1 /* Copyright (C) 2008-2020 Free Software Foundation, Inc. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; either version 3 of the License, or 6 (at your option) any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 /* This is only ever run if it is compiled with a new-enough GCC, but 17 we don't want the compilation to fail if compiled by some other 18 compiler. */ 19 #ifdef __GNUC__ 20 #define ATTR __attribute__((always_inline)) 21 #else 22 #define ATTR 23 #endif 24 25 int x, y; 26 volatile int z = 0; 27 volatile int result; 28 volatile int *array_p; 29 30 void bar(void); 31 32 void 33 init_array (int *array, int n) 34 { 35 int i; 36 for (i = 0; i < n; ++i) 37 array[i] = 0; 38 } 39 40 inline ATTR int func1(int arg1) 41 { 42 int array[64]; 43 init_array (array, 64); 44 array_p = array; 45 array[0] = result; 46 array[1] = arg1; 47 bar (); 48 return x * y + array_p[0] * arg1; 49 } 50 51 inline ATTR int func2(int arg2) 52 { 53 return x * func1 (arg2); 54 } 55 56 int main (void) 57 { 58 int val; 59 60 x = 7; 61 y = 8; 62 bar (); 63 64 val = func1 (result); 65 result = val; 66 67 val = func2 (result); 68 result = val; 69 70 return 0; 71 } 72