Verify that llvm-ar uses COFF archive format by ensuring that archive map is sorted.

RUN: rm -rf %t.dir && split-file %s %t.dir && cd %t.dir

RUN: yaml2obj coff-symtab.yaml -o coff-symtab.obj
RUN: llvm-ar crs out.a coff-symtab.obj
RUN: llvm-nm --print-armap out.a | FileCheck %s

RUN: llvm-as coff-symtab.ll -o coff-symtab.bc
RUN: llvm-ar crs out2.a coff-symtab.bc
RUN: llvm-nm --print-armap out2.a | FileCheck %s

RUN: yaml2obj elf.yaml -o coff-symtab.o
RUN: llvm-ar crs --format coff out3.a coff-symtab.o
RUN: llvm-nm --print-armap out3.a | FileCheck %s

Create an empty archive with no symbol map, add a COFF file to it and check that the output archive is a COFF archive.

RUN: llvm-ar --format coff rcS out4.a
RUN: llvm-ar rs out4.a coff-symtab.obj
RUN: llvm-nm --print-armap out4.a | FileCheck %s

CHECK: Archive map
CHECK-NEXT: a in coff-symtab
CHECK-NEXT: b in coff-symtab
CHECK-NEXT: c in coff-symtab
CHECK-EMPTY:

#--- coff-symtab.yaml
--- !COFF
header:
  Machine:           IMAGE_FILE_MACHINE_UNKNOWN
  Characteristics:   [  ]
sections:
  - Name:            .text
    Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
    Alignment:       4
    SectionData:     ''
symbols:
  - Name:            b
    Value:           0
    SectionNumber:   1
    SimpleType:      IMAGE_SYM_TYPE_NULL
    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
  - Name:            c
    Value:           0
    SectionNumber:   1
    SimpleType:      IMAGE_SYM_TYPE_NULL
    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
  - Name:            a
    Value:           0
    SectionNumber:   1
    SimpleType:      IMAGE_SYM_TYPE_NULL
    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
...


#--- coff-symtab.ll
target triple = "x86_64-unknown-windows-msvc"

define void @b() { ret void }
define void @c() { ret void }
define void @a() { ret void }

#--- elf.yaml
--- !ELF
FileHeader:
  Class:             ELFCLASS64
  Data  :            ELFDATA2LSB
  Type:              ET_REL
  Machine:           EM_X86_64
Sections:
  - Name:            .text
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
    AddressAlign:    0x0000000000000004
    Content:         ''
Symbols:
  - Name:            b
    Binding:         STB_GLOBAL
    Section:         .text
  - Name:            c
    Binding:         STB_GLOBAL
    Section:         .text
  - Name:            a
    Binding:         STB_GLOBAL
    Section:         .text
...