add some forward defs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23100 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 0dc8836242d68218197db337e2c3ad0d542a651c..590de20dc81e4cf79218d5dfc6a9872af4636882 100644 (file)
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -35,6 +35,8 @@ namespace llvm {
   class SDNode;
   class SDOperand;
   class SelectionDAG;
+  class MachineBasicBlock;
+  class MachineInstr;
 
 //===----------------------------------------------------------------------===//
 /// TargetLowering - This class defines information used to lower LLVM code to