[PATCH][TUPLES] Fix for a number of ICE's in g++ regression test.

[Doug Kwan (關振德)]

Diego,

    Here is an updated patch. Please review. It bootstraps and does
not add new regressions.

-Doug

2008-05-10 Doug Kwan  <dougkwan@google.com>

        in gcc/gcc

        * gimplify.c (gimple_pop_condition): Clear
        conditional_cleanups field after the associated gimple sequence has
        been freed implicitly.
        (gimplify_cleanup_point_expr): Clear conditional_cleanups field
        of gimplfiy_ctxp after resetting the conditions field.
        * gimple.h (gimple_call_return_type): Handle REFERENCE_TYPE like
        POINTER_TYPE.

        in gcc/gcc/cp

        * init.c (build_vec_delete): Add type conversion for argument
        0 of POINTER_PLUS_EXPR.
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