https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881
--- Comment #82 from LIU Hao <lh_mouse at 126 dot com> ---
(In reply to Uroš Bizjak from comment #81)
> (In reply to Julian Waters from comment #75)
> > Any feedback on the new patch?
>
> I would propose you legitimize TLS address using get_thread_pointer (as is
> the case with Eric's patch). Generic optimizers are then able to optimize
> the access to the symbol and later rewrite the address to a TLS named
> address space.
>
> Please consider this testcase (very relevant on linux, I don't know about
> Windows):
>
> --cut here--
> extern __thread int i[8];
>
> int foo (void)
> {
> return i[2] + i[4];
> }
> --cut here--
>
This also compiles fine with this patch (backported to GCC 14) which produces:
(x86-32)
```
mov eax, DWORD PTR "__tls_index"
mov edx, DWORD PTR fs:44
mov edx, DWORD PTR [edx+eax*4]
mov eax, DWORD PTR "_i"@secrel32[edx+16]
add eax, DWORD PTR "_i"@secrel32[edx+8]
ret
```
(x86-64)
```
mov eax, DWORD PTR "_tls_index"[rip]
mov rdx, QWORD PTR gs:88
mov rdx, QWORD PTR [rdx+rax*8]
mov eax, DWORD PTR "i"@secrel32[rdx+16]
add eax, DWORD PTR "i"@secrel32[rdx+8]
ret
```
