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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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/* A test for strength reduction of ivs with nonconstant step. */
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/* A test for strength reduction of ivs with nonconstant step. */
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O1 -fdump-tree-optimized" } */
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/* { dg-options "-O1 -fdump-tree-optimized" } */
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int bar (void);
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int bar (void);
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int a[100];
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int a[100];
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void xxx (void)
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void xxx (void)
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{
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{
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int iter, step = bar ();
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int iter, step = bar ();
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for (iter = 0; iter < 10; iter++)
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for (iter = 0; iter < 10; iter++)
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a[iter * step] = bar ();
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a[iter * step] = bar ();
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}
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}
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/* The array access should be strength reduced. But to determine the value of
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/* The array access should be strength reduced. But to determine the value of
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the step, we need to calculate step * sizeof (int), thus we need to be
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the step, we need to calculate step * sizeof (int), thus we need to be
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a bit careful about which multiplications we disallow. */
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a bit careful about which multiplications we disallow. */
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/* { dg-final { scan-tree-dump-times "step \\* \[^0-9\]" 0 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "step \\* \[^0-9\]" 0 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "\[^0-9\] \\* step" 0 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "\[^0-9\] \\* step" 0 "optimized" } } */
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/* { dg-final { cleanup-tree-dump "optimized" } } */
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/* { dg-final { cleanup-tree-dump "optimized" } } */
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