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-rw-r--r--tests/various/hierarchy.sh59
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diff --git a/tests/various/hierarchy.sh b/tests/various/hierarchy.sh
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+#!/usr/bin/env bash
+# Simple test of hierarchy -auto-top.
+
+set -e
+
+echo -n " TOP first - "
+../../yosys -s - <<- EOY | grep "Automatically selected TOP as design top module"
+ read_verilog << EOV
+ module TOP(a, y);
+ input a;
+ output [31:0] y;
+
+ aoi12 p [31:0] (a, y);
+ endmodule
+
+ module aoi12(a, y);
+ input a;
+ output y;
+ assign y = ~a;
+ endmodule
+ EOV
+ hierarchy -auto-top
+EOY
+
+echo -n " TOP last - "
+../../yosys -s - <<- EOY | grep "Automatically selected TOP as design top module"
+ read_verilog << EOV
+ module aoi12(a, y);
+ input a;
+ output y;
+ assign y = ~a;
+ endmodule
+
+ module TOP(a, y);
+ input a;
+ output [31:0] y;
+
+ aoi12 foo (a, y);
+ endmodule
+ EOV
+ hierarchy -auto-top
+EOY
+
+echo -n " no explicit top - "
+../../yosys -s - <<- EOY | grep "Automatically selected noTop as design top module."
+ read_verilog << EOV
+ module aoi12(a, y);
+ input a;
+ output y;
+ assign y = ~a;
+ endmodule
+
+ module noTop(a, y);
+ input a;
+ output [31:0] y;
+ endmodule
+ EOV
+ hierarchy -auto-top
+EOY