From 869942b8bd11b7c8e0e59375ea679ec901afcd95 Mon Sep 17 00:00:00 2001
From: Dmitri Makarov <dmakarov@users.noreply.github.com>
Date: Sat, 27 Mar 2021 08:41:17 +0100
Subject: [PATCH] [SOL][BPF] Allow misaligned loads (#7)

Co-authored-by: Jack May <jack@solana.com>
---
 llvm/lib/Target/BPF/BPFISelLowering.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/BPF/BPFISelLowering.cpp b/llvm/lib/Target/BPF/BPFISelLowering.cpp
index 9429a8467a03ac..e7a40cfab4f3d7 100644
--- a/llvm/lib/Target/BPF/BPFISelLowering.cpp
+++ b/llvm/lib/Target/BPF/BPFISelLowering.cpp
@@ -160,7 +160,13 @@ BPFTargetLowering::BPFTargetLowering(const TargetMachine &TM,
 }
 
 bool BPFTargetLowering::allowsMisalignedMemoryAccesses(
-    EVT VT, unsigned, unsigned, MachineMemOperand::Flags, bool *) const {
+    EVT VT, unsigned, unsigned, MachineMemOperand::Flags, bool *Fast) const {
+  if (!VT.isSimple()) {
+    return false;
+  }
+  if (Fast) {
+    *Fast = true;
+  }
   return true;
 }