iverilog/ivtest/ivltests/br_gh281.v

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module main;
int variable = 0;
// A void function returns no value, so can be called
// like a task, but without a warning about unused
// results.
function void test_incr(input int arg);
variable = variable + arg;
endfunction // test_incr
initial begin
variable = 0;
test_incr(5);
if (variable !== 5) begin
$display("FAILED");
$finish;
end
$display("PASSED");
end
endmodule // main