--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage3/flow_control_analysis.hh Wed Aug 22 16:46:17 2012 +0200
@@ -0,0 +1,162 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt)
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Do flow control analysis of the IEC 61131-3 code.
+ *
+ * We currently only do this for IL code.
+ * This class will annotate the abstract syntax tree, by filling in the
+ * prev_il_instruction variable in the il_instruction_c, so it points to
+ * the previous il_instruction_c object in the instruction list instruction_list_c.
+ */
+
+
+
+#include "../absyntax_utils/absyntax_utils.hh"
+
+
+class flow_control_analysis_c: public iterator_visitor_c {
+
+ private:
+ search_il_label_c *search_il_label;
+ symbol_c *prev_il_instruction;
+ symbol_c *curr_il_instruction;
+ bool prev_il_instruction_is_JMP_or_RET;
+
+ public:
+ flow_control_analysis_c(symbol_c *ignore);
+ virtual ~flow_control_analysis_c(void);
+
+ /**************************************/
+ /* B 1.5 - Program organization units */
+ /**************************************/
+ /***********************/
+ /* B 1.5.1 - Functions */
+ /***********************/
+ void *visit(function_declaration_c *symbol);
+
+ /*****************************/
+ /* B 1.5.2 - Function blocks */
+ /*****************************/
+ void *visit(function_block_declaration_c *symbol);
+
+ /**********************/
+ /* B 1.5.3 - Programs */
+ /**********************/
+ void *visit(program_declaration_c *symbol);
+
+ /********************************/
+ /* B 1.7 Configuration elements */
+ /********************************/
+ void *visit(configuration_declaration_c *symbol);
+
+ /****************************************/
+ /* B.2 - Language IL (Instruction List) */
+ /****************************************/
+ /***********************************/
+ /* B 2.1 Instructions and Operands */
+ /***********************************/
+ void *visit(instruction_list_c *symbol);
+ void *visit(il_instruction_c *symbol);
+// void *visit(il_simple_operation_c *symbol);
+// void *visit(il_function_call_c *symbol);
+ void *visit(il_expression_c *symbol);
+ void *visit(il_jump_operation_c *symbol);
+// void *visit(il_fb_call_c *symbol);
+// void *visit(il_formal_funct_call_c *symbol);
+// void *visit(il_operand_list_c *symbol);
+ void *visit(simple_instr_list_c *symbol);
+ void *visit(il_simple_instruction_c*symbol);
+// void *visit(il_param_list_c *symbol);
+// void *visit(il_param_assignment_c *symbol);
+// void *visit(il_param_out_assignment_c *symbol);
+
+ /*******************/
+ /* B 2.2 Operators */
+ /*******************/
+// void *visit( LD_operator_c *symbol);
+// void *visit( LDN_operator_c *symbol);
+// void *visit( ST_operator_c *symbol);
+// void *visit( STN_operator_c *symbol);
+// void *visit( NOT_operator_c *symbol);
+// void *visit( S_operator_c *symbol);
+// void *visit( R_operator_c *symbol);
+// void *visit( S1_operator_c *symbol);
+// void *visit( R1_operator_c *symbol);
+// void *visit( CLK_operator_c *symbol);
+// void *visit( CU_operator_c *symbol);
+// void *visit( CD_operator_c *symbol);
+// void *visit( PV_operator_c *symbol);
+// void *visit( IN_operator_c *symbol);
+// void *visit( PT_operator_c *symbol);
+// void *visit( AND_operator_c *symbol);
+// void *visit( OR_operator_c *symbol);
+// void *visit( XOR_operator_c *symbol);
+// void *visit( ANDN_operator_c *symbol);
+// void *visit( ORN_operator_c *symbol);
+// void *visit( XORN_operator_c *symbol);
+// void *visit( ADD_operator_c *symbol);
+// void *visit( SUB_operator_c *symbol);
+// void *visit( MUL_operator_c *symbol);
+// void *visit( DIV_operator_c *symbol);
+// void *visit( MOD_operator_c *symbol);
+// void *visit( GT_operator_c *symbol);
+// void *visit( GE_operator_c *symbol);
+// void *visit( EQ_operator_c *symbol);
+// void *visit( LT_operator_c *symbol);
+// void *visit( LE_operator_c *symbol);
+// void *visit( NE_operator_c *symbol);
+// void *visit( CAL_operator_c *symbol);
+// void *visit( CALC_operator_c *symbol);
+// void *visit(CALCN_operator_c *symbol);
+ void *visit( RET_operator_c *symbol);
+// void *visit( RETC_operator_c *symbol);
+// void *visit(RETCN_operator_c *symbol);
+ void *visit( JMP_operator_c *symbol);
+// void *visit( JMPC_operator_c *symbol);
+// void *visit(JMPCN_operator_c *symbol);
+
+ /* Symbol class handled together with function call checks */
+ // void *visit(il_assign_operator_c *symbol, variable_name);
+ /* Symbol class handled together with function call checks */
+ // void *visit(il_assign_operator_c *symbol, option, variable_name);
+
+}; // flow_control_analysis_c
+
+
+
+
+
+
+
+