Reorganize and cleanup tests

llvm/tests/test_nuw_nsw.py

@@ -0,0 +1,48 @@
+import unittest
+from llvm.core import Module, Type, Builder
+from .support import TestCase, tests
+
+class TestNUWNSW(TestCase):
+    def make_module(self):
+        mod = Module.new('asdfa')
+        fnty = Type.function(Type.void(), [Type.int()] * 2)
+        func = mod.add_function(fnty, 'foo')
+        bldr = Builder.new(func.append_basic_block(''))
+        return mod, func, bldr
+
+    def has_nsw(self, inst, op):
+        self.assertTrue(('%s nsw' % op) in str(inst), "NSW flag does not work")
+
+    def has_nuw(self, inst, op):
+        self.assertTrue(('%s nuw' % op) in str(inst), "NUW flag does not work")
+
+    def _test_template(self, opf, opname):
+        mod, func, bldr = self.make_module()
+        a, b = func.args
+        self.has_nsw(opf(bldr, a, b, nsw=True), opname)
+        self.has_nuw(opf(bldr, a, b, nuw=True), opname)
+
+    def test_add_nuw_nsw(self):
+        self._test_template(Builder.add, 'add')
+
+    def test_sub_nuw_nsw(self):
+        self._test_template(Builder.sub, 'sub')
+
+    def test_mul_nuw_nsw(self):
+        self._test_template(Builder.mul, 'mul')
+
+    def test_shl_nuw_nsw(self):
+        self._test_template(Builder.shl, 'shl')
+
+    def test_neg_nuw_nsw(self):
+        mod, func, bldr = self.make_module()
+        a, b = func.args
+        self.has_nsw(bldr.neg(a, nsw=True), 'sub')
+        self.has_nuw(bldr.neg(a, nuw=True), 'sub')
+
+
+tests.append(TestNUWNSW)
+
+if __name__ == '__main__':
+    unittest.main()
+