proper flattening of nested structures +test

src/parser.js

@@ -1107,6 +1107,7 @@ function analyzer(data) {
       while (more) {
         more = false;
         values(item.types).forEach(function(type) {
+          if (type.flatIndexes) return;
           var ready = true;
           type.fields.forEach(function(field) {
             //print('// zz getT: ' + type.name_ + ' : ' + field);
@@ -1126,31 +1127,26 @@ function analyzer(data) {
             return;
           }
           type.flatSize = 0;
-          type.needsFlattening = false;
           var sizes = [];
           type.flatIndexes = type.fields.map(function(field) {
-            var curr = type.flatSize;
+            var soFar = type.flatSize;
+            var size = 1;
             if (isStructType(field)) {
-              dprint('types', 'type: ' + type.name_ + ' is so far of size ' + curr + ' and has ' + field + ' which is sized ' + item.types[field].flatSize);
-              var size = item.types[field].flatSize;
-              type.flatSize += size;
-              sizes.push(size);
-              type.needsFlattening = true;
-            } else {
-              type.flatSize ++;
+              size = item.types[field].flatSize;
             }
-            return curr;
+            type.flatSize += size;
+            sizes.push(size);
+            return soFar;
           });
-          dprint('types', 'type: ' + type.name_ + ' has FINAL size of ' + type.flatSize);
-          if (type.needsFlattening && dedup(sizes).length == 1) {
+          if (dedup(sizes).length == 1) {
             type.flatFactor = sizes[0];
           }
+          type.needsFlattening = (this.flatFactor != 1);
+          dprint('types', 'type: ' + type.name_ + ' : ' + JSON.stringify(type.fields));
+          dprint('types', '                        has final size of ' + type.flatSize + ', flatting: ' + type.needsFlattening + ' ? ' + (type.flatFactor ? type.flatFactor : JSON.stringify(type.flatIndexes)));
         });
       }
 
-      values(item.types).forEach(function(type) {
-        dprint('types', 'type: ' + type.name_);// + ' : ' + JSON.stringify(type.fields));
-      });
       item.typed = true;
       return [item];
     },

tests/runner.py

@@ -670,6 +670,55 @@ class T(unittest.TestCase):
           '''
         self.do_test(src, '*staticccz*')
 
+    def test_nestedstructs(self):
+        src = '''
+          #include <stdio.h>
+          #include "emscripten.h"
+
+          struct base {
+            int x;
+            float y;
+            union {
+              int a;
+              float b;
+            };
+            char c;
+          };
+
+          struct hashtableentry {
+            int key;
+            base data;
+          };
+
+          struct hashset {
+            typedef hashtableentry entry;
+            struct chain { entry elem; chain *next; };
+          //  struct chainchunk { chain chains[100]; chainchunk *next; };
+          };
+
+          struct hashtable : hashset {
+            hashtable() {
+              base *b = NULL;
+              entry *e = NULL;
+              chain *c = NULL;
+              printf("*%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n",
+                ES_SIZEOF(base),
+                int(&(b->x)), int(&(b->y)), int(&(b->a)), int(&(b->b)), int(&(b->c)), 
+                ES_SIZEOF(hashtableentry),
+                int(&(e->key)), int(&(e->data)), int(&(e->data.x)), int(&(e->data.y)), int(&(e->data.a)), int(&(e->data.b)), int(&(e->data.c)), 
+                ES_SIZEOF(hashset::chain),
+                int(&(c->elem)), int(&(c->next)), int(&(c->elem.key)), int(&(c->elem.data)), int(&(c->elem.data.x)), int(&(c->elem.data.y)), int(&(c->elem.data.a)), int(&(c->elem.data.b)), int(&(c->elem.data.c))
+              );
+            }
+          };
+
+          int main() {
+            hashtable t;
+            return 0;
+          }
+          '''
+        self.do_test(src, '*4,0,1,2,2,3|5,0,1,1,2,3,3,4|6,0,5,0,1,1,2,3,3,4*')
+
     def test_fannkuch(self):
         results = [ (1,0), (2,1), (3,2), (4,4), (5,7), (6,10), (7, 16), (8,22) ]
         for i, j in results: