Added tests/share for testing "share" supercell creation

tests/share/.gitignore

@@ -0,0 +1 @@
+temp

tests/share/generate.py

@@ -0,0 +1,41 @@
+#!/usr/bin/python
+
+from __future__ import division
+from __future__ import print_function
+
+import sys
+import random
+from contextlib import contextmanager
+
+@contextmanager
+def redirect_stdout(new_target):
+    old_target, sys.stdout = sys.stdout, new_target
+    try:
+        yield new_target
+    finally:
+        sys.stdout = old_target
+
+for idx in range(100):
+    with file('temp/uut_%05d.v' % idx, 'w') as f, redirect_stdout(f):
+        print('module uut_%05d(a, b, c, d, s, y);' % (idx))
+        ac_signed = random.choice(['', ' signed'])
+        bd_signed = random.choice(['', ' signed'])
+        op = random.choice(['+', '-', '*', '/', '%', '<<', '>>', '<<<', '>>>'])
+        print('  input%s [%d:0] a;' % (ac_signed, random.randint(0, 8)))
+        print('  input%s [%d:0] b;' % (bd_signed, random.randint(0, 8)))
+        print('  input%s [%d:0] c;' % (ac_signed, random.randint(0, 8)))
+        print('  input%s [%d:0] d;' % (bd_signed, random.randint(0, 8)))
+        print('  input s;')
+        print('  output [%d:0] y;' % random.randint(0, 8))
+        print('  assign y = s ? %s(a %s b) : %s(c %s d);' % (random.choice(['', '$signed', '$unsigned']), op, random.choice(['', '$signed', '$unsigned']), op))
+        print('endmodule')
+    with file('temp/uut_%05d.ys' % idx, 'w') as f, redirect_stdout(f):
+        print('read_verilog temp/uut_%05d.v' % idx)
+        print('proc;;')
+        print('copy uut_%05d gold' % idx)
+        print('rename uut_%05d gate' % idx)
+        print('share -aggressive gate')
+        print('miter -equiv -ignore_gold_x -make_outputs -make_outcmp gold gate miter')
+        print('flatten miter')
+        print('sat -verify -prove trigger 0 -show-inputs -show-outputs miter')
+ 

tests/share/run-test.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -e
+
+rm -rf temp
+mkdir -p temp
+echo "generating tests.."
+python generate.py
+
+echo "running tests.."
+for i in $( ls temp/*.ys | sed 's,[^0-9],,g; s,^0*\(.\),\1,g;' ); do
+	echo -n "[$i]"
+	idx=$( printf "%05d" $i )
+	../../yosys -ql temp/uut_${idx}.log temp/uut_${idx}.ys
+done
+echo
+