More pass manager debugging outputs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51930 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index b44e10de95b641df092c8d5ad840857ee123c9e6..cd7138cad13194154fa14527fd1116da8097907e 100644 (file)
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -665,6 +665,11 @@ void PMDataManager::removeDeadPasses(Pass *P, const char *Msg,
 
   TPM->collectLastUses(DeadPasses, P);
 
+  if (PassDebugging >= Details) {
+    cerr << " -*- " <<  P->getPassName();
+    cerr << " is the last users of following passes. Free them\n";
+  }
+
   for (SmallVector<Pass *, 12>::iterator I = DeadPasses.begin(),
          E = DeadPasses.end(); I != E; ++I) {