Add a missing forward declaration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40896 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index e5d4b220fe08817221e7f03f4c1dda4fc6fc4199..da20d4ae114b6a25c2cb1f49faa8b3453268a45b 100644 (file)
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -25,6 +25,7 @@
 
 namespace llvm {
   class MachineInstr;
+  class MachineFunction;
   class TargetInstrInfo;
 
   class VirtRegMap {