| /* { dg-do run } */ | |
| /* { dg-require-effective-target clzl } */ | |
| /* { dg-options "-O2 -fdump-tree-optimized" } */ | |
| #define PREC (__CHAR_BIT__ * __SIZEOF_LONG__) | |
| int | |
| __attribute__ ((noinline, noclone)) | |
| foo (unsigned long b) { | |
| int c = 0; | |
| while (b) { | |
| b >>= 1; | |
| c++; | |
| } | |
| return c; | |
| } | |
| int main() | |
| { | |
| if (foo(0) != 0) | |
| __builtin_abort (); | |
| if (foo(5) != 3) | |
| __builtin_abort (); | |
| if (foo(1L << (PREC - 1)) != PREC) | |
| __builtin_abort (); | |
| return 0; | |
| } | |
| /* { dg-final { scan-tree-dump-times "__builtin_clz|\\.CLZ" 1 "optimized" } } */ |