add exact flag to IRBuilder

llvm/test_llvmpy.py

@@ -1511,6 +1511,37 @@ class TestNUWNSW(TestCase):
 
 tests.append(TestNUWNSW)
 
+
+class TestExact(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_exact(self, inst, op):
+        self.assertTrue(('%s exact' % op) in str(inst), "exact flag does not work")
+
+    def _test_template(self, opf, opname):
+        mod, func, bldr = self.make_module()
+        a, b = func.args
+        self.has_exact(opf(bldr, a, b, exact=True), opname)
+
+    def test_udiv_exact(self):
+        self._test_template(Builder.udiv, 'udiv')
+
+    def test_sdiv_exact(self):
+        self._test_template(Builder.sdiv, 'sdiv')
+
+    def test_lshr_exact(self):
+        self._test_template(Builder.lshr, 'lshr')
+
+    def test_ashr_exact(self):
+        self._test_template(Builder.ashr, 'ashr')
+
+tests.append(TestExact)
+
 # ---------------------------------------------------------------------------
 
 def run(verbosity=1):