1 /* PR target/78103 */
2 /* { dg-do compile { target { ! ia32 } } } */
3 /* { dg-options "-O2 -mno-lzcnt" } */
4 /* { dg-final { scan-assembler-not {\mmovl\M} } } */
5 /* { dg-final { scan-assembler-not {\mmovslq\M} } } */
6 /* { dg-final { scan-assembler-not {\mxor[lq]\M} } } */
7 /* { dg-final { scan-assembler-not {\msubq\M} } } */
8 /* { dg-final { scan-assembler {\m(leaq|addq|incq)\M} { target { ! x32 } } } } */
9 /* { dg-final { scan-assembler {\m(leal|addl|incl)\M} { target x32 } } } */
10
11 unsigned long long
foo(unsigned int x)12 foo (unsigned int x)
13 {
14 return __CHAR_BIT__ * sizeof (unsigned int) - __builtin_clz (x);
15 }
16
17 unsigned long long
bar(unsigned int x)18 bar (unsigned int x)
19 {
20 return __CHAR_BIT__ * sizeof (unsigned int) - 1 - __builtin_clz (x);
21 }
22
23 unsigned long long
baz(unsigned long long x)24 baz (unsigned long long x)
25 {
26 return __CHAR_BIT__ * sizeof (unsigned long long) - __builtin_clzll (x);
27 }
28
29 unsigned long long
qux(unsigned long long x)30 qux (unsigned long long x)
31 {
32 return __CHAR_BIT__ * sizeof (unsigned long long) - 1 - __builtin_clzll (x);
33 }
34