Hi all, the SIZEOF intrinsic currently returns the size according to the *declared* type for polymorphic variables. I think this doesn't really make much sense and it also causes ICEs when SIZEOF is called on CLASS(*) variables (which don't really have a declared type). Therefore I'm proposing to make SIZEOF return the size according to the *dynamic* type instead. The same is done by STORAGE_SIZE (F08), which however gives the size in bits. SIZEOF is a GNU extension, so we are free to decide on its behavior. I don't remember why the declared type was chosen in the first place, and I hope that no one seriously depends on the current behavior (the size of the declared type is probably not really useful after all).
The patch was regtested on x86_64-unknown-linux-gnu. Ok for trunk?
Cheers,
Janus
2013-08-22 Janus Weil <ja...@gcc.gnu.org>
PR fortran/57305
* intrinsic.texi (SIZEOF): Update documentation.
* trans-intrinsic.c (gfc_conv_intrinsic_sizeof): Make SIZEOF return the
size of the dynamic type for polymorphic variables.
2013-08-22 Janus Weil <ja...@gcc.gnu.org>
PR fortran/57305
* gfortran.dg/storage_size_1.f08: Modified.
* gfortran.dg/sizeof_4.f90: New.
pr57305.diff
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sizeof_4.f90
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