llvm/test/MC/AArch64/seh-optimize.s

   1 // This test checks that the unwinding opcodes are remapped to more
   2 // efficient ones where possible.
   3
   4 // RUN: llvm-mc -triple aarch64-pc-win32 -filetype=obj %s -o %t.o
   5 // RUN: llvm-readobj -u %t.o | FileCheck %s
   6
   7 // CHECK:      UnwindInformation [
   8 // CHECK-NEXT:   RuntimeFunction {
   9 // CHECK-NEXT:     Function: func
  10 // CHECK-NEXT:     ExceptionRecord: .xdata
  11 // CHECK-NEXT:     ExceptionData {
  12 // CHECK:            Prologue [
  13 // CHECK-NEXT:         0xd882              ; stp d10, d11, [sp, #16]
  14 // CHECK-NEXT:         0xda07              ; stp d8, d9, [sp, #-64]!
  15 // CHECK-NEXT:         0xe6                ; save next
  16 // CHECK-NEXT:         0x28                ; stp x19, x20, [sp, #-64]!
  17 // CHECK-NEXT:         0xca49              ; stp x28, x29, [sp, #72]
  18 // CHECK-NEXT:         0xe6                ; save next
  19 // CHECK-NEXT:         0xe6                ; save next
  20 // CHECK-NEXT:         0xe6                ; save next
  21 // CHECK-NEXT:         0xcc47              ; stp x20, x21, [sp, #-64]!
  22 // CHECK-NEXT:         0x42                ; stp x29, x30, [sp, #16]
  23 // CHECK-NEXT:         0xca02              ; stp x27, x28, [sp, #16]
  24 // CHECK-NEXT:         0x83                ; stp x29, x30, [sp, #-32]!
  25 // CHECK-NEXT:         0xce03              ; stp x27, x28, [sp, #-32]!
  26 // CHECK-NEXT:         0xe1                ; mov fp, sp
  27 // CHECK-NEXT:         0xe201              ; add fp, sp, #8
  28 // CHECK-NEXT:         0xe4                ; end
  29 // CHECK-NEXT:       ]
  30 // CHECK-NEXT:       Epilogue [
  31 // CHECK-NEXT:         0xc904              ; ldp x23, x24, [sp, #32]
  32 // CHECK-NEXT:         0xe6                ; restore next
  33 // CHECK-NEXT:         0xcc83              ; ldp x21, x22, [sp], #32
  34 // CHECK-NEXT:         0x24                ; ldp x19, x20, [sp], #32
  35 // CHECK-NEXT:         0xcc1f              ; ldp x19, x20, [sp], #256
  36 // CHECK-NEXT:         0xe4                ; end
  37 // CHECK-NEXT:       ]
  38 // CHECK-NEXT:     }
  39 // CHECK-NEXT:   }
  40 // CHECK-NEXT: ]
  41
  42
  43     .text
  44     .globl func
  45     .seh_proc func
  46 func:
  47     add x29, sp, #8
  48     .seh_add_fp 8
  49     add x29, sp, #0
  50     .seh_add_fp 0
  51
  52     stp x27, x28, [sp, #-32]!
  53     .seh_save_regp_x x27, 32
  54     stp x29, x30, [sp, #-32]!
  55     .seh_save_regp_x x29, 32
  56
  57     stp x27, x28, [sp, #16]
  58     .seh_save_regp x27, 16
  59     stp x29, x30, [sp, #16]
  60     .seh_save_regp x29, 16
  61
  62     stp x20, x21, [sp, #-64]!
  63     .seh_save_regp_x x20, 64
  64     stp x22, x23, [sp, #16]
  65     .seh_save_regp x22, 16
  66     stp x24, x25, [sp, #32]
  67     .seh_save_next
  68     stp x26, x27, [sp, #48]
  69     .seh_save_regp x26, 48
  70     stp x28, x29, [sp, #72]
  71     .seh_save_regp x28, 72
  72
  73     stp x19, x20, [sp, #-64]!
  74     .seh_save_r19r20_x 64
  75     stp x21, x22, [sp, #16]
  76     .seh_save_regp x21, 16
  77
  78     stp d8,  d9,  [sp, #-64]!
  79     .seh_save_fregp_x d8, 64
  80     stp d10, d11, [sp, #16]
  81     // This is intentionally not converted into a save_next, to avoid
  82     // bugs in the windows unwinder.
  83     .seh_save_fregp d10, 16
  84
  85     .seh_endprologue
  86
  87     nop
  88
  89     .seh_startepilogue
  90     ldp x27, x28, [sp, #32]
  91     .seh_save_regp x23, 32
  92     ldp x23, x24, [sp, #16]
  93     .seh_save_regp x23, 16
  94     ldp x21, x22, [sp], #32
  95     .seh_save_regp_x x21, 32
  96     ldp x19, x20, [sp], #32
  97     .seh_save_regp_x x19, 32
  98     ldp x19, x20, [sp], #256
  99     .seh_save_regp_x x19, 256
 100     .seh_endepilogue
 101     ret
 102     .seh_endproc