1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86Subtarget.h b/llvm/lib/Target/X86/X86Subtarget.h
index d8cf98b6e2a..06df8689fe8 100644
--- a/llvm/lib/Target/X86/X86Subtarget.h
+++ b/llvm/lib/Target/X86/X86Subtarget.h
@@ -164,6 +164,9 @@ protected:
   /// Processor has LAHF/SAHF instructions.
   bool HasLAHFSAHF;
 
+  /// Processor has MONITORX/MWAITX instructions.
+  bool HasMWAITX;
+
   /// Processor has Prefetch with intent to Write instruction
   bool HasPFPREFETCHWT1;
 
@@ -421,6 +424,7 @@ public:
   bool hasPRFCHW() const { return HasPRFCHW; }
   bool hasRDSEED() const { return HasRDSEED; }
   bool hasLAHFSAHF() const { return HasLAHFSAHF; }
+  bool hasMWAITX() const { return HasMWAITX; }
   bool isBTMemSlow() const { return IsBTMemSlow; }
   bool isSHLDSlow() const { return IsSHLDSlow; }
   bool isUnalignedMem16Slow() const { return IsUAMem16Slow; }