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jeremybenn |
/* { dg-require-effective-target vect_int } */
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#include <stdarg.h>
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#include "tree-vect.h"
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#define N 32
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unsigned short sa[N];
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unsigned short sc[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
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16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
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unsigned short sb[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
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16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
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unsigned int ia[N];
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unsigned int ic[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,
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0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
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unsigned int ib[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,
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0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
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/* Current peeling-for-alignment scheme will consider the 'sa[i+7]'
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access for peeling, and therefore will examine the option of
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using a peeling factor = VF-7%VF. This will result in a peeling factor 1,
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which will also align the access to 'ia[i+3]', and the loop could be
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vectorized on all targets that support unaligned loads.
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Without cost model on targets that support misaligned stores, no peeling
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will be applied since we want to keep the four loads aligned. */
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__attribute__ ((noinline))
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int main1 (int n)
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{
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int i;
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/* Multiple types with different sizes, used in independent
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copmutations. Vectorizable. */
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for (i = 0; i < n; i++)
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{
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sa[i+7] = sb[i] + sc[i];
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ia[i+3] = ib[i] + ic[i];
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}
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/* check results: */
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for (i = 0; i < n; i++)
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{
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if (sa[i+7] != sb[i] + sc[i] || ia[i+3] != ib[i] + ic[i])
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abort ();
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}
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return 0;
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}
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/* Current peeling-for-alignment scheme will consider the 'ia[i+3]'
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access for peeling, and therefore will examine the option of
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using a peeling factor = VF-3%VF. This will result in a peeling factor
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1 if VF=4,2. This will not align the access to 'sa[i+3]', for which we
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need to peel 5,1 iterations for VF=4,2 respectively, so the loop can not
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be vectorized. However, 'ia[i+3]' also gets aligned if we peel 5
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iterations, so the loop is vectorizable on all targets that support
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unaligned loads.
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Without cost model on targets that support misaligned stores, no peeling
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will be applied since we want to keep the four loads aligned. */
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__attribute__ ((noinline))
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int main2 (int n)
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{
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int i;
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/* Multiple types with different sizes, used in independent
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copmutations. Vectorizable. */
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for (i = 0; i < n; i++)
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{
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ia[i+3] = ib[i] + ic[i];
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sa[i+3] = sb[i] + sc[i];
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}
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/* check results: */
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for (i = 0; i < n; i++)
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{
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if (sa[i+3] != sb[i] + sc[i] || ia[i+3] != ib[i] + ic[i])
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abort ();
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}
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return 0;
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}
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int main (void)
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{
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check_vect ();
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main1 (N-7);
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main2 (N-3);
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return 0;
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}
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/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail { vect_no_align } } } } */
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/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" { target { vect_element_align} } } } */
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/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 2 "vect" { xfail { vect_no_align || vect_element_align } } } } */
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/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 8 "vect" { xfail { vect_no_align || vect_element_align } } } } */
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/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 4 "vect" { target { vect_element_align } } } } */
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/* { dg-final { cleanup-tree-dump "vect" } } */
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