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247 lines
8.4 KiB
C++
247 lines
8.4 KiB
C++
//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This implements the SelectionDAG::viewGraph method.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CodeGen/SelectionDAG.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/Target/MRegisterInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/GraphWriter.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Config/config.h"
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#include <fstream>
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#include <sstream>
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#include <iostream>
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using namespace llvm;
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namespace llvm {
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template<>
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struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {
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static std::string getGraphName(const SelectionDAG *G) {
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return G->getMachineFunction().getFunction()->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 hasNodeAddressLabel(const SDNode *Node,
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const SelectionDAG *Graph) {
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return true;
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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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template<typename EdgeIter>
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static std::string getEdgeAttributes(const void *Node, EdgeIter EI) {
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SDOperand Op = EI.getNode()->getOperand(EI.getOperand());
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MVT::ValueType VT = Op.getValueType();
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if (VT == MVT::Flag)
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return "color=red,style=bold";
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else if (VT == MVT::Other)
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return "style=dashed";
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return "";
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}
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static std::string getNodeLabel(const SDNode *Node,
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const SelectionDAG *Graph);
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static std::string getNodeAttributes(const SDNode *N,
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const SelectionDAG *Graph) {
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#ifndef NDEBUG
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const std::string &Attrs = Graph->getGraphAttrs(N);
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if (!Attrs.empty()) {
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if (Attrs.find("shape=") == std::string::npos)
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return std::string("shape=Mrecord,") + Attrs;
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else
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return Attrs;
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}
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#endif
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return "shape=Mrecord";
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}
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static void addCustomGraphFeatures(SelectionDAG *G,
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GraphWriter<SelectionDAG*> &GW) {
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GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
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if (G->getRoot().Val)
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GW.emitEdge(0, -1, G->getRoot().Val, -1, "");
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}
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};
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}
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std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
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const SelectionDAG *G) {
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std::string Op = Node->getOperationName(G);
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for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
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if (Node->getValueType(i) == MVT::Other)
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Op += ":ch";
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else
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Op = Op + ":" + MVT::getValueTypeString(Node->getValueType(i));
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if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(Node)) {
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Op += ": " + utostr(CSDN->getValue());
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} else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(Node)) {
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Op += ": " + ftostr(CSDN->getValue());
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} else if (const GlobalAddressSDNode *GADN =
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dyn_cast<GlobalAddressSDNode>(Node)) {
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int offset = GADN->getOffset();
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Op += ": " + GADN->getGlobal()->getName();
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if (offset > 0)
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Op += "+" + itostr(offset);
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else
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Op += itostr(offset);
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} else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) {
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Op += " " + itostr(FIDN->getIndex());
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} else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(Node)) {
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Op += " " + itostr(JTDN->getIndex());
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} else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){
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if (CP->isMachineConstantPoolEntry()) {
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std::ostringstream SS;
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CP->getMachineCPVal()->print(SS);
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Op += "<" + SS.str() + ">";
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} else {
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if (ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
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Op += "<" + ftostr(CFP->getValue()) + ">";
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else if (ConstantInt *CI = dyn_cast<ConstantInt>(CP->getConstVal()))
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Op += "<" + utostr(CI->getZExtValue()) + ">";
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else {
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std::ostringstream SS;
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WriteAsOperand(SS, CP->getConstVal(), false);
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Op += "<" + SS.str() + ">";
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}
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}
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} else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(Node)) {
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Op = "BB: ";
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const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
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if (LBB)
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Op += LBB->getName();
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//Op += " " + (const void*)BBDN->getBasicBlock();
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} else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(Node)) {
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if (G && R->getReg() != 0 &&
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MRegisterInfo::isPhysicalRegister(R->getReg())) {
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Op = Op + " " + G->getTarget().getRegisterInfo()->getName(R->getReg());
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} else {
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Op += " #" + utostr(R->getReg());
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}
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} else if (const ExternalSymbolSDNode *ES =
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dyn_cast<ExternalSymbolSDNode>(Node)) {
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Op += "'" + std::string(ES->getSymbol()) + "'";
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} else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) {
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if (M->getValue())
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Op += "<" + M->getValue()->getName() + ":" + itostr(M->getOffset()) + ">";
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else
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Op += "<null:" + itostr(M->getOffset()) + ">";
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} else if (const VTSDNode *N = dyn_cast<VTSDNode>(Node)) {
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Op = Op + " VT=" + getValueTypeString(N->getVT());
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} else if (const StringSDNode *N = dyn_cast<StringSDNode>(Node)) {
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Op = Op + "\"" + N->getValue() + "\"";
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} else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(Node)) {
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bool doExt = true;
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switch (LD->getExtensionType()) {
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default: doExt = false; break;
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case ISD::EXTLOAD:
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Op = Op + "<anyext ";
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break;
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case ISD::SEXTLOAD:
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Op = Op + " <sext ";
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break;
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case ISD::ZEXTLOAD:
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Op = Op + " <zext ";
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break;
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}
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if (doExt)
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Op = Op + MVT::getValueTypeString(LD->getLoadedVT()) + ">";
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Op += LD->getIndexedModeName(LD->getAddressingMode());
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} else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(Node)) {
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if (ST->isTruncatingStore())
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Op = Op + "<trunc " + MVT::getValueTypeString(ST->getStoredVT()) + ">";
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Op += ST->getIndexedModeName(ST->getAddressingMode());
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}
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return Op;
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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 SelectionDAG::viewGraph() {
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// This code is only for debugging!
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#ifndef NDEBUG
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ViewGraph(this, "dag." + getMachineFunction().getFunction()->getName());
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#else
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std::cerr << "SelectionDAG::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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/// clearGraphAttrs - Clear all previously defined node graph attributes.
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/// Intended to be used from a debugging tool (eg. gdb).
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void SelectionDAG::clearGraphAttrs() {
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#ifndef NDEBUG
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NodeGraphAttrs.clear();
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#else
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std::cerr << "SelectionDAG::clearGraphAttrs is only available in debug builds"
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<< " on systems with Graphviz or gv!\n";
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#endif
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}
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/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".)
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///
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void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) {
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#ifndef NDEBUG
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NodeGraphAttrs[N] = Attrs;
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#else
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std::cerr << "SelectionDAG::setGraphAttrs is only available in debug builds"
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<< " on systems with Graphviz or gv!\n";
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#endif
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}
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/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".)
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/// Used from getNodeAttributes.
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const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const {
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#ifndef NDEBUG
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std::map<const SDNode *, std::string>::const_iterator I =
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NodeGraphAttrs.find(N);
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if (I != NodeGraphAttrs.end())
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return I->second;
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else
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return "";
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#else
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std::cerr << "SelectionDAG::getGraphAttrs is only available in debug builds"
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<< " on systems with Graphviz or gv!\n";
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return std::string("");
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#endif
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}
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/// setGraphColor - Convenience for setting node color attribute.
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///
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void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) {
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#ifndef NDEBUG
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NodeGraphAttrs[N] = std::string("color=") + Color;
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#else
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std::cerr << "SelectionDAG::setGraphColor is only available in debug builds"
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<< " on systems with Graphviz or gv!\n";
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#endif
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}
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