# HG changeset patch
# User anatofuz
# Date 1586846600 -32400
# Node ID 980e56f2e095e00504094d2b10961e1c049ac4d7
# Parent  e037d1dd73694b50f120926d0a2e292dd535c720
...

diff -r e037d1dd7369 -r 980e56f2e095 llvm/lib/Passes/PassBuilder.cpp
--- a/llvm/lib/Passes/PassBuilder.cpp	Tue Mar 24 17:35:46 2020 +0900
+++ b/llvm/lib/Passes/PassBuilder.cpp	Tue Apr 14 15:43:20 2020 +0900
@@ -637,6 +637,9 @@
   FunctionPassManager FPM;
   FPM.addPass(createFunctionToLoopPassAdaptor(
       LoopRotatePass(), EnableMSSALoopDependency, DebugLogging));
+#ifndef noCbC
+    FPM.addPass(TailCallElimPass());
+#endif
   MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
 
   // Add the profile lowering pass.
diff -r e037d1dd7369 -r 980e56f2e095 llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp	Tue Mar 24 17:35:46 2020 +0900
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp	Tue Apr 14 15:43:20 2020 +0900
@@ -930,8 +930,12 @@
   PM.add(createWholeProgramDevirtPass(ExportSummary, nullptr));
 
   // That's all we need at opt level 1.
-  if (OptLevel == 1)
+  if (OptLevel == 1) {
+#ifndef noCbC
+    PM.add(createTailCallEliminationPass(false));
+#endif
     return;
+   }
 
   // Now that we internalized some globals, see if we can hack on them!
   PM.add(createGlobalOptimizerPass());