[modules] Consistently construct a buffer as input to build the module.
This means the main file for modules will always be a virtual one.
llvm-svn: 165591
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index cdb9646..d060e79 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -1111,7 +1111,7 @@
return Failure;
}
- if (!DisableValidation &&
+ if (!DisableValidation && !OverriddenBuffer &&
((off_t)Record[4] != File->getSize()
#if !defined(LLVM_ON_WIN32)
// In our regression testing, the Windows file system seems to