* config/c4x/c4x.md (set_ldp_prologue): Add for RTL prologue/epilogue.
	(push_st, push_dp, pop_st, pop_dp, popqi_unspec): Likewise.
	(nodb_call, return_from_epilogue): Likewise.
	(return_from_interrupt_epilogue, prologue, epilogue): Likewise.
	* config/c4x/c4x.c (c4x_expand_prologue, c4x_expand_eplilogue): Add.
	* config/c4x/c4x-protos.h (c4x_interrupt_function_p): Add.
	(c4x_expand_prologue, c4x_expand_epilogue): Likewise.
	(c4x_valid_type_attribute_p): Likewise.
	* config/c4x/c4x.h (FUNCTION_PROLOGUE, FUNCTION_EPILOGUE): Delete.
	(FUNCTION_BLOCK_PROFILER_EXIT): Convert to emit RTL.

Co-Authored-By: Michael Hayes <m.hayes@elec.canterbury.ac.nz>

From-SVN: r35341