[svn r92] Fixed support for statically initialized unions. lots of bugfixes as cleanups too.

test/union7.d

@@ -0,0 +1,48 @@
+module union7;
+
+pragma(LLVM_internal, "notypeinfo")
+struct Union
+{
+    union {
+        double g;
+        struct {
+            short s1,s2,s3,s4;
+        }
+    }
+    union {
+        float f;
+        long l;
+    }
+}
+
+Union a = { f:4f };
+Union b = { 3.0, f:2 };
+Union c = { l:42, g:2.0 };
+Union d = { s2:3 };
+Union e = { s1:3, s4:4, l:5 };
+
+void main()
+{
+    assert(a.f == 4f);
+    assert(a.g !<>= 0.0);
+    assert((a.l>>>32) == 0);
+
+    assert(b.g == 3.0);
+    assert(b.f == 2f);
+
+    assert(c.l == 42);
+    assert(c.g == 2.0);
+
+    assert(d.s1 == 0);
+    assert(d.s2 == 3);
+    assert(d.s3 == 0);
+    assert(d.s4 == 0);
+    {assert(d.f !<>= 0f);}
+    {}
+    assert(e.s1 == 3);
+    assert(e.s2 == 0);
+    assert(e.s3 == 0);
+    {assert(e.s4 == 4);}
+    {}
+    assert(e.l == 5);
+}