1  /* PR middle-end/82063 - issues with arguments enabled by -Wall
       2     Verify that alloca() calls in loops are not diagnosed by default.
       3     { dg-do compile }
       4     { dg-require-effective-target alloca }
       5     { dg-options "-O2 -ftrack-macro-expansion=0" } */
       6  
       7  extern void* alloca (__SIZE_TYPE__);
       8  
       9  void sink (void*);
      10  
      11  #define T(x) sink (x)
      12  
      13  void test_alloca (unsigned n)
      14  {
      15    /* Verify that alloca(0) is not diagnosed in a loop either.  */
      16    for (unsigned i = 0; i < n; ++i)
      17      T (alloca (0));
      18  
      19    /* Verify no warnings for the loops below.  */
      20    for (unsigned i = 0; i < n; ++i)
      21      T (alloca (1));
      22  
      23    for (unsigned i = 1; i < n; ++i)
      24      T (alloca (n));
      25  }