[Webkit-unassigned] [Bug 48062] New: Add cmn to branch32(reg, imm) on ARM

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=48062

           Summary: Add cmn to branch32(reg, imm) on ARM
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: loki at webkit.org


There is a missing optimization in the branch32(cond, reg, imm) function on ARM. The conditional comparison can be done with cmn if the imm value is negative and can fit into the cmn instruction.

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