From 6fd5b82b2fb704346871579be15dc4ab2459de79 Mon Sep 17 00:00:00 2001
From: Yichao Yu <yyc1992@gmail.com>
Date: Wed, 1 Jul 2020 00:39:52 -0400
Subject: [PATCH] Fix CPU feature specification on virtualized x64.

---
 src/processor_x86.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/processor_x86.cpp b/src/processor_x86.cpp
index 0b8cfe8dccdce..624d8452bf8b2 100644
--- a/src/processor_x86.cpp
+++ b/src/processor_x86.cpp
@@ -840,6 +840,12 @@ get_llvm_target_noext(const TargetData<feature_sz> &data)
     features.push_back("+sse2");
     features.push_back("+mmx");
     features.push_back("+fxsr");
+#ifdef _CPU_X86_64_
+    // This is required to make LLVM happy if LLVM's feature based CPU arch guess
+    // returns a value that may not have 64bit support.
+    // This can happen with virtualization.
+    features.push_back("+64bit");
+#endif
     return std::make_pair(std::move(name), std::move(features));
 }