1 files changed, 10 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
index ec2ef6e575f..9f9baf8c1a1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
@@ -120,7 +120,7 @@ protected:
   enum { Unknown = 0, Register, Memory, Implicit };
 
   /// The flags of location description being produced.
-  enum { EntryValue = 1 };
+  enum { EntryValue = 1, CallSiteParamValue };
 
   unsigned LocationKind : 3;
   unsigned LocationFlags : 2;
@@ -147,6 +147,10 @@ public:
     return LocationFlags & EntryValue;
   }
 
+  bool isParameterValue() {
+    return LocationFlags & CallSiteParamValue;
+  }
+
   Optional<uint8_t> TagOffset;
 
 protected:
@@ -264,6 +268,11 @@ public:
     LocationFlags |= EntryValue;
   }
 
+  /// Lock this down to become a call site parameter location.
+  void setCallSiteParamValueFlag() {
+    LocationFlags |= CallSiteParamValue;
+  }
+
   /// Emit a machine register location. As an optimization this may also consume
   /// the prefix of a DwarfExpression if a more efficient representation for
   /// combining the register location and the first operation exists.