From 5c7006e06283a61b26783a8141936466ad3dd3c7 Mon Sep 17 00:00:00 2001 From: "Duncan P. N. Exon Smith" Date: Thu, 11 Dec 2014 23:02:24 +0000 Subject: Bitcode: Add METADATA_NODE and METADATA_VALUE This reflects the typelessness of `Metadata` in the bitcode format, removing types from all metadata operands. `METADATA_VALUE` represents a `ValueAsMetadata`, and always has two fields: the type and the value. `METADATA_NODE` represents an `MDNode`, and unlike `METADATA_OLD_NODE`, doesn't store types. It stores operands at their ID+1 so that `0` can reference `nullptr` operands. Part of PR21532. llvm-svn: 224073 --- llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp') diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp index a92b9c8..4265bf7 100644 --- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp @@ -1166,6 +1166,27 @@ std::error_code BitcodeReader::ParseMetadata() { MDValueList.AssignValue(MDNode::get(Context, Elts), NextMDValueNo++); break; } + case bitc::METADATA_VALUE: { + if (Record.size() != 2) + return Error(BitcodeError::InvalidRecord); + + Type *Ty = getTypeByID(Record[0]); + if (Ty->isMetadataTy() || Ty->isVoidTy()) + return Error(BitcodeError::InvalidRecord); + + MDValueList.AssignValue( + ValueAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)), + NextMDValueNo++); + break; + } + case bitc::METADATA_NODE: { + SmallVector Elts; + Elts.reserve(Record.size()); + for (unsigned ID : Record) + Elts.push_back(ID ? MDValueList.getValueFwdRef(ID - 1) : nullptr); + MDValueList.AssignValue(MDNode::get(Context, Elts), NextMDValueNo++); + break; + } case bitc::METADATA_STRING: { std::string String(Record.begin(), Record.end()); llvm::UpgradeMDStringConstant(String); -- cgit v1.1