From 772bf988cfdbc6dcf3b4082f77f6d972f844b9f0 Mon Sep 17 00:00:00 2001
From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Thu, 27 Dec 2018 03:30:42 +0000
Subject: [PATCH] Revert "[msan] Disable tail call optimization in msan rtl."

This reverts commit r350080, which breaks
* gcc as the host compiler
* some tests on ppc64

llvm-svn: 350083
---
 compiler-rt/lib/msan/CMakeLists.txt | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/compiler-rt/lib/msan/CMakeLists.txt b/compiler-rt/lib/msan/CMakeLists.txt
index 1fd0be1ae86b..15cc513c20e9 100644
--- a/compiler-rt/lib/msan/CMakeLists.txt
+++ b/compiler-rt/lib/msan/CMakeLists.txt
@@ -38,11 +38,6 @@ endif()
 # Prevent clang from generating libc calls.
 append_list_if(COMPILER_RT_HAS_FFREESTANDING_FLAG -ffreestanding MSAN_RTL_CFLAGS)
 
-# Tracking down https://bugs.llvm.org/show_bug.cgi?id=40162
-if(CMAKE_SYSTEM_NAME MATCHES "Linux")
-  list(APPEND MSAN_RTL_CFLAGS -fno-optimize-sibling-calls)
-endif()
-
 set(MSAN_RUNTIME_LIBRARIES)
 
 # Static runtime library.