[PATCH, Fortran] pad char to int conversions with spaces instead of zeros (legacy)

[Mark Eggleston]

Here is a patch to considered for incorporation into gfortran adding to 
its legacy support. It pads character to integer conversions using 
spaces instead of zeros when enabled.

The pad character is 'undefined' or 'processor dependent' depending on 
which standard you read. This makes it 0x20 which matches the Oracle 
Fortran compiler.

Enabled using -fdec-pad-with-spaces and -fdec.

Please find attached a patch file and text files containing change log 
entries for gcc/fortran and gcc/testsuite.

Note: I do not have write access so can not commit changes. Someone else 
will have to commit the change if it is acceptable.

There are several more patches to support legacy Fortran which will be 
sent in order.

regards,

Mark Eggleston

-- 
https://www.codethink.co.uk/privacy.html

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	Jim MacArthur <jim.macarthur@codethink.co.uk>
	Mark Eggleston <mark.eggleston@codethink.com>

	-fdec-pad-with-spaces
	* gcc/fortran/lang.opt: add new option.
	* gcc/fortran/options.c (set_dec_flags): add SET_BITFLAG for
	flag_dec_pad_with_spaces.
	* gcc/fortran/simplify.c (gfc_simplify_transfer): memset with
	0x20 instead of 0x0 when flag_dec_pad_with_spaces is set.
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	Mark Eggleston <mark.eggleston@codethink.com>

	-fdec-pad-with-spaces
	* gfortran.dg/dec-pad-with-spaces-1.f90: New test.
	* gfortran.dg/dec-pad-with-spaces-2.f90: New test.
	* gfortran.dg/dec-pad-with-spaces-3.f90: New test.