compiler/unify_gen.m:
Add type_info, typeclass_info and ground term constants to the var
state map using assign_const_to_var instead of assign_expr_to_var.
expr_is_constant will fail if a constant expression is added with
the more general assign_expr_to_var, causing missed opportunities
to construct terms statically in var_locn.m.
Prevents a compiler abort (bug #457) where mark_static_terms.m
determines that a term can be constructed statically but var_locn.m
decides otherwise.
compiler/var_locn.m:
Do not abort if var_locn_assign_dynamic_cell_to_var is passed
`construct_statically'. Even after the previous change, it is
possible for mark_static_terms.m to determine that a cell with a
dummy type argument can be constructed statically but var_locn.m
currently does not. This was preventing bootchecks at
-O5 --intermodule-optimization.
compiler/hlds_goal.m:
Fix misleading documentation for how_to_construct.
tests/valid/Mercury.options:
tests/valid/bug457.m:
Add a test case.
