lld/test/ELF/aarch64-cortex-a53-843419-tlsrelax.s

   1 // REQUIRES: aarch64
   2 // RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
   3 // RUN: ld.lld -fix-cortex-a53-843419 %t.o -o %t2
   4 // RUN: llvm-objdump --no-print-imm-hex --triple=aarch64-linux-gnu -d %t2 | FileCheck %s
   5
   6 // The following code sequence is covered by the TLS IE to LE relaxation. It
   7 // transforms the ADRP, LDR to MOVZ, MOVK. The former can trigger a
   8 // cortex-a53-843419 patch, whereas the latter can not. As both
   9 // relaxation and patching transform instructions very late in the
  10 // link there is a possibility of them both being simultaneously
  11 // applied. In this case the relaxed sequence is immune from the erratum so we
  12 // prefer to keep it.
  13  .text
  14  .balign 4096
  15  .space  4096 - 8
  16  .globl _start
  17  .type  _start,@function
  18 _start:
  19  mrs    x1, tpidr_el0
  20  adrp   x0, :gottprel:v
  21  ldr    x1, [x0, #:gottprel_lo12:v]
  22  adrp   x0, :gottprel:v
  23  ldr    x1, [x0, #:gottprel_lo12:v]
  24  ret
  25
  26 // CHECK: <_start>:
  27 // CHECK-NEXT:   211ff8:        d53bd041        mrs     x1, TPIDR_EL0
  28 // CHECK-NEXT:   211ffc:        d2a00000        movz    x0, #0, lsl #16
  29 // CHECK-NEXT:   212000:        f2800201        movk    x1, #16
  30 // CHECK-NEXT:   212004:        d2a00000        movz    x0, #0, lsl #16
  31 // CHECK-NEXT:   212008:        f2800201        movk    x1, #16
  32 // CHECK-NEXT:   21200c:        d65f03c0        ret
  33
  34  .type  v,@object
  35  .section       .tbss,"awT",@nobits
  36  .globl v
  37 v:
  38  .word 0