1 files changed, 86 insertions, 0 deletions
diff --git a/tests/opt/opt_dff_mux.ys b/tests/opt/opt_dff_mux.ys
new file mode 100644
index 000000000..ed01bed59
--- /dev/null
+++ b/tests/opt/opt_dff_mux.ys
@@ -0,0 +1,86 @@
+### CE and SRST matching.
+
+read_verilog -icells <<EOT
+
+module top(...);
+
+input CLK;
+input NE, NS;
+input EN;
+output [23:0] Q;
+input [23:0] D;
+input SRST;
+input ARST;
+input [1:0] CLR;
+input [1:0] SET;
+
+$dff #(.CLK_POLARITY(1'b1), .WIDTH(2)) ff0 (.CLK(CLK), .D(NS ? 2'h2 : NE ? D[1:0] : Q[1:0]), .Q(Q[1:0]));
+$dffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .WIDTH(2)) ff1 (.CLK(CLK), .EN(EN), .D(NS ? 2'h2 : NE ? D[3:2] : Q[3:2]), .Q(Q[3:2]));
+$adff #(.CLK_POLARITY(1'b1), .ARST_POLARITY(1'b1), .ARST_VALUE(2'h2), .WIDTH(2)) ff2 (.CLK(CLK), .ARST(ARST), .D(NS ? 2'h2 : NE ? D[5:4] : Q[5:4]), .Q(Q[5:4]));
+$adffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b0), .ARST_POLARITY(1'b1), .ARST_VALUE(2'h2), .WIDTH(2)) ff3 (.CLK(CLK), .EN(EN), .ARST(ARST), .D(NS ? 2'h2 : NE ? D[7:6] : Q[7:6]), .Q(Q[7:6]));
+$sdff #(.CLK_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff4 (.CLK(CLK), .SRST(SRST), .D(NS ? 2'h2 : NE ? D[9:8] : Q[9:8]), .Q(Q[9:8]));
+$sdffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff5 (.CLK(CLK), .EN(EN), .SRST(SRST), .D(NS ? 2'h2 : NE ? D[11:10] : Q[11:10]), .Q(Q[11:10]));
+$sdffce #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff6 (.CLK(CLK), .EN(EN), .SRST(SRST), .D(NS ? 2'h2 : NE ? D[13:12] : Q[13:12]), .Q(Q[13:12]));
+$dffsr #(.CLK_POLARITY(1'b1), .CLR_POLARITY(1'b1), .SET_POLARITY(1'b0), .WIDTH(2)) ff7 (.CLK(CLK), .SET(SET), .CLR(CLR), .D(NS ? 2'h2 : NE ? D[15:14] : Q[15:14]), .Q(Q[15:14]));
+$dffsre #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b0), .CLR_POLARITY(1'b1), .SET_POLARITY(1'b0), .WIDTH(2)) ff8 (.CLK(CLK), .EN(EN), .SET(SET), .CLR(CLR), .D(NS ? 2'h2 : NE ? D[17:16] : Q[17:16]), .Q(Q[17:16]));
+
+endmodule
+
+EOT
+
+design -save orig
+
+equiv_opt -undef -assert -multiclock opt_dff -keepdc
+design -load postopt
+clean
+select -assert-count 0 t:$dff
+select -assert-count 0 t:$dffe
+select -assert-count 0 t:$adff
+select -assert-count 2 t:$adffe
+select -assert-count 0 t:$dffsr
+select -assert-count 2 t:$dffsre
+select -assert-count 0 t:$sdff
+select -assert-count 3 t:$sdffe
+select -assert-count 2 t:$sdffce
+
+design -load orig
+
+equiv_opt -undef -assert -multiclock opt_dff -nodffe -nosdff
+design -load postopt
+clean
+select -assert-count 1 t:$dff
+select -assert-count 1 t:$dffe
+select -assert-count 1 t:$adff
+select -assert-count 1 t:$adffe
+select -assert-count 1 t:$dffsr
+select -assert-count 1 t:$dffsre
+select -assert-count 1 t:$sdff
+select -assert-count 1 t:$sdffe
+select -assert-count 1 t:$sdffce
+equiv_opt -undef -assert -multiclock opt_dff -nodffe
+design -load postopt
+clean
+select -assert-count 0 t:$dff
+select -assert-count 0 t:$dffe
+select -assert-count 1 t:$adff
+select -assert-count 1 t:$adffe
+select -assert-count 1 t:$dffsr
+select -assert-count 1 t:$dffsre
+select -assert-count 2 t:$sdff
+select -assert-count 1 t:$sdffe
+select -assert-count 2 t:$sdffce
+
+design -load orig
+
+equiv_opt -undef -assert -multiclock opt_dff -nosdff
+design -load postopt
+clean
+select -assert-count 0 t:$dff
+select -assert-count 2 t:$dffe
+select -assert-count 0 t:$adff
+select -assert-count 2 t:$adffe
+select -assert-count 0 t:$dffsr
+select -assert-count 2 t:$dffsre
+select -assert-count 0 t:$sdff
+select -assert-count 2 t:$sdffe
+select -assert-count 1 t:$sdffce