lld/test/COFF/gc-dwarf.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -triple=x86_64-windows-msvc %s -filetype=obj -o %t.obj
   4 # RUN: lld-link -lldmap:%t.map -out:%t.exe -opt:ref -entry:main %t.obj -verbose 2>&1 | FileCheck %s
   5 # RUN: FileCheck %s --check-prefix=MAP --input-file=%t.map
   6
   7 # CHECK:      Discarded unused1
   8 # CHECK-NEXT: Discarded unused2
   9 # CHECK-NOT: Discarded
  10
  11 # MAP: In Symbol
  12 # MAP: gc-dwarf.s.tmp.obj:(.text)
  13 # MAP: {{ main$}}
  14 # MAP: gc-dwarf.s.tmp.obj:(.text)
  15 # MAP: {{ used$}}
  16
  17         .def     @feat.00; .scl 3; .type        0; .endef
  18         .globl  @feat.00
  19 .set @feat.00, 0
  20
  21         .def     main; .scl     2; .type        32; .endef
  22         .section        .text,"xr",one_only,main
  23         .globl  main
  24 main:
  25         callq used
  26         xorl    %eax, %eax
  27         retq
  28
  29         .def     used; .scl     2; .type        32; .endef
  30         .section        .text,"xr",one_only,used
  31         .globl  used
  32 used:
  33         retq
  34
  35
  36         .def     unused1; .scl  2; .type        32; .endef
  37         .section        .text,"xr",one_only,unused1
  38         .globl  unused1
  39 unused1:
  40         retq
  41
  42         .def     unused2; .scl  2; .type        32; .endef
  43         .section        .text,"xr",one_only,unused2
  44         .globl  unused2
  45 unused2:
  46         retq
  47
  48 # This isn't valid DWARF, but LLD doesn't care. Make up some data that
  49 # references the functions above.
  50 .section .debug_info,"r"
  51 .long main@IMGREL
  52 .long unused1@IMGREL
  53 .long unused2@IMGREL
  54
  55 # Similarly, .eh_frame unwind info should not keep functions alive. Again, this
  56 # is not valid unwind info, but it doesn't matter for testing purposes.
  57 .section .eh_frame,"r"
  58 .long main@IMGREL
  59 .long unused1@IMGREL
  60 .long unused2@IMGREL