lld/test/ELF/icf-keep-unique.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 --icf=all --print-icf-sections | FileCheck %s
   5 # RUN: ld.lld %t -o %t2 --keep-unique f2 --keep-unique f4 --keep-unique f5 --icf=all --print-icf-sections 2>&1 | FileCheck %s -check-prefix=CHECK-KEEP
   6
   7 // Base case, expect only .text.f1 to be kept
   8 // CHECK: selected section {{.*}}:(.text.f1)
   9 // CHECK-NEXT:   removing identical section {{.*}}:(.text.f2)
  10 // CHECK-NEXT:   removing identical section {{.*}}:(.text.f3)
  11 // CHECK-NEXT:   removing identical section {{.*}}:(.text.f4)
  12 // CHECK-NEXT:   removing identical section {{.*}}:(.text.f5)
  13
  14 // With --keep-unique f2, f4 and f5 we expect only f3 and f5 to be removed.
  15 // f5 is not matched by --keep-unique as it is a local symbol.
  16 // CHECK-KEEP: warning: could not find symbol f5 to keep unique
  17 // CHECK-KEEP: selected section {{.*}}:(.text.f1)
  18 // CHECK-KEEP-NEXT:   removing identical section {{.*}}:(.text.f3)
  19 // CHECK-KEEP-NEXT:   removing identical section {{.*}}:(.text.f5)
  20  .globl _start, f1, f2, f3, f4
  21 _start:
  22  ret
  23
  24  .section .text.f1, "ax"
  25 f1:
  26  nop
  27
  28  .section .text.f2, "ax"
  29 f2:
  30  nop
  31
  32 .section .text.f3, "ax"
  33 f3:
  34  nop
  35
  36 .section .text.f4, "ax"
  37 f4:
  38  nop
  39
  40 # f5 is local, not found by --keep-unique f5
  41 .section .text.f5, "ax"
  42 f5:
  43  nop