; RUN: llc -O0 < %s -o /dev/null
; llc should not crash on this invalid input.
; PR6588
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone

define void @foo() {
entry:
  call void @llvm.dbg.declare(metadata !{i32* undef}, metadata !0)
  ret void
}

!0 = metadata !{i32 524545, metadata !1, metadata !"sy", metadata !2, i32 890, metadata !7} ; [ DW_TAG_arg_variable ]
!1 = metadata !{i32 524334, metadata !8, metadata !3, metadata !"foo", metadata !"foo", metadata !"foo", i32 892, metadata !4, i1 false, i1 true, i32 0, i32 0, null, i1 false, i32 0, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ]
!2 = metadata !{i32 524329, metadata !8} ; [ DW_TAG_file_type ]
!3 = metadata !{i32 524305, metadata !9, i32 4, metadata !"clang 1.1", i1 true, metadata !"", i32 0, metadata !10, metadata !10, null, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
!4 = metadata !{i32 524309, metadata !9, metadata !5, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!5 = metadata !{i32 524329, metadata !9} ; [ DW_TAG_file_type ]
!6 = metadata !{null}
!7 = metadata !{i32 524324, metadata !9, metadata !5, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!8 = metadata !{metadata !"qpainter.h", metadata !"QtGui"}
!9 = metadata !{metadata !"splineeditor.cpp", metadata !"src"}
!10 = metadata !{i32 0}