make DOTGraphTraits public, patch by Tobias Grosser!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84396 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 61 insertions, 0 deletions

diff --git a/include/llvm/Analysis/CFGPrinter.h b/include/llvm/Analysis/CFGPrinter.h
index 6a479d199c..435f8ea484 100644
--- a/include/llvm/Analysis/CFGPrinter.h
+++ b/include/llvm/Analysis/CFGPrinter.h
@@ -15,6 +15,67 @@
 #ifndef LLVM_ANALYSIS_CFGPRINTER_H
 #define LLVM_ANALYSIS_CFGPRINTER_H
 
+#include "llvm/Function.h"
+#include "llvm/Instructions.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Support/CFG.h"
+#include "llvm/Support/GraphWriter.h"
+
+namespace llvm {
+template<>
+struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
+  static std::string getGraphName(const Function *F) {
+    return "CFG for '" + F->getNameStr() + "' function";
+  }
+
+  static std::string getNodeLabel(const BasicBlock *Node,
+                                  const Function *Graph,
+                                  bool ShortNames) {
+    if (ShortNames && !Node->getName().empty())
+      return Node->getNameStr() + ":";
+
+    std::string Str;
+    raw_string_ostream OS(Str);
+
+    if (ShortNames) {
+      WriteAsOperand(OS, Node, false);
+      return OS.str();
+    }
+
+    if (Node->getName().empty()) {
+      WriteAsOperand(OS, Node, false);
+      OS << ":";
+    }
+
+    OS << *Node;
+    std::string OutStr = OS.str();
+    if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
+
+    // Process string output to make it nicer...
+    for (unsigned i = 0; i != OutStr.length(); ++i)
+      if (OutStr[i] == '\n') {                            // Left justify
+        OutStr[i] = '\\';
+        OutStr.insert(OutStr.begin()+i+1, 'l');
+      } else if (OutStr[i] == ';') {                      // Delete comments!
+        unsigned Idx = OutStr.find('\n', i+1);            // Find end of line
+        OutStr.erase(OutStr.begin()+i, OutStr.begin()+Idx);
+        --i;
+      }
+
+    return OutStr;
+  }
+
+  static std::string getEdgeSourceLabel(const BasicBlock *Node,
+                                        succ_const_iterator I) {
+    // Label source of conditional branches with "T" or "F"
+    if (const BranchInst *BI = dyn_cast<BranchInst>(Node->getTerminator()))
+      if (BI->isConditional())
+        return (I == succ_begin(Node)) ? "T" : "F";
+    return "";
+  }
+};
+} // End llvm namespace
+
 namespace llvm {
   class FunctionPass;
   FunctionPass *createCFGPrinterPass ();