diff -r 8a58d7b8b26c -r 16f943328696 stage3/fill_candidate_datatypes.cc
--- a/stage3/fill_candidate_datatypes.cc	Tue Mar 13 19:04:07 2012 +0000
+++ b/stage3/fill_candidate_datatypes.cc	Wed Mar 14 10:26:03 2012 +0000
@@ -1106,8 +1106,12 @@
 void *fill_candidate_datatypes_c::visit(IN_operator_c  *symbol) {handle_implicit_il_fb_call(symbol,  "IN", symbol->called_fb_declaration); return NULL;}
 void *fill_candidate_datatypes_c::visit(PT_operator_c  *symbol) {handle_implicit_il_fb_call(symbol,  "PT", symbol->called_fb_declaration); return NULL;}
 
-
-void *fill_candidate_datatypes_c::visit(AND_operator_c *symbol) {
+void *fill_candidate_datatypes_c::visit(AND_operator_c *symbol) {return handle_binary_operator(widen_AND_table, symbol, prev_il_instruction, il_operand);}
+void *fill_candidate_datatypes_c::visit(OR_operator_c  *symbol) {return handle_binary_operator(widen_OR_table,  symbol, prev_il_instruction, il_operand);}
+void *fill_candidate_datatypes_c::visit(XOR_operator_c *symbol) {return handle_binary_operator(widen_XOR_table, symbol, prev_il_instruction, il_operand);}
+
+
+void *fill_candidate_datatypes_c::visit(ANDN_operator_c *symbol) {
 	symbol_c *prev_instruction_type, *operand_type;
 
 	if (NULL == prev_il_instruction) return NULL;
@@ -1120,11 +1124,11 @@
 				add_datatype_to_candidate_list(symbol, prev_instruction_type);
 		}
 	}
-	if (debug) std::cout <<  "AND [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
-	return NULL;
-}
-
-void *fill_candidate_datatypes_c::visit(OR_operator_c *symbol) {
+	if (debug) std::cout <<  "ANDN [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
+	return NULL;
+}
+
+void *fill_candidate_datatypes_c::visit(ORN_operator_c *symbol) {
 	symbol_c *prev_instruction_type, *operand_type;
 
 	if (NULL == prev_il_instruction) return NULL;
@@ -1137,11 +1141,11 @@
 				add_datatype_to_candidate_list(symbol, prev_instruction_type);
 		}
 	}
-	if (debug) std::cout <<  "OR [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
-	return NULL;
-}
-
-void *fill_candidate_datatypes_c::visit(XOR_operator_c *symbol) {
+	if (debug) std::cout <<  "ORN [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
+	return NULL;
+}
+
+void *fill_candidate_datatypes_c::visit(XORN_operator_c *symbol) {
 	symbol_c *prev_instruction_type, *operand_type;
 
 	if (NULL == prev_il_instruction) return NULL;
@@ -1154,57 +1158,6 @@
 				add_datatype_to_candidate_list(symbol, prev_instruction_type);
 		}
 	}
-	if (debug) std::cout <<  "XOR [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
-	return NULL;
-}
-
-void *fill_candidate_datatypes_c::visit(ANDN_operator_c *symbol) {
-	symbol_c *prev_instruction_type, *operand_type;
-
-	if (NULL == prev_il_instruction) return NULL;
-	for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
-		for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
-			prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
-			operand_type = il_operand->candidate_datatypes[j];
-			if (is_type_equal(prev_instruction_type, operand_type) &&
-					is_ANY_BIT_compatible(operand_type))
-				add_datatype_to_candidate_list(symbol, prev_instruction_type);
-		}
-	}
-	if (debug) std::cout <<  "ANDN [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
-	return NULL;
-}
-
-void *fill_candidate_datatypes_c::visit(ORN_operator_c *symbol) {
-	symbol_c *prev_instruction_type, *operand_type;
-
-	if (NULL == prev_il_instruction) return NULL;
-	for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
-		for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
-			prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
-			operand_type = il_operand->candidate_datatypes[j];
-			if (is_type_equal(prev_instruction_type, operand_type) &&
-					is_ANY_BIT_compatible(operand_type))
-				add_datatype_to_candidate_list(symbol, prev_instruction_type);
-		}
-	}
-	if (debug) std::cout <<  "ORN [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
-	return NULL;
-}
-
-void *fill_candidate_datatypes_c::visit(XORN_operator_c *symbol) {
-	symbol_c *prev_instruction_type, *operand_type;
-
-	if (NULL == prev_il_instruction) return NULL;
-	for (unsigned int i = 0; i < prev_il_instruction->candidate_datatypes.size(); i++) {
-		for(unsigned int j = 0; j < il_operand->candidate_datatypes.size(); j++) {
-			prev_instruction_type = prev_il_instruction->candidate_datatypes[i];
-			operand_type = il_operand->candidate_datatypes[j];
-			if (is_type_equal(prev_instruction_type, operand_type) &&
-					is_ANY_BIT_compatible(operand_type))
-				add_datatype_to_candidate_list(symbol, prev_instruction_type);
-		}
-	}
 	if (debug) std::cout <<  "XORN [" << prev_il_instruction->candidate_datatypes.size() << "," << il_operand->candidate_datatypes.size() << "] ==> "  << symbol->candidate_datatypes.size() << " result.\n";
 	return NULL;
 }
@@ -1417,49 +1370,9 @@
 /***********************/
 /* B 3.1 - Expressions */
 /***********************/
-
-void *fill_candidate_datatypes_c::visit(or_expression_c *symbol) {
-	symbol->l_exp->accept(*this);
-	symbol->r_exp->accept(*this);
-	for (unsigned  int i = 0; i < symbol->l_exp->candidate_datatypes.size(); i++) {
-		for (unsigned  int j = 0; j < symbol->r_exp->candidate_datatypes.size(); j++) {
-			if (is_type_equal(symbol->l_exp->candidate_datatypes[i], symbol->r_exp->candidate_datatypes[j])
-					&& is_ANY_BIT_compatible(symbol->l_exp->candidate_datatypes[i]))
-				add_datatype_to_candidate_list(symbol, symbol->l_exp->candidate_datatypes[i]);
-		}
-	}
-	return NULL;
-}
-
-
-void *fill_candidate_datatypes_c::visit(xor_expression_c *symbol) {
-	symbol->l_exp->accept(*this);
-	symbol->r_exp->accept(*this);
-
-	for (unsigned  int i = 0; i < symbol->l_exp->candidate_datatypes.size(); i++) {
-		for (unsigned  int j = 0; j < symbol->r_exp->candidate_datatypes.size(); j++) {
-			if (is_type_equal(symbol->l_exp->candidate_datatypes[i], symbol->r_exp->candidate_datatypes[j])
-					&& is_ANY_BIT_compatible(symbol->l_exp->candidate_datatypes[i]))
-				add_datatype_to_candidate_list(symbol, symbol->l_exp->candidate_datatypes[i]);
-		}
-	}
-	return NULL;
-}
-
-
-void *fill_candidate_datatypes_c::visit(and_expression_c *symbol) {
-	symbol->l_exp->accept(*this);
-	symbol->r_exp->accept(*this);
-
-	for (unsigned  int i = 0; i < symbol->l_exp->candidate_datatypes.size(); i++) {
-		for (unsigned int j = 0; j < symbol->r_exp->candidate_datatypes.size(); j++) {
-			if (is_type_equal(symbol->l_exp->candidate_datatypes[i], symbol->r_exp->candidate_datatypes[j])
-					&& is_ANY_BIT_compatible(symbol->l_exp->candidate_datatypes[i]))
-				add_datatype_to_candidate_list(symbol, symbol->l_exp->candidate_datatypes[i]);
-		}
-	}
-	return NULL;
-}
+void *fill_candidate_datatypes_c::visit(or_expression_c  *symbol) {return handle_binary_expression(widen_OR_table,  symbol, symbol->l_exp, symbol->r_exp);}
+void *fill_candidate_datatypes_c::visit(xor_expression_c *symbol) {return handle_binary_expression(widen_XOR_table, symbol, symbol->l_exp, symbol->r_exp);}
+void *fill_candidate_datatypes_c::visit(and_expression_c *symbol) {return handle_binary_expression(widen_AND_table, symbol, symbol->l_exp, symbol->r_exp);}
 
 
 void *fill_candidate_datatypes_c::visit(equ_expression_c *symbol) {