* ipa-icf-gimple.c (func_checker::compare_ssa_name): Enhance SSA
	name comparison.
	(func_checker::compare_memory_operand): New function.
	(func_checker::compare_operand): Split case to newly
	added functions.
	(func_checker::compare_cst_or_decl): New function.
	(func_checker::compare_gimple_call): Identify
	memory operands.
	(func_checker::compare_gimple_assign): Likewise.
	* ipa-icf-gimple.h: New function.

From-SVN: r219379