1 /* { dg-do compile } */ 2 /* { dg-options "-O2" } */ 3 4 #include <errno.h> 5 #include <stdlib.h> 6 main()7int main() 8 { 9 void * volatile p; 10 errno = 0; 11 p = malloc (-1); 12 if (errno != 0) 13 do_not_optimize_away (); 14 return 0; 15 } 16 17 /* { dg-final { scan-assembler "do_not_optimize_away" } } */ 18