lld/test/ELF/gc-sections.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
   4 # RUN: ld.lld %t -o %t2
   5 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=NOGC %s
   6 # RUN: ld.lld --gc-sections --print-gc-sections %t -o %t2 | FileCheck --check-prefix=GC1-DISCARD %s
   7 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=GC1 %s
   8 # RUN: ld.lld --export-dynamic --gc-sections %t -o %t2
   9 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=GC2 %s
  10
  11 # NOGC: Name: .eh_frame
  12 # NOGC: Name: .text
  13 # NOGC: Name: .init
  14 # NOGC: Name: .init_x
  15 # NOGC: Name: .fini
  16 # NOGC: Name: .tdata
  17 # NOGC: Name: .tbss
  18 # NOGC: Name: .ctors
  19 # NOGC: Name: .dtors
  20 # NOGC: Name: .fini_array
  21 # NOGC: Name: .init_array
  22 # NOGC: Name: .preinit_array
  23 # NOGC: Name: .jcr
  24 # NOGC: Name: .jcr_x
  25 # NOGC: Name: .debug_pubtypes
  26 # NOGC: Name: .comment
  27 # NOGC: Name: a
  28 # NOGC: Name: b
  29 # NOGC: Name: c
  30 # NOGC: Name: e
  31 # NOGC: Name: f
  32 # NOGC: Name: g
  33 # NOGC: Name: h
  34 # NOGC: Name: x
  35 # NOGC: Name: y
  36 # NOGC: Name: d
  37
  38 # GC1-DISCARD:      removing unused section {{.*}}:(.text.d)
  39 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.text.x)
  40 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.text.y)
  41 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.tbss.f)
  42 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.tdata.h)
  43 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.init_x)
  44 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.jcr_x)
  45 # GC1-DISCARD-EMPTY:
  46
  47 # GC1:     Name: .eh_frame
  48 # GC1:     Name: .text
  49 # GC1:     Name: .init
  50 # GC1:     Name: .fini
  51 # GC1:     Name: .tdata
  52 # GC1:     Name: .tbss
  53 # GC1:     Name: .ctors
  54 # GC1:     Name: .dtors
  55 # GC1:     Name: .fini_array
  56 # GC1:     Name: .init_array
  57 # GC1:     Name: .preinit_array
  58 # GC1:     Name: .jcr
  59 # GC1:     Name: .debug_pubtypes
  60 # GC1:     Name: .comment
  61 # GC1:     Name: a
  62 # GC1:     Name: b
  63 # GC1:     Name: c
  64 # GC1:     Name: e
  65 # GC1-NOT: Name: f
  66 # GC1:     Name: g
  67 # GC1-NOT: Name: h
  68 # GC1-NOT: Name: x
  69 # GC1-NOT: Name: y
  70 # GC1-NOT: Name: d
  71
  72 # GC2:     Name: .eh_frame
  73 # GC2:     Name: .text
  74 # GC2:     Name: .init
  75 # GC2:     Name: .fini
  76 # GC2:     Name: .tdata
  77 # GC2:     Name: .tbss
  78 # GC2:     Name: .ctors
  79 # GC2:     Name: .dtors
  80 # GC2:     Name: .fini_array
  81 # GC2:     Name: .init_array
  82 # GC2:     Name: .preinit_array
  83 # GC2:     Name: .jcr
  84 # GC2:     Name: .debug_pubtypes
  85 # GC2:     Name: .comment
  86 # GC2:     Name: a
  87 # GC2:     Name: b
  88 # GC2:     Name: c
  89 # GC2:     Name: e
  90 # GC2-NOT: Name: f
  91 # GC2:     Name: g
  92 # GC2-NOT: Name: h
  93 # GC2-NOT: Name: x
  94 # GC2-NOT: Name: y
  95 # GC2:     Name: d
  96
  97 .globl _start, d
  98 .protected a, b, c, e, f, g, h, x, y
  99 _start:
 100   call a
 101
 102 .section .text.a,"ax",@progbits
 103 a:
 104   call _start
 105   call b
 106
 107 .section .text.b,"ax",@progbits
 108 b:
 109   leaq e@tpoff(%rax),%rdx
 110   call c
 111
 112 .section .text.c,"ax",@progbits
 113 c:
 114   leaq g@tpoff(%rax),%rdx
 115
 116 .section .text.d,"ax",@progbits
 117 d:
 118   nop
 119
 120 .section .text.x,"ax",@progbits
 121 x:
 122   call y
 123
 124 .section .text.y,"ax",@progbits
 125 y:
 126   call x
 127
 128 .section .tbss.e,"awT",@nobits
 129 e:
 130   .quad 0
 131
 132 .section .tbss.f,"awT",@nobits
 133 f:
 134   .quad 0
 135
 136 .section .tdata.g,"awT",@progbits
 137 g:
 138   .quad 0
 139
 140 .section .tdata.h,"awT",@progbits
 141 h:
 142   .quad 0
 143
 144 .section .ctors,"aw",@progbits
 145   .quad 0
 146
 147 .section .dtors,"aw",@progbits
 148   .quad 0
 149
 150 .section .init,"ax"
 151   .quad 0
 152
 153 .section .init_x,"ax"
 154   .quad 0
 155
 156 .section .fini,"ax"
 157   .quad 0
 158
 159 .section .fini_array,"aw",@fini_array
 160   .quad 0
 161
 162 # https://golang.org/cl/373734
 163 .section .init_array,"aw",@progbits
 164   .quad 0
 165
 166 # Work around https://github.com/rust-lang/rust/issues/92181
 167 .section .init_array.00001,"aw",@progbits
 168   .quad 0
 169
 170 .section .preinit_array,"aw",@preinit_array
 171   .quad 0
 172
 173 .section .jcr,"aw"
 174   .quad 0
 175
 176 .section .jcr_x,"aw"
 177   .quad 0
 178
 179 .section .eh_frame,"a",@unwind
 180   .quad 0
 181
 182 .section .debug_pubtypes,"",@progbits
 183   .quad 0
 184
 185 .section .comment,"MS",@progbits,8
 186   .quad 0