ChangeLog:

	PR tree-optimization/18184
	* c-typeck.c (comptypes): Do not treat pointers of different
	modes or alias-all flags as equivalent.
	* tree-ssa.c (tree_ssa_useless_type_conversion_1): Likewise.

cp/ChangeLog:

	PR tree-optimization/18184
	* cp-objcp-common.c (cxx_types_compatible_p): Do not treat pointers
	of different modes or alias-all flags as equivalent.
	* typeck.c (comptypes): Likewise.

From-SVN: r90078