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/* PR17544 Incorrect -Wunreachable-code warning

   Origin: sebor@roguewave.com

   G++ appends a "return 0;" when finishing a function, but it was not

   given a source location.  The gimplifier thinks a return statement

   needs a locus so it would add one, making the compiler generated code

   visible to the unreachable code warning.  */

/* { dg-do compile } */

/* { dg-options "-O -Wunreachable-code" } */

int

main (int argc, char *argv[])

{

  const char* const s = argc < 2 ? "" : argv [1];

  int i = 0;

  do {

    ++i;

  } while (i < s [0]);

  return i;

}