[ThinLTO] Metadata linking for imported functions

[oota-llvm.git] / include / llvm / Transforms / Utils / ValueMapper.h

diff --git a/include/llvm/Transforms/Utils/ValueMapper.h b/include/llvm/Transforms/Utils/ValueMapper.h
index 5687bd21e9984f6859cbbb071bd0e377d534f715..7b1382854ba8d6510de69aaaa2c9d39f2c9f8fba 100644 (file)
--- a/include/llvm/Transforms/Utils/ValueMapper.h
+++ b/include/llvm/Transforms/Utils/ValueMapper.h
@@ -55,6 +55,12 @@ namespace llvm {
     /// It is called after the mapping is recorded, so it doesn't need to worry
     /// about recursion.
     virtual void materializeInitFor(GlobalValue *New, GlobalValue *Old);
+
+    /// If the client needs to handle temporary metadata it must implement
+    /// these methods.
+    virtual Metadata *mapTemporaryMetadata(Metadata *MD) { return nullptr; }
+    virtual void replaceTemporaryMetadata(const Metadata *OrigMD,
+                                          Metadata *NewMD) {}
   };
 
   /// RemapFlags - These are flags that the value mapping APIs allow.
@@ -78,6 +84,11 @@ namespace llvm {
     /// Any global values not in value map are mapped to null instead of
     /// mapping to self. Illegal if RF_IgnoreMissingEntries is also set.
     RF_NullMapMissingGlobalValues = 8,
+
+    /// Set when there is still temporary metadata that must be handled,
+    /// such as when we are doing function importing and will materialize
+    /// and link metadata as a postpass.
+    RF_HaveUnmaterializedMetadata = 16,
   };
 
   static inline RemapFlags operator|(RemapFlags LHS, RemapFlags RHS) {