emit function-like and object-like macros to the PCH file.
Note that we don't do anything useful with identifier infos yet
and don't emit the tokens that the macros are defined to.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68797 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
index f80d46a..05447dc 100644
--- a/lib/Frontend/PCHWriter.cpp
+++ b/lib/Frontend/PCHWriter.cpp
@@ -17,6 +17,8 @@
#include "clang/AST/DeclContextInternals.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/Type.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Bitcode/BitstreamWriter.h"
@@ -481,8 +483,56 @@
// Enter the preprocessor block.
S.EnterSubblock(pch::PREPROCESSOR_BLOCK_ID, 3);
+ // If the PCH file contains __DATE__ or __TIME__ emit a warning about this.
+ // FIXME: use diagnostics subsystem for localization etc.
+ if (PP.SawDateOrTime())
+ fprintf(stderr, "warning: precompiled header used __DATE__ or __TIME__.\n");
+ RecordData Record;
+ // Loop over all the macro definitions that are live at the end of the file,
+ // emitting each to the PP section.
+ // FIXME: Eventually we want to emit an index so that we can lazily load
+ // macros.
+ for (Preprocessor::macro_iterator I = PP.macro_begin(), E = PP.macro_end();
+ I != E; ++I) {
+ MacroInfo *MI = I->second;
+
+ // Don't emit builtin macros like __LINE__ to the PCH file unless they have
+ // been redefined by the header (in which case they are not isBuiltinMacro).
+ if (MI->isBuiltinMacro())
+ continue;
+
+ IdentifierInfo *II = I->first;
+
+ // FIXME: Output the identifier Info ID #!
+ Record.push_back((intptr_t)II);
+ Record.push_back(MI->getDefinitionLoc().getRawEncoding());
+ Record.push_back(MI->isUsed());
+
+ unsigned Code;
+ if (MI->isObjectLike()) {
+ Code = pch::PP_MACRO_OBJECT_LIKE;
+ } else {
+ Code = pch::PP_MACRO_FUNCTION_LIKE;
+
+ Record.push_back(MI->isC99Varargs());
+ Record.push_back(MI->isGNUVarargs());
+ Record.push_back(MI->getNumArgs());
+ for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end();
+ I != E; ++I)
+ // FIXME: Output the identifier Info ID #!
+ Record.push_back((intptr_t)II);
+ }
+ S.EmitRecord(Code, Record);
+ Record.clear();
+
+ // FIXME: Emit the tokens array.
+
+ }
+
+ // TODO: someday when PP supports __COUNTER__, emit a record for its value if
+ // non-zero.
S.ExitBlock();
}