1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
index 3a9347a3e0a..ec2ef6e575f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
@@ -119,6 +119,9 @@ protected:
   /// The kind of location description being produced.
   enum { Unknown = 0, Register, Memory, Implicit };
 
+  /// The flags of location description being produced.
+  enum { EntryValue = 1 };
+
   unsigned LocationKind : 3;
   unsigned LocationFlags : 2;
   unsigned DwarfVersion : 4;
@@ -140,6 +143,10 @@ public:
     return LocationKind == Implicit;
   }
 
+  bool isEntryValue() const {
+    return LocationFlags & EntryValue;
+  }
+
   Optional<uint8_t> TagOffset;
 
 protected:
@@ -252,6 +259,11 @@ public:
     LocationKind = Memory;
   }
 
+  /// Lock this down to become an entry value location.
+  void setEntryValueFlag() {
+    LocationFlags |= EntryValue;
+  }
+
   /// 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.
@@ -266,6 +278,9 @@ public:
                                DIExpressionCursor &Expr, unsigned MachineReg,
                                unsigned FragmentOffsetInBits = 0);
 
+  /// Emit entry value dwarf operation.
+  void addEntryValueExpression(DIExpressionCursor &ExprCursor);
+
   /// Emit all remaining operations in the DIExpressionCursor.
   ///
   /// \param FragmentOffsetInBits     If this is one fragment out of multiple