[Fortran-dev, patch] Use only lbound/extent/sm in the array descriptor

[Tobias Burnus]

Dear all,

with that patch, the array descriptor on the fortran-dev branch uses now 
the dimension triplet as defined in TS29113. This patch removes 
ubound/stride and updates all calls.

There are still 227 test-suite failures ("FAIL" lines) affecting 27 
test-suite files. That's slightly down from the 269 lines the branch 
currently has. (Some issues can be fixed by modifying the tree dump 
patterns, but most seem to be "real" problems.)

Build and regtested on x86-64-linux.
OK for the branch?


TODO:
- Fixing the regressions.
- Cleanup of the library and the front end
- Switching also from ubound -> extent for nondescriptor arrays?
- Properly implement subpointers

(Plus the other changes like: rank, type, elem_len etc.)

Tobias

PS: Currently failing are the following 24+3 tests:

gfortran.dg/realloc_on_assign_5.f03  [fails also on the trunk]
gfortran.dg/lto/pr45586  [ditto]
gfortran.dg/lto/pr45586-2  [ditto]

gfortran.dg/array_section_2.f90
gfortran.dg/assign_10.f90
gfortran.dg/associated_2.f90
gfortran.dg/auto_char_dummy_array_1.f90
gfortran.dg/auto_char_len_3.f90
gfortran.dg/c_f_pointer_complex.f03
gfortran.dg/c_f_pointer_shape_tests_2.f03
gfortran.dg/c_f_pointer_shape_tests_4.f03
gfortran.dg/c_f_pointer_tests_4.f90
gfortran.dg/c_f_pointer_tests.f90
gfortran.dg/class_array_1.f03
gfortran.dg/class_array_2.f03
gfortran.dg/class_array_3.f03
gfortran.dg/class_to_type_1.f03
gfortran.dg/coarray_12.f90
gfortran.dg/contiguous_3.f90
gfortran.dg/optional_dim_3.f90
gfortran.dg/pr32921.f
gfortran.dg/proc_decl_23.f90
gfortran.dg/read_eof_all.f90
gfortran.dg/subref_array_pointer_2.f90
gfortran.dg/transfer_intrinsic_3.f90
gfortran.dg/transpose_optimization_2.f90
gfortran.dg/widechar_intrinsics_5.f90
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