https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94650
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Status|NEW |ASSIGNED
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 48315
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48315&action=edit
Prototype patch
Using this patch, the following asm is created (-O2):
--cut here--
check:
xorl %eax, %eax
shrq $40, %rdi
setne %al
ret
test0:
shrq $40, %rdi
jne .L5
ret
.L5:
xorl %edi, %edi
jmp g
test1:
movq %rdi, %rax
shrq $40, %rax
jne .L8
ret
.L8:
jmp g
--cut here--
