llvm-6502/include/llvm/Analysis/CFGPrinter.h
2009-10-18 04:09:11 +00:00

86 lines
2.6 KiB
C++

//===-- CFGPrinter.h - CFG printer external interface ------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines external functions that can be called to explicitly
// instantiate the CFG printer.
//
//===----------------------------------------------------------------------===//
#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 ();
FunctionPass *createCFGOnlyPrinterPass ();
} // End llvm namespace
#endif