test/MC/AArch64/jump-table.s

   1 // RUN: llvm-mc < %s -triple=aarch64-none-linux-gnu -filetype=obj | llvm-readobj -r | FileCheck %s
   2 // RUN: llvm-mc < %s -triple=arm64-none-linux-gnu -filetype=obj | llvm-readobj -r | FileCheck %s
   3
   4         .file   "<stdin>"
   5         .text
   6         .globl  test_jumptable
   7         .type   test_jumptable,@function
   8 test_jumptable:                         // @test_jumptable
   9         .cfi_startproc
  10 // BB#0:
  11         ubfx    w1, w0, #0, #32
  12         cmp w0, #4
  13         b.hi .LBB0_3
  14 // BB#1:
  15         adrp    x0, .LJTI0_0
  16         add     x0, x0, #:lo12:.LJTI0_0
  17         ldr     x0, [x0, x1, lsl #3]
  18         br      x0
  19 .LBB0_2:                                // %lbl1
  20         movz    x0, #1
  21         ret
  22 .LBB0_3:                                // %def
  23         mov      x0, xzr
  24         ret
  25 .LBB0_4:                                // %lbl2
  26         movz    x0, #2
  27         ret
  28 .LBB0_5:                                // %lbl3
  29         movz    x0, #4
  30         ret
  31 .LBB0_6:                                // %lbl4
  32         movz    x0, #8
  33         ret
  34 .Ltmp0:
  35         .size   test_jumptable, .Ltmp0-test_jumptable
  36         .cfi_endproc
  37         .section        .rodata,"a",@progbits
  38         .align  3
  39 .LJTI0_0:
  40         .xword  .LBB0_2
  41         .xword  .LBB0_4
  42         .xword  .LBB0_5
  43         .xword  .LBB0_3
  44         .xword  .LBB0_6
  45
  46
  47
  48 // First make sure we get a page/lo12 pair in .text to pick up the jump-table
  49
  50 // CHECK:      Relocations [
  51 // CHECK:        Section ({{[0-9]+}}) .rela.text {
  52 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ADR_PREL_PG_HI21 .rodata
  53 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ADD_ABS_LO12_NC .rodata
  54 // CHECK:        }
  55
  56 // Also check the targets in .rodata are relocated
  57 // CHECK:        Section ({{[0-9]+}}) .rela.rodata {
  58 // CHECK-NEXT:     0x{{[0-9,A-F]+}} R_AARCH64_ABS64 .text
  59 // CHECK:        }
  60 // CHECK:      ]