tools/opt/GraphPrinters.cpp

   1 //===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file defines several printers for various different types of graphs used
  10 // by the LLVM infrastructure.  It uses the generic graph interface to convert
  11 // the graph into a .dot graph.  These graphs can then be processed with the
  12 // "dot" tool to convert them to postscript or some other suitable format.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "llvm/IR/Dominators.h"
  17 #include "llvm/Pass.h"
  18
  19 using namespace llvm;
  20
  21 //===----------------------------------------------------------------------===//
  22 //                            DomInfoPrinter Pass
  23 //===----------------------------------------------------------------------===//
  24
  25 namespace {
  26   class DomInfoPrinter : public FunctionPass {
  27   public:
  28     static char ID; // Pass identification, replacement for typeid
  29     DomInfoPrinter() : FunctionPass(ID) {}
  30
  31     void getAnalysisUsage(AnalysisUsage &AU) const override {
  32       AU.setPreservesAll();
  33       AU.addRequired<DominatorTreeWrapperPass>();
  34     }
  35
  36     bool runOnFunction(Function &F) override {
  37       getAnalysis<DominatorTreeWrapperPass>().print(dbgs());
  38       return false;
  39     }
  40   };
  41 }
  42
  43 char DomInfoPrinter::ID = 0;
  44 static RegisterPass<DomInfoPrinter>
  45 DIP("print-dom-info", "Dominator Info Printer", true, true);