lld/test/ELF/relocatable-discard-locals.s

   1 # REQUIRES: x86
   2 ## Test that -r keeps local symbols which are used in relocations even when
   3 ## --discard-{locals,all} is given.
   4
   5 # RUN: llvm-mc -filetype=obj -triple=x86_64 -save-temp-labels %s -o %t.o
   6
   7 # RUN: ld.lld -r --discard-locals %t.o -o %tlocal.ro
   8 # RUN: llvm-readelf -s %tlocal.ro | FileCheck --check-prefix=DISCARD-LOCALS %s
   9 # RUN: llvm-readobj -r %tlocal.ro | FileCheck --check-prefix=REL %s
  10
  11 # RUN: ld.lld -r --discard-all %t.o -o %tall.ro
  12 # RUN: llvm-readelf -s %tall.ro | FileCheck --check-prefix=DISCARD-ALL %s
  13 # RUN: llvm-readobj -r %tall.ro | FileCheck --check-prefix=REL %s
  14
  15 ## --discard-locals removes unused local symbols which start with ".L"
  16 # DISCARD-LOCALS:    0: {{0+}} 0 NOTYPE  LOCAL  DEFAULT UND
  17 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} .Lused
  18 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} used
  19 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} .L.str
  20 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} unused
  21 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} unused_gc
  22 # DISCARD-LOCALS-NEXT:           SECTION LOCAL  DEFAULT {{.*}} .text
  23 # DISCARD-LOCALS-NEXT:           SECTION LOCAL  DEFAULT {{.*}} text
  24 # DISCARD-LOCALS-NEXT:           SECTION LOCAL  DEFAULT {{.*}} gc
  25 # DISCARD-LOCALS-NEXT:           SECTION LOCAL  DEFAULT {{.*}} .rodata.str1.1
  26 # DISCARD-LOCALS-NEXT:           NOTYPE  GLOBAL DEFAULT {{.*}} _start
  27
  28 ## --discard-all removes all unused regular local symbols.
  29 # DISCARD-ALL:    0: {{0+}} 0 NOTYPE  LOCAL  DEFAULT UND
  30 # DISCARD-ALL-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} .Lused
  31 # DISCARD-ALL-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} used
  32 # DISCARD-ALL-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} .L.str
  33 # DISCARD-ALL-NEXT:           SECTION LOCAL  DEFAULT {{.*}} .text
  34 # DISCARD-ALL-NEXT:           SECTION LOCAL  DEFAULT {{.*}} text
  35 # DISCARD-ALL-NEXT:           SECTION LOCAL  DEFAULT {{.*}} gc
  36 # DISCARD-ALL-NEXT:           SECTION LOCAL  DEFAULT {{.*}} .rodata.str1.1
  37 # DISCARD-ALL-NEXT:           NOTYPE  GLOBAL DEFAULT {{.*}} _start
  38
  39 # REL:      .rela.text {
  40 # REL-NEXT:   R_X86_64_PLT32 text 0xFFFFFFFFFFFFFFFC
  41 # REL-NEXT:   R_X86_64_PLT32 .Lused 0xFFFFFFFFFFFFFFFC
  42 # REL-NEXT:   R_X86_64_PLT32 used 0xFFFFFFFFFFFFFFFC
  43 # REL-NEXT:   R_X86_64_PC32 .L.str 0xFFFFFFFFFFFFFFFC
  44 # REL-NEXT: }
  45
  46 .globl _start
  47 _start:
  48   call text@plt
  49   jmp .Lused@plt
  50   call used@plt
  51   leaq .L.str(%rip), %rdi
  52
  53 .section text,"ax"
  54 .Lunused:
  55 .Lused:
  56 unused:
  57 used:
  58
  59 .section gc,"ax"
  60 .Lunused_gc:
  61 unused_gc:
  62   ret
  63
  64 .section .rodata.str1.1,"aMS",@progbits,1
  65 .L.str: .asciz "a"