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annotate gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-3.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 r = 0;
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14 for (int i = 0; i < N; i += 4)
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15 {
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16 r += a[i] * 2.0;
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17 r += a[i + 1] * 3.0;
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18 r += a[i + 2] * 4.0;
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19 r += a[i + 3] * 5.0;
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20 }
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21 return r;
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22 }
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23
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24 int __attribute__ ((optimize (1)))
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25 main ()
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26 {
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27 double a[N];
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28 double r = 0;
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29 for (int i = 0; i < N; i++)
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30 {
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31 a[i] = (i * 0.1) * (i & 1 ? 1 : -1);
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32 r += a[i] * (i % 4 + 2);
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33 asm volatile ("" ::: "memory");
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34 }
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35 double res = reduc_plus_double (a);
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36 if (res != r)
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37 __builtin_abort ();
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38 return 0;
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39 }
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40
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41 /* { dg-final { scan-tree-dump-times {using an in-order \(fold-left\) reduction} 1 "vect" } } */
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42 /* { dg-final { scan-tree-dump-times {vectorizing stmts using SLP} 1 "vect" } } */