IPA ICF: compare_operand is split to multiple functions.

	* 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

gcc/ChangeLog

 2015-01-09  Martin Liska  <mliska@suse.cz>
 
+	* 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.
+
+2015-01-09  Martin Liska  <mliska@suse.cz>
+
 	PR ipa/64503
 	* sreal.c (sreal::dump): Change unsigned format to signed for
 	m_exp value.

gcc/ipa-icf-gimple.h

@@ -203,7 +203,14 @@ public:
   /* Verifies that tree labels T1 and T2 correspond.  */
   bool compare_tree_ssa_label (tree t1, tree t2);
 
-  /* Function responsible for comparison of handled components T1 and T2.
+  /* Function compare for equality given memory operands T1 and T2.  */
+  bool compare_memory_operand (tree t1, tree t2);
+
+  /* Function compare for equality given trees T1 and T2 which
+     can be either a constant or a declaration type.  */
+  bool compare_cst_or_decl (tree t1, tree t2);
+
+  /* Function responsible for comparison of various operands T1 and T2.
      If these components, from functions FUNC1 and FUNC2, are equal, true
      is returned.  */
   bool compare_operand (tree t1, tree t2);