[svn r80] Fixed union literals

test/union4.d

@@ -0,0 +1,16 @@
+module union4;
+
+pragma(LLVM_internal, "notypeinfo")
+union U {
+    struct { float x,y,z; }
+    float[3] xyz;
+}
+
+void main() {
+    const float[3] a = [1f,2,3];
+    U u = U(1,2,3);
+    assert(u.xyz == a);
+    assert(u.x == 1);
+    assert(u.y == 2);
+    assert(u.z == 3);
+}

test/union5.d

@@ -0,0 +1,39 @@
+module union5;
+
+pragma(LLVM_internal, "notypeinfo")
+{
+    union S
+    {
+        T t;
+        U u;
+        uint i;
+        struct {
+            ushort sl,sh;
+        }
+    }
+
+    struct T
+    {
+        int i;
+    }
+
+    struct U
+    {
+        float f;
+    }
+}
+
+void main()
+{
+    S s;
+    assert(s.t.i == 0);
+    assert(s.u.f == 0);
+    s.t.i = -1;
+    assert(s.i == 0xFFFF_FFFF);
+    float f = 3.1415;
+    s.u.f = f;
+    uint pi = *cast(uint*)&f;
+    assert(s.i == pi);
+    assert(s.sl == (pi&0xFFFF));
+    assert(s.sh == (pi>>>16));
+}