Use error_code in GVMaterializer.

They just propagate out the bitcode reader error, so we don't need a new enum.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Module.cpp b/lib/IR/Module.cpp
index 58115ef..3dd1f7e 100644
--- a/lib/IR/Module.cpp
+++ b/lib/IR/Module.cpp
@@ -401,9 +401,15 @@
 }
 
 bool Module::Materialize(GlobalValue *GV, std::string *ErrInfo) {
-  if (Materializer)
-    return Materializer->Materialize(GV, ErrInfo);
-  return false;
+  if (!Materializer)
+    return false;
+
+  error_code EC = Materializer->Materialize(GV);
+  if (!EC)
+    return false;
+  if (ErrInfo)
+    *ErrInfo = EC.message();
+  return true;
 }
 
 void Module::Dematerialize(GlobalValue *GV) {
@@ -414,7 +420,12 @@
 bool Module::MaterializeAll(std::string *ErrInfo) {
   if (!Materializer)
     return false;
-  return Materializer->MaterializeModule(this, ErrInfo);
+  error_code EC = Materializer->MaterializeModule(this);
+  if (!EC)
+    return false;
+  if (ErrInfo)
+    *ErrInfo = EC.message();
+  return true;
 }
 
 bool Module::MaterializeAllPermanently(std::string *ErrInfo) {