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add an option to not auto-process abbreviations in advance()

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llvm-svn: 172946
This commit is contained in:
Chris Lattner 2013-01-20 02:12:39 +00:00
parent 7af654510b
commit ffaa6ec19b
1 changed files with 11 additions and 4 deletions
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15
include/llvm/Bitcode/BitstreamReader.h
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@ -159,7 +159,6 @@ struct BitstreamEntry {
} }
}; };
/// BitstreamCursor - This represents a position within a bitcode file. There /// BitstreamCursor - This represents a position within a bitcode file. There
/// may be multiple independent cursors reading within one bitstream, each /// may be multiple independent cursors reading within one bitstream, each
/// maintaining their own local state. /// maintaining their own local state.
@ -271,7 +270,14 @@ public:
/// Flags that modify the behavior of advance(). /// Flags that modify the behavior of advance().
enum { enum {
AF_DontPopBlockAtEnd = 1 /// AF_DontPopBlockAtEnd - If this flag is used, the advance() method does
/// not automatically pop the block scope when the end of a block is
/// reached.
AF_DontPopBlockAtEnd = 1,
/// AF_DontAutoprocessAbbrevs - If this flag is used, abbrev entries are
/// returned just like normal records.
AF_DontAutoprocessAbbrevs = 2
}; };
/// advance - Advance the current bitstream, returning the next entry in the /// advance - Advance the current bitstream, returning the next entry in the
@ -289,7 +295,8 @@ public:
if (Code == bitc::ENTER_SUBBLOCK) if (Code == bitc::ENTER_SUBBLOCK)
return BitstreamEntry::getSubBlock(ReadSubBlockID()); return BitstreamEntry::getSubBlock(ReadSubBlockID());
if (Code == bitc::DEFINE_ABBREV) { if (Code == bitc::DEFINE_ABBREV &&
!(Flags & AF_DontAutoprocessAbbrevs)) {
// We read and accumulate abbrev's, the client can't do anything with // We read and accumulate abbrev's, the client can't do anything with
// them anyway. // them anyway.
ReadAbbrevRecord(); ReadAbbrevRecord();
@ -483,7 +490,7 @@ private:
BlockScope.pop_back(); BlockScope.pop_back();
} }
//===--------------------------------------------------------------------===// //===--------------------------------------------------------------------===//
// Record Processing // Record Processing
//===--------------------------------------------------------------------===// //===--------------------------------------------------------------------===//