Add a testcase which got fixed by recent legalization work.
; RUN: llvm-as < %s | llc -march=x86-64
; PR3886

define i32 @main(i32 %argc, i8** nocapture %argv) nounwind {
entry:
        %a = call <1 x i64> @bar()
        %tmp5.i = extractelement <1 x i64> %a, i32 0
        %tmp11 = bitcast i64 %tmp5.i to <1 x i64>
        %tmp8 = extractelement <1 x i64> %tmp11, i32 0
        %call6 = call i32 (i64)* @foo(i64 %tmp8)
        ret i32 undef
}

declare i32 @foo(i64)

declare <1 x i64> @bar()