Distinguish the various kinds of AST file loading failures:

file corruption, compiler version mismatch, target/language
configuration mismatch, out-of-date AST file. No functionality change
yet.

llvm-svn: 166446

3 files changed, 16 insertions, 4 deletions

diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index bf78ac51ec6..11bd33ec418 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -814,7 +814,10 @@ ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
     break;
 
   case ASTReader::Failure:
-  case ASTReader::IgnorePCH:
+  case ASTReader::OutOfDate:
+  case ASTReader::VersionMismatch:
+  case ASTReader::ConfigurationMismatch:
+  case ASTReader::HadErrors:
     AST->getDiagnostics().Report(diag::err_fe_unable_to_load_pch);
     return NULL;
   }
diff --git a/clang/lib/Frontend/ChainedIncludesSource.cpp b/clang/lib/Frontend/ChainedIncludesSource.cpp
index 5f7ff74bc6f..bfe0693ad4c 100644
--- a/clang/lib/Frontend/ChainedIncludesSource.cpp
+++ b/clang/lib/Frontend/ChainedIncludesSource.cpp
@@ -46,7 +46,10 @@ static ASTReader *createASTReader(CompilerInstance &CI,
     return Reader.take();
 
   case ASTReader::Failure:
-  case ASTReader::IgnorePCH:
+  case ASTReader::OutOfDate:
+  case ASTReader::VersionMismatch:
+  case ASTReader::ConfigurationMismatch:
+  case ASTReader::HadErrors:
     break;
   }
   return 0;
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index a8cafdbfeff..225bc137fb3 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -354,7 +354,10 @@ CompilerInstance::createPCHExternalASTSource(StringRef Path,
     // Unrecoverable failure: don't even try to process the input file.
     break;
 
-  case ASTReader::IgnorePCH:
+  case ASTReader::OutOfDate:
+  case ASTReader::VersionMismatch:
+  case ASTReader::ConfigurationMismatch:
+  case ASTReader::HadErrors:
     // No suitable PCH file could be found. Return an error.
     break;
   }
@@ -966,7 +969,10 @@ Module *CompilerInstance::loadModule(SourceLocation ImportLoc,
     case ASTReader::Success:
       break;
 
-    case ASTReader::IgnorePCH:
+    case ASTReader::OutOfDate:
+    case ASTReader::VersionMismatch:
+    case ASTReader::ConfigurationMismatch:
+    case ASTReader::HadErrors:
       // FIXME: The ASTReader will already have complained, but can we showhorn
       // that diagnostic information into a more useful form?
       KnownModules[Path[0].first] = 0;