Imported WebKit commit 68645295d2e3e09af2c942f092556f06aa5f8b0d (http://svn.webkit.org/repository/webkit/trunk@128073)

New snapshot

1 files changed, 24 insertions, 1 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGArrayMode.h b/Source/JavaScriptCore/dfg/DFGArrayMode.h
index 6ce62ae72..36a8637f5 100644
--- a/Source/JavaScriptCore/dfg/DFGArrayMode.h
+++ b/Source/JavaScriptCore/dfg/DFGArrayMode.h
@@ -63,12 +63,25 @@ enum Mode {
 
 Array::Mode fromObserved(ArrayModes modes, bool makeSafe);
 
+Array::Mode fromStructure(Structure*, bool makeSafe);
+
 Array::Mode refineArrayMode(Array::Mode, SpeculatedType base, SpeculatedType index);
 
 bool modeAlreadyChecked(AbstractValue&, Array::Mode);
 
 const char* modeToString(Array::Mode);
 
+inline bool modeIsJSArray(Array::Mode arrayMode)
+{
+    switch (arrayMode) {
+    case Array::JSArray:
+    case Array::JSArrayOutOfBounds:
+        return true;
+    default:
+        return false;
+    }
+}
+
 inline bool canCSEStorage(Array::Mode arrayMode)
 {
     switch (arrayMode) {
@@ -82,6 +95,11 @@ inline bool canCSEStorage(Array::Mode arrayMode)
     }
 }
 
+inline bool lengthNeedsStorage(Array::Mode arrayMode)
+{
+    return modeIsJSArray(arrayMode);
+}
+
 inline Array::Mode modeForPut(Array::Mode arrayMode)
 {
     switch (arrayMode) {
@@ -115,7 +133,7 @@ inline bool modesCompatibleForStorageLoad(Array::Mode left, Array::Mode right)
     return false;
 }
 
-inline bool modeSupportsLength(Array::Mode mode)
+inline bool modeIsSpecific(Array::Mode mode)
 {
     switch (mode) {
     case Array::Undecided:
@@ -127,6 +145,11 @@ inline bool modeSupportsLength(Array::Mode mode)
     }
 }
 
+inline bool modeSupportsLength(Array::Mode mode)
+{
+    return modeIsSpecific(mode);
+}
+
 } } // namespace JSC::DFG
 
 #endif // ENABLE(DFG_JIT)