r305902 - Fixed compiler warnings after r305890.

[Ilya Biryukov via cfe-commits]

Author: ibiryukov
Date: Wed Jun 21 07:34:27 2017
New Revision: 305902

URL: http://llvm.org/viewvc/llvm-project?rev=305902&view=rev
Log:
Fixed compiler warnings after r305890.

Should fix buildbots that pass -Werror.

Modified:
    cfe/trunk/lib/Frontend/ASTUnit.cpp

Modified: cfe/trunk/lib/Frontend/ASTUnit.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/ASTUnit.cpp?rev=305902&r1=305901&r2=305902&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/ASTUnit.cpp (original)
+++ cfe/trunk/lib/Frontend/ASTUnit.cpp Wed Jun 21 07:34:27 2017
@@ -924,9 +924,6 @@ public:
 
 class ASTUnitPreambleCallbacks : public PreambleCallbacks {
 public:
-  ASTUnitPreambleCallbacks(llvm::SmallVectorImpl<StoredDiagnostic> &StoredDiags)
-      : StoredDiags(StoredDiags) {}
-
   unsigned getHash() const { return Hash; }
 
   std::vector<Decl *> takeTopLevelDecls() { return std::move(TopLevelDecls); }
@@ -964,7 +961,6 @@ public:
   }
 
 private:
-  llvm::SmallVectorImpl<StoredDiagnostic> &StoredDiags;
   unsigned Hash = 0;
   std::vector<Decl *> TopLevelDecls;
   std::vector<serialization::DeclID> TopLevelDeclIDs;
@@ -1259,7 +1255,7 @@ ASTUnit::getMainBufferWithPrecompiledPre
 
   SmallVector<StandaloneDiagnostic, 4> NewPreambleDiagsStandalone;
   SmallVector<StoredDiagnostic, 4> NewPreambleDiags;
-  ASTUnitPreambleCallbacks Callbacks(NewPreambleDiags);
+  ASTUnitPreambleCallbacks Callbacks;
   {
     llvm::Optional<CaptureDroppedDiagnostics> Capture;
     if (CaptureDiagnostics)
@@ -1282,18 +1278,16 @@ ASTUnit::getMainBufferWithPrecompiledPre
       case BuildPreambleError::PreambleIsEmpty:
         // Try again next time.
         PreambleRebuildCounter = 1;
-        break;
+        return nullptr;
       case BuildPreambleError::CouldntCreateTargetInfo:
       case BuildPreambleError::BeginSourceFileFailed:
       case BuildPreambleError::CouldntEmitPCH:
       case BuildPreambleError::CouldntCreateVFSOverlay:
         // These erros are more likely to repeat, retry after some period.
         PreambleRebuildCounter = DefaultPreambleRebuildInterval;
-        break;
-      default:
-        llvm_unreachable("unexpected BuildPreambleError");
+        return nullptr;
       }
-      return nullptr;
+      llvm_unreachable("unexpected BuildPreambleError");
     }
   }