Remove several .c_str() to be forward-compatible with StringRef.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90822 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 2b823e0..56ee63f 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -137,8 +137,8 @@
 
   // Create new compile unit.
   return Unit = DebugFactory.CreateCompileUnit(LangTag, 
-                                               AbsFileName.getLast().c_str(),
-                                               AbsFileName.getDirname().c_str(),
+                                               AbsFileName.getLast(),
+                                               AbsFileName.getDirname(),
                                                Producer.c_str(), isMain, 
                                                isOptimized, Flags, RuntimeVers);
 }
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 7f7affb..dbe7bd9 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -41,9 +41,9 @@
 // Used to set values for "production" clang, for releases.
 // #define USE_PRODUCTION_CLANG
 
-Driver::Driver(const char *_Name, const char *_Dir,
-               const char *_DefaultHostTriple,
-               const char *_DefaultImageName,
+Driver::Driver(llvm::StringRef _Name, llvm::StringRef _Dir,
+               llvm::StringRef _DefaultHostTriple,
+               llvm::StringRef _DefaultImageName,
                bool IsProduction, Diagnostic &_Diags)
   : Opts(createDriverOptTable()), Diags(_Diags),
     Name(_Name), Dir(_Dir), DefaultHostTriple(_DefaultHostTriple),
diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 8c2731b..8f66d4c 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -300,8 +300,8 @@
   Args.push_back("-fsyntax-only");
 
   llvm::sys::Path Path = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
-  driver::Driver TheDriver(Path.getBasename().c_str(),Path.getDirname().c_str(),
-                           llvm::sys::getHostTriple().c_str(),
+  driver::Driver TheDriver(Path.getBasename(), Path.getDirname(),
+                           llvm::sys::getHostTriple(),
                            "a.out", false, Diags);
   llvm::OwningPtr<driver::Compilation> C(
     TheDriver.BuildCompilation(Args.size(), Args.data()));