bolt/test/X86/Inputs/jump-table-pic.s

   1 # Test case with a simple PIC-style jump table where the register containing
   2 # the jump table address is defined outside of the basic block containing the
   3 # jump on register.
   4 #
   5 # One of the destinations of the jump table points past the end of the function
   6 # similar to the code generated for __builtin_unreachable().
   7
   8         .text
   9         .globl  main
  10         .type   main, @function
  11 main:
  12         .cfi_startproc
  13         pushq   %rbx
  14         .cfi_def_cfa_offset 16
  15         .cfi_offset 3, -16
  16         leaq    .LJUMPTABLE(%rip), %rcx
  17 .L13:
  18         cmpl    $3, %edi
  19         ja      .L2
  20
  21         movslq  (%rcx,%rdi,4), %rax
  22         addq    %rcx, %rax
  23         jmp     *%rax
  24
  25 .L12:
  26         movq    %rdi, %rax
  27         popq    %rbx
  28         .cfi_remember_state
  29         .cfi_def_cfa_offset 8
  30         ret
  31
  32 .L5:
  33         .cfi_restore_state
  34         addq    $9, %rdi
  35         jmp     .L12
  36 .L6:
  37         addq    $8, %rdi
  38         jmp     .L12
  39 .L2:
  40         addq    $2, %rdi
  41         jmp     .L12
  42 .LUNREACHABLE:
  43         .cfi_endproc
  44         .size   main, .-main
  45
  46         .section        .rodata
  47         .align 4
  48 .LJUMPTABLE:
  49         .long   .L2-.LJUMPTABLE
  50         .long   .L6-.LJUMPTABLE
  51         .long   .L5-.LJUMPTABLE
  52         .long   .LUNREACHABLE-.LJUMPTABLE