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 -pie --export-dynamic --gc-sections %t -o %t2
   9 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=GC2 %s
  10
  11 ## In non-pie static linking, --export-dynamic currently retains the global 'd' even if it is not exported.
  12 # RUN: ld.lld --export-dynamic --gc-sections --print-gc-sections %t -o %t1
  13 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=GC2 %s
  14
  15 # RUN: llvm-mc -filetype=obj -triple=x86_64 --crel %s -o %t.o
  16 # RUN: ld.lld -pie --gc-sections --print-gc-sections %t.o -o %t2 | FileCheck --check-prefix=GC1-DISCARD %s
  17 # RUN: llvm-readobj --sections --symbols %t2 | FileCheck -check-prefix=GC1 %s
  18
  19 # NOGC: Name: .eh_frame
  20 # NOGC: Name: .text
  21 # NOGC: Name: .init
  22 # NOGC: Name: .init_x
  23 # NOGC: Name: .fini
  24 # NOGC: Name: .tdata
  25 # NOGC: Name: .tbss
  26 # NOGC: Name: .ctors
  27 # NOGC: Name: .dtors
  28 # NOGC: Name: .fini_array
  29 # NOGC: Name: .init_array
  30 # NOGC: Name: .preinit_array
  31 # NOGC: Name: .jcr
  32 # NOGC: Name: .jcr_x
  33 # NOGC: Name: .debug_pubtypes
  34 # NOGC: Name: .comment
  35 # NOGC: Name: a
  36 # NOGC: Name: b
  37 # NOGC: Name: c
  38 # NOGC: Name: e
  39 # NOGC: Name: f
  40 # NOGC: Name: g
  41 # NOGC: Name: h
  42 # NOGC: Name: x
  43 # NOGC: Name: y
  44 # NOGC: Name: d
  45
  46 # GC1-DISCARD:      removing unused section {{.*}}:(.text.d)
  47 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.text.x)
  48 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.text.y)
  49 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.tbss.f)
  50 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.tdata.h)
  51 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.init_x)
  52 # GC1-DISCARD-NEXT: removing unused section {{.*}}:(.jcr_x)
  53 # GC1-DISCARD-EMPTY:
  54
  55 # GC1:     Name: .eh_frame
  56 # GC1:     Name: .text
  57 # GC1:     Name: .init
  58 # GC1:     Name: .fini
  59 # GC1:     Name: .tdata
  60 # GC1:     Name: .tbss
  61 # GC1:     Name: .ctors
  62 # GC1:     Name: .dtors
  63 # GC1:     Name: .fini_array
  64 # GC1:     Name: .init_array
  65 # GC1:     Name: .preinit_array
  66 # GC1:     Name: .jcr
  67 # GC1:     Name: .debug_pubtypes
  68 # GC1:     Name: .comment
  69 # GC1:     Name: a
  70 # GC1:     Name: b
  71 # GC1:     Name: c
  72 # GC1:     Name: e
  73 # GC1-NOT: Name: f
  74 # GC1:     Name: g
  75 # GC1-NOT: Name: h
  76 # GC1-NOT: Name: x
  77 # GC1-NOT: Name: y
  78 # GC1-NOT: Name: d
  79
  80 # GC2:     Name: .eh_frame
  81 # GC2:     Name: .text
  82 # GC2:     Name: .init
  83 # GC2:     Name: .fini
  84 # GC2:     Name: .tdata
  85 # GC2:     Name: .tbss
  86 # GC2:     Name: .ctors
  87 # GC2:     Name: .dtors
  88 # GC2:     Name: .fini_array
  89 # GC2:     Name: .init_array
  90 # GC2:     Name: .preinit_array
  91 # GC2:     Name: .jcr
  92 # GC2:     Name: .debug_pubtypes
  93 # GC2:     Name: .comment
  94 # GC2:     Name: a
  95 # GC2:     Name: b
  96 # GC2:     Name: c
  97 # GC2:     Name: e
  98 # GC2-NOT: Name: f
  99 # GC2:     Name: g
 100 # GC2-NOT: Name: h
 101 # GC2-NOT: Name: x
 102 # GC2-NOT: Name: y
 103 # GC2:     Name: d
 104
 105 .globl _start, d
 106 .protected a, b, c, e, f, g, h, x, y
 107 _start:
 108   call a
 109
 110 .section .text.a,"ax",@progbits
 111 a:
 112   call _start
 113   call b
 114
 115 .section .text.b,"ax",@progbits
 116 b:
 117   leaq e@tpoff(%rax),%rdx
 118   call c
 119
 120 .section .text.c,"ax",@progbits
 121 c:
 122   leaq g@tpoff(%rax),%rdx
 123
 124 .section .text.d,"ax",@progbits
 125 d:
 126   nop
 127
 128 .section .text.x,"ax",@progbits
 129 x:
 130   call y
 131
 132 .section .text.y,"ax",@progbits
 133 y:
 134   call x
 135
 136 .section .tbss.e,"awT",@nobits
 137 e:
 138   .quad 0
 139
 140 .section .tbss.f,"awT",@nobits
 141 f:
 142   .quad 0
 143
 144 .section .tdata.g,"awT",@progbits
 145 g:
 146   .quad 0
 147
 148 .section .tdata.h,"awT",@progbits
 149 h:
 150   .quad 0
 151
 152 .section .ctors,"aw",@progbits
 153   .quad 0
 154
 155 .section .dtors,"aw",@progbits
 156   .quad 0
 157
 158 .section .init,"ax"
 159   .quad 0
 160
 161 .section .init_x,"ax"
 162   .quad 0
 163
 164 .section .fini,"ax"
 165   .quad 0
 166
 167 .section .fini_array,"aw",@fini_array
 168   .quad 0
 169
 170 # https://golang.org/cl/373734
 171 .section .init_array,"aw",@progbits
 172   .quad 0
 173
 174 # Work around https://github.com/rust-lang/rust/issues/92181
 175 .section .init_array.00001,"aw",@progbits
 176   .quad 0
 177
 178 .section .preinit_array,"aw",@preinit_array
 179   .quad 0
 180
 181 .section .jcr,"aw"
 182   .quad 0
 183
 184 .section .jcr_x,"aw"
 185   .quad 0
 186
 187 .section .eh_frame,"a",@unwind
 188   .quad 0
 189
 190 .section .debug_pubtypes,"",@progbits
 191   .quad 0
 192
 193 .section .comment,"MS",@progbits,8
 194   .quad 0