Bug 131689

Summary:	Turn NodeResultMask in NodeFlags into something that more directly conveys the representation
Product:	WebKit	Reporter:	Filip Pizlo <fpizlo>
Component:	JavaScriptCore	Assignee:	Filip Pizlo <fpizlo>
Status:	NEW ---
Severity:	Normal	CC:	barraclough, ggaren, mark.lam, mhahnenberg, msaboff, oliver, sam
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	All
OS:	All
Bug Depends on:	131423
Bug Blocks:

Description Filip Pizlo 2014-04-15 12:32:10 PDT

Both UseKind and NodeResultMask may convey representation.  The possible representations are Value, Double, and Int52.  We should really have a separate enum for Representation.  NodeResultMask could still internally use the same format as it does now.  Then we could also have the notion of "guaranteeing" that a node returns an Int32, Number, or Boolean - but we should encapsulate this somehow and separate it from NodeResultMask.  That would allow us to get rid of horrible things like canonicalResultRepresentation().