Bug 113819 - fourthTier: FTL should have the equivalent of a ValueRecovery
Summary: fourthTier: FTL should have the equivalent of a ValueRecovery
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Filip Pizlo
Depends on:
Blocks: 113623
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Reported: 2013-04-02 12:21 PDT by Filip Pizlo
Modified: 2013-04-02 12:52 PDT (History)
7 users (show)

See Also:

the patch (10.19 KB, patch)
2013-04-02 12:26 PDT, Filip Pizlo
mhahnenberg: review+
Details | Formatted Diff | Diff

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Description Filip Pizlo 2013-04-02 12:21:22 PDT
ValueRecoveries speak of registers. The FTL doesn't speak of registers. Also, the FTL doesn't have to reason about the plethora of places that a value could have been put into; it just needs to know the LLVMValueRef (i.e. LValue).  In fact, the FTL really just needs to speak in terms of values-with-formats - essentially a modestly type-refined LLVM value.
Comment 1 Filip Pizlo 2013-04-02 12:26:45 PDT
Created attachment 196209 [details]
the patch
Comment 2 Mark Hahnenberg 2013-04-02 12:30:54 PDT
Comment on attachment 196209 [details]
the patch

Comment 3 Filip Pizlo 2013-04-02 12:52:35 PDT
Landed in http://trac.webkit.org/changeset/147487