test/MC/AArch64/jump-table.s

   1 // RUN: llvm-mc < %s -triple=arm64-none-linux-gnu -filetype=obj | llvm-readobj -r | FileCheck %s
   2
   3         .file   "<stdin>"
   4         .text
   5         .globl  test_jumptable
   6         .type   test_jumptable,@function
   7 test_jumptable:                         // @test_jumptable
   8         .cfi_startproc
   9 // BB#0:
  10         ubfx    w1, w0, #0, #32
  11         cmp w0, #4
  12         b.hi .LBB0_3
  13 // BB#1:
  14         adrp    x0, .LJTI0_0
  15         add     x0, x0, #:lo12:.LJTI0_0
  16         ldr     x0, [x0, x1, lsl #3]
  17         br      x0
  18 .LBB0_2:                                // %lbl1
  19         movz    x0, #1
  20         ret
  21 .LBB0_3:                                // %def
  22         mov      x0, xzr
  23         ret
  24 .LBB0_4:                                // %lbl2
  25         movz    x0, #2
  26         ret
  27 .LBB0_5:                                // %lbl3
  28         movz    x0, #4
  29         ret
  30 .LBB0_6:                                // %lbl4
  31         movz    x0, #8
  32         ret
  33 .Ltmp0:
  34         .size   test_jumptable, .Ltmp0-test_jumptable
  35         .cfi_endproc
  36         .section        .rodata,"a",@progbits
  37         .align  3
  38 .LJTI0_0:
  39         .xword  .LBB0_2
  40         .xword  .LBB0_4
  41         .xword  .LBB0_5
  42         .xword  .LBB0_3
  43         .xword  .LBB0_6
  44
  45
  46
  47 // First make sure we get a page/lo12 pair in .text to pick up the jump-table
  48
  49 // CHECK:      Relocations [
  50 // CHECK:        Section ({{[0-9]+}}) .rela.text {
  51 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ADR_PREL_PG_HI21 .rodata
  52 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ADD_ABS_LO12_NC .rodata
  53 // CHECK:        }
  54
  55 // Also check the targets in .rodata are relocated
  56 // CHECK:        Section ({{[0-9]+}}) .rela.rodata {
  57 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ABS64 .text
  58 // CHECK:        }
  59 // CHECK:      ]