This is a follow up to the thread here:
https://sourceware.org/ml/gdb-patches/2014-10/msg00000.html

I have made all the suggested changes which now eliminates the need
for two patches in this set. The single patch is attached.

gdb/ChangeLog:

2014-10-25  Siva Chandra Reddy  <sivachandra@google.com>

        * eval.c (evaluate_expression): Cleanup stack mirrors that might
        have been created.
        (add_value_to_expression_stack, skip_current_expression_stack):
        New functions.
        * expression.h (struct expression): New field
        'on_stack_temporaries_vec'.
        * gdbtypes.c (class_or_union_p): New function.
        * gdbtypes.h (class_or_union_p): Declare.
        * infcall.c (call_function_by_hand): New argument EXP of type
        struct expression *. Setup stack temporaries for return values of
        class type.
        (get_return_value_from_memory): New function.
        * infcall.h (call_function_by_hand): Update signature and all
        callers.
        * valarith.c (value_x_binop): New argument EXP of type
        struct expression *.
        (value_x_unop): Likewise.
        * value.c (write_value_to_memory): New function.
        (value_fetch_lazy): Fix its description comment.
        * value.h (add_value_to_expression_stack)
        (skip_current_expression_stack, write_value_to_memory): Declare.
        (value_x_binop, value_x_unop): Update signature and all callers.

gdb/testsuite/ChangeLog:

2014-10-25  Siva Chandra Reddy  <sivachandra@google.com>

        * gdb.cp/chained-calls.cc: New file.
        * gdb.cp/chained-calls.exp: New file.
        * gdb.cp/smartp.exp: Remove KFAIL from c2->inta.