Viewing file:  vect-over-widen-18.c (1.45 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
/* { dg-require-effective-target vect_shift } */
/* { dg-require-effective-target vect_pack_trunc } */
/* { dg-require-effective-target vect_unpack } */
#include "tree-vect.h"
#define N 1024
/* This should be treated as an over-widening pattern: we can truncate
b to unsigned char after loading it and do all the computation in
unsigned char. */
void __attribute__ ((noipa))
f (unsigned char *restrict a, unsigned short *restrict b)
{
for (__INTPTR_TYPE__ i = 0; i < N; ++i)
{
unsigned short foo = ((b[i] & 0xef) | 0x80) + (a[i] << 4);
a[i] = foo;
}
}
int
main (void)
{
check_vect ();
unsigned char a[N];
unsigned short b[N];
for (int i = 0; i < N; ++i)
{
a[i] = i;
b[i] = i * 3;
asm volatile ("" ::: "memory");
}
f (a, b);
for (int i = 0; i < N; ++i)
if (a[i] != (unsigned char) ((((i * 3) & 0xef) | 0x80) + (i << 4)))
__builtin_abort ();
return 0;
}
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* &} "vect" } } */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* |} "vect" } } */
/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* <<} "vect" } } */
/* { dg-final { scan-tree-dump {vector[^\n]*char} "vect" } } */
/* { dg-final { scan-tree-dump-not {vector[^ ]* int} "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" } } */
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