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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [loop-4.c] - Rev 816
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/* A test for strength reduction and induction variable elimination. */ /* { dg-do compile } */ /* { dg-options "-O1 -fdump-tree-optimized" } */ /* { dg-require-effective-target size32plus } */ /* Size of this structure should be sufficiently weird so that no memory addressing mode applies. */ struct bla { char x[187]; int y; char z[253]; } arr_base[100]; int foo(void); void xxx(void) { int iter; for (iter = 0; iter < 100; iter++) arr_base[iter].y = foo (); } /* Access to arr_base[iter].y should be strength reduced. Depending on whether we have an addressing mode of type [base + offset], one of the following forms might get chosen: -- induction variable with base &arr_base[0].y, the memory access of form *iv = ... -- induction variable with base 0, the memory access of form *(iv + &arr_base[0].y) = ... In any case, we should not have any multiplication. */ /* { dg-final { scan-tree-dump-times " \\* \[^\\n\\r\]*=" 0 "optimized" } } */ /* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */ /* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */ /* And the original induction variable should be eliminated. */ /* { dg-final { scan-tree-dump-times "iter" 0 "optimized" } } */ /* { dg-final { cleanup-tree-dump "optimized" } } */
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