yosys/tests/opt/opt_expr_combined_assign.ys

read_verilog -sv <<EOT
module opt_expr_or_test(input [3:0] i, input [7:0] j, output [8:0] o);
wire[8:0] a = 8'b0;
initial begin
	a |= i;
	a |= j;
end
    assign o = a;
endmodule
EOT
proc
equiv_opt -assert opt_expr -fine
design -load postopt

select -assert-count 1 t:$or r:A_WIDTH=4 r:B_WIDTH=4 r:Y_WIDTH=4 %i %i %i

design -reset
read_verilog -sv <<EOT
module opt_expr_add_test(input [3:0] i, input [7:0] j, output [8:0] o);
wire[8:0] a = 8'b0;
initial begin
        a += i;
        a += j;
end
    assign o = a;
endmodule
EOT
proc
equiv_opt -assert opt_expr -fine
design -load postopt

select -assert-count 1 t:$add r:A_WIDTH=9 r:B_WIDTH=8 r:Y_WIDTH=9 %i %i %i

design -reset
read_verilog -sv <<EOT
module opt_expr_xor_test(input [3:0] i, input [7:0] j, output [8:0] o);
wire[8:0] a = 8'b0;
initial begin
        a ^= i;
        a ^= j;
end
    assign o = a;
endmodule
EOT
proc
equiv_opt -assert opt_expr -fine
design -load postopt

select -assert-count 1 t:$xor r:A_WIDTH=4 r:B_WIDTH=4 r:Y_WIDTH=4 %i %i %i