diff --git a/llvm/include/llvm/IR/PassManager.h b/llvm/include/llvm/IR/PassManager.h
--- a/llvm/include/llvm/IR/PassManager.h
+++ b/llvm/include/llvm/IR/PassManager.h
@@ -536,12 +536,6 @@
       // Finally, intersect the preserved analyses to compute the aggregate
       // preserved set for this pass manager.
       PA.intersect(std::move(PassPA));
-
-      // FIXME: Historically, the pass managers all called the LLVM context's
-      // yield function here. We don't have a generic way to acquire the
-      // context and it isn't yet clear what the right pattern is for yielding
-      // in the new pass manager so it is currently omitted.
-      //IR.getContext().yield();
     }
 
     // Invalidation was handled after each pass in the above loop for the
diff --git a/llvm/lib/Analysis/CGSCCPassManager.cpp b/llvm/lib/Analysis/CGSCCPassManager.cpp
--- a/llvm/lib/Analysis/CGSCCPassManager.cpp
+++ b/llvm/lib/Analysis/CGSCCPassManager.cpp
@@ -119,12 +119,6 @@
     // Finally, we intersect the final preserved analyses to compute the
     // aggregate preserved set for this pass manager.
     PA.intersect(std::move(PassPA));
-
-    // FIXME: Historically, the pass managers all called the LLVM context's
-    // yield function here. We don't have a generic way to acquire the
-    // context and it isn't yet clear what the right pattern is for yielding
-    // in the new pass manager so it is currently omitted.
-    // ...getContext().yield();
   }
 
   // Before we mark all of *this* SCC's analyses as preserved below, intersect
diff --git a/llvm/lib/Transforms/Scalar/LoopPassManager.cpp b/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
--- a/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopPassManager.cpp
@@ -124,12 +124,6 @@
     // notify the updater, otherwise U.ParentL might gets outdated and triggers
     // assertion failures in addSiblingLoops and addChildLoops.
     U.setParentLoop(L.getParentLoop());
-
-    // FIXME: Historically, the pass managers all called the LLVM context's
-    // yield function here. We don't have a generic way to acquire the
-    // context and it isn't yet clear what the right pattern is for yielding
-    // in the new pass manager so it is currently omitted.
-    // ...getContext().yield();
   }
   return PA;
 }
@@ -173,12 +167,6 @@
     // notify the updater, otherwise U.ParentL might gets outdated and triggers
     // assertion failures in addSiblingLoops and addChildLoops.
     U.setParentLoop(L.getParentLoop());
-
-    // FIXME: Historically, the pass managers all called the LLVM context's
-    // yield function here. We don't have a generic way to acquire the
-    // context and it isn't yet clear what the right pattern is for yielding
-    // in the new pass manager so it is currently omitted.
-    // ...getContext().yield();
   }
   return PA;
 }