File: pr23455.c

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gcc-arm-none-eabi 15%3A8-2019-q3-1
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/* { dg-do compile } */ 
/* { dg-options "-O2 -fdump-tree-pre-stats" } */
#ifdef _WIN64
#define LONG long long
#else
#define LONG long
#endif

unsigned LONG outcnt;
extern void flush_outbuf(void);

void
bi_windup(unsigned int *outbuf, unsigned int bi_buf)
{
    unsigned LONG t1 = outcnt;
    outbuf[t1] = bi_buf;

    unsigned LONG t2 = outcnt;
    if (t2 == 16384)
      flush_outbuf();

    unsigned LONG t3 = outcnt;
    outbuf[t3] = bi_buf;
}
/* We should eliminate one load of outcnt, which will in turn let us eliminate
   one multiply of outcnt which will in turn let us eliminate
   one add involving outcnt and outbuf.  */
/* { dg-final { scan-tree-dump-times "Eliminated: 3" 1 "pre" {target { ! avr-*-* } } } } */
/* { dg-final { scan-tree-dump-times "Eliminated: 4" 1 "pre" {target {   avr-*-* } } } } */