[Bug c/19342] [4.0 regression] ICE in common_type, at c-typeck.c:490

["joseph at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From joseph at codesourcery dot com  2005-01-18 20:10 -------
Subject: Re:  [4.0 regression] ICE in common_type, at c-typeck.c:490

On Tue, 18 Jan 2005, jakub at gcc dot gnu dot org wrote:

> But did this change for all frontends or just C?
> In the code in question common_type is used by code common to C and C++.

I think the underlying problems there are (1) undesigned ad hoc sharing 
between the front ends, (2) this language-specific function being called 
from what's essentially an optimization, not only on types that appear 
directly in the source as operands to which usual arithmetic conversions 
are to be applies, (3) this optimization happens at this stage at all, 
rather than later in a language-independent way that doesn't need to call 
back into front ends.  Short term, allowing enumerated types in 
common_type for C for this special case would make sense as a fix for this 
bug.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19342