[Bug fortran/45077] ICE with -fwhole-file in fold_convert_loc, at fold-const.c:2021

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45077

--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-02-20 11:39:56 UTC ---
(In reply to comment #6)
> Fixes the problem.  Bootstraps and regtests OK.

I glanced at it and it looks OK.

> dg-additional-sources is not sufficient is it?  That is does it generate:
> gfortran source1.f90 source2.f90
> or 
> gfortran -c source1.f90 -o source1.o
> gfortran source2.f90 source1.0

I think both are effectively the same: For "gfortran source2.f90 source1.f90",
the driver (gfortran) calls twice the compiler (f951) which generates in
/tmp/... the assembler files, the driver then calls the assembler (as) twice
and, finally, the linker (collect1). The driver only combined the two source
files when "-combined" is used, though I think that feature was not available
for Fortran and will not work with dg-additional-sources.
That can be seen when running "gfortran -v source2.f90 source1.f90" by looking
for the f951 lines.

Note: The file specified by dg-additional-sources is compiled after the one
which has the "dg-additional-sources" specified. Additionally, one needs to
provide a fall-back compilation as the second file is also compiled
independently.
See pr37287-1.f90 and pr37287-2.F90 as an example.