Replace use of PathV1.h in MCContext.cpp.

GetCurrentDirectory is now unused. Remove it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184003 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCContext.h

@@ -11,6 +11,7 @@
 #define LLVM_MC_MCCONTEXT_H
 
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/MC/MCDwarf.h"
@@ -97,7 +98,7 @@ namespace llvm {
     bool SecureLogUsed;
 
     /// The compilation directory to use for DW_AT_comp_dir.
-    std::string CompilationDir;
+    SmallString<128> CompilationDir;
 
     /// The main file name if passed in explicitly.
     std::string MainFileName;
@@ -272,7 +273,7 @@ namespace llvm {
     /// This can be overridden by clients which want to control the reported
     /// compilation directory and have it be something other than the current
     /// working directory.
-    const std::string &getCompilationDir() const { return CompilationDir; }
+    StringRef getCompilationDir() const { return CompilationDir; }
 
     /// \brief Set the compilation directory for DW_AT_comp_dir
     /// Override the default (CWD) compilation directory.

include/llvm/Support/PathV1.h

@@ -102,11 +102,6 @@ namespace sys {
       /// directory.
       static Path GetTemporaryDirectory(std::string* ErrMsg = 0);
 
-      /// Construct a path to the current directory for the current process.
-      /// @returns The current working directory.
-      /// @brief Returns the current working directory.
-      static Path GetCurrentDirectory();
-
       /// Return the suffix commonly used on file names that contain an
       /// executable.
       /// @returns The executable file suffix for the current platform.

lib/MC/MCContext.cpp

@@ -21,8 +21,8 @@
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/PathV1.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/SourceMgr.h"
 using namespace llvm;
@@ -38,11 +38,13 @@ MCContext::MCContext(const MCAsmInfo &mai, const MCRegisterInfo &mri,
   SrcMgr(mgr), MAI(mai), MRI(mri), MOFI(mofi),
   Allocator(), Symbols(Allocator), UsedNames(Allocator),
   NextUniqueID(0),
-  CompilationDir(llvm::sys::Path::GetCurrentDirectory().str()),
   CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0), 
   DwarfLocSeen(false), GenDwarfForAssembly(false), GenDwarfFileNumber(0),
   AllowTemporaryLabels(true), DwarfCompileUnitID(0), AutoReset(DoAutoReset) {
 
+  error_code EC = llvm::sys::fs::current_path(CompilationDir);
+  assert(!EC && "Could not determine the current directory");
+
   MachOUniquingMap = 0;
   ELFUniquingMap = 0;
   COFFUniquingMap = 0;

lib/Support/Unix/Path.inc

@@ -185,17 +185,6 @@ Path::GetTemporaryDirectory(std::string *ErrMsg) {
 #endif
 }
 
-Path
-Path::GetCurrentDirectory() {
-  char pathname[MAXPATHLEN];
-  if (!getcwd(pathname, MAXPATHLEN)) {
-    assert(false && "Could not query current working directory.");
-    return Path();
-  }
-
-  return Path(pathname);
-}
-
 #if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
     defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
     defined(__linux__) || defined(__CYGWIN__)

lib/Support/Windows/Path.inc

@@ -20,9 +20,6 @@
 #include <cstdio>
 #include <malloc.h>
 
-// We need to undo a macro defined in Windows.h, otherwise we won't compile:
-#undef GetCurrentDirectory
-
 // Windows happily accepts either forward or backward slashes, though any path
 // returned by a Win32 API will have backward slashes.  As LLVM code basically
 // assumes forward slashes are used, backward slashs are converted where they
@@ -199,13 +196,6 @@ Path::GetTemporaryDirectory(std::string* ErrMsg) {
   return *TempDirectory;
 }
 
-Path
-Path::GetCurrentDirectory() {
-  char pathname[MAX_PATH];
-  ::GetCurrentDirectoryA(MAX_PATH,pathname);
-  return Path(pathname);
-}
-
 /// GetMainExecutable - Return the path to the main executable, given the
 /// value of argv[0] from program startup.
 Path Path::GetMainExecutable(const char *argv0, void *MainAddr) {