From f2a06875b604c00cbe96e54363f4f5d28935d610 Mon Sep 17 00:00:00 2001
From: Lei Zhang <antiagainst@google.com>
Date: Tue, 20 Oct 2020 13:04:02 -0400
Subject: [PATCH] Wrap CfgTraitsFor in namespace llvm to please GCC 5

---
 mlir/include/mlir/IR/Dominance.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mlir/include/mlir/IR/Dominance.h b/mlir/include/mlir/IR/Dominance.h
index 24d718362e13..7b41f8b0896d 100644
--- a/mlir/include/mlir/IR/Dominance.h
+++ b/mlir/include/mlir/IR/Dominance.h
@@ -45,10 +45,11 @@ public:
 
 } // namespace mlir
 
-template <>
-struct llvm::CfgTraitsFor<mlir::Block> {
+namespace llvm {
+template <> struct CfgTraitsFor<mlir::Block> {
   using CfgTraits = mlir::CfgTraits;
 };
+} // namespace llvm
 
 extern template class llvm::DominatorTreeBase<mlir::Block, false>;
 extern template class llvm::DominatorTreeBase<mlir::Block, true>;