| /* { dg-do run } */ |
| /* { dg-options "-O2 -ftree-pre -fno-tree-loop-im -fgcse-sm -fdump-rtl-store_motion" } */ |
| |
| /* tree-pre moves the *sum load out of the loop. ftree-loop-im moves the *sum |
| store out of the loop, so we disable it, to allow fgcse-sm to do it |
| instead. */ |
| |
| #include <stdlib.h> |
| |
| void __attribute__((noinline)) |
| f (unsigned int *__restrict__ a, unsigned int *__restrict__ sum, unsigned int n) |
| { |
| unsigned int i; |
| for (i = 0; i < n; ++i) |
| *sum += a[i]; |
| } |
| |
| int |
| main () |
| { |
| unsigned int a[] = { 1, 10, 100 }; |
| unsigned sum = 1000; |
| |
| f (a, &sum, 3); |
| if (sum != 1111) |
| abort (); |
| |
| return 0; |
| } |
| |
| /* Check that -fgcse-sm did something for f. */ |
| /* { dg-final { scan-rtl-dump "STORE_MOTION of f, .* basic blocks, 1 insns deleted, 1 insns created" "store_motion" } } */ |
| |
