static uint64_t readAbbreviatedField(BitstreamCursor &Cursor,
const BitCodeAbbrevOp &Op) {
assert(!Op.isLiteral() && "Not to be used with literals!");
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
case BitCodeAbbrevOp::Array:
case BitCodeAbbrevOp::Blob:
llvm_unreachable("Should not reach here");
case BitCodeAbbrevOp::Fixed:
return Cursor.Read((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::VBR:
return Cursor.ReadVBR64((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::Char6:
return BitCodeAbbrevOp::DecodeChar6(Cursor.Read(6));
}
llvm_unreachable("invalid abbreviation encoding");
}
static void skipAbbreviatedField(BitstreamCursor &Cursor,
const BitCodeAbbrevOp &Op) {
assert(!Op.isLiteral() && "Not to be used with literals!");
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
case BitCodeAbbrevOp::Array:
case BitCodeAbbrevOp::Blob:
llvm_unreachable("Should not reach here");
case BitCodeAbbrevOp::Fixed:
Cursor.Read((unsigned)Op.getEncodingData());
break;
case BitCodeAbbrevOp::VBR:
Cursor.ReadVBR64((unsigned)Op.getEncodingData());
break;
case BitCodeAbbrevOp::Char6:
Cursor.Read(6);
break;
}
}
/// ParseBlock - Read a block, updating statistics, etc.
static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
unsigned IndentLevel) {
std::string Indent(IndentLevel*2, ' ');
uint64_t BlockBitStart = Stream.GetCurrentBitNo();
// Get the statistics for this BlockID.
PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
BlockStats.NumInstances++;
// BLOCKINFO is a special part of the stream.
if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n";
if (Stream.ReadBlockInfoBlock())
return Error("Malformed BlockInfoBlock");
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
return false;
}
unsigned NumWords = 0;
if (Stream.EnterSubBlock(BlockID, &NumWords))
return Error("Malformed block record");
const char *BlockName = 0;
if (Dump) {
outs() << Indent << "<";
if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
outs() << BlockName;
else
outs() << "UnknownBlock" << BlockID;
if (NonSymbolic && BlockName)
outs() << " BlockID=" << BlockID;
outs() << " NumWords=" << NumWords
<< " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
}
SmallVector<uint64_t, 64> Record;
// Read all the records for this block.
while (1) {
if (Stream.AtEndOfStream())
return Error("Premature end of bitstream");
uint64_t RecordStartBit = Stream.GetCurrentBitNo();
BitstreamEntry Entry =
Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
switch (Entry.Kind) {
case BitstreamEntry::Error:
return Error("malformed bitcode file");
case BitstreamEntry::EndBlock: {
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
if (Dump) {
outs() << Indent << "</";
if (BlockName)
outs() << BlockName << ">\n";
else
outs() << "UnknownBlock" << BlockID << ">\n";
}
return false;
}
case BitstreamEntry::SubBlock: {
uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
if (ParseBlock(Stream, Entry.ID, IndentLevel+1))
return true;
++BlockStats.NumSubBlocks;
uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
// Don't include subblock sizes in the size of this block.
BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
continue;
}
case BitstreamEntry::Record:
// The interesting case.
break;
}
if (Entry.ID == bitc::DEFINE_ABBREV) {
Stream.ReadAbbrevRecord();
++BlockStats.NumAbbrevs;
continue;
}
Record.clear();
++BlockStats.NumRecords;
StringRef Blob;
unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob);
// Increment the # occurrences of this code.
if (BlockStats.CodeFreq.size() <= Code)
BlockStats.CodeFreq.resize(Code+1);
BlockStats.CodeFreq[Code].NumInstances++;
BlockStats.CodeFreq[Code].TotalBits +=
Stream.GetCurrentBitNo()-RecordStartBit;
if (Entry.ID != bitc::UNABBREV_RECORD) {
BlockStats.CodeFreq[Code].NumAbbrev++;
++BlockStats.NumAbbreviatedRecords;
}
if (Dump) {
outs() << Indent << " <";
if (const char *CodeName =
GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
outs() << CodeName;
else
outs() << "UnknownCode" << Code;
if (NonSymbolic &&
GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
outs() << " codeid=" << Code;
if (Entry.ID != bitc::UNABBREV_RECORD)
outs() << " abbrevid=" << Entry.ID;
for (unsigned i = 0, e = Record.size(); i != e; ++i)
outs() << " op" << i << "=" << (int64_t)Record[i];
outs() << "/>";
if (Blob.data()) {
outs() << " blob data = ";
bool BlobIsPrintable = true;
for (unsigned i = 0, e = Blob.size(); i != e; ++i)
if (!isprint(static_cast<unsigned char>(Blob[i]))) {
BlobIsPrintable = false;
break;
}
if (BlobIsPrintable)
outs() << "'" << Blob << "'";
else
outs() << "unprintable, " << Blob.size() << " bytes.";
}
outs() << "\n";
}
}
}
/// ParseBlock - Read a block, updating statistics, etc.
static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) {
std::string Indent(IndentLevel*2, ' ');
uint64_t BlockBitStart = Stream.GetCurrentBitNo();
unsigned BlockID = Stream.ReadSubBlockID();
// Get the statistics for this BlockID.
PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
BlockStats.NumInstances++;
// BLOCKINFO is a special part of the stream.
if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
if (Dump) errs() << Indent << "<BLOCKINFO_BLOCK/>\n";
if (Stream.ReadBlockInfoBlock())
return Error("Malformed BlockInfoBlock");
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
return false;
}
unsigned NumWords = 0;
if (Stream.EnterSubBlock(BlockID, &NumWords))
return Error("Malformed block record");
const char *BlockName = 0;
if (Dump) {
errs() << Indent << "<";
if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
errs() << BlockName;
else
errs() << "UnknownBlock" << BlockID;
if (NonSymbolic && BlockName)
errs() << " BlockID=" << BlockID;
errs() << " NumWords=" << NumWords
<< " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n";
}
SmallVector<uint64_t, 64> Record;
// Read all the records for this block.
while (1) {
if (Stream.AtEndOfStream())
return Error("Premature end of bitstream");
uint64_t RecordStartBit = Stream.GetCurrentBitNo();
// Read the code for this record.
unsigned AbbrevID = Stream.ReadCode();
switch (AbbrevID) {
case bitc::END_BLOCK: {
if (Stream.ReadBlockEnd())
return Error("Error at end of block");
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
if (Dump) {
errs() << Indent << "</";
if (BlockName)
errs() << BlockName << ">\n";
else
errs() << "UnknownBlock" << BlockID << ">\n";
}
return false;
}
case bitc::ENTER_SUBBLOCK: {
uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
if (ParseBlock(Stream, IndentLevel+1))
return true;
++BlockStats.NumSubBlocks;
uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
// Don't include subblock sizes in the size of this block.
BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
break;
}
case bitc::DEFINE_ABBREV:
Stream.ReadAbbrevRecord();
++BlockStats.NumAbbrevs;
break;
default:
Record.clear();
++BlockStats.NumRecords;
if (AbbrevID != bitc::UNABBREV_RECORD)
++BlockStats.NumAbbreviatedRecords;
const char *BlobStart = 0;
unsigned BlobLen = 0;
unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
// Increment the # occurrences of this code.
if (BlockStats.CodeFreq.size() <= Code)
BlockStats.CodeFreq.resize(Code+1);
BlockStats.CodeFreq[Code].NumInstances++;
BlockStats.CodeFreq[Code].TotalBits +=
Stream.GetCurrentBitNo()-RecordStartBit;
if (AbbrevID != bitc::UNABBREV_RECORD)
BlockStats.CodeFreq[Code].NumAbbrev++;
if (Dump) {
errs() << Indent << " <";
if (const char *CodeName =
GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
errs() << CodeName;
else
errs() << "UnknownCode" << Code;
if (NonSymbolic &&
GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
errs() << " codeid=" << Code;
if (AbbrevID != bitc::UNABBREV_RECORD)
errs() << " abbrevid=" << AbbrevID;
for (unsigned i = 0, e = Record.size(); i != e; ++i)
errs() << " op" << i << "=" << (int64_t)Record[i];
errs() << "/>";
if (BlobStart) {
errs() << " blob data = ";
bool BlobIsPrintable = true;
for (unsigned i = 0; i != BlobLen; ++i)
if (!isprint(BlobStart[i])) {
BlobIsPrintable = false;
break;
}
if (BlobIsPrintable)
errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
else
errs() << "unprintable, " << BlobLen << " bytes.";
}
errs() << "\n";
}
break;
}
}
}
