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b2e0054ca0
This is being recommitted to try and address the MSVC complaint. This patch implements a DDG printer pass that generates a graph in the DOT description language, providing a more visually appealing representation of the DDG. Similar to the CFG DOT printer, this functionality is provided under an option called -dot-ddg and can be generated in a less verbose mode under -dot-ddg-only option. Reviewed By: Meinersbur Differential Revision: https://reviews.llvm.org/D90159
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
//===-- ScheduleDAGPrinter.cpp - Implement ScheduleDAG::viewGraph() -------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This implements the ScheduleDAG::viewGraph method.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/ScheduleDAG.h"
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#include "llvm/CodeGen/TargetRegisterInfo.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/GraphWriter.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace llvm {
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template<>
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struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
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DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
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static std::string getGraphName(const ScheduleDAG *G) {
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return std::string(G->MF.getName());
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}
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static bool renderGraphFromBottomUp() {
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return true;
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}
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static bool isNodeHidden(const SUnit *Node, const ScheduleDAG *G) {
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return (Node->NumPreds > 10 || Node->NumSuccs > 10);
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}
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static std::string getNodeIdentifierLabel(const SUnit *Node,
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const ScheduleDAG *Graph) {
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std::string R;
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raw_string_ostream OS(R);
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OS << static_cast<const void *>(Node);
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return R;
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}
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/// If you want to override the dot attributes printed for a particular
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/// edge, override this method.
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static std::string getEdgeAttributes(const SUnit *Node,
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SUnitIterator EI,
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const ScheduleDAG *Graph) {
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if (EI.isArtificialDep())
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return "color=cyan,style=dashed";
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if (EI.isCtrlDep())
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return "color=blue,style=dashed";
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return "";
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}
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std::string getNodeLabel(const SUnit *SU, const ScheduleDAG *Graph);
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static std::string getNodeAttributes(const SUnit *N,
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const ScheduleDAG *Graph) {
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return "shape=Mrecord";
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}
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static void addCustomGraphFeatures(ScheduleDAG *G,
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GraphWriter<ScheduleDAG*> &GW) {
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return G->addCustomGraphFeatures(GW);
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}
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};
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}
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std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
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const ScheduleDAG *G) {
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return G->getGraphNodeLabel(SU);
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}
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/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
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/// rendered using 'dot'.
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///
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void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
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// This code is only for debugging!
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#ifndef NDEBUG
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ViewGraph(this, Name, false, Title);
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#else
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errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
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<< "systems with Graphviz or gv!\n";
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#endif // NDEBUG
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}
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/// Out-of-line implementation with no arguments is handy for gdb.
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void ScheduleDAG::viewGraph() {
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viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
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}
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