1 //===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines several printers for various different types of graphs used
11 // by the LLVM infrastructure.  It uses the generic graph interface to convert
12 // the graph into a .dot graph.  These graphs can then be processed with the
13 // "dot" tool to convert them to postscript or some other suitable format.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #include "llvm/IR/Dominators.h"
18 #include "llvm/Pass.h"
19 
20 using namespace llvm;
21 
22 //===----------------------------------------------------------------------===//
23 //                            DomInfoPrinter Pass
24 //===----------------------------------------------------------------------===//
25 
26 namespace {
27   class DomInfoPrinter : public FunctionPass {
28   public:
29     static char ID; // Pass identification, replacement for typeid
DomInfoPrinter()30     DomInfoPrinter() : FunctionPass(ID) {}
31 
getAnalysisUsage(AnalysisUsage & AU) const32     void getAnalysisUsage(AnalysisUsage &AU) const override {
33       AU.setPreservesAll();
34       AU.addRequired<DominatorTreeWrapperPass>();
35     }
36 
runOnFunction(Function & F)37     bool runOnFunction(Function &F) override {
38       getAnalysis<DominatorTreeWrapperPass>().dump();
39       return false;
40     }
41   };
42 }
43 
44 char DomInfoPrinter::ID = 0;
45 static RegisterPass<DomInfoPrinter>
46 DIP("print-dom-info", "Dominator Info Printer", true, true);
47