[Webkit-unassigned] [Bug 153046] New: The StringFromCharCode DFG intrinsic should support untyped operands.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=153046

            Bug ID: 153046
           Summary: The StringFromCharCode DFG intrinsic should support
                    untyped operands.
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mark.lam at apple.com

The current StringFromCharCode DFG intrinsic assumes that its operand charCode must be an Int32.  This results in 26000+ BadType OSR exits in the LongSpider crypto-aes benchmark.  With support for Untyped operands, the number of OSR exits drops to 202.

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