[clangd] Remove the recovery-ast options.

These force a couple of flags or that are now on by default.
So the flags don't currently do anything unless the compile command has
-fno-recovery-ast explicitly.

(For turning recovery *off* for debugging we can inject the flag with config)

This leaves the command-line flags around with no effect, I'm planning to add
a "retired flag" mechanism shortly in a separate patch.

Differential Revision: https://reviews.llvm.org/D94724

Author: sam-mccall

clang-tools-extra/clangd/ClangdServer.cpp

@@ -147,8 +147,6 @@ ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
                      : nullptr),
       ClangTidyProvider(Opts.ClangTidyProvider),
       SuggestMissingIncludes(Opts.SuggestMissingIncludes),
-      BuildRecoveryAST(Opts.BuildRecoveryAST),
-      PreserveRecoveryASTType(Opts.PreserveRecoveryASTType),
       WorkspaceRoot(Opts.WorkspaceRoot),
       // Pass a callback into `WorkScheduler` to extract symbols from a newly
       // parsed file and rebuild the file index synchronously each time an AST
@@ -214,8 +212,6 @@ void ClangdServer::addDocument(PathRef File, llvm::StringRef Contents,
   Inputs.Opts = std::move(Opts);
   Inputs.Index = Index;
   Inputs.ClangTidyProvider = ClangTidyProvider;
-  Inputs.Opts.BuildRecoveryAST = BuildRecoveryAST;
-  Inputs.Opts.PreserveRecoveryASTType = PreserveRecoveryASTType;
   bool NewFile = WorkScheduler.update(File, Inputs, WantDiags);
   // If we loaded Foo.h, we want to make sure Foo.cpp is indexed.
   if (NewFile && BackgroundIdx)
@@ -253,8 +249,6 @@ void ClangdServer::codeComplete(PathRef File, Position Pos,
     }
     ParseInputs ParseInput{IP->Command, &TFS, IP->Contents.str()};
     ParseInput.Index = Index;
-    ParseInput.Opts.BuildRecoveryAST = BuildRecoveryAST;
-    ParseInput.Opts.PreserveRecoveryASTType = PreserveRecoveryASTType;
 
     CodeCompleteOpts.MainFileSignals = IP->Signals;
     // FIXME(ibiryukov): even if Preamble is non-null, we may want to check
@@ -300,8 +294,6 @@ void ClangdServer::signatureHelp(PathRef File, Position Pos,
 
     ParseInputs ParseInput{IP->Command, &TFS, IP->Contents.str()};
     ParseInput.Index = Index;
-    ParseInput.Opts.BuildRecoveryAST = BuildRecoveryAST;
-    ParseInput.Opts.PreserveRecoveryASTType = PreserveRecoveryASTType;
     CB(clangd::signatureHelp(File, Pos, *PreambleData, ParseInput));
   };
 

clang-tools-extra/clangd/ClangdServer.h

@@ -118,14 +118,6 @@ class ClangdServer {
     /// checks will be disabled.
     TidyProviderRef ClangTidyProvider;
 
-    /// If true, force -frecovery-ast flag.
-    /// If false, respect the value in clang.
-    bool BuildRecoveryAST = false;
-
-    /// If true, force -frecovery-ast-type flag.
-    /// If false, respect the value in clang.
-    bool PreserveRecoveryASTType = false;
-
     /// Clangd's workspace root. Relevant for "workspace" operations not bound
     /// to a particular file.
     /// FIXME: If not set, should use the current working directory.
@@ -388,11 +380,6 @@ class ClangdServer {
   // can be caused by missing includes (e.g. member access in incomplete type).
   bool SuggestMissingIncludes = false;
 
-  // If true, preserve expressions in AST for broken code.
-  bool BuildRecoveryAST = true;
-  // If true, preserve the type for recovery AST.
-  bool PreserveRecoveryASTType = false;
-
   // GUARDED_BY(CachedCompletionFuzzyFindRequestMutex)
   llvm::StringMap<llvm::Optional<FuzzyFindRequest>>
       CachedCompletionFuzzyFindRequestByFile;

clang-tools-extra/clangd/Compiler.cpp

@@ -85,11 +85,6 @@ buildCompilerInvocation(const ParseInputs &Inputs, clang::DiagnosticConsumer &D,
   // Don't crash on `#pragma clang __debug parser_crash`
   CI->getPreprocessorOpts().DisablePragmaDebugCrash = true;
 
-  if (Inputs.Opts.BuildRecoveryAST)
-    CI->getLangOpts()->RecoveryAST = true;
-  if (Inputs.Opts.PreserveRecoveryASTType)
-    CI->getLangOpts()->RecoveryASTType = true;
-
   return CI;
 }
 

clang-tools-extra/clangd/Compiler.h

@@ -38,8 +38,6 @@ class IgnoreDiagnostics : public DiagnosticConsumer {
 // Options to run clang e.g. when parsing AST.
 struct ParseOptions {
   bool SuggestMissingIncludes = false;
-  bool BuildRecoveryAST = false;
-  bool PreserveRecoveryASTType = false;
 };
 
 /// Information required to run clang, e.g. to parse AST or do code completion.

clang-tools-extra/clangd/tool/ClangdMain.cpp

@@ -312,14 +312,15 @@ opt<bool> RecoveryAST{
     "recovery-ast",
     cat(Features),
     desc("Preserve expressions in AST for broken code."),
-    init(ClangdServer::Options().BuildRecoveryAST),
+    init(false),
+    Hidden,
 };
 
 opt<bool> RecoveryASTType{
     "recovery-ast-type",
     cat(Features),
     desc("Preserve the type for recovery AST."),
-    init(ClangdServer::Options().PreserveRecoveryASTType),
+    init(false),
     Hidden,
 };
 
@@ -813,8 +814,6 @@ clangd accepts flags on the commandline, and in the CLANGD_FLAGS environment var
     Opts.StaticIndex = PAI.get();
   }
   Opts.AsyncThreadsCount = WorkerThreadsCount;
-  Opts.BuildRecoveryAST = RecoveryAST;
-  Opts.PreserveRecoveryASTType = RecoveryASTType;
   Opts.FoldingRanges = FoldingRanges;
   Opts.MemoryCleanup = getMemoryCleanupFunction();