modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/pr52714.c (about)

     1  /* { dg-require-effective-target alloca } */
     2  
     3  int __re_compile_fastmap(unsigned char *p)
     4  {
     5      unsigned char **stack;
     6      unsigned size;
     7      unsigned avail;
     8  
     9      stack = __builtin_alloca(5 * sizeof(unsigned char*));
    10      if (stack == 0)
    11  	return -2;
    12      size = 5;
    13      avail = 0;
    14  
    15      for (;;) {
    16  	switch (*p++) {
    17  	case 0:
    18  	    if (avail == size)
    19  		return -2;
    20  	    stack[avail++] = p;
    21  	}
    22      }
    23  
    24      return 0;
    25  }
    26