Inline array constructor.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 99c160b51d5c79e93fa2675745387428fa207c31..2dcd9383bcee86bc1056dce277647e5e9bf31eb4 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5563,7 +5563,13 @@ class DependentCode: public FixedArray {
     // Group of code that depends on global property values in property cells
     // not being changed.
     kPropertyCellChangedGroup,
-    kGroupCount = kPropertyCellChangedGroup + 1
+    // Group of code that depends on tenuring information in AllocationSites
+    // not being changed.
+    kAllocationSiteTenuringChangedGroup,
+    // Group of code that depends on element transition information in
+    // AllocationSites not being changed.
+    kAllocationSiteTransitionChangedGroup,
+    kGroupCount = kAllocationSiteTransitionChangedGroup + 1
   };
 
   // Array for holding the index of the first code object of each group.
@@ -8077,13 +8083,32 @@ class AllocationSite: public Struct {
   // This method is expensive, it should only be called for reporting.
   bool IsNestedSite();
 
+  class ElementsKindBits:       public BitField<ElementsKind, 0,  15> {};
+  class UnusedBits:             public BitField<int,          15, 14> {};
+  class DoNotInlineBit:         public BitField<bool,         29,  1> {};
+
   ElementsKind GetElementsKind() {
     ASSERT(!SitePointsToLiteral());
-    return static_cast<ElementsKind>(Smi::cast(transition_info())->value());
+    int value = Smi::cast(transition_info())->value();
+    return ElementsKindBits::decode(value);
   }
 
   void SetElementsKind(ElementsKind kind) {
-    set_transition_info(Smi::FromInt(static_cast<int>(kind)));
+    int value = Smi::cast(transition_info())->value();
+    set_transition_info(Smi::FromInt(ElementsKindBits::update(value, kind)),
+                        SKIP_WRITE_BARRIER);
+  }
+
+  bool CanInlineCall() {
+    int value = Smi::cast(transition_info())->value();
+    return DoNotInlineBit::decode(value) == 0;
+  }
+
+  void SetDoNotInlineCall() {
+    int value = Smi::cast(transition_info())->value();
+    value |= (1 << 16);

[Toon Verwaest, 2013/11/11 13:59:28]

Remove the line above.

[mvstanton, 2013/11/13 14:12:52]

oops!

+    set_transition_info(Smi::FromInt(DoNotInlineBit::update(value, true)),
+                        SKIP_WRITE_BARRIER);
   }
 
   bool SitePointsToLiteral() {
@@ -8093,6 +8118,16 @@ class AllocationSite: public Struct {
     return transition_info()->IsJSArray() || transition_info()->IsJSObject();
   }
 
+  MaybeObject* DigestTransitionFeedback(ElementsKind to_kind);
+
+  enum Reason {
+    TENURING,
+    TRANSITIONS
+  };
+
+  void AddDependentCompilationInfo(Reason reason, CompilationInfo* info);
+  void AddDependentCode(Reason reason, Handle<Code> code);
+
   DECLARE_PRINTER(AllocationSite)
   DECLARE_VERIFIER(AllocationSite)
 
@@ -8113,6 +8148,7 @@ class AllocationSite: public Struct {
                               kSize> BodyDescriptor;
 
  private:
+  inline DependentCode::DependencyGroup ToDependencyGroup(Reason reason);
   DISALLOW_IMPLICIT_CONSTRUCTORS(AllocationSite);
 };