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diff --git a/test/passes/split-exp/primop.fir b/test/passes/split-exp/primop.fir
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+; RUN: firrtl -i %s -o %s.v -X verilog -p c 2>&1 | tee %s.out | FileCheck %s
+
+;CHECK: Split Expressions
+circuit Top :
+ module Top :
+ output out : UInt<1>
+ output out2 : UInt<1>
+
+ wire m : UInt<1>[3]
+ m[0] := UInt(0)
+ m[1] := UInt(0)
+ m[2] := UInt(0)
+
+ wire x : UInt<1>
+ x := not(UInt(1))
+ infer accessor a = m[x]
+
+ out := a
+
+
+