Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/tools/opt/GraphPrinters.cpp

@@ -0,0 +1,46 @@
+//===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines several printers for various different types of graphs used
+// by the LLVM infrastructure.  It uses the generic graph interface to convert
+// the graph into a .dot graph.  These graphs can then be processed with the
+// "dot" tool to convert them to postscript or some other suitable format.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/Dominators.h"
+#include "llvm/Pass.h"
+
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+//                            DomInfoPrinter Pass
+//===----------------------------------------------------------------------===//
+
+namespace {
+  class DomInfoPrinter : public FunctionPass {
+  public:
+    static char ID; // Pass identification, replacement for typeid
+    DomInfoPrinter() : FunctionPass(ID) {}
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.setPreservesAll();
+      AU.addRequired<DominatorTreeWrapperPass>();
+    }
+
+    bool runOnFunction(Function &F) override {
+      getAnalysis<DominatorTreeWrapperPass>().print(dbgs());
+      return false;
+    }
+  };
+}
+
+char DomInfoPrinter::ID = 0;
+static RegisterPass<DomInfoPrinter>
+DIP("print-dom-info", "Dominator Info Printer", true, true);