From 0a6fde48954471957234ea42b7645425d8765f5f Mon Sep 17 00:00:00 2001
From: Erich Keane <erich.keane@intel.com>
Date: Tue, 16 Jan 2018 19:49:52 +0000
Subject: Move target MV resolver to COMDAT

As reported here: https://bugs.llvm.org/show_bug.cgi?id=35921
The resolver functions should be in their own
COMDAT regions. This patch sets that up.

Differential Revision: https://reviews.llvm.org/D42110

llvm-svn: 322592
---
 clang/lib/CodeGen/CodeGenModule.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index acf6e4d63cc..fb16c8f2607 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2185,6 +2185,9 @@ void CodeGenModule::emitMultiVersionFunctions() {
 
     llvm::Function *ResolverFunc = cast<llvm::Function>(
         GetGlobalValue((getMangledName(GD) + ".resolver").str()));
+    if (supportsCOMDAT())
+      ResolverFunc->setComdat(
+          getModule().getOrInsertComdat(ResolverFunc->getName()));
     std::stable_sort(
         Options.begin(), Options.end(),
         std::greater<CodeGenFunction::MultiVersionResolverOption>());
-- 
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