[Webkit-unassigned] [Bug 152370] New: ARM64 MacroAssembler improperly reuses data temp register in test32() and test8() calls

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152370

            Bug ID: 152370
           Summary: ARM64 MacroAssembler improperly reuses data temp
                    register in test32() and test8() calls
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iOS
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: msaboff at apple.com

The void test32(ResultCondition cond, Address address, TrustedImm32 mask, RegisterID dest) and the similar test8() use the dataTempRegister with the value loaded from "address" and then call void test32(ResultCondition cond, RegisterID src, TrustedImm32 mask, RegisterID dest).  The two register version of test32 can use the dataTempRegister to materialize the immediate mask.

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