ghw: add example with some aliasing

inputs/ghdl/oscar/ali.vhdl

@@ -0,0 +1,43 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity ali is 
+end entity;
+
+architecture foobar of ali is
+    signal large : std_logic_vector (6 downto 0) := "0000000";
+    signal full : std_logic_vector (6 downto 0);
+    signal msb4 : std_logic_vector (3 downto 0);
+    signal lsb3 : std_logic_vector (2 downto 0);
+    signal middle_a_4 : std_logic_vector (3 downto 0);
+    signal middle_b_3 : std_logic_vector (2 downto 0);
+    signal bit0 : std_logic;
+    signal bit6 : std_logic;
+    signal bit4 : std_logic;
+    signal mix  : std_logic_vector (3 downto 0);
+begin
+  msb4 <= large(6 downto 3);
+  lsb3 <= large(2 downto 0);
+  middle_a_4 <= large(5 downto 2);
+  middle_b_3 <= large(3 downto 1);
+  bit0 <= large(0);
+  bit6 <= large(6);
+  bit4 <= large(4);
+  mix(3 downto 2) <= large(5 downto 4);
+  mix(1 downto 0) <= large(2 downto 1);
+  full <= large;
+process 
+begin
+    wait for 50 ns;
+    large <= "1011001";    
+    wait for 50 ns;
+    large <= "1000101";
+    wait for 50 ns;
+    large <= "1010101";
+    wait for 50 ns;
+    assert false;
+end process;
+
+
+end architecture;
+