2 files changed, 16 insertions, 1 deletions
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 7510d43cbba..6eed4246140 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -279,7 +279,7 @@ void initializeRegionPrinterPass(PassRegistry&);
 void initializeRegionViewerPass(PassRegistry&);
 void initializeRegisterCoalescerPass(PassRegistry&);
 void initializeRenameIndependentSubregsPass(PassRegistry&);
-void initializeReversePostOrderFunctionAttrsPass(PassRegistry&);
+void initializeReversePostOrderFunctionAttrsLegacyPassPass(PassRegistry&);
 void initializeRewriteStatepointsForGCPass(PassRegistry&);
 void initializeRewriteSymbolsPass(PassRegistry&);
 void initializeSCCPLegacyPassPass(PassRegistry &);
diff --git a/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h b/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
index 83fad94ef84..c44cc43fc0f 100644
--- a/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
+++ b/llvm/include/llvm/Transforms/IPO/FunctionAttrs.h
@@ -37,6 +37,21 @@ struct PostOrderFunctionAttrsPass : PassInfoMixin<PostOrderFunctionAttrsPass> {
 /// in post-order.
 Pass *createPostOrderFunctionAttrsLegacyPass();
 
+/// A pass to do RPO deduction and propagation of function attributes.
+///
+/// This pass provides a general RPO or "top down" propagation of
+/// function attributes. For a few (rare) cases, we can deduce significantly
+/// more about function attributes by working in RPO, so this pass
+/// provides the compliment to the post-order pass above where the majority of
+/// deduction is performed.
+// FIXME: Currently there is no RPO CGSCC pass structure to slide into and so
+// this is a boring module pass, but eventually it should be an RPO CGSCC pass
+// when such infrastructure is available.
+class ReversePostOrderFunctionAttrsPass
+    : public PassInfoMixin<ReversePostOrderFunctionAttrsPass> {
+public:
+  PreservedAnalyses run(Module &M, AnalysisManager<Module> &AM);
+};
 }
 
 #endif // LLVM_TRANSFORMS_IPO_FUNCTIONATTRS_H