[Bug bootstrap/53249] [4.8 Regression] Bootstrap failure

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53249

--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-05-06 10:55:48 UTC ---
Gah.  Sorry for the breakage.

This is caused by the x86_64 TLS code generating a DImode
MEM address when Pmode == SImode.  As you say here:

  http://gcc.gnu.org/ml/gcc-patches/2012-03/msg01205.html

that's wrong from a pure rtl semantics perspective:
MEM addresses must have the mode given by
targetm.addr_space.address_mode.  Even if having a different
mode happens to work most of the time, I think that's only
by accident.  Your original suggestion avoided this, of course.

I don't understand the constraints you're working under
well enough to suggest anything constructive here, sorry.
I don't know whether it would be possible to model this
as an address space or not.