commit f95553923f95f0c87b7ebbe5f8e41d313292dfda
author Johannes Doerfert <johannes@jdoerfert.de> Fri Jan 10 14:49:45 2020 -0600
committer Johannes Doerfert <johannes@jdoerfert.de> Tue Feb 11 11:02:59 2020 -0600
tree a7d3549a6ec07437f8f74f48ed484eef6b3da2d0
parent 4c62a358602e88abc275009bd4170b891eb07870

[Attributor] Return uses do not free pointers

If a pointer is returned that does not mean it is freed in the current
(function) scope. We can ignore such uses in AANoFree.

llvm/lib/Transforms/IPO/Attributor.cpp

diff --git a/llvm/lib/Transforms/IPO/Attributor.cpp b/llvm/lib/Transforms/IPO/Attributor.cpp
index 52eafe5..3aebc97 100644
--- a/llvm/lib/Transforms/IPO/Attributor.cpp
+++ b/llvm/lib/Transforms/IPO/Attributor.cpp
@@ -1772,6 +1772,8 @@
         Follow = true;
         return true;
       }
+      if (isa<ReturnInst>(UserI))
+        return true;
 
       // Unknown user.
       return false;