re PR ada/36957 (ACATS ce3801b ICE emit_move_insn, at expr.c:3381 post tuple merge)

2008-07-28  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/36957
	* tree-flow.h (tree_ssa_useless_type_conversion): Remove.
	(useless_type_conversion_p): Remove.
	(types_compatible_p): Remove.
	* gimple.h (tree_ssa_useless_type_conversion): Declare.
	(useless_type_conversion_p): Declare.
	(types_compatible_p): Declare.
	(gimple_expr_type): Return the base type only if it is
	trivially convertible to the subtype.

From-SVN: r138217