gcc/testsuite/gcc.dg/c99-const-expr-13.c

   1 /* Test for constant expressions: VLA size constraints with
   2    -frounding-math.  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4 /* { dg-do compile } */
   5 /* { dg-options "-std=iso9899:1999 -pedantic-errors -frounding-math" } */
   6 /* { dg-require-effective-target alloca } */
   7
   8 void
   9 f (void)
  10 {
  11   /* With -frounding-math, presume that floating-point expressions
  12      that may depend on the rounding mode do not count as arithmetic
  13      constant expressions, and so arrays involving such expressions in
  14      their sizes do not have the size checked for being negative.  */
  15   int a1[(int)(-5.0/3.0)];
  16 }