);
   return kind <= FAST_HOLEY_DOUBLE_ELEMENTS;
@@ -121,9 +140,15 @@ inline bool IsExternalFloatOrDoubleElementsKind(ElementsKind kind) {
 }
 
 
+inline bool IsFixedFloatElementsKind(ElementsKind kind) {
+  return kind == FLOAT32_ELEMENTS || kind == FLOAT64_ELEMENTS;
+}
+
+
 inline bool IsDoubleOrFloatElementsKind(ElementsKind kind) {
   return IsFastDoubleElementsKind(kind) ||
-      IsExternalFloatOrDoubleElementsKind(kind);
+      IsExternalFloatOrDoubleElementsKind(kind) ||
+      IsFixedFloatElementsKind(kind);
 }