gcc/testsuite/c-c++-common/ubsan/pr112727.c

/* PR sanitizer/112727 */
/* { dg-do compile } */
/* { dg-options "-O2 -fsanitize=shift-exponent,bounds-strict -Wuninitialized" } */

#ifndef __cplusplus
#define bool _Bool
#endif

struct S { bool s[8]; };

void
foo (const struct S *x)
{
  unsigned n = 0;
  for (unsigned j = 0; j < 8; j++)
    n |= ((!x->s[j]) ? 1 : 0) << (16 + j);
}