Implement -fno-validate-pch at the -cc1 level, which suppresses most

of the usual consistency checks used to determine when a precompiled
header is incompatible with the translation unit it's being loaded
into.

Enable this option when loading a precompiled preamble, because the
preamble loader will be performing all of this checking itself. Enable
the preamble-based test now that it's working.

This option is also useful for debugging Clang's PCH
(<rdar://problem/7532213>).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109475 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/include/clang/Frontend/PreprocessorOptions.h b/include/clang/Frontend/PreprocessorOptions.h
index f2154955c2..851c1f0108 100644
--- a/include/clang/Frontend/PreprocessorOptions.h
+++ b/include/clang/Frontend/PreprocessorOptions.h
@@ -43,6 +43,10 @@ public:
   /// The implicit PCH included at the start of the translation unit, or empty.
   std::string ImplicitPCHInclude;
 
+  /// \brief When true, disables most of the normal validation performed on
+  /// precompiled headers.
+  bool DisablePCHValidation;
+  
   /// \brief If non-zero, the implicit PCH include is actually a precompiled
   /// preamble that covers this number of bytes in the main source file.
   ///
@@ -113,6 +117,7 @@ public:
   
 public:
   PreprocessorOptions() : UsePredefines(true), DetailedRecord(false),
+                          DisablePCHValidation(false),
                           PrecompiledPreambleBytes(0, true),
                           RetainRemappedFileBuffers(false) { }