[Patch, fortran] LBOUND/UBOUND/SHAPE assumed rank support

[Mikael Morin]

Hello,

as promised, I submit the patch (split to 5 pieces) adding support for
assumed rank actual arguments to the LBOUND/UBOUND/SHAPE intrinsics in
the non-scalar case (without the DIM argument).

Patch 1: Disable shape setting and simplification for assumed rank.
Patch 2: Move and rename get_rank_from_desc to gfc_conv_descriptor_rank.
Patch 3: Fix set_loop_bounds #1 (optional).
Patch 4: Fix set_loop_bounds #2.
Patch 5: Properly setup the scalarizer in the {l,u}bound(assumed_rank)
cases.

More details in the patch files.

Regression tested on x86_64-unknown-linux-gnu. OK for trunk?

Mikael





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