https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43883
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
4.7 produces:
shr rsi, 63
mov rax, rdi
xor edi, edi
add rax, rsi
xor r10d, r10d
mov r9, rax
mov rdx, r10
and r9d, 1
mov rax, r9
sub rax, rsi
sbb rdx, rdi
ret
4.9:
mov rcx, rsi
sar rcx, 63
xor rdi, rcx
mov rdx, rcx
mov rax, rdi
sub rax, rcx
and eax, 1
xor rax, rcx
sub rax, rcx
sbb rdx, rcx
ret
7.1.0-7.3.0, 8.1.0-8.2.0 decides not to inline it:
sub rsp, 8
.cfi_def_cfa_offset 16
mov edx, 2
xor ecx, ecx
call __modti3
add rsp, 8
.cfi_def_cfa_offset 8
ret
And then we are back to the 4.9 code gen for 7.4, 8.3 and 9.x
10.x produces:
mov r10, rsi
mov r8, rdi
sar r10, 63
xor r8, r10
mov rdx, r10
mov rax, r8
sub rax, r10
and eax, 1
xor rax, r10
sub rax, r10
sbb rdx, r10
ret
GCC 11 and trunk is back to the 4.9 code gen
