Comment # 8 on bug 1059075 from Andreas Schwab

For "char *dir = strdupa (aux_cache_name);" it generates an insn with
unpredictable behavior:

    mov    r0, r5
    bl    strlen(PLT)
    add    r3, r0, #15
    add    r2, r0, #1
    bic    r3, r3, #7
    cmp    r3, #4096
    bcc    .L281
.L320:
    sub    r3, r3, #4096
    sub    sp, sp, #4096
    cmp    r3, #4096
    str    r0, [sp]
    bcs    .L320
.L281:
    sub    sp, sp, r3
    ldr    r1, [fp, #-172]
    mov    r0, sp
    str    r0, [r0], #7  <======
    bic    r0, r0, #7
    bl    memcpy(PLT)

cache.s:2116: Warning: source register same as write-back base