1 files changed, 224 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Analysis/DbgInfoPrinter.cpp b/contrib/llvm/lib/Analysis/DbgInfoPrinter.cpp
new file mode 100644
index 0000000..cd832ab
--- /dev/null
+++ b/contrib/llvm/lib/Analysis/DbgInfoPrinter.cpp
@@ -0,0 +1,224 @@
+//===- DbgInfoPrinter.cpp - Print debug info in a human readable form ------==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements a pass that prints instructions, and associated debug
+// info:
+// 
+//   - source/line/col information
+//   - original variable name
+//   - original type name
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Pass.h"
+#include "llvm/Function.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/Metadata.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Support/CFG.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+static cl::opt<bool>
+PrintDirectory("print-fullpath",
+               cl::desc("Print fullpath when printing debug info"),
+               cl::Hidden);
+
+namespace {
+  class PrintDbgInfo : public FunctionPass {
+    raw_ostream &Out;
+    void printVariableDeclaration(const Value *V);
+  public:
+    static char ID; // Pass identification
+    PrintDbgInfo() : FunctionPass(ID), Out(errs()) {
+      initializePrintDbgInfoPass(*PassRegistry::getPassRegistry());
+    }
+
+    virtual bool runOnFunction(Function &F);
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.setPreservesAll();
+    }
+  };
+  char PrintDbgInfo::ID = 0;
+}
+
+INITIALIZE_PASS(PrintDbgInfo, "print-dbginfo",
+                "Print debug info in human readable form", false, false)
+
+FunctionPass *llvm::createDbgInfoPrinterPass() { return new PrintDbgInfo(); }
+
+/// Find the debug info descriptor corresponding to this global variable.
+static Value *findDbgGlobalDeclare(GlobalVariable *V) {
+  const Module *M = V->getParent();
+  NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
+  if (!NMD)
+    return 0;
+
+  for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+    DIDescriptor DIG(cast<MDNode>(NMD->getOperand(i)));
+    if (!DIG.isGlobalVariable())
+      continue;
+    if (DIGlobalVariable(DIG).getGlobal() == V)
+      return DIG;
+  }
+  return 0;
+}
+
+/// Find the debug info descriptor corresponding to this function.
+static Value *findDbgSubprogramDeclare(Function *V) {
+  const Module *M = V->getParent();
+  NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.sp");
+  if (!NMD)
+    return 0;
+
+  for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+    DIDescriptor DIG(cast<MDNode>(NMD->getOperand(i)));
+    if (!DIG.isSubprogram())
+      continue;
+    if (DISubprogram(DIG).getFunction() == V)
+      return DIG;
+  }
+  return 0;
+}
+
+/// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
+/// It looks through pointer casts too.
+static const DbgDeclareInst *findDbgDeclare(const Value *V) {
+  V = V->stripPointerCasts();
+
+  if (!isa<Instruction>(V) && !isa<Argument>(V))
+    return 0;
+
+  const Function *F = NULL;
+  if (const Instruction *I = dyn_cast<Instruction>(V))
+    F = I->getParent()->getParent();
+  else if (const Argument *A = dyn_cast<Argument>(V))
+    F = A->getParent();
+
+  for (Function::const_iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
+    for (BasicBlock::const_iterator BI = (*FI).begin(), BE = (*FI).end();
+         BI != BE; ++BI)
+      if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
+        if (DDI->getAddress() == V)
+          return DDI;
+
+  return 0;
+}
+
+static bool getLocationInfo(const Value *V, std::string &DisplayName,
+                            std::string &Type, unsigned &LineNo,
+                            std::string &File, std::string &Dir) {
+  DICompileUnit Unit;
+  DIType TypeD;
+
+  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
+    Value *DIGV = findDbgGlobalDeclare(GV);
+    if (!DIGV) return false;
+    DIGlobalVariable Var(cast<MDNode>(DIGV));
+
+    StringRef D = Var.getDisplayName();
+    if (!D.empty())
+      DisplayName = D;
+    LineNo = Var.getLineNumber();
+    Unit = Var.getCompileUnit();
+    TypeD = Var.getType();
+  } else if (Function *F = dyn_cast<Function>(const_cast<Value*>(V))){
+    Value *DIF = findDbgSubprogramDeclare(F);
+    if (!DIF) return false;
+    DISubprogram Var(cast<MDNode>(DIF));
+
+    StringRef D = Var.getDisplayName();
+    if (!D.empty())
+      DisplayName = D;
+    LineNo = Var.getLineNumber();
+    Unit = Var.getCompileUnit();
+    TypeD = Var.getType();
+  } else {
+    const DbgDeclareInst *DDI = findDbgDeclare(V);
+    if (!DDI) return false;
+    DIVariable Var(cast<MDNode>(DDI->getVariable()));
+
+    StringRef D = Var.getName();
+    if (!D.empty())
+      DisplayName = D;
+    LineNo = Var.getLineNumber();
+    Unit = Var.getCompileUnit();
+    TypeD = Var.getType();
+  }
+
+  StringRef T = TypeD.getName();
+  if (!T.empty())
+    Type = T;
+  StringRef F = Unit.getFilename();
+  if (!F.empty())
+    File = F;
+  StringRef D = Unit.getDirectory();
+  if (!D.empty())
+    Dir = D;
+  return true;
+}
+
+void PrintDbgInfo::printVariableDeclaration(const Value *V) {
+  std::string DisplayName, File, Directory, Type;
+  unsigned LineNo = 0;
+
+  if (!getLocationInfo(V, DisplayName, Type, LineNo, File, Directory))
+    return;
+
+  Out << "; ";
+  WriteAsOperand(Out, V, false, 0);
+  if (isa<Function>(V)) 
+    Out << " is function " << DisplayName
+        << " of type " << Type << " declared at ";
+  else
+    Out << " is variable " << DisplayName
+        << " of type " << Type << " declared at ";
+
+  if (PrintDirectory)
+    Out << Directory << "/";
+
+  Out << File << ":" << LineNo << "\n";
+}
+
+bool PrintDbgInfo::runOnFunction(Function &F) {
+  if (F.isDeclaration())
+    return false;
+
+  Out << "function " << F.getName() << "\n\n";
+
+  for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
+    BasicBlock *BB = I;
+
+    if (I != F.begin() && (pred_begin(BB) == pred_end(BB)))
+      // Skip dead blocks.
+      continue;
+
+    Out << BB->getName();
+    Out << ":";
+
+    Out << "\n";
+
+    for (BasicBlock::const_iterator i = BB->begin(), e = BB->end();
+         i != e; ++i) {
+
+        printVariableDeclaration(i);
+
+        if (const User *U = dyn_cast<User>(i)) {
+          for(unsigned i=0;i<U->getNumOperands();i++)
+            printVariableDeclaration(U->getOperand(i));
+        }
+    }
+  }
+  return false;
+}