gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-27.c

   1 /* PR middle-end/100325 - missing warning with -O0 on sprintf overflow with
   2    pointer plus offset
   3    { dg-do compile }
   4    { dg-options "-O0 -Wall" } */
   5
   6 #define S(n) (&"0123456789"[10 - n])
   7
   8 extern int sprintf (char*, const char*, ...);
   9
  10 char d[10];
  11
  12 void nowarn_d10_s9 ()
  13 {
  14   sprintf (d, "%s", S (9));     // { dg-bogus "-Wformat-overflow" }
  15 }
  16
  17 void warn_d10_s10 ()
  18 {
  19   sprintf (d, "%s", S (10));    // { dg-warning "-Wformat-overflow" }
  20 }