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opt_expr: Fix crash on $mul optimization with more zeros removed than Y has.

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Fixes #2221.
This commit is contained in:
Marcelina Kościelnicka 2020-07-05 00:55:38 +02:00
parent b004f09018
commit 7afcb72c98
2 changed files with 24 additions and 0 deletions
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16
tests/opt/bug2221.ys Normal file
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@ -0,0 +1,16 @@
read_verilog <<EOT
module test (
input [1:0] a,
input [1:0] b,
output [5:0] y
);
wire [5:0] aa = {a, 4'h0};
wire [5:0] bb = {b, 4'h0};
assign y = aa * bb;
endmodule
EOT
equiv_opt -assert opt_expr