Revert r100143.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100146 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 3a7de300c1..f6cc71f3a4 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -39,6 +39,40 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
+namespace {
+  struct Printer : public MachineFunctionPass {
+    static char ID;
+
+    raw_ostream &OS;
+    const std::string Banner;
+
+    Printer(raw_ostream &os, const std::string &banner) 
+      : MachineFunctionPass(&ID), OS(os), Banner(banner) {}
+
+    const char *getPassName() const { return "MachineFunction Printer"; }
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+      MachineFunctionPass::getAnalysisUsage(AU);
+    }
+
+    bool runOnMachineFunction(MachineFunction &MF) {
+      OS << "# " << Banner << ":\n";
+      MF.print(OS);
+      return false;
+    }
+  };
+  char Printer::ID = 0;
+}
+
+/// Returns a newly-created MachineFunction Printer pass. The default banner is
+/// empty.
+///
+FunctionPass *llvm::createMachineFunctionPrinterPass(raw_ostream &OS,
+                                                     const std::string &Banner){
+  return new Printer(OS, Banner);
+}
+
 //===----------------------------------------------------------------------===//
 // MachineFunction implementation
 //===----------------------------------------------------------------------===//