Viewing file:  vect-over-widen-2.c (1.69 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
/* { dg-require-effective-target vect_shift } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 64
/* Modified rgb to rgb conversion from FFmpeg. */
__attribute__ ((noinline)) void
foo (unsigned char *src, unsigned char *dst)
{
unsigned char *s = src;
int *d = (int *)dst;
int i;
for (i = 0; i < N/4; i++)
{
const int b = *s++;
const int g = *s++;
const int r = *s++;
const int a = *s++;
*d = ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5));
d++;
}
s = src;
d = (int *)dst;
for (i = 0; i < N/4; i++)
{
const int b = *s++;
const int g = *s++;
const int r = *s++;
const int a = *s++;
if (*d != ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5)))
abort ();
d++;
}
}
int main (void)
{
int i;
unsigned char in[N], out[N];
check_vect ();
for (i = 0; i < N; i++)
{
in[i] = i;
out[i] = 255;
__asm__ volatile ("");
}
foo (in, out);
return 0;
}
/* This is an over-widening even though the final result is still an int.
It's better to do one vector of ops on chars and then widen than to
widen and then do 4 vectors of ops on ints. */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* << 3} "vect" } } */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 3} "vect" } } */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* << 8} "vect" } } */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 5} "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
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