[RFC] Extend ipa-bitwise-cp with pointer alignment propagation

Jan Hubicka hubicka@ucw.cz
Thu Oct 6 13:21:00 GMT 2016


> >
> > What do you mean by "for instance?"  What are the other cases when it
> > happens?
> Well ipa_get_type() returned NULL for 481.wrf, and I assumed it was a
> fortran-only
> code-base but apparently it's a mix of C and fortran.

Yep, I also have expreinece that the K&R style declarations are more common
than one would expect 30 years after the language was obsoletted.
> ipa_get_type() returned NULL for param 'n' in
> get_initial_data_value_() which is defined
> as K&R style function in wrf_num_bytes_between.c, so it seems K&R is the
> only case where ipa_get_type() returns NULL.
> 
> I have a question though on how to reduce fortran test-cases or a mix
> of fortran/C
> like 481.wrf ? For C/C++ only tests-cases, I use creduce.

I use delta/multidelta
https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction

It works pretty well and one can reduce first list of files and then file at a
time.

Honza



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