From aef87980a97ccd062ecf4815ed9d6c5c7e5684eb Mon Sep 17 00:00:00 2001
From: Mandeep Singh Grang <mgrang@codeaurora.org>
Date: Wed, 3 Oct 2018 17:24:21 +0000
Subject: [COFF, ARM64] Add _ReadWriteBarrier intrinsic

Reviewers: rnk, mstorsjo, compnerd, TomTan, haripul, javed.absar

Reviewed By: rnk

Subscribers: kristof.beyls, chrib, jfb, cfe-commits

Differential Revision: https://reviews.llvm.org/D52809

llvm-svn: 343699
---
 clang/lib/CodeGen/CGBuiltin.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'clang/lib/CodeGen')

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index df71dbb4b4a..49c2b126dd8 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -6581,6 +6581,10 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
     return Builder.CreateCall(F);
   }
 
+  if (BuiltinID == AArch64::BI_ReadWriteBarrier)
+    return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
+                               llvm::SyncScope::SingleThread);
+
   // CRC32
   Intrinsic::ID CRCIntrinsicID = Intrinsic::not_intrinsic;
   switch (BuiltinID) {
-- 
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