summaryrefslogtreecommitdiffstats
path: root/llvm/test/MC/ARM/misaligned-blx.s
blob: f9250bf535ba6280351dae5b29b4918bcda05e06 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
@ RUN: not llvm-mc -triple thumbv7-apple-ios -filetype=obj %s -o /dev/null 2>&1 | FileCheck %s
        @ Size: 2 bytes
        .thumb_func _f1
        .thumb
        .globl _f1
_f1:
        bx lr

        @ A misaligned ARM destination.
        .arm
        .globl _misaligned
_misaligned:
        bx lr

        @ And a properly aligned one.
        .globl _aligned
        .p2align 2
        .arm
_aligned:
        bx lr

        @ Align this Thumb function so we can predict the outcome of
        @ "Align(PC, 4)" during blx operation.
        .thumb_func _test
        .thumb
        .p2align 2
        .globl _test
_test:
        blx _misaligned       @ PC=0 (mod 4)
        movs r0, r0
        blx _misaligned       @ PC=2 (mod 4)
        movs r0, r0
        blx _aligned          @ PC=0 (mod 4)
        movs r0, r0
        blx _aligned          @ PC=2 (mod 4)

@ CHECK: error: misaligned ARM call destination
@ CHECK:   blx _misaligned
@ CHECK: error: misaligned ARM call destination
@ CHECK:   blx _misaligned
OpenPOWER on IntegriCloud