Implement serialization/deserialization of LangOptions in the PCH
file. When de-serializing LangOptions, we check that the
currently-provided language options are consistent with the options
used to compile the PCH file. If they are not, we emit a diagnostic
and ignore the PCH file.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68820 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
index 6f4492b..6feb726 100644
--- a/lib/Frontend/PCHWriter.cpp
+++ b/lib/Frontend/PCHWriter.cpp
@@ -328,6 +328,67 @@
// PCHWriter Implementation
//===----------------------------------------------------------------------===//
+void PCHWriter::WriteLanguageOptions(const LangOptions &LangOpts) {
+ RecordData Record;
+ Record.push_back(LangOpts.Trigraphs);
+ Record.push_back(LangOpts.BCPLComment); // BCPL-style '//' comments.
+ Record.push_back(LangOpts.DollarIdents); // '$' allowed in identifiers.
+ Record.push_back(LangOpts.AsmPreprocessor); // Preprocessor in asm mode.
+ Record.push_back(LangOpts.GNUMode); // True in gnu99 mode false in c99 mode (etc)
+ Record.push_back(LangOpts.ImplicitInt); // C89 implicit 'int'.
+ Record.push_back(LangOpts.Digraphs); // C94, C99 and C++
+ Record.push_back(LangOpts.HexFloats); // C99 Hexadecimal float constants.
+ Record.push_back(LangOpts.C99); // C99 Support
+ Record.push_back(LangOpts.Microsoft); // Microsoft extensions.
+ Record.push_back(LangOpts.CPlusPlus); // C++ Support
+ Record.push_back(LangOpts.CPlusPlus0x); // C++0x Support
+ Record.push_back(LangOpts.NoExtensions); // All extensions are disabled, strict mode.
+ Record.push_back(LangOpts.CXXOperatorNames); // Treat C++ operator names as keywords.
+
+ Record.push_back(LangOpts.ObjC1); // Objective-C 1 support enabled.
+ Record.push_back(LangOpts.ObjC2); // Objective-C 2 support enabled.
+ Record.push_back(LangOpts.ObjCNonFragileABI); // Objective-C modern abi enabled
+
+ Record.push_back(LangOpts.PascalStrings); // Allow Pascal strings
+ Record.push_back(LangOpts.Boolean); // Allow bool/true/false
+ Record.push_back(LangOpts.WritableStrings); // Allow writable strings
+ Record.push_back(LangOpts.LaxVectorConversions);
+ Record.push_back(LangOpts.Exceptions); // Support exception handling.
+
+ Record.push_back(LangOpts.NeXTRuntime); // Use NeXT runtime.
+ Record.push_back(LangOpts.Freestanding); // Freestanding implementation
+ Record.push_back(LangOpts.NoBuiltin); // Do not use builtin functions (-fno-builtin)
+
+ Record.push_back(LangOpts.ThreadsafeStatics); // Whether static initializers are protected
+ // by locks.
+ Record.push_back(LangOpts.Blocks); // block extension to C
+ Record.push_back(LangOpts.EmitAllDecls); // Emit all declarations, even if
+ // they are unused.
+ Record.push_back(LangOpts.MathErrno); // Math functions must respect errno
+ // (modulo the platform support).
+
+ Record.push_back(LangOpts.OverflowChecking); // Extension to call a handler function when
+ // signed integer arithmetic overflows.
+
+ Record.push_back(LangOpts.HeinousExtensions); // Extensions that we really don't like and
+ // may be ripped out at any time.
+
+ Record.push_back(LangOpts.Optimize); // Whether __OPTIMIZE__ should be defined.
+ Record.push_back(LangOpts.OptimizeSize); // Whether __OPTIMIZE_SIZE__ should be
+ // defined.
+ Record.push_back(LangOpts.Static); // Should __STATIC__ be defined (as
+ // opposed to __DYNAMIC__).
+ Record.push_back(LangOpts.PICLevel); // The value for __PIC__, if non-zero.
+
+ Record.push_back(LangOpts.GNUInline); // Should GNU inline semantics be
+ // used (instead of C99 semantics).
+ Record.push_back(LangOpts.NoInline); // Should __NO_INLINE__ be defined.
+ Record.push_back(LangOpts.getGCMode());
+ Record.push_back(LangOpts.getVisibilityMode());
+ Record.push_back(LangOpts.InstantiationDepth);
+ S.EmitRecord(pch::LANGUAGE_OPTIONS, Record);
+}
+
//===----------------------------------------------------------------------===//
// Source Manager Serialization
//===----------------------------------------------------------------------===//
@@ -625,9 +686,6 @@
// Exit the types block
S.ExitBlock();
-
- // Write the type offsets record
- S.EmitRecord(pch::TYPE_OFFSET, TypeOffsets);
}
/// \brief Write the block containing all of the declaration IDs
@@ -740,9 +798,6 @@
// Exit the declarations block
S.ExitBlock();
-
- // Write the declaration offsets record
- S.EmitRecord(pch::DECL_OFFSET, DeclOffsets);
}
PCHWriter::PCHWriter(llvm::BitstreamWriter &S)
@@ -761,10 +816,13 @@
// Write the remaining PCH contents.
S.EnterSubblock(pch::PCH_BLOCK_ID, 2);
+ WriteLanguageOptions(Context.getLangOptions());
WriteSourceManagerBlock(Context.getSourceManager());
WritePreprocessor(PP);
WriteTypesBlock(Context);
WriteDeclsBlock(Context);
+ S.EmitRecord(pch::TYPE_OFFSET, TypeOffsets);
+ S.EmitRecord(pch::DECL_OFFSET, DeclOffsets);
S.ExitBlock();
}