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Enable streaming of bitcode

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This CL delays reading of function bodies from initial parse until
materialization, allowing overlap of compilation with bitcode download.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149918 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Derek Schuff
2012-02-06 22:30:29 +00:00
parent 06d7e1b52b
commit 2ea93875b2
26 changed files with 748 additions and 163 deletions
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29
lib/Bitcode/Reader/BitcodeReader.h
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@ -126,8 +126,11 @@ class BitcodeReader : public GVMaterializer {
Module *TheModule;
MemoryBuffer *Buffer;
bool BufferOwned;
BitstreamReader StreamFile;
OwningPtr<BitstreamReader> StreamFile;
BitstreamCursor Stream;
DataStreamer *LazyStreamer;
uint64_t NextUnreadBit;
bool SeenValueSymbolTable;
const char *ErrorString;
@ -161,9 +164,10 @@ class BitcodeReader : public GVMaterializer {
// Map the bitcode's custom MDKind ID to the Module's MDKind ID.
DenseMap<unsigned, unsigned> MDKindMap;
// After the module header has been read, the FunctionsWithBodies list is
// reversed. This keeps track of whether we've done this yet.
bool HasReversedFunctionsWithBodies;
// Several operations happen after the module header has been read, but
// before function bodies are processed. This keeps track of whether
// we've done this yet.
bool SeenFirstFunctionBody;
/// DeferredFunctionInfo - When function bodies are initially scanned, this
/// map contains info about where to find deferred function body in the
@ -178,8 +182,13 @@ class BitcodeReader : public GVMaterializer {
public:
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
: Context(C), TheModule(0), Buffer(buffer), BufferOwned(false),
ErrorString(0), ValueList(C), MDValueList(C) {
HasReversedFunctionsWithBodies = false;
LazyStreamer(0), SeenValueSymbolTable(false), ErrorString(0),
ValueList(C), MDValueList(C), SeenFirstFunctionBody(false) {
}
explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
: Context(C), TheModule(0), Buffer(0), BufferOwned(false),
LazyStreamer(streamer), SeenValueSymbolTable(false), ErrorString(0),
ValueList(C), MDValueList(C), SeenFirstFunctionBody(false) {
}
~BitcodeReader() {
FreeState();
@ -258,7 +267,7 @@ private:
}
bool ParseModule();
bool ParseModule(bool Resume);
bool ParseAttributeBlock();
bool ParseTypeTable();
bool ParseTypeTableBody();
@ -267,11 +276,17 @@ private:
bool ParseConstants();
bool RememberAndSkipFunctionBody();
bool ParseFunctionBody(Function *F);
bool GlobalCleanup();
bool ResolveGlobalAndAliasInits();
bool ParseMetadata();
bool ParseMetadataAttachment();
bool ParseModuleTriple(std::string &Triple);
bool ParseUseLists();
bool InitStream();
bool InitStreamFromBuffer();
bool InitLazyStream();
bool FindFunctionInStream(Function *F,
DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator);
};
} // End llvm namespace