[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

SelectionDAGPrinter.cpp added (r1.1)
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Log message:

Implement initial selectiondag printing support.  This gets us a nice
graph with no labels! :)


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Diffs of the changes:  (+48 -0)

Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
diff -c /dev/null llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp:1.1
*** /dev/null	Mon Jan 10 17:08:51 2005
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp	Mon Jan 10 17:08:40 2005
***************
*** 0 ****
--- 1,48 ----
+ //===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
+ // 
+ //                     The LLVM Compiler Infrastructure
+ //
+ // This file was developed by the LLVM research group and is distributed under
+ // the University of Illinois Open Source License. See LICENSE.TXT for details.
+ // 
+ //===----------------------------------------------------------------------===//
+ //
+ // This implements the SelectionDAG::viewGraph method.
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ #include "llvm/CodeGen/SelectionDAG.h"
+ #include "llvm/CodeGen/MachineFunction.h"
+ #include "llvm/Function.h"
+ #include "llvm/Support/GraphWriter.h"
+ #include <fstream>
+ using namespace llvm;
+ 
+ /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
+ /// rendered using 'dot'.
+ ///
+ void SelectionDAG::viewGraph() {
+   std::string Filename = "/tmp/dag." +
+     getMachineFunction().getFunction()->getName() + ".dot";
+   std::cerr << "Writing '" << Filename << "'... ";
+   std::ofstream F(Filename.c_str());
+ 
+   if (!F) {
+     std::cerr << "  error opening file for writing!\n";
+     return;
+   }
+ 
+   WriteGraph(F, this);
+   F.close();
+   std::cerr << "\n";
+ 
+   std::cerr << "Running 'dot' program... " << std::flush;
+   if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
+               + " > /tmp/dag.tempgraph.ps").c_str())) {
+     std::cerr << "Error running dot: 'dot' not in path?\n";
+   } else {
+     std::cerr << "\n";
+     system("gv /tmp/dag.tempgraph.ps");
+   }
+   system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str());
+ }