From e11eda53660f19bcbcede3bb25b09a71363cef21 Mon Sep 17 00:00:00 2001
From: Tucker Evans <tuckerevans24@gmail.com>
Date: Mon, 7 Oct 2019 23:59:11 -0400
Subject: Add scope based stack offsets for variables

---
 gen_code.c | 3 ++-
 node.h     | 1 +
 pc.h       | 2 ++
 pc.y       | 2 ++
 scope.c    | 2 ++
 scope.h    | 1 +
 6 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gen_code.c b/gen_code.c
index 9f13a2d..be56e83 100644
--- a/gen_code.c
+++ b/gen_code.c
@@ -123,7 +123,8 @@ ptree *t;
 	switch (t->type){
 	case ASSIGNOP:
 		if (t->l->ret_type == INT) {
-			fprintf(stderr, "ASSIGN (INT) %s\n", t->l->attr.nval->name);
+			GEN_EXPR(t->r);
+			fprintf(stdout, "mov %s, ADDR\n", *reg_ptr);
 		} else {
 			fprintf(stderr, "ASSIGN (REAL) %s\n", t->l->attr.nval->name);
 		}
diff --git a/node.h b/node.h
index e59cb86..8bafcc0 100644
--- a/node.h
+++ b/node.h
@@ -17,6 +17,7 @@ typedef struct node_s {
 	char *name;
 	struct node_s *next;
 	int var_type;
+	int offset;
 
 	struct fi* func_info;
 	struct ai* array_info;
diff --git a/pc.h b/pc.h
index 04f8bfe..e49d665 100644
--- a/pc.h
+++ b/pc.h
@@ -13,5 +13,7 @@ int yyerror(char*);
 int count_args(ptree*);
 int set_func_types(ptree*, int*, int);
 int get_call_types(ptree*, int*, int);
+
+#define OFFSET_SIZE 8
 #endif
 
diff --git a/pc.y b/pc.y
index 23b3b24..3753cdf 100644
--- a/pc.y
+++ b/pc.y
@@ -133,6 +133,7 @@ id_list
 		check_id(cur_scope, $1);
 
 		tmp = scope_insert(cur_scope, $1);
+		tmp->offset = cur_scope->offset++;
 		$$ = mkid(tmp);
 	}
 	|id_list ',' ID
@@ -141,6 +142,7 @@ id_list
 
 		check_id(cur_scope, $3);
 		tmp = scope_insert(cur_scope, $3);
+		tmp->offset = cur_scope->offset++;
 		$$ = mktree(LIST, $1, mkid(tmp));
 	}
 ;
diff --git a/scope.c b/scope.c
index d7d50fc..47e5943 100644
--- a/scope.c
+++ b/scope.c
@@ -21,6 +21,8 @@ scope* mkscope()
 	p->prev = NULL;
 	p->ret_var= NULL;
 
+	p->offset = 2;
+
 	return p;
 }
 
diff --git a/scope.h b/scope.h
index 4fbe9ca..e3af747 100644
--- a/scope.h
+++ b/scope.h
@@ -9,6 +9,7 @@ typedef struct hash {
 	node* table[HASH_SIZE];
 	struct hash *prev;
 	node* ret_var;
+	int offset;
 } scope;
 
 scope* mkscope();
-- 
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