bolt/test/X86/tail-duplication-prop-bug.s

   1 ## This reproduces a bug in aggressive tail duplication/copy propagation.
   2
   3 # REQUIRES: system-linux
   4 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
   5 # RUN: link_fdata %s %t.o %t.fdata
   6 # RUN: llvm-strip --strip-unneeded %t.o
   7 # RUN: ld.lld %t.o -o %t.exe -q -nostdlib
   8 # RUN: llvm-bolt %t.exe -o %t.out --data %t.fdata --relocs \
   9 # RUN:   --tail-duplication=aggressive \
  10 # RUN:   --tail-duplication-const-copy-propagation=1
  11
  12   .text
  13   .type a, %function
  14   .globl a
  15 a:
  16         .cfi_startproc
  17         jmpq    *JT(,%rcx,8)
  18 b:
  19         jb      d
  20 # FDATA: 1 a #b# 1 a #d# 6 60
  21 e:
  22         cmpl    %eax, %ebx
  23 f:
  24         jmp     g
  25 # FDATA: 1 a #f# 1 a #g# 0 8
  26 d:
  27         movl    $0x1, %ebx
  28         jmp     e
  29         jmp     g
  30 h:
  31         jmp     h
  32 i:
  33         jne     j
  34 g:
  35         jmp     g
  36 j:
  37     ud2
  38         .cfi_endproc
  39 .size a, .-a
  40
  41 .rodata
  42 JT:
  43         .quad   b
  44         .quad   i