commit 139c9ef45afeb7f76d3f612315506e30010b3204
author Johannes Doerfert <johannes@jdoerfert.de> Fri Dec 13 23:41:02 2019 -0600
committer Johannes Doerfert <johannes@jdoerfert.de> Fri Dec 13 23:51:59 2019 -0600
tree cf0142c5e196bf705dbb89818b58a2bf7438c324
parent dab7d515bac92f244230912aa8490aa17e41df4a

[Attributor] Annotate call sites of declarations with a callback

Even if a declaration is called, if there is a callback we might need
the information during CG-SCC traversal (D70767).

llvm/lib/Transforms/IPO/Attributor.cpp

diff --git a/llvm/lib/Transforms/IPO/Attributor.cpp b/llvm/lib/Transforms/IPO/Attributor.cpp
index 6e0807c..11f2f5c 100644
--- a/llvm/lib/Transforms/IPO/Attributor.cpp
+++ b/llvm/lib/Transforms/IPO/Attributor.cpp
@@ -5613,7 +5613,8 @@
     if (Function *Callee = CS.getCalledFunction()) {
       // Skip declerations except if annotations on their call sites were
       // explicitly requested.
-      if (!AnnotateDeclarationCallSites && Callee->isDeclaration())
+      if (!AnnotateDeclarationCallSites && Callee->isDeclaration() &&
+          !Callee->hasMetadata(LLVMContext::MD_callback))
         return true;
 
       if (!Callee->getReturnType()->isVoidTy() && !CS->use_empty()) {