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Discard metadata produced by LLVM 2.7. The value enumeration it used

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is different from what the code now uses in a two ways: NamedMDNodes
were considered Values and included in the numbering, and the
function-local metadata counter wasn't reset between functions.

The later problem breaks lazy deserialization, so instead of trying
to emulate the old numbering, just drop the old metadata. The only
in-tree use case is debug info with LTO, where the QOI loss is
considered acceptable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113557 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-09-09 23:12:39 +00:00
parent 1ab6f2fa7a
commit 70c2fc0823
4 changed files with 72 additions and 22 deletions
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14
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -485,8 +485,8 @@ static void WriteMDNode(const MDNode *N,
Record.push_back(0);
}
}
unsigned MDCode = N->isFunctionLocal() ? bitc::METADATA_FN_NODE :
bitc::METADATA_NODE;
unsigned MDCode = N->isFunctionLocal() ? bitc::METADATA_FN_NODE2 :
bitc::METADATA_NODE2;
Stream.EmitRecord(MDCode, Record, 0);
Record.clear();
}
@ -549,7 +549,7 @@ static void WriteModuleMetadata(const Module *M,
// Write named metadata operands.
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
Record.push_back(VE.getValueID(NMD->getOperand(i)));
Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
Stream.EmitRecord(bitc::METADATA_NAMED_NODE2, Record, 0);
Record.clear();
}
@ -585,7 +585,7 @@ static void WriteMetadataAttachment(const Function &F,
SmallVector<uint64_t, 64> Record;
// Write metadata attachments
// METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
// METADATA_ATTACHMENT2 - [m x [value, [n x [id, mdnode]]]
SmallVector<std::pair<unsigned, MDNode*>, 4> MDs;
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
@ -603,7 +603,7 @@ static void WriteMetadataAttachment(const Function &F,
Record.push_back(MDs[i].first);
Record.push_back(VE.getValueID(MDs[i].second));
}
Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
Stream.EmitRecord(bitc::METADATA_ATTACHMENT2, Record, 0);
Record.clear();
}
@ -1111,7 +1111,7 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
const PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
Code = bitc::FUNC_CODE_INST_CALL;
Code = bitc::FUNC_CODE_INST_CALL2;
Vals.push_back(VE.getAttributeID(CI.getAttributes()));
Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()));
@ -1255,7 +1255,7 @@ static void WriteFunction(const Function &F, ValueEnumerator &VE,
Vals.push_back(DL.getCol());
Vals.push_back(Scope ? VE.getValueID(Scope)+1 : 0);
Vals.push_back(IA ? VE.getValueID(IA)+1 : 0);
Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC2, Vals);
Vals.clear();
LastDL = DL;