From f9151a4c5438587052ec5f4a344b78db4cbfb96d Mon Sep 17 00:00:00 2001
From: drahn <drahn@openbsd.org>
Date: Fri, 14 May 2021 01:15:54 +0000
Subject: [PATCH] Initial enablment of EMULTLS on RiscV Uncertain if this is
 100% correct, however this enables self hosting using clang.

---
 gnu/llvm/llvm/lib/Target/RISCV/RISCVISelLowering.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/llvm/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/gnu/llvm/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 03d9eefd59d..17f06abbfb3 100644
--- a/gnu/llvm/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/gnu/llvm/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -634,6 +634,10 @@ SDValue RISCVTargetLowering::getDynamicTLSAddr(GlobalAddressSDNode *N,
 
 SDValue RISCVTargetLowering::lowerGlobalTLSAddress(SDValue Op,
                                                    SelectionDAG &DAG) const {
+  const GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
+  if (DAG.getTarget().useEmulatedTLS())
+    return LowerToTLSEmulatedModel(GA, DAG);
+
   SDLoc DL(Op);
   EVT Ty = Op.getValueType();
   GlobalAddressSDNode *N = cast<GlobalAddressSDNode>(Op);
-- 
2.20.1