| /* { dg-do compile { target i?86-*-* x86_64-*-* } } */ |
| /* { dg-require-effective-target ilp32 } */ |
| /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -msse2 -mfpmath=sse --param simultaneous-prefetches=100 --param max-unrolled-insns=1 -fdump-tree-aprefetch-details -fdump-tree-final_cleanup" } */ |
| |
| #define K 1000000 |
| int a[K], b[K]; |
| |
| void test(int *p) |
| { |
| unsigned i; |
| |
| /* Nontemporal store should be used for a. */ |
| for (i = 0; i < K; i++) |
| a[i] = 0; |
| |
| /* Nontemporal store should be used for a, nontemporal prefetch for b. */ |
| for (i = 0; i < K; i++) |
| a[i] = b[i]; |
| |
| /* Nontemporal store should not be used here (only write and read temporal |
| prefetches). */ |
| for (i = 0; i < K - 10000; i++) |
| a[i + 10000] = a[i]; |
| |
| /* Nontemporal store should not be used here (only write and read nontemporal |
| prefetches). */ |
| for (i = 0; i < K - 100000; i++) |
| a[i + 100000] = a[i]; |
| |
| /* Nontemporal store should be used neither for a nor for p, as we do not know |
| whether they alias or not. */ |
| for (i = 0; i < K; i++) |
| { |
| a[i] = 0; |
| *p++ = 1; |
| } |
| |
| /* Nontemporal store should not be used for a, as we do not know whether its |
| value will be reused or not. */ |
| for (i = 0; i < 1000; i++) |
| a[i] = 0; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "Issued prefetch" 5 "aprefetch" } } */ |
| /* { dg-final { scan-tree-dump-times "Issued nontemporal prefetch" 3 "aprefetch" } } */ |
| /* { dg-final { scan-tree-dump-times "nontemporal store" 2 "aprefetch" } } */ |
| |
| /* { dg-final { scan-tree-dump-times "builtin_prefetch" 8 "final_cleanup" } } */ |
| /* { dg-final { scan-tree-dump-times "=\\{nt\\}" 2 "final_cleanup" } } */ |
| /* { dg-final { scan-tree-dump-times "__builtin_ia32_mfence" 2 "final_cleanup" } } */ |
| |
| /* { dg-final { scan-assembler-times "prefetchw" 5 } } */ |
| /* { dg-final { scan-assembler-times "prefetcht" 1 } } */ |
| /* { dg-final { scan-assembler-times "prefetchnta" 2 } } */ |
| /* { dg-final { scan-assembler-times "movnti" 2 } } */ |
| /* { dg-final { scan-assembler-times "mfence" 2 } } */ |
| |
| /* { dg-final { cleanup-tree-dump "aprefetch" } } */ |
| /* { dg-final { cleanup-tree-dump "final_cleanup" } } */ |