[Webkit-unassigned] [Bug 151146] New: Air::spillEverything and Air::iteratedRegisterCoalescing don't take into account Inst::extraClobberedRegs()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151146

            Bug ID: 151146
           Summary: Air::spillEverything and
                    Air::iteratedRegisterCoalescing don't take into
                    account Inst::extraClobberedRegs()
    Classification: Unclassified
           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

Both allocators have a loop devoted to ensuring that all Def's interfere with each other.  Inst::extraClobberedRegs() is like an extra set of Def's.

This is important because it's what ensures that we don't put something into a register that is clobbered by a call.

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