1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86EvexToVex.cpp b/llvm/lib/Target/X86/X86EvexToVex.cpp
index fb7217b2851..8352ebc037e 100644
--- a/llvm/lib/Target/X86/X86EvexToVex.cpp
+++ b/llvm/lib/Target/X86/X86EvexToVex.cpp
@@ -239,15 +239,15 @@ bool EvexToVexInstPass::CompressEvexToVexImpl(MachineInstr &MI) const {
 
 #ifndef NDEBUG
   // Make sure the tables are sorted.
-  static bool TableChecked = false;
-  if (!TableChecked) {
+  static std::atomic<bool> TableChecked(false);
+  if (!TableChecked.load(std::memory_order_relaxed)) {
     assert(std::is_sorted(std::begin(X86EvexToVex128CompressTable),
                           std::end(X86EvexToVex128CompressTable)) &&
            "X86EvexToVex128CompressTable is not sorted!");
     assert(std::is_sorted(std::begin(X86EvexToVex256CompressTable),
                           std::end(X86EvexToVex256CompressTable)) &&
            "X86EvexToVex256CompressTable is not sorted!");
-    TableChecked = true;
+    TablesChecked.store(true, std::memory_order_relaxed);
   }
 #endif