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annotate gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-4.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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131
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1 /* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */
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2 /* { dg-require-effective-target vect_double } */
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3 /* { dg-add-options ieee } */
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4 /* { dg-additional-options "-fno-fast-math" } */
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5
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6 #include "tree-vect.h"
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7
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8 #define N (VECTOR_BITS * 17)
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9
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10 double __attribute__ ((noinline, noclone))
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11 reduc_plus_double (double *a)
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12 {
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13 double r1 = 0;
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14 double r2 = 0;
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15 double r3 = 0;
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16 double r4 = 0;
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17 for (int i = 0; i < N; i += 4)
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18 {
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19 r1 += a[i];
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20 r2 += a[i + 1];
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21 r3 += a[i + 2];
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22 r4 += a[i + 3];
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23 }
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24 return r1 * r2 * r3 * r4;
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25 }
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26
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27 int __attribute__ ((optimize (1)))
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28 main ()
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29 {
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30 double a[N];
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31 double r[4] = {};
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32 for (int i = 0; i < N; i++)
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33 {
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34 a[i] = (i * 0.1) * (i & 1 ? 1 : -1);
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35 r[i % 4] += a[i];
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36 asm volatile ("" ::: "memory");
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37 }
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38 double res = reduc_plus_double (a);
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39 if (res != r[0] * r[1] * r[2] * r[3])
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40 __builtin_abort ();
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41 return 0;
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42 }
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43
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44 /* { dg-final { scan-tree-dump {in-order unchained SLP reductions not supported} "vect" } } */
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45 /* { dg-final { scan-tree-dump-not {vectorizing stmts using SLP} "vect" } } */