gdb/testsuite/gdb.perf/template-breakpoints.cc

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright (C) 2018-2020 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <iostream>
  19
  20 template <int I, int J, int K, int VAL>
  21 struct ThirdDimension
  22 {
  23   int
  24   value () const
  25   {
  26     ThirdDimension<I, J, K - 1, VAL> d3;
  27     return d3.value();
  28   }
  29 };
  30
  31 template <int I, int J, int VAL>
  32 struct ThirdDimension<I, J, 0, VAL>
  33 {
  34   int
  35   value () const
  36   {
  37     // Please note - this testcase sets a breakpoint on the following line.
  38     // It is therefore sensitive to line numbers. If any changes are made to
  39     // this file, please ensure that the testcase is updated to reflect this.
  40     std::cout << "Value: " << VAL << std::endl;
  41     return VAL;
  42   }
  43 };
  44
  45 template <int I, int J, int K, int VAL>
  46 struct SecondDimension
  47 {
  48   int
  49   value () const
  50   {
  51     SecondDimension<I, J - 1, K, VAL> d1;
  52     ThirdDimension<I, J, K, VAL> d2;
  53     return d1.value() + d2.value();
  54   }
  55 };
  56
  57 template <int I, int K, int VAL>
  58 struct SecondDimension<I, 0, K, VAL>
  59 {
  60   int
  61   value () const
  62   {
  63     ThirdDimension<I, 0, K, VAL> d2;
  64     return d2.value();
  65   }
  66 };
  67
  68 template <int I, int J, int K, int VAL>
  69 struct FirstDimension
  70 {
  71   int
  72   value () const
  73   {
  74     FirstDimension<I - 1, J, K, VAL> d1;
  75     SecondDimension<I, J, K, VAL> d2;
  76     return d1.value() + d2.value();
  77   }
  78 };
  79
  80 template <int J, int K, int VAL>
  81 struct FirstDimension<0, J, K, VAL>
  82 {
  83   int
  84   value () const
  85   {
  86     SecondDimension<0, J, K, VAL> d2;
  87     return d2.value();
  88   }
  89 };
  90
  91 int
  92 main (int argc, char *argv[])
  93 {
  94   FirstDimension<EXPANSION_DEPTH, EXPANSION_DEPTH, EXPANSION_DEPTH, 1> product;
  95   std::cout << product.value() << std::endl;
  96   return 0;
  97 }