test/MC/X86/cfi_def_cfa-crash.s

   1 // RUN: llvm-mc -triple x86_64-apple-darwin -filetype=obj %s -o - | llvm-readobj --sections | FileCheck %s
   2
   3 // We were trying to generate compact unwind info for assembly like this.
   4 // The .cfi_def_cfa directive, however, throws a wrench into that and was
   5 // causing an llvm_unreachable() failure. Make sure the assembler can handle
   6 // the input. The actual eh_frames created using these directives are checked
   7 // elsewhere. This test is a simpler "does the code assemble" check.
   8
   9 // rdar://15406518
  10
  11 .macro SaveRegisters
  12
  13  push %rbp
  14  .cfi_def_cfa_offset 16
  15  .cfi_offset rbp, -16
  16
  17  mov %rsp, %rbp
  18  .cfi_def_cfa_register rbp
  19
  20  sub $$0x80+8, %rsp
  21
  22  movdqa %xmm0, -0x80(%rbp)
  23  push %rax
  24  movdqa %xmm1, -0x70(%rbp)
  25  push %rdi
  26  movdqa %xmm2, -0x60(%rbp)
  27  push %rsi
  28  movdqa %xmm3, -0x50(%rbp)
  29  push %rdx
  30  movdqa %xmm4, -0x40(%rbp)
  31  push %rcx
  32  movdqa %xmm5, -0x30(%rbp)
  33  push %r8
  34  movdqa %xmm6, -0x20(%rbp)
  35  push %r9
  36  movdqa %xmm7, -0x10(%rbp)
  37
  38 .endmacro
  39 .macro RestoreRegisters
  40
  41  movdqa -0x80(%rbp), %xmm0
  42  pop %r9
  43  movdqa -0x70(%rbp), %xmm1
  44  pop %r8
  45  movdqa -0x60(%rbp), %xmm2
  46  pop %rcx
  47  movdqa -0x50(%rbp), %xmm3
  48  pop %rdx
  49  movdqa -0x40(%rbp), %xmm4
  50  pop %rsi
  51  movdqa -0x30(%rbp), %xmm5
  52  pop %rdi
  53  movdqa -0x20(%rbp), %xmm6
  54  pop %rax
  55  movdqa -0x10(%rbp), %xmm7
  56
  57  leave
  58  .cfi_def_cfa rsp, 8
  59  .cfi_same_value rbp
  60
  61 .endmacro
  62
  63 _foo:
  64 .cfi_startproc
  65   SaveRegisters
  66
  67   RestoreRegisters
  68   ret
  69  .cfi_endproc
  70
  71 // CHECK: Section {
  72 // CHECK:   Index: 1
  73 // CHECK:   Name: __eh_frame (5F 5F 65 68 5F 66 72 61 6D 65 00 00 00 00 00 00)
  74 // CHECK:   Segment: __TEXT (5F 5F 54 45 58 54 00 00 00 00 00 00 00 00 00 00)
  75 // CHECK:   Address: 0x70
  76 // CHECK:   Size: 0x40
  77 // CHECK:   Offset: 480
  78 // CHECK:   Alignment: 3
  79 // CHECK:   RelocationOffset: 0x0
  80 // CHECK:   RelocationCount: 0
  81 // CHECK:   Type: 0xB
  82 // CHECK:   Attributes [ (0x680000)
  83 // CHECK:     LiveSupport (0x80000)
  84 // CHECK:     NoTOC (0x400000)
  85 // CHECK:     StripStaticSyms (0x200000)
  86 // CHECK:   ]
  87 // CHECK:   Reserved1: 0x0
  88 // CHECK:   Reserved2: 0x0
  89 // CHECK: }