1 //===- ViewRegionGraph.cpp - View/write graphviz graphs -------------------===//
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 #include "mlir/Transforms/ViewRegionGraph.h"
10 #include "PassDetail.h"
11 #include "mlir/IR/RegionGraphTraits.h"
12
13 using namespace mlir;
14
15 namespace llvm {
16
17 // Specialize DOTGraphTraits to produce more readable output.
18 template <> struct DOTGraphTraits<Region *> : public DefaultDOTGraphTraits {
19 using DefaultDOTGraphTraits::DefaultDOTGraphTraits;
20
21 static std::string getNodeLabel(Block *Block, Region *);
22 };
23
getNodeLabel(Block * Block,Region *)24 std::string DOTGraphTraits<Region *>::getNodeLabel(Block *Block, Region *) {
25 // Reuse the print output for the node labels.
26 std::string outStreamStr;
27 raw_string_ostream os(outStreamStr);
28 Block->print(os);
29 std::string &outStr = os.str();
30
31 if (outStr[0] == '\n')
32 outStr.erase(outStr.begin());
33
34 // Process string output to left justify the block.
35 for (unsigned i = 0; i != outStr.length(); ++i) {
36 if (outStr[i] == '\n') {
37 outStr[i] = '\\';
38 outStr.insert(outStr.begin() + i + 1, 'l');
39 }
40 }
41
42 return outStr;
43 }
44
45 } // end namespace llvm
46
viewGraph(Region & region,const Twine & name,bool shortNames,const Twine & title,llvm::GraphProgram::Name program)47 void mlir::viewGraph(Region ®ion, const Twine &name, bool shortNames,
48 const Twine &title, llvm::GraphProgram::Name program) {
49 llvm::ViewGraph(®ion, name, shortNames, title, program);
50 }
51
writeGraph(raw_ostream & os,Region & region,bool shortNames,const Twine & title)52 raw_ostream &mlir::writeGraph(raw_ostream &os, Region ®ion, bool shortNames,
53 const Twine &title) {
54 return llvm::WriteGraph(os, ®ion, shortNames, title);
55 }
56
viewGraph(const Twine & regionName)57 void mlir::Region::viewGraph(const Twine ®ionName) {
58 ::mlir::viewGraph(*this, regionName);
59 }
viewGraph()60 void mlir::Region::viewGraph() { viewGraph("region"); }
61
62 namespace {
63 struct PrintCFGPass : public PrintCFGBase<PrintCFGPass> {
PrintCFGPass__anond8fd83d10111::PrintCFGPass64 PrintCFGPass(raw_ostream &os = llvm::errs(), bool shortNames = false,
65 const Twine &title = "")
66 : os(os), shortNames(shortNames), title(title.str()) {}
runOnFunction__anond8fd83d10111::PrintCFGPass67 void runOnFunction() override {
68 mlir::writeGraph(os, getFunction().getBody(), shortNames, title);
69 }
70
71 private:
72 raw_ostream &os;
73 bool shortNames;
74 std::string title;
75 };
76 } // namespace
77
78 std::unique_ptr<mlir::OperationPass<mlir::FuncOp>>
createPrintCFGGraphPass(raw_ostream & os,bool shortNames,const Twine & title)79 mlir::createPrintCFGGraphPass(raw_ostream &os, bool shortNames,
80 const Twine &title) {
81 return std::make_unique<PrintCFGPass>(os, shortNames, title);
82 }
83