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add some helpers 

llvm-svn: 36580
This commit is contained in:
Chris Lattner 2007-04-29 21:49:05 +00:00
parent 3543caacd3
commit 84e376f669
2 changed files with 5 additions and 2 deletions
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5
llvm/include/llvm/Bitcode/BitstreamReader.h
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@ -79,6 +79,8 @@ public:
return (NextChar-FirstChar)*8 + (32-BitsInCurWord); return (NextChar-FirstChar)*8 + (32-BitsInCurWord);
} }
/// GetAbbrevIDWidth - Return the number of bits used to encode an abbrev #.
unsigned GetAbbrevIDWidth() const { return CurCodeSize; }
uint32_t Read(unsigned NumBits) { uint32_t Read(unsigned NumBits) {
// If the field is fully contained by CurWord, return it quickly. // If the field is fully contained by CurWord, return it quickly.
@ -205,7 +207,7 @@ public:
/// EnterSubBlock - Having read the ENTER_SUBBLOCK abbrevid, read and enter /// EnterSubBlock - Having read the ENTER_SUBBLOCK abbrevid, read and enter
/// the block, returning the BlockID of the block we just entered. /// the block, returning the BlockID of the block we just entered.
bool EnterSubBlock() { bool EnterSubBlock(unsigned *NumWordsP = 0) {
BlockScope.push_back(Block(CurCodeSize)); BlockScope.push_back(Block(CurCodeSize));
BlockScope.back().PrevAbbrevs.swap(CurAbbrevs); BlockScope.back().PrevAbbrevs.swap(CurAbbrevs);
@ -213,6 +215,7 @@ public:
CurCodeSize = ReadVBR(bitc::CodeLenWidth); CurCodeSize = ReadVBR(bitc::CodeLenWidth);
SkipToWord(); SkipToWord();
unsigned NumWords = Read(bitc::BlockSizeWidth); unsigned NumWords = Read(bitc::BlockSizeWidth);
if (NumWordsP) *NumWordsP = NumWords;
// Validate that this block is sane. // Validate that this block is sane.
if (CurCodeSize == 0 || AtEndOfStream() || NextChar+NumWords*4 > LastChar) if (CurCodeSize == 0 || AtEndOfStream() || NextChar+NumWords*4 > LastChar)

2
llvm/include/llvm/Bitcode/LLVMBitCodes.h
View File

@ -92,7 +92,7 @@ namespace bitc {
// The constants block (CONSTANTS_BLOCK_ID) describes emission for each // The constants block (CONSTANTS_BLOCK_ID) describes emission for each
// constant and maintains an implicit current type value. // constant and maintains an implicit current type value.
enum ConstantsSymtabCodes { enum ConstantsCodes {
CST_CODE_SETTYPE = 1, // SETTYPE: [typeid] CST_CODE_SETTYPE = 1, // SETTYPE: [typeid]
CST_CODE_NULL = 2, // NULL CST_CODE_NULL = 2, // NULL
CST_CODE_UNDEF = 3, // UNDEF CST_CODE_UNDEF = 3, // UNDEF