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TheRock/compiler/amd-llvm/lld/test/ELF/aarch64-cortex-a53-843419-tlsrelax.s
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

39 lines
1.4 KiB
ArmAsm

// REQUIRES: aarch64
// RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t.o
// RUN: ld.lld -fix-cortex-a53-843419 %t.o -o %t2
// RUN: llvm-objdump --no-print-imm-hex --triple=aarch64-linux-gnu -d %t2 | FileCheck %s
// The following code sequence is covered by the TLS IE to LE relaxation. It
// transforms the ADRP, LDR to MOVZ, MOVK. The former can trigger a
// cortex-a53-843419 patch, whereas the latter can not. As both
// relaxation and patching transform instructions very late in the
// link there is a possibility of them both being simultaneously
// applied. In this case the relaxed sequence is immune from the erratum so we
// prefer to keep it.
.text
.balign 4096
.space 4096 - 8
.globl _start
.type _start,@function
_start:
mrs x1, tpidr_el0
adrp x0, :gottprel:v
ldr x1, [x0, #:gottprel_lo12:v]
adrp x0, :gottprel:v
ldr x1, [x0, #:gottprel_lo12:v]
ret
// CHECK: <_start>:
// CHECK-NEXT: 211ff8: d53bd041 mrs x1, TPIDR_EL0
// CHECK-NEXT: 211ffc: d2a00000 movz x0, #0, lsl #16
// CHECK-NEXT: 212000: f2800201 movk x1, #16
// CHECK-NEXT: 212004: d2a00000 movz x0, #0, lsl #16
// CHECK-NEXT: 212008: f2800201 movk x1, #16
// CHECK-NEXT: 21200c: d65f03c0 ret
.type v,@object
.section .tbss,"awT",@nobits
.globl v
v:
.word 0