| /* PR target/78103 */ |
| /* { dg-do compile } */ |
| /* { dg-options "-O2 -mno-lzcnt" } */ |
| /* { dg-final { scan-assembler-not {\mmovl\M} } } */ |
| /* { dg-final { scan-assembler-not {\mxor[lq]\M} } } */ |
| /* { dg-final { scan-assembler-not {\msubl\M} } } */ |
| /* { dg-final { scan-assembler {\m(leal|addl|incl)\M} } } */ |
| |
| unsigned int |
| foo (unsigned int x) |
| { |
| return __CHAR_BIT__ * sizeof (unsigned int) - __builtin_clz (x); |
| } |
| |
| unsigned int |
| bar (unsigned int x) |
| { |
| return __CHAR_BIT__ * sizeof (unsigned int) - 1 - __builtin_clz (x); |
| } |
| |
| #ifdef __x86_64__ |
| unsigned int |
| baz (unsigned long long x) |
| { |
| return __CHAR_BIT__ * sizeof (unsigned long long) - __builtin_clzll (x); |
| } |
| |
| unsigned int |
| qux (unsigned long long x) |
| { |
| return __CHAR_BIT__ * sizeof (unsigned long long) - 1 - __builtin_clzll (x); |
| } |
| #endif |
