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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [predcom-1.c] - Rev 298
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/* { dg-do compile } */ /* { dg-do run } */ /* { dg-options "-O2 -fpredictive-commoning -fdump-tree-pcom-details" } */ void abort (void); unsigned fib[1000]; __attribute__ ((noinline)) void count_fib(void) { int i; fib[0] = 0; fib[1] = 1; for (i = 2; i < 1000; i++) fib[i] = (fib[i-1] + fib[i - 2]) & 0xffff; } unsigned avg[1000]; __attribute__ ((noinline)) void count_averages(int n) { int i; for (i = 1; i < n; i++) avg[i] = (((unsigned long) fib[i - 1] + fib[i] + fib[i + 1]) / 3) & 0xffff; } int main(void) { count_fib (); count_averages (999); if (fib[19] != 4181 || avg[19] != 4510) abort (); if (fib[999] != 162 || avg[998] != 21953) abort (); return 0; } /* Verify that both loops were transformed and unrolled. */ /* { dg-final { scan-tree-dump-times "Unrolling 2 times." 2 "pcom"} } */ /* Also check that we undid the transformation previously made by PRE. */ /* { dg-final { scan-tree-dump-times "looparound ref" 1 "pcom"} } */ /* { dg-final { cleanup-tree-dump "pcom" } } */
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