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annotate gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-10.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents
children 1830386684a0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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131
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1 /* { dg-do run } */
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2 /* { dg-options "-O2 -floop-interchange -fdump-tree-linterchange-details" } */
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3 /* { dg-skip-if "too big data segment" { avr-*-* visium-*-* } } */
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4
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5 #define M 256
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6 int a[M][M], b[M][M];
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7 int __attribute__((noinline))
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8 double_reduc (int n)
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9 {
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10 int sum = 0;
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11 for (int j = 0; j < n; j++)
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12 {
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13 for (int i = 0; i < n; i++)
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14 sum = sum + a[i][j]*b[i][j];
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15 }
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16 return sum;
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17 }
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18
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19 extern void abort ();
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20
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21 static void __attribute__((noinline))
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22 init (int i)
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23 {
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24 for (int j = 0; j < M; j++)
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25 {
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26 a[i][j] = i;
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27 b[i][j] = j;
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28 }
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29 }
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30
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31 int main (void)
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32 {
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33 for (int i = 0; i < M; ++i)
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34 init (i);
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35
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36 int sum = double_reduc (M);
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37
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38 if (sum != 1065369600)
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39 abort ();
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40
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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-times "Loop_pair<outer:., inner:.> is interchanged" 1 "linterchange" } } */