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remove bitcode reader support for LLVM 2.7 metadata encoding.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133268 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2011-06-17 17:48:53 +00:00
parent b0884ddf70
commit 020a5a449f
4 changed files with 6 additions and 61 deletions
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12
include/llvm/Bitcode/LLVMBitCodes.h
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@ -112,16 +112,12 @@ namespace bitc {
enum MetadataCodes {
METADATA_STRING = 1, // MDSTRING: [values]
// FIXME: Remove NODE in favor of NODE2 in LLVM 3.0
METADATA_NODE = 2, // NODE with potentially invalid metadata
// FIXME: Remove FN_NODE in favor of FN_NODE2 in LLVM 3.0
METADATA_FN_NODE = 3, // FN_NODE with potentially invalid metadata
// 2 is unused.
// 3 is unused.
METADATA_NAME = 4, // STRING: [values]
// FIXME: Remove NAMED_NODE in favor of NAMED_NODE2 in LLVM 3.0
METADATA_NAMED_NODE = 5, // NAMED_NODE with potentially invalid metadata
// 5 is unused.
METADATA_KIND = 6, // [n x [id, name]]
// FIXME: Remove ATTACHMENT in favor of ATTACHMENT2 in LLVM 3.0
METADATA_ATTACHMENT = 7, // ATTACHMENT with potentially invalid metadata
// 7 is unused.
METADATA_NODE2 = 8, // NODE2: [n x (type num, value num)]
METADATA_FN_NODE2 = 9, // FN_NODE2: [n x (type num, value num)]
METADATA_NAMED_NODE2 = 10, // NAMED_NODE2: [n x mdnodes]

41
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -791,12 +791,8 @@ bool BitcodeReader::ParseMetadata() {
Code = Stream.ReadCode();
// METADATA_NAME is always followed by METADATA_NAMED_NODE2.
// Or METADATA_NAMED_NODE in LLVM 2.7. FIXME: Remove this in LLVM 3.0.
unsigned NextBitCode = Stream.ReadRecord(Code, Record);
if (NextBitCode == bitc::METADATA_NAMED_NODE) {
LLVM2_7MetadataDetected = true;
} else if (NextBitCode != bitc::METADATA_NAMED_NODE2)
assert ( 0 && "Invalid Named Metadata record");
assert(NextBitCode == bitc::METADATA_NAMED_NODE2); (void)NextBitCode;
// Read named metadata elements.
unsigned Size = Record.size();
@ -807,27 +803,12 @@ bool BitcodeReader::ParseMetadata() {
return Error("Malformed metadata record");
NMD->addOperand(MD);
}
// Backwards compatibility hack: NamedMDValues used to be Values,
// and they got their own slots in the value numbering. They are no
// longer Values, however we still need to account for them in the
// numbering in order to be able to read old bitcode files.
// FIXME: Remove this in LLVM 3.0.
if (LLVM2_7MetadataDetected)
MDValueList.AssignValue(0, NextMDValueNo++);
break;
}
case bitc::METADATA_FN_NODE: // FIXME: Remove in LLVM 3.0.
case bitc::METADATA_FN_NODE2:
IsFunctionLocal = true;
// fall-through
case bitc::METADATA_NODE: // FIXME: Remove in LLVM 3.0.
case bitc::METADATA_NODE2: {
// Detect 2.7-era metadata.
// FIXME: Remove in LLVM 3.0.
if (Code == bitc::METADATA_FN_NODE || Code == bitc::METADATA_NODE)
LLVM2_7MetadataDetected = true;
if (Record.size() % 2 == 1)
return Error("Invalid METADATA_NODE2 record");
@ -1755,9 +1736,6 @@ bool BitcodeReader::ParseMetadataAttachment() {
switch (Stream.ReadRecord(Code, Record)) {
default: // Default behavior: ignore.
break;
// FIXME: Remove in LLVM 3.0.
case bitc::METADATA_ATTACHMENT:
LLVM2_7MetadataDetected = true;
case bitc::METADATA_ATTACHMENT2: {
unsigned RecordLength = Record.size();
if (Record.empty() || (RecordLength - 1) % 2 == 1)
@ -1870,9 +1848,6 @@ bool BitcodeReader::ParseFunctionBody(Function *F) {
I = 0;
continue;
// FIXME: Remove this in LLVM 3.0.
case bitc::FUNC_CODE_DEBUG_LOC:
LLVM2_7MetadataDetected = true;
case bitc::FUNC_CODE_DEBUG_LOC2: { // DEBUG_LOC: [line, col, scope, ia]
I = 0; // Get the last instruction emitted.
if (CurBB && !CurBB->empty())
@ -2393,7 +2368,6 @@ bool BitcodeReader::ParseFunctionBody(Function *F) {
}
// FIXME: Remove this in LLVM 3.0.
case bitc::FUNC_CODE_INST_CALL:
LLVM2_7MetadataDetected = true;
case bitc::FUNC_CODE_INST_CALL2: {
// CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
if (Record.size() < 3)
@ -2513,23 +2487,10 @@ bool BitcodeReader::ParseFunctionBody(Function *F) {
BlockAddrFwdRefs.erase(BAFRI);
}
// FIXME: Remove this in LLVM 3.0.
unsigned NewMDValueListSize = MDValueList.size();
// Trim the value list down to the size it was before we parsed this function.
ValueList.shrinkTo(ModuleValueListSize);
MDValueList.shrinkTo(ModuleMDValueListSize);
// Backwards compatibility hack: Function-local metadata numbers
// were previously not reset between functions. This is now fixed,
// however we still need to understand the old numbering in order
// to be able to read old bitcode files.
// FIXME: Remove this in LLVM 3.0.
if (LLVM2_7MetadataDetected)
MDValueList.resize(NewMDValueListSize);
std::vector<BasicBlock*>().swap(FunctionBBs);
return false;
}

9
lib/Bitcode/Reader/BitcodeReader.h
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@ -174,17 +174,10 @@ class BitcodeReader : public GVMaterializer {
typedef std::pair<unsigned, GlobalVariable*> BlockAddrRefTy;
DenseMap<Function*, std::vector<BlockAddrRefTy> > BlockAddrFwdRefs;
/// LLVM2_7MetadataDetected - True if metadata produced by LLVM 2.7 or
/// earlier was detected, in which case we behave slightly differently,
/// for compatibility.
/// FIXME: Remove in LLVM 3.0.
bool LLVM2_7MetadataDetected;
public:
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
: Context(C), TheModule(0), Buffer(buffer), BufferOwned(false),
ErrorString(0), ValueList(C), MDValueList(C),
LLVM2_7MetadataDetected(false) {
ErrorString(0), ValueList(C), MDValueList(C) {
HasReversedFunctionsWithBodies = false;
}
~BitcodeReader() {

5
tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
View File

@ -262,19 +262,14 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
case bitc::METADATA_ATTACHMENT_ID:
switch(CodeID) {
default:return 0;
case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
case bitc::METADATA_ATTACHMENT2: return "METADATA_ATTACHMENT2";
}
case bitc::METADATA_BLOCK_ID:
switch(CodeID) {
default:return 0;
case bitc::METADATA_STRING: return "METADATA_STRING";
case bitc::METADATA_NODE: return "METADATA_NODE";
case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE";
case bitc::METADATA_NAME: return "METADATA_NAME";
case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE";
case bitc::METADATA_KIND: return "METADATA_KIND";
case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
case bitc::METADATA_NODE2: return "METADATA_NODE2";
case bitc::METADATA_FN_NODE2: return "METADATA_FN_NODE2";
case bitc::METADATA_NAMED_NODE2: return "METADATA_NAMED_NODE2";