From f987cceb134200d575beda611fe190535155c7a2 Mon Sep 17 00:00:00 2001
From: serge-sans-paille <sguelton@redhat.com>
Date: Thu, 4 Jun 2020 22:24:03 +0200
Subject: [PATCH] Correctly report modified status for TailRecursionElimination

Differential Revision: https://reviews.llvm.org/D81232
---
 llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
index 4263dddd9737..5bb1d54d7d12 100644
--- a/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
+++ b/llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
@@ -818,7 +818,7 @@ bool TailRecursionEliminator::eliminate(Function &F,
   // If this function is a varargs function, we won't be able to PHI the args
   // right, so don't even try to convert it...
   if (F.getFunctionType()->isVarArg())
-    return false;
+    return MadeChange;
 
   // If false, we cannot perform TRE on tail calls marked with the 'tail'
   // attribute, because doing so would cause the stack size to increase (real