[LLVMbugs] [Bug 12638] New: wrong results on ARM with -O2

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12638

             Bug #: 12638
           Summary: wrong results on ARM with -O2
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: weimingz at codeaurora.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8437
  --> http://llvm.org/bugs/attachment.cgi?id=8437
the test case

on ARM, for check.ll, 
%6 should be "7", but with -O2, its value is "6". (-O0 is fine)

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