https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67351
Allan Jensen <linux at carewolf dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Allan Jensen <linux at carewolf dot com> ---
With a recent gcc 6 this example appears perfectly optimized:
Disassembly of section .text:
0000000000000000 <_Z4testv>:
0: 48 83 ec 08 sub $0x8,%rsp
4: e8 00 00 00 00 callq 9 <_Z4testv+0x9>
9: 25 ff ff 00 ff and $0xff00ffff,%eax
e: 48 83 c4 08 add $0x8,%rsp
12: 0d 00 00 f0 00 or $0xf00000,%eax
17: c3 retq
18: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
1f: 00
0000000000000020 <_Z6test64v>:
20: 48 83 ec 08 sub $0x8,%rsp
24: e8 00 00 00 00 callq 29 <_Z6test64v+0x9>
29: 48 ba ff ff ff ff 00 movabs $0xffff0000ffffffff,%rdx
30: 00 ff ff
33: 48 83 c4 08 add $0x8,%rsp
37: 48 21 d0 and %rdx,%rax
3a: 48 ba 00 00 00 00 f0 movabs $0xf0f000000000,%rdx
41: f0 00 00
44: 48 09 d0 or %rdx,%rax
47: c3 retq
