[LLVMbugs] [Bug 4510] New: -instcombine incorrectly eats certain vector operations

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4510

           Summary: -instcombine incorrectly eats certain vector operations
           Product: libraries
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: arplynn at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=3157)
 --> (http://llvm.org/bugs/attachment.cgi?id=3157)
Test case.

Running -mem2reg -instcombine on the attached testcase turns it (incorrectly)
into a simple ret void.


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