gcc/testsuite/gcc.dg/Wvla-larger-than-5.c

   1 /* PR middle-end/100510 - bogus -Wvla-large-than with -Walloca
   2    { dg-do compile }
   3    { dg-options "-O0 -Walloca -Wvla-larger-than=1000" }
   4    { dg-require-effective-target alloca } */
   5
   6 void f (void*);
   7
   8 #pragma GCC optimize ("0")
   9
  10 void nowarn_O0 (__SIZE_TYPE__ n)
  11 {
  12   if (n > 32)
  13     return;
  14
  15   char a[n];                  // { dg-bogus "\\\[-Wvla-larger-than=" }
  16   f (a);
  17 }
  18
  19 #pragma GCC optimize ("1")
  20
  21 void nowarn_O1 (__SIZE_TYPE__ n)
  22 {
  23   if (n > 33)
  24     return;
  25
  26   char a[n];                  // { dg-bogus "\\\[-Wvla-larger-than=" }
  27   f (a);
  28 }
  29
  30 #pragma GCC optimize ("2")
  31
  32 void nowarn_O2 (__SIZE_TYPE__ n)
  33 {
  34   if (n > 34)
  35     return;
  36
  37   char a[n];                  // { dg-bogus "\\\[-Wvla-larger-than=" }
  38   f (a);
  39 }