test/MC/Mips/set-at-directive-explicit-at.s

   1 # RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding -mcpu=mips32r2 \
   2 # RUN:     2>%t1 | FileCheck %s
   3 # RUN: FileCheck -check-prefix=WARNINGS %s < %t1
   4
   5 # Check that the assembler can handle the documented syntax for ".set at" and
   6 # will set the correct value for $at.
   7 # Note that writing $at is always the same as writing $1.
   8
   9     .text
  10 foo:
  11 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  12 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $1) without ".set noat"
  13     .set    at=$1
  14     jr    $at
  15
  16 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  17 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $1) without ".set noat"
  18     .set    at=$1
  19     jr    $1
  20
  21 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  22 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $1) without ".set noat"
  23     .set    at=$at
  24     jr    $at
  25
  26 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  27 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $1) without ".set noat"
  28     .set    at=$at
  29     jr    $1
  30
  31 # WARNINGS-NOT: warning: used $at (currently ${{[0-9]+}}) without ".set noat"
  32 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  33     .set    at=$2
  34     jr    $at
  35 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  36     .set    at=$3
  37     jr    $at
  38 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  39     .set noat
  40     jr    $at
  41 # CHECK:   jr    $1                      # encoding: [0x08,0x00,0x20,0x00]
  42     .set at=$0
  43     jr    $at
  44
  45 # CHECK:   jr    $16                     # encoding: [0x08,0x00,0x00,0x02]
  46 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $16) without ".set noat"
  47     .set    at=$16
  48     jr    $s0
  49
  50 # CHECK:   jr    $16                     # encoding: [0x08,0x00,0x00,0x02]
  51 # WARNINGS: :[[@LINE+2]]:11: warning: used $at (currently $16) without ".set noat"
  52     .set    at=$16
  53     jr    $16