gcc/testsuite/gcc.dg/Walloca-larger-than-4.c

/* PR middle-end/100425 - missing -Walloca-larger-than with -O0
   { dg-do compile }
   { dg-options "-O0 -Wall -Walloca-larger-than=128" } */

typedef __SIZE_TYPE__ size_t;

void* alloca (size_t);

void sink (void*);

void warn_alloca_too_large (void)
{
  sink (alloca (1));
  sink (alloca (128));
  sink (alloca (129));        // { dg-warning "\\\[-Walloca-larger-than" }
  sink (alloca (128 + 2));    // { dg-warning "\\\[-Walloca-larger-than" }
  sink (alloca (1024));       // { dg-warning "\\\[-Walloca-larger-than" }
}