Update to LLVM 3.5a.
Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617
diff --git a/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h b/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
new file mode 100644
index 0000000..a7a6205
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
@@ -0,0 +1,144 @@
+//===-- llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h ----*- C++ -*--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing line tables info into COFF files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_H__
+#define CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_H__
+
+#include "AsmPrinterHandler.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/LexicalScopes.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/DebugLoc.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+
+namespace llvm {
+/// \brief Collects and handles line tables information in a CodeView format.
+class WinCodeViewLineTables : public AsmPrinterHandler {
+ AsmPrinter *Asm;
+ DebugLoc PrevInstLoc;
+
+ // For each function, store a vector of labels to its instructions, as well as
+ // to the end of the function.
+ struct FunctionInfo {
+ SmallVector<MCSymbol *, 10> Instrs;
+ MCSymbol *End;
+ FunctionInfo() : End(0) {}
+ } *CurFn;
+
+ typedef DenseMap<const Function *, FunctionInfo> FnDebugInfoTy;
+ FnDebugInfoTy FnDebugInfo;
+ // Store the functions we've visited in a vector so we can maintain a stable
+ // order while emitting subsections.
+ SmallVector<const Function *, 10> VisitedFunctions;
+
+ // InstrInfoTy - Holds the Filename:LineNumber information for every
+ // instruction with a unique debug location.
+ struct InstrInfoTy {
+ StringRef Filename;
+ unsigned LineNumber;
+
+ InstrInfoTy() : LineNumber(0) {}
+
+ InstrInfoTy(StringRef Filename, unsigned LineNumber)
+ : Filename(Filename), LineNumber(LineNumber) {}
+ };
+ DenseMap<MCSymbol *, InstrInfoTy> InstrInfo;
+
+ // FileNameRegistry - Manages filenames observed while generating debug info
+ // by filtering out duplicates and bookkeeping the offsets in the string
+ // table to be generated.
+ struct FileNameRegistryTy {
+ SmallVector<StringRef, 10> Filenames;
+ struct PerFileInfo {
+ size_t FilenameID, StartOffset;
+ };
+ StringMap<PerFileInfo> Infos;
+
+ // The offset in the string table where we'll write the next unique
+ // filename.
+ size_t LastOffset;
+
+ FileNameRegistryTy() {
+ clear();
+ }
+
+ // Add Filename to the registry, if it was not observed before.
+ void add(StringRef Filename) {
+ if (Infos.count(Filename))
+ return;
+ size_t OldSize = Infos.size();
+ Infos[Filename].FilenameID = OldSize;
+ Infos[Filename].StartOffset = LastOffset;
+ LastOffset += Filename.size() + 1;
+ Filenames.push_back(Filename);
+ }
+
+ void clear() {
+ LastOffset = 1;
+ Infos.clear();
+ Filenames.clear();
+ }
+ } FileNameRegistry;
+
+ typedef std::map<std::pair<StringRef, StringRef>, char *>
+ DirAndFilenameToFilepathMapTy;
+ DirAndFilenameToFilepathMapTy DirAndFilenameToFilepathMap;
+ StringRef getFullFilepath(const MDNode *S);
+
+ void maybeRecordLocation(DebugLoc DL, const MachineFunction *MF);
+
+ void clear() {
+ assert(CurFn == 0);
+ FileNameRegistry.clear();
+ InstrInfo.clear();
+ }
+
+ void emitDebugInfoForFunction(const Function *GV);
+
+public:
+ WinCodeViewLineTables(AsmPrinter *Asm);
+
+ ~WinCodeViewLineTables() {
+ for (DirAndFilenameToFilepathMapTy::iterator
+ I = DirAndFilenameToFilepathMap.begin(),
+ E = DirAndFilenameToFilepathMap.end();
+ I != E; ++I)
+ free(I->second);
+ }
+
+ void setSymbolSize(const llvm::MCSymbol *, uint64_t) override {}
+
+ /// \brief Emit the COFF section that holds the line table information.
+ void endModule() override;
+
+ /// \brief Gather pre-function debug information.
+ void beginFunction(const MachineFunction *MF) override;
+
+ /// \brief Gather post-function debug information.
+ void endFunction(const MachineFunction *) override;
+
+ /// \brief Process beginning of an instruction.
+ void beginInstruction(const MachineInstr *MI) override;
+
+ /// \brief Process end of an instruction.
+ void endInstruction() override {}
+};
+} // End of namespace llvm
+
+#endif