Compare the predefines buffer in the PCH file with the predefines

buffer generated for the current translation unit. If they are
different, complain and then ignore the PCH file. This effectively
checks for all compilation options that somehow would affect
preprocessor state (-D, -U, -include, the dreaded -imacros, etc.).

When we do accept the PCH file, throw away the contents of the
predefines buffer rather than parsing them, since all of the results
of that parsing are already stored in the PCH file. This eliminates
the ugliness with the redefinition of __builtin_va_list, among other
things.

llvm-svn: 68838

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Frontend/PCHWriter.cpp b/clang/lib/Frontend/PCHWriter.cpp
index 09080d640b5..4963ea11608 100644
--- a/clang/lib/Frontend/PCHWriter.cpp
+++ b/clang/lib/Frontend/PCHWriter.cpp
@@ -872,7 +872,7 @@ void PCHWriter::AddTypeRef(QualType T, RecordData &Record) {
   }
 
   if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr())) {
-    pch::TypeID ID;
+    pch::TypeID ID = 0;
     switch (BT->getKind()) {
     case BuiltinType::Void:       ID = pch::PREDEF_TYPE_VOID_ID;       break;
     case BuiltinType::Bool:       ID = pch::PREDEF_TYPE_BOOL_ID;       break;