TheRock/compiler/amd-llvm/llvm/test/tools/llvm-dwarfutil/ELF/X86/odr-backward-ref-addr.test

## This test checks that backward DW_FORM_ref_addr references produce
## correct absolute offsets after ODR deduplication. When both CUs
## define the same type, the duplicate is pruned and references to it
## are redirected to the canonical copy via ref_addr. Since the
## canonical copy is in an earlier (already-emitted) CU, this is a
## backward reference, exercising the DIEEntry emission path.

# RUN: yaml2obj %s -o %t.o
# RUN: llvm-dwarfutil %t.o - | llvm-dwarfdump -a - | FileCheck %s

## CU1:
##
## class Foo {
##   int x;
## };
## Foo var1;
##
## CU2:
##
## class Foo {
##   int x;
## };
## Foo var2;

# CHECK: file format elf64-x86-64
# CHECK: .debug_info contents:

# CHECK: DW_TAG_compile_unit
# CHECK: DW_AT_name{{.*}}"CU1"

# CHECK: 0x[[CU1_FOO:[0-9a-f]*]]: DW_TAG_class_type{{.*[[:space:]].*}}DW_AT_name{{.*}}"Foo"
# CHECK: DW_TAG_member
# CHECK: DW_AT_name{{.*}}"x"

# CHECK: DW_TAG_variable
# CHECK: DW_AT_name{{.*}}"var1"
# CHECK: DW_AT_type{{.*}}0x00000000[[CU1_FOO]] "Foo"

# CHECK: DW_TAG_compile_unit
# CHECK: DW_AT_name{{.*}}"CU2"

# CHECK: DW_TAG_variable
# CHECK: DW_AT_name{{.*}}"var2"
# CHECK: DW_AT_type{{.*}}0x00000000[[CU1_FOO]] "Foo"

--- !ELF
FileHeader:
  Class:    ELFCLASS64
  Data:     ELFDATA2LSB
  Type:     ET_REL
  Machine:  EM_X86_64
Sections:
  - Name:            .text
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    Address:         0x1000
    Size:            0x1b
  - Name:            .text2
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    Address:         0x2000
    Size:            0x1b
DWARF:
  debug_abbrev:
    - Table:
      - Tag:      DW_TAG_compile_unit
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_producer
            Form:      DW_FORM_string
          - Attribute: DW_AT_language
            Form:      DW_FORM_data2
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
          - Attribute: DW_AT_low_pc
            Form:      DW_FORM_addr
          - Attribute: DW_AT_high_pc
            Form:      DW_FORM_data8
      - Tag:      DW_TAG_class_type
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_member
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_type
            Form:      DW_FORM_ref_addr
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_base_type
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_variable
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
          - Attribute: DW_AT_const_value
            Form:      DW_FORM_data4
          - Attribute: DW_AT_type
            Form:      DW_FORM_ref_addr
    - Table:
      - Tag:      DW_TAG_compile_unit
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_producer
            Form:      DW_FORM_string
          - Attribute: DW_AT_language
            Form:      DW_FORM_data2
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
          - Attribute: DW_AT_low_pc
            Form:      DW_FORM_addr
          - Attribute: DW_AT_high_pc
            Form:      DW_FORM_data8
      - Tag:      DW_TAG_class_type
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_member
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_type
            Form:      DW_FORM_ref_addr
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_base_type
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_variable
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
          - Attribute: DW_AT_const_value
            Form:      DW_FORM_data4
          - Attribute: DW_AT_type
            Form:      DW_FORM_ref_addr
  debug_info:
    - Version: 4
      Entries:
        - AbbrCode: 1
          Values:
            - CStr: by_hand
            - Value:  0x04
            - CStr: CU1
            - Value:  0x1000
            - Value:  0x1b
        - AbbrCode: 2
          Values:
            - CStr: Foo
        - AbbrCode: 3
          Values:
            - Value:  0x00000037
            - CStr: x
        - AbbrCode: 0
        - AbbrCode: 4
          Values:
            - CStr: int
        - AbbrCode: 5
          Values:
            - CStr: var1
            - Value:  0x00000000
            - Value:  0x0000002a
        - AbbrCode: 0
    - Version: 4
      Entries:
        - AbbrCode: 1
          Values:
            - CStr: by_hand
            - Value:  0x04
            - CStr: CU2
            - Value:  0x2000
            - Value:  0x1b
        - AbbrCode: 2
          Values:
            - CStr: Foo
        - AbbrCode: 3
          Values:
            - Value:  0x00000082
            - CStr: x
        - AbbrCode: 0
        - AbbrCode: 4
          Values:
            - CStr: int
        - AbbrCode: 5
          Values:
            - CStr: var2
            - Value:  0x00000000
            - Value:  0x00000075
        - AbbrCode: 0
...