# RUN: rm -rf %t.dir && mkdir -p %t.dir
# RUN: yaml2obj %s -o %t.dir/pack.o
# RUN: dsymutil --linker classic -y %p/Inputs/dwarflinker-template-parameter-pack.map -oso-prepend-path=%t.dir -f -o - | llvm-dwarfdump -a - | FileCheck %s
# RUN: dsymutil --linker parallel -y %p/Inputs/dwarflinker-template-parameter-pack.map -oso-prepend-path=%t.dir -f -o - | llvm-dwarfdump -a - | FileCheck %s

## A DW_TAG_GNU_template_parameter_pack with three identical
## DW_TAG_template_type_parameter children (all referring to the same
## int base type) must be preserved as three separate child DIEs after
## linking. Before the parallel linker registered the pack tag with
## SyntheticTypeNameBuilder, pack children received no ordered synthetic
## key and TypePool deduplicated the three siblings down to one.

# CHECK:      DW_TAG_structure_type
# CHECK:        DW_AT_name {{.*}}"Pack"
# CHECK:        DW_TAG_GNU_template_parameter_pack
# CHECK:          DW_AT_name {{.*}}"Ts"
# CHECK:          DW_TAG_template_type_parameter
# CHECK:            DW_AT_type {{.*}}"int"
# CHECK:          DW_TAG_template_type_parameter
# CHECK:            DW_AT_type {{.*}}"int"
# CHECK:          DW_TAG_template_type_parameter
# CHECK:            DW_AT_type {{.*}}"int"
# CHECK-NOT:        DW_TAG_template_type_parameter

--- !mach-o
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        segname:   __DWARF
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DWARF:
  debug_abbrev:
    - Table:
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        Attributes:
          - Attribute: DW_AT_producer
            Form:      DW_FORM_string
          - Attribute: DW_AT_language
            Form:      DW_FORM_data2
      - Tag:      DW_TAG_structure_type
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_GNU_template_parameter_pack
        Children: DW_CHILDREN_yes
        Attributes:
          - Attribute: DW_AT_name
            Form:      DW_FORM_string
      - Tag:      DW_TAG_template_type_parameter
        Children: DW_CHILDREN_no
        Attributes:
          - Attribute: DW_AT_type
            Form:      DW_FORM_ref_addr
      - 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:
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            Form:      DW_FORM_string
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            Form:      DW_FORM_data4
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            Form:      DW_FORM_ref_addr
  debug_info:
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      Entries:
        ## 0x0b: DW_TAG_compile_unit
        - AbbrCode: 1
          Values:
            - CStr: by_hand
            - Value: 0x04
        ## 0x16: DW_TAG_structure_type "Pack"
        - AbbrCode: 2
          Values:
            - CStr: Pack
        ## 0x1c: DW_TAG_GNU_template_parameter_pack "Ts"
        - AbbrCode: 3
          Values:
            - CStr: Ts
        ## 0x20: DW_TAG_template_type_parameter -> int
        - AbbrCode: 4
          Values:
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        ## 0x25: DW_TAG_template_type_parameter -> int
        - AbbrCode: 4
          Values:
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        ## 0x2a: DW_TAG_template_type_parameter -> int
        - AbbrCode: 4
          Values:
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        ## 0x30: NULL (close structure)
        - AbbrCode: 0
        ## 0x31: DW_TAG_base_type "int"
        - AbbrCode: 5
          Values:
            - CStr: int
        ## 0x36: DW_TAG_variable "var" -> Pack
        - AbbrCode: 6
          Values:
            - CStr: var
            - Value: 0x000000ff
            - Value: 0x00000016
        ## 0x43: NULL (close CU)
        - AbbrCode: 0
...