diff --git a/ChangeLog b/ChangeLog
index 0a3c501..e08b7bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Sun Sep  7 07:37:34 2008  Minero Aoki  <aamine@loveruby.net>
+
+	* net/loveruby/cflat/compiler/CodeGenerator.java: opassign should
+	  not spill DX because division uses DX.
+
+	* net/loveruby/cflat/ast/PtrMemberNode.java: #dereferedType should
+	  return Type instead of ComplexType because DereferenceChecker
+	  checks derefered type by this method.
+
+	* test: test ptr->memb with complex pointer expression.
+
 Sun Sep  7 06:50:56 2008  Minero Aoki  <aamine@loveruby.net>
 
 	* net/loveruby/cflat/compiler/CodeGenerator.java: calculate LHS
diff --git a/net/loveruby/cflat/ast/PtrMemberNode.java b/net/loveruby/cflat/ast/PtrMemberNode.java
index 3c7f5ff..52310cb 100644
--- a/net/loveruby/cflat/ast/PtrMemberNode.java
+++ b/net/loveruby/cflat/ast/PtrMemberNode.java
@@ -13,10 +13,10 @@ public class PtrMemberNode extends ExprNode {
     }
 
     public Type type() {
-        return dereferedType().memberType(member);
+        return dereferedComplexType().memberType(member);
     }
 
-    public ComplexType dereferedType() {
+    public ComplexType dereferedComplexType() {
         try {
             PointerType pt = expr.type().getPointerType();
             return pt.baseType().getComplexType();
@@ -26,6 +26,16 @@ public class PtrMemberNode extends ExprNode {
         }
     }
 
+    public Type dereferedType() {
+        try {
+            PointerType pt = expr.type().getPointerType();
+            return pt.baseType();
+        }
+        catch (ClassCastException err) {
+            throw new SemanticError(err.getMessage());
+        }
+    }
+
     public ExprNode expr() {
         return expr;
     }
@@ -47,7 +57,7 @@ public class PtrMemberNode extends ExprNode {
     }
 
     public long offset() {
-        return dereferedType().memberOffset(member);
+        return dereferedComplexType().memberOffset(member);
     }
 
     public Location location() {
diff --git a/net/loveruby/cflat/compiler/CodeGenerator.java b/net/loveruby/cflat/compiler/CodeGenerator.java
index 906b432..7bbc38d 100644
--- a/net/loveruby/cflat/compiler/CodeGenerator.java
+++ b/net/loveruby/cflat/compiler/CodeGenerator.java
@@ -766,11 +766,12 @@ public class CodeGenerator extends Visitor {
         else {
             push(reg("ax"));
             compileLHS(node.lhs());
-//FIXME: DANGER
             mov(reg("ax"), reg("dx"));
             load(node.type(), mem(reg("dx")), reg("ax"));
             pop(reg("cx"));
+            push(reg("dx"));
             compileBinaryOp(node.operator(), node.type());
+            pop(reg("dx"));
             save(node.type(), reg("ax"), mem(reg("dx")));
         }
     }
diff --git a/test/opassign.cb b/test/opassign.cb
index de474f2..0150bba 100644
--- a/test/opassign.cb
+++ b/test/opassign.cb
@@ -58,6 +58,35 @@ main(int argc, char **argv)
         printf(";%d", *p);
     }
 
+    // complex LHS
+    {
+        int x = 0;
+        int *p = &x;
+
+        *p += 1;
+        printf(";%d", *p);
+
+        p[0] += 2;
+        printf(";%d", *p);
+
+        *&*p += 3;
+        printf(";%d", *p);
+    }
+
+    // complex LHS #2
+    {
+        int[2] a;
+
+        a[0] = 77;
+        a[1] = 78;
+
+        a[0] += 5;
+        printf(";%d", a[0]);
+
+        *(a + 1) += 3;
+        printf(";%d", a[1]);
+    }
+
     puts("");
     return 0;
 }
diff --git a/test/ptrmemb.cb b/test/ptrmemb.cb
index 3ceff13..2d733ef 100644
--- a/test/ptrmemb.cb
+++ b/test/ptrmemb.cb
@@ -32,7 +32,20 @@ main(int argc, char **argv)
     (*uptr).x = 6;
     printf(";%d", (*uptr).y);
 
+    printf(";%d", f()->x);
+    printf(";%d", f()->y);
+
     puts("");
 
     return 0;
 }
+
+static struct s ss;
+
+struct s *
+f(void)
+{
+    ss.x = 77;
+    ss.y = 78;
+    return &ss;
+}
diff --git a/test/test_cbc.sh b/test/test_cbc.sh
index 244eddd..ceeb5b0 100644
--- a/test/test_cbc.sh
+++ b/test/test_cbc.sh
@@ -93,7 +93,7 @@ test_09_cmp() {
 
 test_10_assign() {
     assert_out "1;2;2;3;4;5;6;7;8;8;9;10;11;777;S;12" ./assign
-    assert_out "3;4;3;12;4;1;1;7;5;1;4;e;H;76;75" ./opassign
+    assert_out "3;4;3;12;4;1;1;7;5;1;4;e;H;76;75;1;3;6;82;81" ./opassign
     assert_out "0;1;2;2;3;3;4" ./inc
     assert_out "4;3;2;2;1;1;0" ./dec
 }
@@ -186,7 +186,7 @@ test_22_pointer() {
     assert_out "777" ./pointer2
     assert_out "1;777;3;4;1;777;3;4" ./pointer3
     assert_out "777" ./pointer4
-    assert_out "1;2;3;4;5;6" ./ptrmemb
+    assert_out "1;2;3;4;5;6;77;78" ./ptrmemb
     assert_compile_error deref-semcheck1.cb
     assert_compile_error deref-semcheck2.cb
     assert_compile_error deref-semcheck3.cb