# REQUIRES: system-linux

# RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %s -o %t.o
# RUN: %clang %cflags -gdwarf-4 %t.o -o %t.exe
# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=POSTCHECK %s

# This test checks that BOLT handles DW_AT_sibling.

# The assembly was manually modified to do cross CU reference.

# POSTCHECK: version = 0x0004
# POSTCHECK: DW_TAG_structure_type [5]
# POSTCHECK: DW_AT_sibling [DW_FORM_ref4]  (cu + 0x0062 => {0x00000062})
# POSTCHECK-EMPTY:
# POSTCHECK-NEXT: DW_TAG_typedef [6]
# POSTCHECK-NEXT: DW_AT_type [DW_FORM_ref4] (cu + 0x0059 => {0x00000059} "structure ")

# typedef struct
# {
#   unsigned a;
#   unsigned b;
# } S;
#
# int main() {
#   S s;
#   s.a = 0x64A40101;
# }

	.text
	.file	"main.cpp"
	.globl	main                            # -- Begin function main
	.p2align	4, 0x90
	.type	main,@function
main:                                   # @main
.Lfunc_begin0:
	.file	1 "/dwarf4-sibling-test" "main.cpp"
	.loc	1 7 0                           # main.cpp:7:0
	.cfi_startproc
# %bb.0:
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset %rbp, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register %rbp
.Ltmp0:
	.loc	1 9 7 prologue_end              # main.cpp:9:7
	movl	$1688469761, -8(%rbp)           # imm = 0x64A40101
	.loc	1 10 1                          # main.cpp:10:1
	xorl	%eax, %eax
	.loc	1 10 1 epilogue_begin is_stmt 0 # main.cpp:10:1
	popq	%rbp
	.cfi_def_cfa %rsp, 8
	retq
.Ltmp1:
.Lfunc_end0:
	.size	main, .Lfunc_end0-main
	.cfi_endproc
                                        # -- End function
	.section	.debug_abbrev,"",@progbits
	.byte	1                               # Abbreviation Code
	.byte	17                              # DW_TAG_compile_unit
	.byte	1                               # DW_CHILDREN_yes
	.byte	37                              # DW_AT_producer
	.byte	14                              # DW_FORM_strp
	.byte	19                              # DW_AT_language
	.byte	5                               # DW_FORM_data2
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	16                              # DW_AT_stmt_list
	.byte	23                              # DW_FORM_sec_offset
	.byte	27                              # DW_AT_comp_dir
	.byte	14                              # DW_FORM_strp
	.byte	17                              # DW_AT_low_pc
	.byte	1                               # DW_FORM_addr
	.byte	18                              # DW_AT_high_pc
	.byte	6                               # DW_FORM_data4
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	2                               # Abbreviation Code
	.byte	46                              # DW_TAG_subprogram
	.byte	1                               # DW_CHILDREN_yes
	.byte	17                              # DW_AT_low_pc
	.byte	1                               # DW_FORM_addr
	.byte	18                              # DW_AT_high_pc
	.byte	6                               # DW_FORM_data4
	.byte	64                              # DW_AT_frame_base
	.byte	24                              # DW_FORM_exprloc
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	58                              # DW_AT_decl_file
	.byte	11                              # DW_FORM_data1
	.byte	59                              # DW_AT_decl_line
	.byte	11                              # DW_FORM_data1
	.byte	73                              # DW_AT_type
	.byte	19                              # DW_FORM_ref4
	.byte	63                              # DW_AT_external
	.byte	25                              # DW_FORM_flag_present
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	3                               # Abbreviation Code
	.byte	52                              # DW_TAG_variable
	.byte	0                               # DW_CHILDREN_no
	.byte	2                               # DW_AT_location
	.byte	24                              # DW_FORM_exprloc
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	58                              # DW_AT_decl_file
	.byte	11                              # DW_FORM_data1
	.byte	59                              # DW_AT_decl_line
	.byte	11                              # DW_FORM_data1
	.byte	73                              # DW_AT_type
	.byte	19                              # DW_FORM_ref4
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	4                               # Abbreviation Code
	.byte	36                              # DW_TAG_base_type
	.byte	0                               # DW_CHILDREN_no
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	62                              # DW_AT_encoding
	.byte	11                              # DW_FORM_data1
	.byte	11                              # DW_AT_byte_size
	.byte	11                              # DW_FORM_data1
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	5                               # Abbreviation Code
	.byte	22                              # DW_TAG_typedef
	.byte	0                               # DW_CHILDREN_no
	.byte	73                              # DW_AT_type
	.byte	19                              # DW_FORM_ref4
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	58                              # DW_AT_decl_file
	.byte	11                              # DW_FORM_data1
	.byte	59                              # DW_AT_decl_line
	.byte	11                              # DW_FORM_data1
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	6                               # Abbreviation Code
	.byte	19                              # DW_TAG_structure_type
	.byte	1                               # DW_CHILDREN_yes
	.byte	54                              # DW_AT_calling_convention
	.byte	11                              # DW_FORM_data1
	.byte	11                              # DW_AT_byte_size
	.byte	11                              # DW_FORM_data1
	.byte	58                              # DW_AT_decl_file
	.byte	11                              # DW_FORM_data1
	.byte	59                              # DW_AT_decl_line
	.byte	11                              # DW_FORM_data1
	.byte 	1								# DW_AT_sibling <-- manually added
	.byte 19                          	    # DW_FORM_ref4
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	7                               # Abbreviation Code
	.byte	13                              # DW_TAG_member
	.byte	0                               # DW_CHILDREN_no
	.byte	3                               # DW_AT_name
	.byte	14                              # DW_FORM_strp
	.byte	73                              # DW_AT_type
	.byte	19                              # DW_FORM_ref4
	.byte	58                              # DW_AT_decl_file
	.byte	11                              # DW_FORM_data1
	.byte	59                              # DW_AT_decl_line
	.byte	11                              # DW_FORM_data1
	.byte	56                              # DW_AT_data_member_location
	.byte	11                              # DW_FORM_data1
	.byte	0                               # EOM(1)
	.byte	0                               # EOM(2)
	.byte	0                               # EOM(3)
	.section	.debug_info,"",@progbits
.Lcu_begin0:
	.long	.Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
	.short	4                               # DWARF version number
	.long	.debug_abbrev                   # Offset Into Abbrev. Section
	.byte	8                               # Address Size (in bytes)
	.byte	1                               # Abbrev [1] 0xb:0x7f DW_TAG_compile_unit
	.long	.Linfo_string0                  # DW_AT_producer
	.short	33                              # DW_AT_language
	.long	.Linfo_string1                  # DW_AT_name
	.long	.Lline_table_start0             # DW_AT_stmt_list
	.long	.Linfo_string2                  # DW_AT_comp_dir
	.quad	.Lfunc_begin0                   # DW_AT_low_pc
	.long	.Lfunc_end0-.Lfunc_begin0       # DW_AT_high_pc
	.byte	2                               # Abbrev [2] 0x2a:0x28 DW_TAG_subprogram
	.quad	.Lfunc_begin0                   # DW_AT_low_pc
	.long	.Lfunc_end0-.Lfunc_begin0       # DW_AT_high_pc
	.byte	1                               # DW_AT_frame_base
	.byte	86
	.long	.Linfo_string3                  # DW_AT_name
	.byte	1                               # DW_AT_decl_file
	.byte	7                               # DW_AT_decl_line
	.long	82                              # DW_AT_type
                                        # DW_AT_external
	.byte	3                               # Abbrev [3] 0x43:0xe DW_TAG_variable
	.byte	2                               # DW_AT_location
	.byte	145
	.byte	120
	.long	.Linfo_string5                  # DW_AT_name
	.byte	1                               # DW_AT_decl_file
	.byte	8                               # DW_AT_decl_line
	.long	89                              # DW_AT_type
	.byte	0                               # End Of Children Mark
	.byte	4                               # Abbrev [4] 0x52:0x7 DW_TAG_base_type
	.long	.Linfo_string4                  # DW_AT_name
	.byte	5                               # DW_AT_encoding
	.byte	4                               # DW_AT_byte_size
.Linfo_structured_type:
	.byte	6                               # Abbrev [6] 0x64:0x1e DW_TAG_structure_type
	.byte	5                               # DW_AT_calling_convention
	.byte	8                               # DW_AT_byte_size
	.byte	1                               # DW_AT_decl_file
	.byte	1                               # DW_AT_decl_line
	.long	.Linfo_sibling					# DW_AT_sibling <-- Manually added
.Linfo_sibling:
	.byte	5                               # Abbrev [5] 0x59:0xb DW_TAG_typedef
	.long	.Linfo_structured_type			# DW_AT_type <-- Manually modified
	.long	.Linfo_string9                  # DW_AT_name
	.byte	1                               # DW_AT_decl_file
	.byte	5                               # DW_AT_decl_line
	.byte	7                               # Abbrev [7] 0x69:0xc DW_TAG_member
	.long	.Linfo_string6                  # DW_AT_name
	.long	.Linfo_base_type                # DW_AT_type
	.byte	1                               # DW_AT_decl_file
	.byte	3                               # DW_AT_decl_line
	.byte	0                               # DW_AT_data_member_location
	.byte	7                               # Abbrev [7] 0x75:0xc DW_TAG_member
	.long	.Linfo_string8                  # DW_AT_name
	.long	.Linfo_base_type                # DW_AT_type
	.byte	1                               # DW_AT_decl_file
	.byte	4                               # DW_AT_decl_line
	.byte	4                               # DW_AT_data_member_location
	.byte	0                               # End Of Children Mark
.Linfo_base_type:
	.byte	4                               # Abbrev [4] 0x82:0x7 DW_TAG_base_type
	.long	.Linfo_string7                  # DW_AT_name
	.byte	7                               # DW_AT_encoding
	.byte	4                               # DW_AT_byte_size
	.byte	0                               # End Of Children Mark
.Ldebug_info_end0:
	.section	.debug_str,"MS",@progbits,1
.Linfo_string0:
	.asciz	"clang version 15.0.0" # string offset=0
.Linfo_string1:
	.asciz	"main.cpp"                      # string offset=146
.Linfo_string2:
	.asciz	"/dwarf4-sibling-test" # string offset=155
.Linfo_string3:
	.asciz	"main"                          # string offset=213
.Linfo_string4:
	.asciz	"int"                           # string offset=218
.Linfo_string5:
	.asciz	"s"                             # string offset=222
.Linfo_string6:
	.asciz	"a"                             # string offset=224
.Linfo_string7:
	.asciz	"unsigned int"                  # string offset=226
.Linfo_string8:
	.asciz	"b"                             # string offset=239
.Linfo_string9:
	.asciz	"S"                             # string offset=241
	.ident	"clang version 15.0.0"
	.section	".note.GNU-stack","",@progbits
	.addrsig
	.section	.debug_line,"",@progbits
.Lline_table_start0:
