File: builtins-folding-gimple-ub.c

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gcc-arm-none-eabi 15%3A14.2.rel1-1
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/* { dg-do compile } */
/* { dg-options "-fpermissive -O1 -fdump-tree-optimized" } */

char *buffer1;
char *buffer2;

#define SIZE 1000

int
main (void)
{
  const char* const foo1 = "hello world";

  /* MEMCHR.  */
  if (__builtin_memchr ("", 'x', 1000)) /* Not folded away.  */
    {
      /* { dg-warning "\\\[-Wstringop-overread" "" { target *-*-* } .-2 } */
      __builtin_abort ();
    }

  if (__builtin_memchr (foo1, 'x', 1000)) /* Not folded away.  */
    {
      /* { dg-warning "\\\[-Wstringop-overread" "" { target *-*-* } .-2 } */
      __builtin_abort ();
    }

  /* STRNCMP.  */
  if (strncmp ("a", "b", -1)) /* { dg-warning "implicit declaration of function" } */
    __builtin_abort ();

  return 0;
}

/* { dg-prune-output "-Wbuiltin-declaration-mismatch" }
   { dg-final { scan-tree-dump-times "__builtin_memchr" 2 "optimized" } } */