diff --git a/llvm/__init__.py b/llvm/__init__.py
index c5e1123..395e698 100644
--- a/llvm/__init__.py
+++ b/llvm/__init__.py
@@ -8,7 +8,19 @@ __version__ = '0.9.1'
 from weakref import WeakValueDictionary
 from llvm._utils.finalizer import track as track_resource
 from llvm._utils.finalizer import OwnerMixin as _OwnerMixin
+from llvm import _core
 
+#===----------------------------------------------------------------------===
+# LLVM Version
+#===----------------------------------------------------------------------===
+
+version = _core.LLVMGetVersion()
+
+def require_version_at_least(major, minor):
+    '''Sentry to guard version requirement
+    '''
+    if version < (major, minor):
+        raise Exception(major, minor)
 
 #===----------------------------------------------------------------------===
 # Exceptions
diff --git a/llvm/_core.cpp b/llvm/_core.cpp
index e791439..cb7ae76 100644
--- a/llvm/_core.cpp
+++ b/llvm/_core.cpp
@@ -1065,7 +1065,10 @@ _wrap_obj2str(LLVMGetPassName, LLVMPassRef)
 _wrap_obj2none(LLVMPassDump, LLVMPassRef)
 
 _wrap_str2obj(LLVMCreateTargetLibraryInfo, LLVMPassRef)
+
+#if LLVM_VERSION_MAJOR >= 3 && LLVM_VERSION_MINOR >= 2
 _wrap_obj2obj(LLVMCreateTargetTransformInfo, LLVMTargetMachineRef, LLVMPassRef)
+#endif
 
 
 /*===----------------------------------------------------------------------===*/
@@ -1510,6 +1513,14 @@ _wrap_obj2none(LLVMDisposeGenericValue, LLVMGenericValueRef)
 /* Misc                                                                       */
 /*===----------------------------------------------------------------------===*/
 
+static PyObject *
+_wLLVMGetVersion(PyObject *self, PyObject *args)
+{
+    int major = LLVM_VERSION_MAJOR;
+    int minor = LLVM_VERSION_MINOR;
+    return Py_BuildValue("(i,i)", major, minor);
+}
+
 _wrap_objintlist2obj(LLVMGetIntrinsic, LLVMModuleRef, LLVMTypeRef,
     LLVMValueRef)
 
@@ -2108,9 +2119,13 @@ static PyMethodDef core_methods[] = {
     _method( LLVMPassDump )
 
     _method( LLVMCreateTargetLibraryInfo )
+
+#if LLVM_VERSION_MAJOR >= 3 && LLVM_VERSION_MINOR >= 2
     _method( LLVMCreateTargetTransformInfo )
+#endif
 
     /* Misc */
+    _method( LLVMGetVersion )
     _method( LLVMGetIntrinsic )
     _method( LLVMLoadLibraryPermanently )
     _method( LLVMParseEnvOpts )
diff --git a/llvm/extra.cpp b/llvm/extra.cpp
index a39579d..e200eec 100644
--- a/llvm/extra.cpp
+++ b/llvm/extra.cpp
@@ -155,6 +155,7 @@ const CodeModel::Model CodeModelMap[] = {
 
 } // end anony namespace
 
+#if LLVM_VERSION_MAJOR >= 3 && LLVM_VERSION_MINOR >= 2
 LLVMPassRef LLVMCreateTargetTransformInfo(LLVMTargetMachineRef tmref){
     using namespace llvm;
     TargetMachine * tm = unwrap(tmref);
@@ -162,6 +163,7 @@ LLVMPassRef LLVMCreateTargetTransformInfo(LLVMTargetMachineRef tmref){
                                          tm->getVectorTargetTransformInfo());
     return wrap(tti);
 }
+#endif
 
 LLVMPassRef LLVMCreateTargetLibraryInfo(const char * triple){
     using namespace llvm;
diff --git a/llvm/extra.h b/llvm/extra.h
index bfd4651..6080bdb 100644
--- a/llvm/extra.h
+++ b/llvm/extra.h
@@ -54,12 +54,15 @@
 extern "C" {
 #endif
 
+
+#if LLVM_VERSION_MAJOR >= 3 && LLVM_VERSION_MINOR >= 2
 /*
  * Wraps new TargetTransformInfo(
  *          TargetMachine::getScalarTargetTransformInfo,
  *          TargetMachine::getVectorTargetTransformInfo)
  */
 LLVMPassRef LLVMCreateTargetTransformInfo(LLVMTargetMachineRef tmref);
+#endif 
 
 /*
  * Wraps new TargetLibraryInfo
diff --git a/llvm/passes.py b/llvm/passes.py
index bca8caf..f7cf0fe 100644
--- a/llvm/passes.py
+++ b/llvm/passes.py
@@ -89,10 +89,10 @@ class PassManagerBuilder(llvm.Handle):
     vectorize = property(_get_vectorize, _set_vectorize)
 
     def _set_loop_vectorize(self, enable):
-        try:
+        if llvm.version >= (3, 2):
             _core.LLVMPassManagerBuilderSetLoopVectorize(self.ptr,
                                                          int(bool(enable)))
-        except AttributeError:
+        else:
             warnings.warn("Ignored. LLVM-3.1 & prior do not support loop vectorizer.")
 
     def _get_loop_vectorize(self):
@@ -326,9 +326,11 @@ class TargetLibraryInfo(Pass):
 class TargetTransformInfo(Pass):
     @staticmethod
     def new(targetmachine):
+        llvm.require_version_at_least(3, 2)
         ptr = _core.LLVMCreateTargetTransformInfo(targetmachine.ptr)
         return TargetTransformInfo(ptr)
 
+
 #===----------------------------------------------------------------------===
 # Helpers
 #===----------------------------------------------------------------------===
@@ -365,13 +367,15 @@ def build_pass_managers(tm, opt=2, loop_vectorize=False, vectorize=False,
     if pm:
         pm.add(tm.target_data)
         pm.add(TargetLibraryInfo.new(tm.triple))
-        pm.add(TargetTransformInfo.new(tm))
+        if llvm.version >= (3, 2):
+            pm.add(TargetTransformInfo.new(tm))
         pmb.populate(pm)
 
     if fpm:
         fpm.add(tm.target_data)
         fpm.add(TargetLibraryInfo.new(tm.triple))
-        fpm.add(TargetTransformInfo.new(tm))
+        if llvm.version >= (3, 2):
+            fpm.add(TargetTransformInfo.new(tm))
         pmb.populate(fpm)
         fpm.initialize()
 
diff --git a/test/loopvectorize.py b/test/loopvectorize.py
index 27db483..ff7cb10 100644
--- a/test/loopvectorize.py
+++ b/test/loopvectorize.py
@@ -1,13 +1,17 @@
 from llvm.core import *
 from llvm.passes import *
 from llvm.ee import *
+import llvm
 from os.path import dirname, join as join_path
 
+
 import unittest
 import re
 
 class TestLoopVectorizer(unittest.TestCase):
     def test_loop_vectorizer(self):
+        if llvm.version <= (3, 1):
+            return # SKIP
 
         re_vector = re.compile("<\d+ x \w+>")
 
diff --git a/test/pass.py b/test/pass.py
index c9ea654..20429d7 100644
--- a/test/pass.py
+++ b/test/pass.py
@@ -1,6 +1,7 @@
 from llvm.core import *
 from llvm.passes import *
 from llvm.ee import *
+import llvm
 import unittest
 
 class TestPass(unittest.TestCase):
@@ -26,11 +27,12 @@ class TestPass(unittest.TestCase):
         self.assertTrue(tli.description)
         pm.add(tli)
 
-        tti = TargetTransformInfo.new(tm)
-        self.assertFalse(tti.name)
-        self.assertTrue(tti.description)
+        if llvm.version >= (3, 2):
+            tti = TargetTransformInfo.new(tm)
+            self.assertFalse(tti.name)
+            self.assertTrue(tti.description)
 
-        pm.add(tti)
+            pm.add(tti)
 
         pmb = PassManagerBuilder.new()
         pmb.opt_level = 3