| /* { dg-do compile } */ |
| |
| /* { dg-options "-O2 -fdump-tree-vrp1-details" } */ |
| |
| |
| typedef const struct bitmap_head_def *const_bitmap; |
| typedef unsigned long BITMAP_WORD; |
| typedef struct bitmap_element_def { |
| struct bitmap_element_def *next; |
| BITMAP_WORD bits[((128 + (8 * 8 * 1u) - 1) / (8 * 8 * 1u))]; |
| } bitmap_element; |
| typedef struct bitmap_head_def { |
| bitmap_element *first; |
| } bitmap_head; |
| unsigned char |
| bitmap_single_bit_set_p (const_bitmap a) |
| { |
| unsigned long count = 0; |
| const bitmap_element *elt; |
| unsigned ix; |
| if ((!(a)->first)) |
| return 0; |
| elt = a->first; |
| if (elt->next != ((void *)0)) |
| return 0; |
| for (ix = 0; ix != ((128 + (8 * 8 * 1u) - 1) / (8 * 8 * 1u)); ix++) |
| { |
| count += __builtin_popcountl (elt->bits[ix]); |
| if (count > 1) |
| return 0; |
| } |
| return count == 1; |
| } |
| |
| /* Verify that VRP simplified an "if" statement. */ |
| /* { dg-final { scan-tree-dump "Folded into: if.*" "vrp1"} } */ |
| |
| |
