[Webkit-unassigned] [Bug 23941] New: Remove (/reduce) use of hard-wired register names from the JIT.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Feb 12 18:47:04 PST 2009


           Summary: Remove (/reduce) use of hard-wired register names from
                    the JIT.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: barraclough at apple.com

Currently there is no abstraction of registers used in the JIT, which has a
number of negative consequences.  Hard-wiring x86 register names makes the JIT
less portable to other platforms, and prevents us from performing dynamic
register allocation to attempt to maintain more temporary values in machine
registers.  (The latter will be more important on x86-64, where we have more
registers to make use of).

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