lld/test/ELF/linkerscript/discard-group.s

   1 # REQUIRES: arm
   2 ## For --gc-sections, group members are retained or discarded as a unit.
   3 ## However, discarding a section via /DISCARD/ should not discard other members
   4 ## within the group. This is compatible with GNU ld.
   5
   6 # RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t.o
   7
   8 ## We can discard .ARM.exidx* in a group.
   9 # RUN: echo 'SECTIONS { /DISCARD/ : { *(.ARM.exidx*) }}' > %t.noarm.script
  10 # RUN: ld.lld %t.o --gc-sections -T %t.noarm.script -o %t.noarm
  11 # RUN: llvm-readobj -S %t.noarm | FileCheck %s --check-prefix=NOARM --implicit-check-not='Name: .ARM.exidx'
  12
  13 # NOARM: Name: .text
  14 # NOARM: Name: .note._start
  15
  16 ## Another example, we can discard SHT_NOTE in a group.
  17 # RUN: echo 'SECTIONS { /DISCARD/ : { *(.note*) }}' > %t.nonote.script
  18 # RUN: ld.lld %t.o --gc-sections -T %t.nonote.script -o %t.nonote
  19 # RUN: llvm-readobj -S %t.nonote | FileCheck %s --check-prefix=NONOTE --implicit-check-not='Name: .note'
  20
  21 # NONOTE: Name: .ARM.exidx
  22 # NONOTE: Name: .text
  23
  24 .section .text._start,"axG",%progbits,_start,comdat
  25 .globl _start
  26 _start:
  27 .fnstart
  28 .cantunwind
  29 bx lr
  30 .fnend
  31
  32 .section .note._start,"G",%note,_start,comdat
  33 .byte 0