File: pr78768.c

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gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
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/* PR c/78768 - -Walloca-larger-than and -Wformat-overflow warnings disabled
   by -flto
  { dg-do link }
  { dg-require-effective-target lto }
  { dg-require-linker-plugin "" }
  { dg-options "-O2 -Walloca-larger-than=10 -Wformat -Wformat-overflow -flto" } */

int main (void)
{
  char *d = (char *)__builtin_alloca (12);  /* { dg-warning "argument to .alloca. is too large" } */

  __builtin_sprintf (d, "%32s", "x");   /* { dg-warning "directive writing 32 bytes into a region of size 12" "-Wformat-overflow" } */

  return 0;
}