re PR tree-optimization/16443 (ICE during linux kernel compilation)

	PR tree-optimization/16443
	* tree-ssa-alias.c: Add more description for
	CALL_CLOBBERED_VARS and ADDRESSABLE_VARS.
	* tree-ssa-operands.c (get_asm_expr_operands): Re-order the
	clobbering of call-clobbered and addressable variables.  If
	there are any before aliases have been computed, add them.

testsuite/ChangeLog

	PR tree-optimization/16443
	* gcc.dg/tree-ssa/20040713-1.c: New test.

From-SVN: r84641