; RUN: llc -O2 < %s | FileCheck %s
; RUN: llc -O2 -regalloc=basic < %s | FileCheck %s
; Test to check that unused argument 'this' is not undefined in debug info.

target triple = "x86_64-apple-darwin10.2"
%struct.foo = type { i32 }

@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 (%struct.foo*, i32)* @_ZN3foo3bazEi to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0]

define i32 @_ZN3foo3bazEi(%struct.foo* nocapture %this, i32 %x) nounwind readnone optsize noinline ssp align 2 {
;CHECK: DEBUG_VALUE: baz:this <- RDI{{$}}
entry:
  tail call void @llvm.dbg.value(metadata %struct.foo* %this, i64 0, metadata !15, metadata !{!"0x102"})
  tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !16, metadata !{!"0x102"})
  %0 = mul nsw i32 %x, 7, !dbg !29                ; <i32> [#uses=1]
  %1 = add nsw i32 %0, 1, !dbg !29                ; <i32> [#uses=1]
  ret i32 %1, !dbg !29
}

declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone

!llvm.dbg.cu = !{!4}
!llvm.module.flags = !{!34}
!llvm.dbg.lv = !{!0, !14, !15, !16, !17, !24, !25, !28}

!0 = !{!"0x101\00this\0011\000", !1, !3, !12} ; [ DW_TAG_arg_variable ]
!1 = !{!"0x2e\00bar\00bar\00_ZN3foo3barEi\0011\000\001\000\006\000\001\0011", !31, !2, !9, null, i32 (%struct.foo*, i32)* null, null, null, null} ; [ DW_TAG_subprogram ]
!2 = !{!"0x13\00foo\003\0032\0032\000\000\000", !31, !3, null, !5, null, null, null} ; [ DW_TAG_structure_type ] [foo] [line 3, size 32, align 32, offset 0] [def] [from ]
!3 = !{!"0x29", !31} ; [ DW_TAG_file_type ]
!4 = !{!"0x11\004\004.2.1 LLVM build\001\00\000\00\000", !31, !32, !32, !33, null, null} ; [ DW_TAG_compile_unit ]
!5 = !{!6, !1, !8}
!6 = !{!"0xd\00y\008\0032\0032\000\000", !31, !2, !7} ; [ DW_TAG_member ]
!7 = !{!"0x24\00int\000\0032\0032\000\000\005", !31, !3} ; [ DW_TAG_base_type ]
!8 = !{!"0x2e\00baz\00baz\00_ZN3foo3bazEi\0015\000\001\000\006\000\001\0015", !31, !2, !9, null, i32 (%struct.foo*, i32)* @_ZN3foo3bazEi, null, null, null} ; [ DW_TAG_subprogram ]
!9 = !{!"0x15\00\000\000\000\000\000\000", !31, !3, null, !10, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!10 = !{!7, !11, !7}
!11 = !{!"0xf\00\000\0064\0064\000\0064", !31, !3, !2} ; [ DW_TAG_pointer_type ]
!12 = !{!"0x26\00\000\0064\0064\000\0064", !31, !3, !13} ; [ DW_TAG_const_type ]
!13 = !{!"0xf\00\000\0064\0064\000\000", !31, !3, !2} ; [ DW_TAG_pointer_type ]
!14 = !{!"0x101\00x\0011\000", !1, !3, !7} ; [ DW_TAG_arg_variable ]
!15 = !{!"0x101\00this\0015\000", !8, !3, !12} ; [ DW_TAG_arg_variable ]
!16 = !{!"0x101\00x\0015\000", !8, !3, !7} ; [ DW_TAG_arg_variable ]
!17 = !{!"0x101\00argc\0019\000", !18, !3, !7} ; [ DW_TAG_arg_variable ]
!18 = !{!"0x2e\00main\00main\00main\0019\000\001\000\006\000\001\0019", !31, !3, !19, null, null, null, null, null} ; [ DW_TAG_subprogram ]
!19 = !{!"0x15\00\000\000\000\000\000\000", !31, !3, null, !20, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!20 = !{!7, !7, !21}
!21 = !{!"0xf\00\000\0064\0064\000\000", !31, !3, !22} ; [ DW_TAG_pointer_type ]
!22 = !{!"0xf\00\000\0064\0064\000\000", !31, !3, !23} ; [ DW_TAG_pointer_type ]
!23 = !{!"0x24\00char\000\008\008\000\000\006", !31, !3} ; [ DW_TAG_base_type ]
!24 = !{!"0x101\00argv\0019\000", !18, !3, !21} ; [ DW_TAG_arg_variable ]
!25 = !{!"0x100\00a\0020\000", !26, !3, !2} ; [ DW_TAG_auto_variable ]
!26 = !{!"0xb\0019\000\000", !31, !27} ; [ DW_TAG_lexical_block ]
!27 = !{!"0xb\0019\000\000", !31, !18} ; [ DW_TAG_lexical_block ]
!28 = !{!"0x100\00b\0021\000", !26, !3, !7} ; [ DW_TAG_auto_variable ]
!29 = !MDLocation(line: 16, scope: !30)
!30 = !{!"0xb\0015\000\000", !31, !8} ; [ DW_TAG_lexical_block ]
!31 = !{!"foo.cp", !"/tmp/"}
!32 = !{i32 0}
!33 = !{!1, !8, !18}
!34 = !{i32 1, !"Debug Info Version", i32 2}