Fix simple pointer dereferences.

It turns out no code was being generated for x = *y. Ouch. I suspect I need
to take a better look at expr_deref at some time in the not too distant
future.

Conflicts:
	tools/qfcc/source/statements.c

tools/qfcc/source/statements.c

@@ -662,6 +662,18 @@ expr_deref (sblock_t *sblock, expr_t *deref, operand_t **op)
 		*op = new_operand (op_pointer);
 		(*op)->type = low_level_type (e->e.value.v.pointer.type);
 		(*op)->o.pointer = &e->e.value.v.pointer;
+	} else {
+		statement_t *s;
+		operand_t  *ptr = 0;
+
+		sblock = statement_subexpr (sblock, e, &ptr);
+		if (!*op)
+			*op = temp_operand (type);
+		s = new_statement (".", deref);
+		s->opa = ptr;
+		s->opb = short_operand (0);
+		s->opc = *op;
+		sblock_add_statement (sblock, s);
 	}
 	return sblock;
 }

tools/qfcc/test/ptrderef.r

@@ -0,0 +1,14 @@
+void
+ptrderef (int *to, int *from)
+{
+	int x;
+
+	x = *from;
+	x = *from++;
+	x = *++from;
+	//x = ++*from; FIXME syntax error (valid C)
+	to = from++;
+	to = ++from;
+	*to = *from++;
+	*to = *++from;
+}