bolt/test/AArch64/tailcall_traps.s

   1 ## Tests the peephole that adds trap instructions following indirect tail calls.
   2
   3 # RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
   4 # RUN:   %s -o %t.o
   5 # RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
   6 # RUN: llvm-bolt %t.exe -o %t.bolt --peepholes=tailcall-traps \
   7 # RUN:   --print-peepholes --funcs=foo,bar 2>&1 | FileCheck %s
   8
   9 # CHECK:  Binary Function "foo"
  10 # CHECK:        br     x0  # TAILCALL
  11 # CHECK-NEXT:   brk    #0x1
  12 # CHECK:  End of Function "foo"
  13
  14 # CHECK:  Binary Function "bar"
  15 # CHECK:        b     foo # TAILCALL
  16 # CHECK:  End of Function "bar"
  17
  18   .text
  19   .align 4
  20   .global _start
  21   .type _start, %function
  22 _start:
  23   nop
  24   ret
  25   .size _start, .-_start
  26
  27   .global foo
  28   .type foo, %function
  29 foo:
  30   br x0
  31   .size foo, .-foo
  32
  33   .global bar
  34   .type bar, %function
  35 bar:
  36   b foo
  37   .size bar, .-bar