Various fixes and improvements in write_smt2

backends/smt2/test_cells.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -ex
+
+rm -rf test_cells
+mkdir test_cells
+cd test_cells
+
+../../../yosys -p 'test_cell -n 2 -w test all /$alu /$macc /$fa /$lcu /$lut /$shift /$shiftx /$div /$mod'
+
+cat > miter.tpl <<- EOT
+; #model# (set-option :produce-models true)
+(set-logic QF_UFBV)
+%%
+(declare-fun s () miter_s)
+(assert (|miter_n trigger| s))
+(check-sat)
+; #model# (get-value ((|miter_n in_A| s) (|miter_n in_B| s) (|miter_n gold_Y| s) (|miter_n gate_Y| s) (|miter_n trigger| s)))
+EOT
+
+for x in test_*.il; do
+	x=${x%.il}
+	cat > $x.ys <<- EOT
+		read_ilang $x.il
+		copy gold gate
+
+		cd gate
+		techmap; opt; abc;;
+		cd ..
+
+		miter -equiv -flatten -make_outputs gold gate miter
+		hierarchy -check -top miter
+
+		dump
+		write_smt2 -bv -tpl miter.tpl $x.smt2
+	EOT
+	../../../yosys $x.ys
+	cvc4 $x.smt2 > $x.result
+	if ! grep unsat $x.result; then
+		echo "Proof failed! Extracting model..."
+		sed -i 's/^; #model# //' $x.smt2
+		cvc4 $x.smt2
+		exit 1
+	fi
+done