[Webkit-unassigned] [Bug 187537] New: DFG JIT: compileMathIC produces incorrect machine code

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jul 10 16:02:18 PDT 2018


https://bugs.webkit.org/show_bug.cgi?id=187537

            Bug ID: 187537
           Summary: DFG JIT: compileMathIC produces incorrect machine code
           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: msaboff at apple.com

When handling ArithMult in the DFG in some cases with a constant value, we can end up JITMulGenerator::generateInline() without selecting a register.  This causes JITMulGenerator::generateInline() to generate bad code.

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