lld/test/ELF/discard-locals.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64 -save-temp-labels %s -o %t.o
   3
   4 # RUN: ld.lld --discard-locals %t.o -o %tlocal
   5 # RUN: llvm-readelf -s %tlocal | FileCheck --check-prefixes=DISCARD-LOCALS,DISCARD-LOCALS-NOGC %s
   6
   7 ## --gc-sections can discard symbols relative to GCed sections (including STT_SECTION).
   8 # RUN: ld.lld --discard-locals --gc-sections %t.o -o %tlocal.gc
   9 # RUN: llvm-readelf -s %tlocal.gc | FileCheck --check-prefix=DISCARD-LOCALS %s
  10
  11 # RUN: ld.lld --discard-all %t.o -o %tall
  12 # RUN: llvm-readelf -s %tall | FileCheck --check-prefix=DISCARD-ALL %s
  13
  14 # RUN: ld.lld --discard-all --gc-sections %t.o -o %tall.gc
  15 # RUN: llvm-readelf -s %tall.gc | FileCheck --check-prefix=DISCARD-ALL %s
  16
  17 ## --discard-locals removes local symbols which start with ".L"
  18 # DISCARD-LOCALS:    0: {{0+}} 0 NOTYPE  LOCAL  DEFAULT UND
  19 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} used
  20 # DISCARD-LOCALS-NEXT:           NOTYPE  LOCAL  DEFAULT {{.*}} unused
  21 # DISCARD-LOCALS-NOGC-NEXT:      NOTYPE  LOCAL  DEFAULT {{.*}} unused_gc
  22 # DISCARD-LOCALS-NEXT:           NOTYPE  GLOBAL DEFAULT {{.*}} _start
  23
  24 ## --discard-all removes all regular local symbols.
  25 # DISCARD-ALL:       0: {{0+}} 0 NOTYPE  LOCAL  DEFAULT UND
  26 # DISCARD-ALL-NEXT:              NOTYPE  GLOBAL DEFAULT {{.*}} _start
  27
  28 .globl _start
  29 _start:
  30   call text@plt
  31   jmp .Lused@plt
  32   call used@plt
  33
  34 .section text,"ax"
  35 .Lunused:
  36 .Lused:
  37 unused:
  38 used:
  39
  40 .section gc,"ax"
  41 .Lunused_gc:
  42 unused_gc:
  43   ret