This causes Acid3 failures – reverting for now & will revisit later.
Created attachment 26040 [details] The patch
Comment on attachment 26040 [details] The patch rs=me
Sending JavaScriptCore/ChangeLog Sending JavaScriptCore/interpreter/Interpreter.h Sending JavaScriptCore/jit/JIT.cpp Sending JavaScriptCore/jit/JIT.h Sending JavaScriptCore/jit/JITInlineMethods.h Sending JavaScriptCore/jit/JITPropertyAccess.cpp Sending JavaScriptCore/wtf/Platform.h Transmitting file data ....... Committed revision 39325.