clang -cc1: Kill off -empty-input only, and replace with -init-only which is an

actual action.
 - This is easier to use, and more reliable for timing the thing this was
   actually meant to be useful for.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98978 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 16 insertions, 9 deletions

diff --git a/lib/Frontend/CompilerInstance.cpp b/lib/Frontend/CompilerInstance.cpp
index bb0d308e7b..7b4932d787 100644
--- a/lib/Frontend/CompilerInstance.cpp
+++ b/lib/Frontend/CompilerInstance.cpp
@@ -429,12 +429,7 @@ bool CompilerInstance::InitializeSourceManager(llvm::StringRef InputFile,
                                                SourceManager &SourceMgr,
                                                const FrontendOptions &Opts) {
   // Figure out where to get and map in the main file.
-  if (Opts.EmptyInputOnly) {
-    const char *EmptyStr = "";
-    llvm::MemoryBuffer *SB =
-      llvm::MemoryBuffer::getMemBuffer(EmptyStr, EmptyStr, "<empty input>");
-    SourceMgr.createMainFileIDForMemBuffer(SB);
-  } else if (InputFile != "-") {
+  if (InputFile != "-") {
     const FileEntry *File = FileMgr.getFile(InputFile);
     if (File) SourceMgr.createMainFileID(File, SourceLocation());
     if (SourceMgr.getMainFileID().isInvalid()) {
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index d47fcf6f9b..2dfc592ec8 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -288,6 +288,7 @@ static const char *getActionName(frontend::ActionKind Kind) {
   case frontend::FixIt:                  return "-fixit";
   case frontend::GeneratePCH:            return "-emit-pch";
   case frontend::GeneratePTH:            return "-emit-pth";
+  case frontend::InitOnly:               return "-init-only";
   case frontend::ParseNoop:              return "-parse-noop";
   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
@@ -310,8 +311,6 @@ static void FrontendOptsToArgs(const FrontendOptions &Opts,
     Res.push_back("-no-code-completion-debug-printer");
   if (Opts.DisableFree)
     Res.push_back("-disable-free");
-  if (Opts.EmptyInputOnly)
-    Res.push_back("-empty-input-only");
   if (Opts.RelocatablePCH)
     Res.push_back("-relocatable-pch");
   if (Opts.ShowHelp)
@@ -878,6 +877,8 @@ ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
       Opts.ProgramAction = frontend::GeneratePCH; break;
     case OPT_emit_pth:
       Opts.ProgramAction = frontend::GeneratePTH; break;
+    case OPT_init_only:
+      Opts.ProgramAction = frontend::InitOnly; break;
     case OPT_parse_noop:
       Opts.ProgramAction = frontend::ParseNoop; break;
     case OPT_parse_print_callbacks:
@@ -915,7 +916,6 @@ ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
   Opts.DebugCodeCompletionPrinter =
     !Args.hasArg(OPT_no_code_completion_debug_printer);
   Opts.DisableFree = Args.hasArg(OPT_disable_free);
-  Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
 
   Opts.FixItLocations.clear();
   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
diff --git a/lib/Frontend/FrontendActions.cpp b/lib/Frontend/FrontendActions.cpp
index 1077f9eb34..251b8e4cb7 100644
--- a/lib/Frontend/FrontendActions.cpp
+++ b/lib/Frontend/FrontendActions.cpp
@@ -23,6 +23,18 @@
 using namespace clang;
 
 //===----------------------------------------------------------------------===//
+// Custom Actions
+//===----------------------------------------------------------------------===//
+
+ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
+                                               llvm::StringRef InFile) {
+  return new ASTConsumer();
+}
+
+void InitOnlyAction::ExecuteAction() {
+}
+
+//===----------------------------------------------------------------------===//
 // AST Consumer Actions
 //===----------------------------------------------------------------------===//