[Webkit-unassigned] [Bug 171131] New: Air::fixObviousSpills should remove totally redundant instructions

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Apr 21 12:48:57 PDT 2017


https://bugs.webkit.org/show_bug.cgi?id=171131

            Bug ID: 171131
           Summary: Air::fixObviousSpills should remove totally redundant
                    instructions
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

If you know that (blah) and %foo are n-bit aliased and you do an n-bit move from (blah) to %foo or vice-versa, then you can remove the move.

If you know that (blah) and $42 are n-bit aliased and you do an n-bit move from $42 to (blah), then you can remove the move.

If you know that %foo and $42 are n-bit aliased and you do an n-bit move from $42 to %foo, then you can remove the move.

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