diff --git a/llvm/lib/Passes/StandardInstrumentations.cpp b/llvm/lib/Passes/StandardInstrumentations.cpp
--- a/llvm/lib/Passes/StandardInstrumentations.cpp
+++ b/llvm/lib/Passes/StandardInstrumentations.cpp
@@ -726,8 +726,7 @@
 }
 
 void PrintIRInstrumentation::printAfterPassInvalidated(StringRef PassID) {
-  StringRef PassName = PIC->getPassNameForClassName(PassID);
-  if (!shouldPrintAfterPass(PassName))
+  if (!shouldPrintAfterPass(PassID))
     return;
 
   if (isIgnored(PassID))
diff --git a/llvm/test/Other/loop-print-after-pass-invalidated.ll b/llvm/test/Other/loop-print-after-pass-invalidated.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Other/loop-print-after-pass-invalidated.ll
@@ -0,0 +1,21 @@
+; RUN: opt < %s 2>&1 -disable-output \
+; RUN: 	   -passes='simple-loop-unswitch<nontrivial>' \
+; RUN:     -print-after=simple-loop-unswitch \
+; RUN:	   | FileCheck %s
+
+; CHECK: *** IR Dump After SimpleLoopUnswitchPass on for.cond ***
+; CHECK: *** IR Dump After SimpleLoopUnswitchPass on for.cond.us ***
+
+define void @loop(i1 %w)  {
+entry:
+  br label %for.cond
+; Loop:
+for.cond:                                         ; preds = %for.inc, %entry
+  br i1 %w, label %for.inc, label %if.then
+
+if.then:                                          ; preds = %for.cond
+  br label %for.inc
+
+for.inc:                                          ; preds = %if.then, %for.cond
+  br label %for.cond
+}