ValueMapper: Unduplicate RF_NoModuleLevelChanges check, NFC

llvm-svn: 265761

1 files changed, 5 insertions, 8 deletions

diff --git a/llvm/lib/Transforms/Utils/ValueMapper.cpp b/llvm/lib/Transforms/Utils/ValueMapper.cpp
index ca48290cff9..27c7f1b3490 100644
--- a/llvm/lib/Transforms/Utils/ValueMapper.cpp
+++ b/llvm/lib/Transforms/Utils/ValueMapper.cpp
@@ -651,10 +651,12 @@ Optional<Metadata *> Mapper::mapSimpleMetadata(const Metadata *MD) {
   if (isa<MDString>(MD))
     return mapToSelf(MD);
 
-  if (auto *CMD = dyn_cast<ConstantAsMetadata>(MD)) {
-    if ((Flags & RF_NoModuleLevelChanges))
-      return mapToSelf(MD);
+  // This is a module-level metadata.  If nothing at the module level is
+  // changing, use an identity mapping.
+  if ((Flags & RF_NoModuleLevelChanges))
+    return mapToSelf(MD);
 
+  if (auto *CMD = dyn_cast<ConstantAsMetadata>(MD)) {
     // Disallow recursion into metadata mapping through mapValue.
     VM.disableMapMetadata();
     Value *MappedV = mapValue(CMD->getValue());
@@ -668,11 +670,6 @@ Optional<Metadata *> Mapper::mapSimpleMetadata(const Metadata *MD) {
 
   assert(isa<MDNode>(MD) && "Expected a metadata node");
 
-  // If this is a module-level metadata and we know that nothing at the
-  // module level is changing, then use an identity mapping.
-  if (Flags & RF_NoModuleLevelChanges)
-    return mapToSelf(MD);
-
   return None;
 }