[PATCH, take 2] Fix PR41357

[Dave Korn <dave dot korn dot cygwin at googlemail dot com>]

Dave Korn wrote:

>   Okeydokey, I'll respin and retest.

  And in fact I ended up respinning once more again after some further
discussion in the PR comment trail.  Here is the final patch I tested.

gcc/ChangeLog:

	PR middle-end/41357
	* varasm.c (default_encode_section_info): Copy TLS model into
	sym_ref flags regardless of backend support for TLS, for all
	model types except TLS_MODEL_EMULATED.

  Bootstrapped on i686-pc-cygwin and i686-pc-linux-gnu.  Tests run before(*)
and after(**) on Linux with no regressions.  Verified on Cygwin that it fixes
the testcase (and indeed bootstrap), but it'll be days before the results come
in; I think we'll be OK, and I'll be around to fix any fallout if it does crop up.

  Ok for HEAD?

    cheers,
      DaveK
-- 
(*)  - http://gcc.gnu.org/ml/gcc-testresults/2009-09/msg01450.html
(**) - http://gcc.gnu.org/ml/gcc-testresults/2009-09/msg01454.html

Index: varasm.c
===================================================================
--- varasm.c	(revision 151703)
+++ varasm.c	(working copy)
@@ -6417,8 +6417,8 @@ default_encode_section_info (tree decl, rtx rtl, i
     flags |= SYMBOL_FLAG_FUNCTION;
   if (targetm.binds_local_p (decl))
     flags |= SYMBOL_FLAG_LOCAL;
-  if (targetm.have_tls && TREE_CODE (decl) == VAR_DECL
-      && DECL_THREAD_LOCAL_P (decl))
+  if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl)
+	&& DECL_TLS_MODEL (decl) != TLS_MODEL_EMULATED)
     flags |= DECL_TLS_MODEL (decl) << SYMBOL_FLAG_TLS_SHIFT;
   else if (targetm.in_small_data_p (decl))
     flags |= SYMBOL_FLAG_SMALL;