Extending MachineDebugInfo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25086 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineDebugInfo.cpp

@@ -0,0 +1,90 @@
+//===-- llvm/CodeGen/MachineDebugInfo.cpp -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by James M. Laskey and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Collect debug information for a module.  This information should be in a
+// neutral form that can be used by different debugging schemes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineDebugInfo.h"
+
+using namespace llvm;
+
+// Handle the Pass registration stuff necessary to use TargetData's.
+namespace {
+  RegisterPass<MachineDebugInfo> X("machinedebuginfo", "Debug Information",
+                                  PassInfo::Analysis | PassInfo::Optimization);
+}
+
+namespace llvm {
+  
+  /// DebugInfo - Keep track of debug information for the function.
+  ///
+  // FIXME - making it global until we can find a proper place to hang it from.
+  MachineDebugInfo *DebugInfo;
+
+  // FIXME - temporary hack until we can find a place to hand debug info from.
+  ModulePass *createDebugInfoPass() {
+    if (!DebugInfo) DebugInfo = new MachineDebugInfo();
+    return (ModulePass *)DebugInfo;
+  }
+  
+  /// getDebugInfo - Returns the DebugInfo.
+  MachineDebugInfo &getMachineDebugInfo() {
+    assert(DebugInfo && "DebugInfo pass not created");
+    return *DebugInfo;
+  }
+
+  /// doInitialization - Initialize the debug state for a new module.
+  ///
+  bool MachineDebugInfo::doInitialization() {
+    return true;
+  }
+
+  /// doFinalization - Tear down the debug state after completion of a module.
+  ///
+  bool MachineDebugInfo::doFinalization() {
+    return true;
+  }
+
+  /// RecordSource - Register a source file with debug info.  Returns an id.
+  ///
+  unsigned MachineDebugInfo::RecordSource(std::string fname,
+                                          std::string dirname) {
+    // Compose a key
+    std::string path = dirname + "/" + fname;
+    // Check if the source file is already recorded
+    StrIntMapIter SMI = SourceMap.find(path);
+    // If already there return existing id
+    if (SMI != SourceMap.end()) return SMI->second;
+    // Bump up the count
+    ++SourceCount;
+    // Record the count
+    SourceMap[path] = SourceCount;
+    // Return id
+    return SourceCount;
+  }
+
+  /// getSourceFiles - Return a vector of files.  Vector index + 1 equals id.
+  ///
+  std::vector<std::string> MachineDebugInfo::getSourceFiles() {
+    std::vector<std::string> Sources(SourceCount);
+    
+    for (StrIntMapIter SMI = SourceMap.begin(), E = SourceMap.end(); SMI != E;
+                       SMI++) {
+      unsigned Index = SMI->second - 1;
+      std::string Path = SMI->first;
+      Sources[Index] = Path;
+    }
+    return Sources;
+  }
+
+
+};
+