Update for llvm api change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239670 91177308-0d34-0410-b5e6-96231b3b80d8

tools/driver/driver.cpp

@@ -43,6 +43,7 @@
 #include "llvm/Support/Program.h"
 #include "llvm/Support/Regex.h"
 #include "llvm/Support/Signals.h"
+#include "llvm/Support/StringSaver.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/Timer.h"
@@ -290,18 +291,6 @@ static void ParseProgName(SmallVectorImpl<const char *> &ArgVector,
   }
 }
 
-namespace {
-  class StringSetSaver : public llvm::cl::StringSaver {
-  public:
-    StringSetSaver(std::set<std::string> &Storage) : Storage(Storage) {}
-    const char *SaveString(const char *Str) override {
-      return GetStableCStr(Storage, Str);
-    }
-  private:
-    std::set<std::string> &Storage;
-  };
-}
-
 static void SetBackdoorDriverOutputsFromEnvVars(Driver &TheDriver) {
   // Handle CC_PRINT_OPTIONS and CC_PRINT_OPTIONS_FILE.
   TheDriver.CCPrintOptions = !!::getenv("CC_PRINT_OPTIONS");
@@ -391,8 +380,8 @@ int main(int argc_, const char **argv_) {
     return 1;
   }
 
-  std::set<std::string> SavedStrings;
-  StringSetSaver Saver(SavedStrings);
+  llvm::BumpPtrAllocator A;
+  llvm::BumpPtrStringSaver Saver(A);
 
   // Determines whether we want nullptr markers in argv to indicate response
   // files end-of-lines. We only use this for the /LINK driver argument.
@@ -426,6 +415,7 @@ int main(int argc_, const char **argv_) {
     }
   }
 
+  std::set<std::string> SavedStrings;
   // Handle CCC_OVERRIDE_OPTIONS, used for editing a command line behind the
   // scenes.
   if (const char *OverrideStr = ::getenv("CCC_OVERRIDE_OPTIONS")) {