[Webkit-unassigned] [Bug 149540] New: FTLOSRExitCompiler has dead code in callee saves loop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149540

            Bug ID: 149540
           Summary: FTLOSRExitCompiler has dead code in callee saves loop
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sbarati at apple.com
                CC: benjamin at webkit.org, fpizlo at apple.com,
                    ggaren at apple.com, gskachkov at gmail.com,
                    keith_miller at apple.com, mark.lam at apple.com,
                    msaboff at apple.com, oliver at apple.com,
                    sukolsak at gmail.com, utatane.tea at gmail.com

The first line in the loop "continue"s if "reg.isGPR()" is false.
Later in the loop, we check "reg.isGPR()" and an else clause if it's false.
This else clause is dead code.

We need to decide if we don't need the else clause or if the check at the top of the loop is faulty.

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