Use Function::getEntryBlock instead of Function::begin, for clarity.

[oota-llvm.git] / lib / Analysis / CFGPrinter.cpp

diff --git a/lib/Analysis/CFGPrinter.cpp b/lib/Analysis/CFGPrinter.cpp
index 53b40ec5026b49e56cd6755604da20d751cafc72..e20a0a2f876ffb43a46387f061b060591f8af5ab 100644 (file)
--- a/lib/Analysis/CFGPrinter.cpp
+++ b/lib/Analysis/CFGPrinter.cpp
@@ -2,8 +2,8 @@
 //
 //                     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 file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -23,7 +23,10 @@
 #include "llvm/Analysis/CFGPrinter.h"
 #include "llvm/Assembly/Writer.h"
 #include "llvm/Support/CFG.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/GraphWriter.h"
+#include "llvm/Config/config.h"
+#include <iosfwd>
 #include <sstream>
 #include <fstream>
 using namespace llvm;
@@ -48,12 +51,12 @@ struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
 
     std::ostringstream Out;
     if (CFGOnly) {
-      WriteAsOperand(Out, Node, false, true);
+      WriteAsOperand(Out, Node, false);
       return Out.str();
     }
 
     if (Node->getName().empty()) {
-      WriteAsOperand(Out, Node, false, true);
+      WriteAsOperand(Out, Node, false);
       Out << ":";
     }
 
@@ -87,17 +90,68 @@ struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
 }
 
 namespace {
-  struct CFGPrinter : public FunctionPass {
+  struct VISIBILITY_HIDDEN CFGViewer : public FunctionPass {
+    static char ID; // Pass identifcation, replacement for typeid
+    CFGViewer() : FunctionPass((intptr_t)&ID) {}
+
+    virtual bool runOnFunction(Function &F) {
+      F.viewCFG();
+      return false;
+    }
+
+    void print(std::ostream &OS, const Module* = 0) const {}
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+  };
+}
+
+char CFGViewer::ID = 0;
+static RegisterPass<CFGViewer>
+V0("view-cfg", "View CFG of function", false, true);
+
+namespace {
+  struct VISIBILITY_HIDDEN CFGOnlyViewer : public FunctionPass {
+    static char ID; // Pass identifcation, replacement for typeid
+    CFGOnlyViewer() : FunctionPass((intptr_t)&ID) {}
+
+    virtual bool runOnFunction(Function &F) {
+      CFGOnly = true;
+      F.viewCFG();
+      CFGOnly = false;
+      return false;
+    }
+
+    void print(std::ostream &OS, const Module* = 0) const {}
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+  };
+}
+
+char CFGOnlyViewer::ID = 0;
+static RegisterPass<CFGOnlyViewer>
+V1("view-cfg-only",
+   "View CFG of function (with no function bodies)", false, true);
+
+namespace {
+  struct VISIBILITY_HIDDEN CFGPrinter : public FunctionPass {
+    static char ID; // Pass identification, replacement for typeid
+    CFGPrinter() : FunctionPass((intptr_t)&ID) {}
+    explicit CFGPrinter(intptr_t pid) : FunctionPass(pid) {}
+
     virtual bool runOnFunction(Function &F) {
       std::string Filename = "cfg." + F.getName() + ".dot";
-      std::cerr << "Writing '" << Filename << "'...";
+      cerr << "Writing '" << Filename << "'...";
       std::ofstream File(Filename.c_str());
 
       if (File.good())
         WriteGraph(File, (const Function*)&F);
       else
-        std::cerr << "  error opening file for writing!";
-      std::cerr << "\n";
+        cerr << "  error opening file for writing!";
+      cerr << "\n";
       return false;
     }
 
@@ -107,11 +161,16 @@ namespace {
       AU.setPreservesAll();
     }
   };
+}
 
-  RegisterAnalysis<CFGPrinter> P1("print-cfg",
-                                  "Print CFG of function to 'dot' file");
+char CFGPrinter::ID = 0;
+static RegisterPass<CFGPrinter>
+P1("print-cfg", "Print CFG of function to 'dot' file", false, true);
 
-  struct CFGOnlyPrinter : public CFGPrinter {
+namespace {
+  struct VISIBILITY_HIDDEN CFGOnlyPrinter : public CFGPrinter {
+    static char ID; // Pass identification, replacement for typeid
+    CFGOnlyPrinter() : CFGPrinter((intptr_t)&ID) {}
     virtual bool runOnFunction(Function &F) {
       bool OldCFGOnly = CFGOnly;
       CFGOnly = true;
@@ -125,40 +184,20 @@ namespace {
       AU.setPreservesAll();
     }
   };
-
-  RegisterAnalysis<CFGOnlyPrinter>
-  P2("print-cfg-only",
-     "Print CFG of function to 'dot' file (with no function bodies)");
 }
 
+char CFGOnlyPrinter::ID = 0;
+static RegisterPass<CFGOnlyPrinter>
+P2("print-cfg-only",
+   "Print CFG of function to 'dot' file (with no function bodies)", false, true);
+
 /// viewCFG - This function is meant for use from the debugger.  You can just
 /// say 'call F->viewCFG()' and a ghostview window should pop up from the
 /// program, displaying the CFG of the current function.  This depends on there
 /// being a 'dot' and 'gv' program in your path.
 ///
 void Function::viewCFG() const {
-  std::string Filename = "/tmp/cfg." + getName() + ".dot";
-  std::cerr << "Writing '" << Filename << "'... ";
-  std::ofstream F(Filename.c_str());
-
-  if (!F.good()) {
-    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/cfg.tempgraph.ps").c_str())) {
-    std::cerr << "Error running dot: 'dot' not in path?\n";
-  } else {
-    std::cerr << "\n";
-    system("gv /tmp/cfg.tempgraph.ps");
-  }
-  system(("rm " + Filename + " /tmp/cfg.tempgraph.ps").c_str());
+  ViewGraph(this, "cfg" + getName());
 }
 
 /// viewCFGOnly - This function is meant for use from the debugger.  It works