From 4fab8765b95e6a03cd513b2c4cb487d2c711fde2 Mon Sep 17 00:00:00 2001
From: Konstantin Pyzhov <konstantin.pyzhov@gmail.com>
Date: Mon, 24 Jun 2019 14:40:20 +0000
Subject: [PATCH] [CUDA][HIP] Don't set comdat attribute for CUDA device stub
 functions.\nDifferential Revision: https://reviews.llvm.org/D63277

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@364183 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenModule.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index d0f62beed9..87a1d45abf 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -3712,6 +3712,11 @@ static bool shouldBeInCOMDAT(CodeGenModule &CGM, const Decl &D) {
   if (!CGM.supportsCOMDAT())
     return false;
 
+  // Do not set COMDAT attribute for CUDA/HIP stub functions to prevent
+  // them being "merged" by the COMDAT Folding linker optimization.
+  if (D.hasAttr<CUDAGlobalAttr>())
+    return false;
+
   if (D.hasAttr<SelectAnyAttr>())
     return true;
 
-- 
2.40.0