[Bug lto/42088] flag_gtoggle in free_lang_data hides -fcompare-debug errors

[rguenth at gcc dot gnu dot org]

------- Comment #10 from rguenth at gcc dot gnu dot org  2009-11-19 14:40 -------
Btw I can reproduce the bootstrap comparison fail with Ada when removing the
bogus flag_gtoggle check.  Fixing the problem with canonicalize_cond_expr_cond
isn't the whole story appearantly - fixing it doesn't fix the miscompare.
Still fixing it makes sense anyway, so I'm currently testing a patch.

For not doing the boolean_type_node fixing we'd need to not pre-load the
streamer chache with (selected) builtin type nodes but instead stream them
with every unit and function and pass them through the merging machinery.
Basically make lto_get_common_nodes return an empty vector (that likely
requires us to register and fixup all builtin types in lto1 before starting
to stream in stuff - I likely have some patches doing this somewhere).

I know it's all sort-of a mess right now ... (still tracking down the
specific Ada problem is intersting).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42088