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[serialization] Codify the bringup hack with a special note in the module file.

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The bringup hack, again, is to just process the module source files as a
TranslationUnit if the module doesn't accurately represent the original
source. Currently this happens if the module is not empty, or if it imports
/anything/, since we don't actually serialize anything yet.

This also cleans up the decl/type serialization skeleton a bit.

Swift SVN r5238
This commit is contained in:
Jordan Rose
2013-05-20 22:50:39 +00:00
parent b9b0789908
commit ea0d5031ab
5 changed files with 109 additions and 51 deletions
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7
lib/Serialization/ModuleFile.cpp
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@@ -65,7 +65,7 @@ ModuleFile::ModuleFile(llvm::OwningPtr<llvm::MemoryBuffer> &&input)
: InputFile(std::move(input)),
InputReader(reinterpret_cast<const uint8_t *>(InputFile->getBufferStart()),
reinterpret_cast<const uint8_t *>(InputFile->getBufferEnd())),
Status(ModuleStatus::FallBackToTranslationUnit) {
Status(ModuleStatus::Valid) {
llvm::BitstreamCursor cursor{InputReader};
for (unsigned char byte : SIGNATURE) {
@@ -129,6 +129,11 @@ ModuleFile::ModuleFile(llvm::OwningPtr<llvm::MemoryBuffer> &&input)
break;
}
case FALL_BACK_TO_TRANSLATION_UNIT_ID:
// This is a bring-up hack and will eventually go away.
Status = ModuleStatus::FallBackToTranslationUnit;
break;
default:
// Unknown top-level block, possibly for use by a future version of the
// module format.