1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2013-2020 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/* Note: 'volatile' is used to make sure the compiler doesn't fold /
19   optimize out the arithmetic that uses the variables.  */
20
21static int
22func1 (int a, int b)
23{
24  volatile int r = a * b;
25
26  r += (a | b);
27  r += (a - b);
28
29  return r;
30}
31
32int
33main(void)
34{
35  volatile int a = 0;
36  volatile int b = 1;
37  volatile int c = 2;
38  volatile int d = 3;
39  volatile int e = 4;
40  volatile double d1 = 1.0;
41  volatile double d2 = 2.0;
42
43  /* A macro that expands to a single source line that compiles to a
44     number of instructions, with no branches.  */
45#define LINE_WITH_MULTIPLE_INSTRUCTIONS		\
46  do							\
47    {							\
48      a = b + c + d * e - a;				\
49    } while (0)
50
51  LINE_WITH_MULTIPLE_INSTRUCTIONS; /* location 1 */
52
53  /* A line of source code that compiles to a function call (jump or
54     branch), surrounded by instructions before and after.  IOW, this
55     will generate approximately the following pseudo-instructions:
56
57addr1:
58     insn1;
59     insn2;
60     ...
61     call func1;
62     ...
63     insn3;
64addr2:
65     insn4;
66*/
67  e = 10 + func1 (a + b, c * d); /* location 2 */
68
69  e = 10 + func1 (a + b, c * d);
70
71  /* Generate a single source line that includes a short loop.  */
72#define LINE_WITH_LOOP						\
73  do								\
74    {								\
75      for (a = 0, e = 0; a < 15; a++)				\
76	e += a;							\
77    } while (0)
78
79  LINE_WITH_LOOP;
80
81  LINE_WITH_LOOP;
82
83  /* Generate a single source line that includes a time-consuming
84     loop.  GDB breaks the loop early by clearing variable 'c'.  */
85#define LINE_WITH_TIME_CONSUMING_LOOP					\
86  do									\
87    {									\
88      for (c = 1, a = 0; a < 65535 && c; a++)				\
89	for (b = 0; b < 65535 && c; b++)				\
90	  {								\
91	    d1 = d2 * a / b;						\
92	    d2 = d1 * a;						\
93	  }								\
94    } while (0)
95
96  LINE_WITH_TIME_CONSUMING_LOOP;
97
98  /* Some multi-instruction lines for software watchpoint tests.  */
99  LINE_WITH_MULTIPLE_INSTRUCTIONS;
100  LINE_WITH_MULTIPLE_INSTRUCTIONS; /* soft-watch */
101  LINE_WITH_MULTIPLE_INSTRUCTIONS;
102
103  return 0;
104}
105