Support -frewrite-includes as an option while preprocessing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158460 91177308-0d34-0410-b5e6-96231b3b80d8

Author: dwblaikie

include/clang/Driver/CC1Options.td

@@ -332,8 +332,6 @@ def rewrite_test : Flag<"-rewrite-test">,
   HelpText<"Rewriter playground">;
 def rewrite_macros : Flag<"-rewrite-macros">,
   HelpText<"Expand macros without full preprocessing">;
-def frewrite_includes : Flag<"-frewrite-includes">,
-  HelpText<"Expand includes without full preprocessing">;
 def migrate : Flag<"-migrate">,
   HelpText<"Migrate source code">;
 }
@@ -495,6 +493,8 @@ def token_cache : Separate<"-token-cache">, MetaVarName<"<path>">,
   HelpText<"Use specified token cache file">;
 def detailed_preprocessing_record : Flag<"-detailed-preprocessing-record">,
   HelpText<"include a detailed record of preprocessing actions">;
+def frewrite_includes : Flag<"-frewrite-includes">,
+  HelpText<"Expand includes without full preprocessing">;
 
 //===----------------------------------------------------------------------===//
 // OpenCL Options

include/clang/Frontend/FrontendOptions.h

@@ -43,7 +43,6 @@ namespace frontend {
     PrintPreamble,          ///< Print the "preamble" of the input file
     PrintPreprocessedInput, ///< -E mode.
     RewriteMacros,          ///< Expand macros but not \#includes.
-    RewriteIncludes,        ///< Expand \#includes but not macros.
     RewriteObjC,            ///< ObjC->C Rewriter.
     RewriteTest,            ///< Rewriter playground
     RunAnalysis,            ///< Run one or more source code analyses.

include/clang/Frontend/PreprocessorOutputOptions.h

@@ -21,6 +21,7 @@ class PreprocessorOutputOptions {
   unsigned ShowLineMarkers : 1;    ///< Show \#line markers.
   unsigned ShowMacroComments : 1;  ///< Show comments, even in macros.
   unsigned ShowMacros : 1;         ///< Print macro definitions.
+  unsigned RewriteIncludes : 1;    ///< Preprocess include directives only.
 
 public:
   PreprocessorOutputOptions() {
@@ -29,6 +30,7 @@ class PreprocessorOutputOptions {
     ShowLineMarkers = 1;
     ShowMacroComments = 0;
     ShowMacros = 0;
+    RewriteIncludes = 0;
   }
 };
 

lib/Frontend/CompilerInvocation.cpp

@@ -445,7 +445,6 @@ static const char *getActionName(frontend::ActionKind Kind) {
   case frontend::PrintPreamble:          return "-print-preamble";
   case frontend::PrintPreprocessedInput: return "-E";
   case frontend::RewriteMacros:          return "-rewrite-macros";
-  case frontend::RewriteIncludes:        return "-frewrite-includes";
   case frontend::RewriteObjC:            return "-rewrite-objc";
   case frontend::RewriteTest:            return "-rewrite-test";
   case frontend::RunAnalysis:            return "-analyze";
@@ -1446,8 +1445,6 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
     case OPT_rewrite_macros:
       Opts.ProgramAction = frontend::RewriteMacros; break;
-    case OPT_frewrite_includes:
-      Opts.ProgramAction = frontend::RewriteIncludes; break;
     case OPT_rewrite_objc:
       Opts.ProgramAction = frontend::RewriteObjC; break;
     case OPT_rewrite_test:
@@ -2144,6 +2141,7 @@ static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
+  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
 }
 
 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {

lib/FrontendTool/ExecuteCompilerInvocation.cpp

@@ -71,9 +71,13 @@ static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
 
   case PrintDeclContext:       return new DeclContextPrintAction();
   case PrintPreamble:          return new PrintPreambleAction();
-  case PrintPreprocessedInput: return new PrintPreprocessedAction();
+  case PrintPreprocessedInput: {
+    if (CI.getPreprocessorOutputOpts().RewriteIncludes)
+      return new RewriteIncludesAction();
+    return new PrintPreprocessedAction();
+  }
+
   case RewriteMacros:          return new RewriteMacrosAction();
-  case RewriteIncludes:        return new RewriteIncludesAction();
   case RewriteObjC:            return new RewriteObjCAction();
   case RewriteTest:            return new RewriteTestAction();
   case RunAnalysis:            return new ento::AnalysisAction();