http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47150
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-03
11:16:35 UTC ---
The problem is in save_expr called by convert_to_complex when converting
non-COMPLEX_EXPR _Complex float expression to _Complex double. As this is not
c_save_expr that is called there (and can't, because convert_to_complex is used
in non-Cish FEs), c_fully_fold is not called on the argument and as further
c_fully_fold doesn't dive into SAVE_EXPRs, nothing afterwards fully folds it
either, which means it survives until gimplification and crashes there.
An ugly fix would be duplicate the problematic part of convert_to_complex in
c-convert.c (if converting COMPLEX_TYPE to a different COMPLEX_TYPE and
expression is not COMPLEX_EXPR) and use c_save_expr there instead.
