[mlir] Make PassManager.h self-contained

Forward declaring llvm::errs is not enough, as it is used as a default
parameter with a type that references the base class. So the class
hierarchy must be visible.

diff --git a/mlir/include/mlir/Pass/PassManager.h b/mlir/include/mlir/Pass/PassManager.h
index 14f2da3..74fc772 100644 (file)
--- a/mlir/include/mlir/Pass/PassManager.h
+++ b/mlir/include/mlir/Pass/PassManager.h
@@ -13,14 +13,13 @@
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/iterator.h"
+#include "llvm/Support/raw_ostream.h"
 
 #include <functional>
 #include <vector>
 
 namespace llvm {
 class Any;
-class raw_fd_ostream;
-raw_fd_ostream &errs();
 } // end namespace llvm
 
 namespace mlir {