gold/testsuite/icf_safe_test.cc

   1 // icf_safe_test.cc -- a test case for gold
   2
   3 // Copyright (C) 2009-2021 Free Software Foundation, Inc.
   4 // Written by Sriraman Tallam <tmsriram@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 // The goal of this program is to verify if identical code folding
  24 // in safe mode correctly folds only ctors and dtors. kept_func_1 must
  25 // not be folded into kept_func_2 other than for X86 (32 and 64 bit)
  26 // which can use relocation types to determine if function pointers are
  27 // taken.  kept_func_3 should never be folded as its pointer is taken.
  28 // The ctor and dtor of class A must be folded.
  29
  30 class A
  31 {
  32   public:
  33     A()
  34     {
  35     }
  36     ~A()
  37     {
  38     }
  39 };
  40
  41 A a;
  42
  43 int kept_func_1()
  44 {
  45   return 1;
  46 }
  47
  48 int kept_func_2()
  49 {
  50   return 1;
  51 }
  52
  53 int kept_func_3()
  54 {
  55   return 1;
  56 }
  57
  58 int main()
  59 {
  60   int (*p)() = kept_func_3;
  61   p();
  62   return 0;
  63 }