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/* { dg-do compile } */
/* { dg-options "-fgcse -fgcse-sm" } */
 
typedef struct A {
    int buf, left;
} A;
 
static void flush(A *s, int n)
{
    s->buf <<= n;
 
    while (s->left < 32) {
        s->buf <<= 8;
        s->left += 8;
    }
 
    s->buf=0;
}
 
void oof(A *s, int n)
{
    s->buf = n;
    s->left = n;
 
    flush(s, n);
}