//
//===----------------------------------------------------------------------===//
//
-// This file defines a '-print-cfg' analysis pass, which emits the
+// This file defines a '-dot-cfg' analysis pass, which emits the
// cfg.<fnname>.dot file for each function in the program, with a graph of the
// CFG for that function.
//
#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;
-/// CFGOnly flag - This is used to control whether or not the CFG graph printer
-/// prints out the contents of basic blocks or not. This is acceptable because
-/// this code is only really used for debugging purposes.
-///
-static bool CFGOnly = false;
-
namespace llvm {
template<>
struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
static std::string getGraphName(const Function *F) {
- return "CFG for '" + F->getName() + "' function";
+ return "CFG for '" + F->getNameStr() + "' function";
}
static std::string getNodeLabel(const BasicBlock *Node,
- const Function *Graph) {
- if (CFGOnly && !Node->getName().empty())
- return Node->getName() + ":";
-
- std::ostringstream Out;
- if (CFGOnly) {
- WriteAsOperand(Out, Node, false);
- return Out.str();
+ 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(Out, Node, false);
- Out << ":";
+ WriteAsOperand(OS, Node, false);
+ OS << ":";
}
-
- Out << *Node;
- std::string OutStr = Out.str();
+
+ OS << *Node;
+ std::string OutStr = OS.str();
if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
// Process string output to make it nicer...
namespace {
struct VISIBILITY_HIDDEN CFGViewer : public FunctionPass {
static char ID; // Pass identifcation, replacement for typeid
- CFGViewer() : FunctionPass((intptr_t)&ID, true) {}
+ CFGViewer() : FunctionPass(&ID) {}
virtual bool runOnFunction(Function &F) {
F.viewCFG();
return false;
}
- void print(std::ostream &OS, const Module* = 0) const {}
+ void print(raw_ostream &OS, const Module* = 0) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
+}
- char CFGViewer::ID = 0;
- RegisterPass<CFGViewer> V0("view-cfg",
- "View CFG of function");
+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, true) {}
+ CFGOnlyViewer() : FunctionPass(&ID) {}
virtual bool runOnFunction(Function &F) {
- CFGOnly = true;
F.viewCFG();
- CFGOnly = false;
return false;
}
- void print(std::ostream &OS, const Module* = 0) const {}
+ void print(raw_ostream &OS, const Module* = 0) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
+}
- char CFGOnlyViewer::ID = 0;
- RegisterPass<CFGOnlyViewer> V1("view-cfg-only",
- "View CFG of function (with no function bodies)");
+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, true) {}
+ CFGPrinter() : FunctionPass(&ID) {}
+ explicit CFGPrinter(void *pid) : FunctionPass(pid) {}
virtual bool runOnFunction(Function &F) {
- std::string Filename = "cfg." + F.getName() + ".dot";
- cerr << "Writing '" << Filename << "'...";
- std::ofstream File(Filename.c_str());
+ std::string Filename = "cfg." + F.getNameStr() + ".dot";
+ errs() << "Writing '" << Filename << "'...";
+
+ std::string ErrorInfo;
+ raw_fd_ostream File(Filename.c_str(), ErrorInfo);
- if (File.good())
+ if (ErrorInfo.empty())
WriteGraph(File, (const Function*)&F);
else
- cerr << " error opening file for writing!";
- cerr << "\n";
+ errs() << " error opening file for writing!";
+ errs() << "\n";
return false;
}
- void print(std::ostream &OS, const Module* = 0) const {}
+ void print(raw_ostream &OS, const Module* = 0) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
+}
- char CFGPrinter::ID = 0;
- RegisterPass<CFGPrinter> P1("print-cfg",
- "Print CFG of function to 'dot' file");
+char CFGPrinter::ID = 0;
+static RegisterPass<CFGPrinter>
+P1("dot-cfg", "Print CFG of function to 'dot' file", false, true);
- struct VISIBILITY_HIDDEN CFGOnlyPrinter : public CFGPrinter {
+namespace {
+ struct VISIBILITY_HIDDEN CFGOnlyPrinter : public FunctionPass {
static char ID; // Pass identification, replacement for typeid
- CFGOnlyPrinter() : CFGPrinter((intptr_t)&ID) {}
+ CFGOnlyPrinter() : FunctionPass(&ID) {}
+ explicit CFGOnlyPrinter(void *pid) : FunctionPass(pid) {}
virtual bool runOnFunction(Function &F) {
- bool OldCFGOnly = CFGOnly;
- CFGOnly = true;
- CFGPrinter::runOnFunction(F);
- CFGOnly = OldCFGOnly;
+ std::string Filename = "cfg." + F.getNameStr() + ".dot";
+ errs() << "Writing '" << Filename << "'...";
+
+ std::string ErrorInfo;
+ raw_fd_ostream File(Filename.c_str(), ErrorInfo);
+
+ if (ErrorInfo.empty())
+ WriteGraph(File, (const Function*)&F, true);
+ else
+ errs() << " error opening file for writing!";
+ errs() << "\n";
return false;
}
- void print(std::ostream &OS, const Module* = 0) const {}
+ void print(raw_ostream &OS, const Module* = 0) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
-
- char CFGOnlyPrinter::ID = 0;
- RegisterPass<CFGOnlyPrinter>
- P2("print-cfg-only",
- "Print CFG of function to 'dot' file (with no function bodies)");
}
+char CFGOnlyPrinter::ID = 0;
+static RegisterPass<CFGOnlyPrinter>
+P2("dot-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 {
- ViewGraph(this, "cfg" + getName());
+ ViewGraph(this, "cfg" + getNameStr());
}
/// viewCFGOnly - This function is meant for use from the debugger. It works
/// his can make the graph smaller.
///
void Function::viewCFGOnly() const {
- CFGOnly = true;
- viewCFG();
- CFGOnly = false;
+ ViewGraph(this, "cfg" + getNameStr(), true);
}
FunctionPass *llvm::createCFGPrinterPass () {