1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 5933e029be8d3..753dd92f3071a 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -3589,12 +3589,19 @@ public:
   /// nonnull, if \p LHS is marked _Nonnull.
   void EmitNullabilityCheck(LValue LHS, llvm::Value *RHS, SourceLocation Loc);
 
+  /// An enumeration which makes it easier to specify whether or not an
+  /// operation is a subtraction.
+  enum { NotSubtraction = false, IsSubtraction = true };
+
   /// Same as IRBuilder::CreateInBoundsGEP, but additionally emits a check to
   /// detect undefined behavior when the pointer overflow sanitizer is enabled.
   /// \p SignedIndices indicates whether any of the GEP indices are signed.
+  /// \p IsSubtraction indicates whether the expression used to form the GEP
+  /// is a subtraction.
   llvm::Value *EmitCheckedInBoundsGEP(llvm::Value *Ptr,
                                       ArrayRef<llvm::Value *> IdxList,
                                       bool SignedIndices,
+                                      bool IsSubtraction,
                                       SourceLocation Loc,
                                       const Twine &Name = "");