[Bug debug/41357] libgomp build fail

[davek at gcc dot gnu dot org]

------- Comment #25 from davek at gcc dot gnu dot org  2009-09-16 10:51 -------
(In reply to comment #24)
> As the __emul* decls are using TLS_MODEL_EMULATED, this patch might make even
> their SYMBOL_REFs start using that TLS model.  But, unlike the user vars, these
> occur normally in the instruction stream, so I wonder if this patch won't break
> things.  Perhaps we shouldn't set SYMBOL_REF_TLS_MODEL if DECL_TLS_MODEL is
> TLS_MODEL_EMULATED, otherwise it risks that e.g. backends reject it as invalid
> constant.

  Yes, I see what you mean.  There are a lot of references to every other kind
of TLS_MODEL_xxx value in the backend files, but no mentions of
TLS_MODEL_EMULATED.  And just to pick one example:
xtensa_legitimize_tls_address() will gcc_unreachable() if it sees that value. 
So I'll give it one more try, adding a check that the decl's model isn't
_EMULATED.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41357