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-rw-r--r--tests/ecp5/rom.ys1
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/ecp5/rom.ys b/tests/ecp5/rom.ys
index 8a52749a1..98645ae43 100644
--- a/tests/ecp5/rom.ys
+++ b/tests/ecp5/rom.ys
@@ -1,4 +1,5 @@
read_verilog rom.v
+hierarchy -top top
proc
flatten
equiv_opt -assert -map +/ecp5/cells_sim.v synth_ecp5 # equivalency check