[Bug target/80881] Implement Windows native TLS

[ebotcazou at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881

--- Comment #37 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 59304
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59304&action=edit
Minimal reproducer

To be compiled with -O:

team.c: In function 'gomp_team_start':
team.c:22:1: error: unrecognizable insn:
   22 | }
      | ^
(insn 8 7 9 2 (set (reg:DI 101)
        (const:DI (plus:DI (unspec:DI [
                        (symbol_ref:DI ("gomp_tls_data") [flags 0x2a] <var_decl
0x7ffb0f019cf0 gomp_tls_data>)
                    ] UNSPEC_SECREL32)
                (const_int 8 [0x8])))) "team.c":21:24 -1
     (nil))
during RTL pass: vregs
team.c:22:1: internal compiler error: in extract_insn, at recog.cc:2882