testsuite/gna/issue818/tc4.vhdl


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entity tc4 is
end;

library ieee;
use ieee.std_logic_1164.all;

architecture behav of tc4 is
  signal clk : std_logic;
  signal tg : std_logic;
begin
  process (clk) is
  begin
    if falling_edge(clk) and tg then
      null;
    end if;
  end process;
end behav;