this

src/codegen.c

@@ -744,7 +744,7 @@ int generateFunctionStart(Instruction *inst) {
     fprintf(cg_flag, "%s:\n", getName(funDecTN));
     fprintf(cg_flag, "\tpushq\t%%rbp\n");
     fprintf(cg_flag, "\tmovq\t%%rsp, %%rbp\n");
-    fprintf(cg_flag, "\tsubq\t$%d, %%rsp\n", 128);  // [CHANGE ME] 128 is a placeholder for the stack size
+    fprintf(cg_flag, "\tsubq\t$%d, %%rsp\n", getStackSize());
 
     //now we need to add the CGs of nodes to the CG list by doing assign from the
     // have function declararation node

src/codegen.h

@@ -68,6 +68,7 @@ int generateFunctionStart(Instruction *instruction);
 extern int label_count;
 extern Instruction *begin;
 extern Instruction *current;
+extern SymbolTable *top;
 
 extern int offset;
 extern int currentsp;

src/symbol_table.c

@@ -462,7 +462,7 @@ int getRecSize(SymbolTable *tn) {
     }
     return -1;
 }
-int getRecPosition(TableNode* rec, char* id){
+int getRecPosition(TableNode *rec, char *id) {
     if (rec == NULL) {
         printdebug(
             "passed a NULL entry to getRecPosition. Invalid.");
@@ -478,25 +478,25 @@ int getRecPosition(TableNode* rec, char* id){
             "not checking the position of a record -- invalid op");
         return -1;
     }
-    TableNode* cur = getFirstEntry(getRecList(rec));
+    TableNode *cur = getFirstEntry(getRecList(rec));
     int i = 1;
-    while(cur != NULL){
-        if(strcmp(getName(cur), id) == 0){
+    while (cur != NULL) {
+        if (strcmp(getName(cur), id) == 0) {
             return i;
         }
         cur = getNextEntry(cur);
         i++;
     }
-    if (cur == NULL){
+    if (cur == NULL) {
         printdebug(
             "passed an invalid entry to getRecPosition. Invalid.");
         return -1;
-    }else{
+    } else {
         return i;
     }
 }
 
-int getElementOffset(TableNode *rec, char* id) {
+int getElementOffset(TableNode *rec, char *id) {
     if (rec == NULL) {
         printdebug(
             "passed a NULL entry to getElementOffset. Invalid.");
@@ -512,7 +512,7 @@ int getElementOffset(TableNode *rec, char* id) {
             "not checking the offset of a record -- invalid op");
         return -1;
     }
-    int* offsets = getRecOffsets(rec);
+    int *offsets = getRecOffsets(rec);
     int position = getRecPosition(rec, id);
     if (position == -1) {
         printdebug(
@@ -522,11 +522,11 @@ int getElementOffset(TableNode *rec, char* id) {
     position = position - 1;
     int total_offset = 0;
     int current_position = 1;
-    while(current_position < position+1){
+    while (current_position < position + 1) {
         //adding current element in struct
-        total_offset += offsets[2*current_position];
+        total_offset += offsets[2 * current_position];
         //adding padding between elements
-        total_offset += offsets[2*current_position+1];
+        total_offset += offsets[2 * current_position + 1];
         current_position++;
     }
     //returning the offset of the start of the element
@@ -1739,3 +1739,28 @@ TableNode *printTableNode(TableNode *tn) {
 
     return tn;
 }
+
+int getStackSize() {
+    int i = 0;
+    TableNode *tn = getFirstEntry(top);
+    while (tn != NULL) {
+        i++;
+        tn = getNextEntry(tn);
+    }
+
+    ListOfTable *lt = getChildren(top);
+    while (lt != NULL) {
+        TableNode *first = lt->table->entries;
+        while (first != NULL) {
+            i++;
+            first = getNextEntry(first);
+        }
+
+        lt = lt->next;
+    }
+
+    i= i * 8;
+    if (i % 16 != 0) i += 8;
+
+    return i;
+}

src/symbol_table.h

@@ -163,12 +163,14 @@ TableNode *getNextEntry(TableNode *tn);
 TableNode *printTableNode(TableNode *tn);
 int getElementOffset(TableNode *rec, char* id);
 int getRecPosition(TableNode* rec, char* id);
+int getStackSize();
 
 extern int yylex(void);
 extern char *yytext;
 extern int yyleng;
 extern int yychar;
 extern SymbolTable *cur;
+extern SymbolTable *top;
 extern int line_number;
 extern int column_number;
 extern FILE *yyin;

tests/programs/io.alpha

@@ -5,8 +5,6 @@ function entry: string2integer
 entry (arg) := {
     [integer: x; string: s; character: c; integer: result]
 
-    result := printS("hello world");
-
     s := inS(1);
     result := printS(s);