diff -r ea63f1680097 -r c22e983b3b6e src/compiler/SemanticAnalysis.cpp
--- a/src/compiler/SemanticAnalysis.cpp	Sun Nov 18 15:26:12 2012 -0800
+++ b/src/compiler/SemanticAnalysis.cpp	Sun Nov 18 15:50:41 2012 -0800
@@ -586,6 +586,31 @@
                               right);
 }
 
+void
+SemanticAnalysis::visitIncDecExpression(IncDecExpression *node)
+{
+    HLValue *lval = lvalue(node->expression());
+    if (!lval)
+        return;
+
+    if (!lval->type()->isInt32() && !lval->type()->isFloat()) {
+        assert(false);
+        return;
+    }
+
+    HIR *rval;
+    if (lval->type()->isInt32())
+        rval = new (pool_) HInteger(lval->type(), 1);
+    else
+        rval = new (pool_) HFloat(lval->type(), 1.0);
+
+    if (node->postfix()) {
+        assert(false);
+    } else {
+        hir_ = new (pool_) HStore(node->token(), lval, rval);
+    }
+}
+
 Type *
 SemanticAnalysis::coercionType(TokenKind token, HIR *left, HIR *right)
 {