[LLVMbugs] [Bug 4487] New: instcombine fails

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Jul 1 09:05:53 PDT 2009


           Summary: instcombine fails
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: opt
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: rafael.espindola at gmail.com
                CC: llvmbugs at cs.uiuc.edu

"opt -instcombine" fails on the following test:

define i32 @test(i64 %a) {
        %t1 = bitcast i64 %a to <2 x i32>
        %t2 = bitcast i64 %a to <2 x i32>
        %t3 = xor <2 x i32> %t1, %t2
        %t4 = extractelement <2 x i32> %t3, i32 0
        ret i32 %t4

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