| /* PR tree-optimization/94800 */ |
| /* { dg-do compile { target int32plus } } */ |
| /* { dg-require-effective-target popcountl } */ |
| /* { dg-options "-O2 -fdump-tree-optimized" } */ |
| |
| #if __SIZEOF_LONG__ == 4 |
| const unsigned long m1 = 0x55555555UL; |
| const unsigned long m2 = 0x33333333UL; |
| const unsigned long m4 = 0x0F0F0F0FUL; |
| const int shift = 24; |
| #else |
| const unsigned long m1 = 0x5555555555555555UL; |
| const unsigned long m2 = 0x3333333333333333UL; |
| const unsigned long m4 = 0x0f0f0f0f0f0f0f0fUL; |
| const int shift = 56; |
| #endif |
| |
| |
| int popcount64c(unsigned long x) |
| { |
| x -= (x >> 1) & m1; |
| x = (x & m2) + ((x >> 2) & m2); |
| x = (x + (x >> 4)) & m4; |
| x += (x << 8); |
| x += (x << 16); |
| #if __SIZEOF_LONG__ != 4 |
| x += (x << 32); |
| #endif |
| return x >> shift; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" } } */ |
