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[serialization] Write a BLOCKINFO block so llvm-bcanalyzer is useful.

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This adds names to the other blocks and records in the file.

The tests now require llvm-bcanalyzer to run; please build that along
with 'FileCheck' and 'not'.

Swift SVN r5109
This commit is contained in:
Jordan Rose
2013-05-09 00:19:10 +00:00
parent 476c4d4f48
commit 5be5607a0f
3 changed files with 75 additions and 7 deletions
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55
lib/Serialization/Serialization.cpp
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@@ -35,7 +35,11 @@ namespace {
/// A reusable buffer for emitting records.
SmallVector<uint64_t, 64> ScratchRecord;
/// Writes the Swift module file header and BLOCKINFO block.
/// Writes the BLOCKINFO block.
void writeBlockInfoBlock();
/// Writes the Swift module file header, BLOCKINFO block, and
/// non-TU-specific metadata.
void writeHeader();
/// Writes the input file paths.
@@ -53,6 +57,51 @@ namespace {
};
} // end anonymous namespace
/// Record the name of a block.
static void emitBlockID(llvm::BitstreamWriter &out, unsigned ID,
StringRef name,
SmallVectorImpl<unsigned char> &nameBuffer) {
SmallVector<unsigned, 1> idBuffer;
idBuffer.push_back(ID);
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, idBuffer);
// Emit the block name if present.
if (name.empty())
return;
nameBuffer.resize(name.size());
memcpy(nameBuffer.data(), name.data(), name.size());
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, nameBuffer);
}
/// Record the name of a record within a block.
static void emitRecordID(llvm::BitstreamWriter &out, unsigned ID,
StringRef name,
SmallVectorImpl<unsigned char> &nameBuffer) {
assert(ID < 256 && "can't fit record ID in next to name");
nameBuffer.resize(name.size()+1);
nameBuffer[0] = ID;
memcpy(nameBuffer.data()+1, name.data(), name.size());
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, nameBuffer);
}
void Serializer::writeBlockInfoBlock() {
BCBlockRAII restoreBlock(Out, llvm::bitc::BLOCKINFO_BLOCK_ID, 2);
SmallVector<unsigned char, 64> nameBuffer;
#define BLOCK(X) emitBlockID(Out, X ## _ID, #X, nameBuffer)
#define RECORD(X) emitRecordID(Out, X, #X, nameBuffer)
BLOCK(CONTROL_BLOCK);
RECORD(METADATA);
BLOCK(INPUT_BLOCK);
RECORD(SOURCE_FILE);
#undef BLOCK
#undef RECORD
}
void Serializer::writeHeader() {
// Swift module file type: 'SMod'.
Out.Emit((unsigned)'S', 8);
@@ -60,9 +109,7 @@ void Serializer::writeHeader() {
Out.Emit((unsigned)'o', 8);
Out.Emit((unsigned)'d', 8);
{
BCBlockRAII restoreBlock(Out, llvm::bitc::BLOCKINFO_BLOCK_ID, 2);
}
writeBlockInfoBlock();
{
BCBlockRAII restoreBlock(Out, CONTROL_BLOCK_ID, 3);