1 files changed, 6 insertions, 1 deletions

diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index aae2cac86a3d..c369123dd694 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -105,7 +105,8 @@ namespace llvm {
           MINumOperands(MINO), MIOperandInfo(MIOI) {}
     };
 
-    /// NumDefs - Number of def operands declared.
+    /// NumDefs - Number of def operands declared, this is the number of
+    /// elements in the instruction's (outs) list.
     ///
     unsigned NumDefs;
 
@@ -113,6 +114,10 @@ namespace llvm {
     /// type (which is a record).
     std::vector<OperandInfo> OperandList;
 
+    /// ImplicitDefs/ImplicitUses - These are lists of registers that are
+    /// implicitly defined and used by the instruction.
+    std::vector<Record*> ImplicitDefs, ImplicitUses;
+
     // Various boolean values we track for the instruction.
     bool isReturn;
     bool isBranch;