/* A test for strength reduction and induction variable elimination.
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/* A test for strength reduction and induction variable elimination.
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Target is restricted to x86 type architectures, so that we may
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Target is restricted to x86 type architectures, so that we may
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assume something about memory addressing modes. */
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assume something about memory addressing modes. */
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/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && nonpic } } } */
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/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && nonpic } } } */
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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 arr_base[100];
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int arr_base[100];
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int foo(int);
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int foo(int);
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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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long iter;
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long iter;
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for (iter = 0; iter < 100; iter++)
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for (iter = 0; iter < 100; iter++)
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arr_base[iter] = foo (iter);
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arr_base[iter] = foo (iter);
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}
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}
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/* Access to arr_base[iter].y should not be strength reduced, since
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/* Access to arr_base[iter].y should not be strength reduced, since
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we have a memory mode including multiplication by 4. */
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we have a memory mode including multiplication by 4. */
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/* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "step:" 1 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "step:" 1 "optimized" } } */
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/* And original induction variable should be preserved. */
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/* And original induction variable should be preserved. */
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/* { dg-final { scan-tree-dump-times "int iter" 1 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "int iter" 1 "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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