| // REQUIRES: arm |
| // RUN: llvm-mc -filetype=obj -triple=arm-none-linux-gnueabi %s -o %t |
| // RUN: ld.lld %t -o /dev/null 2>&1 | FileCheck %s |
| |
| // On Arm v6 the range of a Thumb BL instruction is only 4 megabytes as the |
| // extended range encoding is not supported. The following example has a Thumb |
| // BL that is out of range on ARM v6 and requires a range extension thunk. |
| // As v6 does not support MOVT or MOVW instructions the Thunk must not |
| // use these instructions either. At present we don't support v6 so we give a |
| // warning for unsupported features. |
| |
| // CHECK: warning: lld uses extended branch encoding, no object with architecture supporting feature detected. |
| // CHECK-NEXT: warning: lld may use movt/movw, no object with architecture supporting feature detected. |
| // ARM v6 supports blx so we shouldn't see the blx not supported warning. |
| // CHECK-NOT: warning: lld uses blx instruction, no object with architecture supporting feature detected. |
| .text |
| .syntax unified |
| .cpu arm1176jzf-s |
| .eabi_attribute 6, 6 @ Tag_CPU_arch |
| .globl _start |
| .type _start,%function |
| .balign 0x1000 |
| _start: |
| bl thumbfunc |
| bx lr |
| |
| .thumb |
| .section .text.2, "ax", %progbits |
| .globl thumbfunc |
| .type thumbfunc,%function |
| thumbfunc: |
| bl farthumbfunc |
| |
| // 6 Megabytes, enough to make farthumbfunc out of range of caller on a v6 |
| // Arm, but not on a v7 Arm. |
| .section .text.3, "ax", %progbits |
| .space 0x200000 |
| |
| .section .text.4, "ax", %progbits |
| .space 0x200000 |
| |
| .section .text.5, "ax", %progbits |
| .space 0x200000 |
| |
| .thumb |
| .section .text.6, "ax", %progbits |
| .balign 0x1000 |
| .globl farthumbfunc |
| .type farthumbfunc,%function |
| farthumbfunc: |
| bx lr |
