From 5cfcce12eb0446db614ae3f213f9c02ed4aa87a3 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@apple.com>
Date: Fri, 6 Nov 2015 23:55:38 +0000
Subject: Add 'notail' marker for call instructions.

This marker prevents optimization passes from adding 'tail' or
'musttail' markers to a call. Is is used to prevent tail call
optimization from being performed on the call.

rdar://problem/22667622

Differential Revision: http://reviews.llvm.org/D12923

llvm-svn: 252368
---
 llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')

diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index bc84619..a0029b2 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -5002,6 +5002,8 @@ std::error_code BitcodeReader::parseFunctionBody(Function *F) {
         TCK = CallInst::TCK_Tail;
       if (CCInfo & (1 << 14))
         TCK = CallInst::TCK_MustTail;
+      if (CCInfo & (1 << 16))
+        TCK = CallInst::TCK_NoTail;
       cast<CallInst>(I)->setTailCallKind(TCK);
       cast<CallInst>(I)->setAttributes(PAL);
       break;
-- 
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