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49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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//===-- 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/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/Function.h"
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#include "llvm/Support/GraphWriter.h"
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#include <fstream>
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using namespace llvm;
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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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std::string Filename = "/tmp/dag." +
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getMachineFunction().getFunction()->getName() + ".dot";
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std::cerr << "Writing '" << Filename << "'... ";
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std::ofstream F(Filename.c_str());
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if (!F) {
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std::cerr << " error opening file for writing!\n";
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return;
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}
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WriteGraph(F, this);
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F.close();
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std::cerr << "\n";
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std::cerr << "Running 'dot' program... " << std::flush;
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if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
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+ " > /tmp/dag.tempgraph.ps").c_str())) {
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std::cerr << "Error running dot: 'dot' not in path?\n";
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} else {
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std::cerr << "\n";
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system("gv /tmp/dag.tempgraph.ps");
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}
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system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str());
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}
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