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Fix abc9 with (* keep *) wires

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This commit is contained in:
Eddie Hung 2019-04-23 16:11:14 -07:00
parent 9d122d3c51
commit bfd71e0990
2 changed files with 52 additions and 6 deletions
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38
tests/simple_abc9/abc9.v
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@ -104,3 +104,41 @@ always @(io or oe)
assign io[3:0] = oe ? ~latch[3:0] : 4'bz;
assign io[7:4] = !oe ? {latch[4], latch[7:3]} : 4'bz;
endmodule
module abc9_test015(input a, output b, input c);
assign b = ~a;
(* keep *) wire d;
assign d = ~c;
endmodule
module abc9_test016(input a, output b);
assign b = ~a;
(* keep *) reg c;
always @* c <= ~a;
endmodule
module abc9_test017(input a, output b);
assign b = ~a;
(* keep *) reg c;
always @* c = b;
endmodule
module abc9_test018(input a, output b, output c);
assign b = ~a;
(* keep *) wire [1:0] d;
assign c = &d;
endmodule
module abc9_test019(input a, output b);
assign b = ~a;
(* keep *) reg [1:0] c;
reg d;
always @* d <= &c;
endmodule
module abc9_test020(input a, output b);
assign b = ~a;
(* keep *) reg [1:0] c;
(* keep *) reg d;
always @* d <= &c;
endmodule