re PR c/70093 (Instancing function with VM return type cases internal compiler error in 'assign_stack_temp_for_type'.)
PR c/70093
* c-typeck.c (build_function_call_vec): Create a TARGET_EXPR for
nested functions returning VM types.
* cgraphunit.c (cgraph_node::expand_thunk): Also build call to the
function being thunked if the result type doesn't have fixed size.
* gimplify.c (gimplify_modify_expr): Also set LHS if the result type
doesn't have fixed size.
* gcc.dg/nested-func-10.c: New test.
* gcc.dg/nested-func-9.c: New test.
From-SVN: r234259
