bolt/test/X86/tail-duplication-complex.s

   1 # REQUIRES: system-linux
   2
   3 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
   4 # RUN:   %s -o %t.o
   5 # RUN: link_fdata %s %t.o %t.fdata
   6 # RUN: %clang %cflags %t.o -o %t.exe -Wl,-q
   7
   8 # RUN: llvm-bolt %t.exe --data %t.fdata --print-finalized \
   9 # RUN:    --tail-duplication=moderate --tail-duplication-minimum-offset=1 \
  10 # RUN:    -o %t.out | FileCheck %s
  11
  12 # FDATA: 1 main f 1 main 19 0 10
  13 # FDATA: 1 main f 1 main 11 0 13
  14 # FDATA: 1 main 17 1 main 3c 0 10
  15 # FDATA: 1 main 39 1 main 3c 0 10
  16
  17 # CHECK: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks ({{.*}} bytes) responsible for {{.*}} dynamic executions ({{.*}} of all block executions)
  18 # CHECK: BB Layout   : .LBB00, .Ltmp0, .Ltail-dup0, .Ltmp1, .Ltmp2
  19
  20 # This is the C++ code fed to Clang
  21 # int fib(int term) {
  22 #   if (term <= 1)
  23 #     return term;
  24 #   return fib(term-1) + fib(term-2);
  25 # }
  26
  27     .text
  28     .globl main
  29     .type main, %function
  30     .size main, .Lend-main
  31 main:
  32     push   %rbp
  33     mov    %rsp,%rbp
  34     sub    $0x10,%rsp
  35     mov    %edi,-0x8(%rbp)
  36     cmpl   $0x1,-0x8(%rbp)
  37     jg     .BB1
  38 .BB0:
  39     mov    -0x8(%rbp),%eax
  40     mov    %eax,-0x4(%rbp)
  41     jmp   .BB2
  42 .BB1:
  43     mov    -0x8(%rbp),%edi
  44     sub    $0x1,%edi
  45     call   main
  46     mov    %eax,-0xc(%rbp)
  47     mov    -0x8(%rbp),%edi
  48     sub    $0x2,%edi
  49     call   main
  50     mov    %eax,%ecx
  51     mov    -0xc(%rbp),%eax
  52     add    %ecx,%eax
  53     mov    %eax,-0x4(%rbp)
  54 .BB2:
  55     mov    -0x4(%rbp),%eax
  56     add    $0x10,%rsp
  57     pop    %rbp
  58     retq
  59     nopl   0x0(%rax)
  60 .Lend: