Updated: RFA: partially hookize POINTER_SIZE

Joseph S. Myers joseph@codesourcery.com
Sun Jun 26 16:28:00 GMT 2011

The cppbuiltin.c and c-common.c changes are OK.  I'm not sure what the 
best approach is for a proper hook conversion of POINTER_SIZE, but I don't 
think this patch makes things any worse.  (The things that need 
considering together in a hook conversion are how the modes for both Pmode 
and ptr_mode are defined, as well as the POINTER_SIZE macro - and I'm not 
sure why Pmode is a macro but ptr_mode a global variable.  I suspect it 
should be necessary to define just the two modes and not a separate 
POINTER_SIZE, but this may be one of the trickier and riskier hook 
conversions, and a wrapper pointer_size function, such as in this patch, 
probably does make sense for use in front-end code rather than front ends 
using the modes and target hooks directly.  Maybe things should be turned 
around so that the pointer_mode and address_mode hooks are what are used 
to define ptr_mode and Pmode, rather than being defined in terms of those 

Joseph S. Myers

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