--- /dev/null
+# RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o - | \
+# RUN: llvm-dwarfdump -debug-info - | \
+# RUN: FileCheck %s
+
+# CHECK: .debug_info.dwo contents:
+
+# CHECK: 0x00000000: Compile Unit:
+# CHECK-SAME: length = 0x00000018
+# CHECK-SAME: version = 0x0004
+# CHECK-SAME: abbr_offset = 0x0000
+# CHECK-SAME: addr_size = 0x04
+
+# CHECK: 0x00000017: DW_TAG_compile_unit
+# CHECK-NEXT: DW_AT_name ("a.c")
+# CHECK-NEXT: DW_AT_GNU_dwo_id (0x1100001122222222)
+
+ .section .debug_abbrev.dwo, "e", @progbits
+.LAbbrBegin:
+ .uleb128 1 # Abbreviation Code
+ .uleb128 17 # DW_TAG_compile_unit
+ .byte 0 # DW_CHILDREN_no
+ .uleb128 3 # DW_AT_name
+ .uleb128 8 # DW_FORM_string
+ .uleb128 0x2131 # DW_AT_GNU_dwo_id
+ .uleb128 7 # DW_FORM_data8
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+.LAbbrEnd:
+
+ .section .debug_info.dwo, "e", @progbits
+.LCUBegin:
+ .long 0xffffffff # DWARF64 mark
+ .quad .LCUEnd-.LCUVersion # Length
+.LCUVersion:
+ .short 4 # Version
+ .quad 0 # Abbrev offset
+ .byte 4 # Address size
+ .uleb128 1 # Abbrev [1] DW_TAG_compile_unit
+ .asciz "a.c" # DW_AT_name
+ .quad 0x1100001122222222 # DW_AT_GNU_dwo_id
+.LCUEnd:
+
+ .section .debug_cu_index, "", @progbits
+## Header:
+ .short 2 # Version
+ .space 2 # Padding
+ .long 2 # Section count
+ .long 1 # Unit count
+ .long 4 # Slot count
+## Hash Table of Signatures:
+ .quad 0
+ .quad 0
+ .quad 0x1100001122222222
+ .quad 0
+## Parallel Table of Indexes:
+ .long 0
+ .long 0
+ .long 1
+ .long 0
+## Table of Section Offsets:
+## Row 0:
+ .long 1 # DW_SECT_INFO
+ .long 3 # DW_SECT_ABBREV
+# Row 1:
+ .long .LCUBegin-.debug_info.dwo # Offset in .debug_info.dwo
+ .long .LAbbrBegin-.debug_abbrev.dwo # Offset in .debug_abbrev.dwo
+## Table of Section Sizes:
+ .long .LCUEnd-.LCUBegin
+ .long .LAbbrEnd-.LAbbrBegin