[Webkit-unassigned] [Bug 80779] New: All DFG nodes should have a mutable set of flags
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sat Mar 10 22:09:39 PST 2012
https://bugs.webkit.org/show_bug.cgi?id=80779
Summary: All DFG nodes should have a mutable set of flags
Product: WebKit
Version: 528+ (Nightly build)
Platform: All
OS/Version: All
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: fpizlo at apple.com
Currently some nodes have a mutable set of arithmetic use flags, and all nodes have a mostly-immutable set of flags baked into their opcode.
Instead, the opcode should be a 16-bit quantity that does not include any flags, and separately, there should be a 16-bit flags that combines the current flags-that-are-in-the-opcode and the arithmetic flags.
This will facilitate richer backward flow analyses and should make manipulating the DFG IR generally easier.
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