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Read 64 bits at a time in the bitcode reader.

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The reading of 64 bit values could still be optimized, but at least this cuts
down on the number of virtual calls to fetch more data.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221865 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-11-13 07:23:22 +00:00
parent 551319dda5
commit 509156a4ab
3 changed files with 17 additions and 20 deletions
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12
include/llvm/Support/StreamingMemoryObject.h
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@ -71,14 +71,10 @@ private:
size_t bytes = Streamer->GetBytes(&Bytes[BytesRead + BytesSkipped],
kChunkSize);
BytesRead += bytes;
if (bytes < kChunkSize) {
assert((!ObjectSize || BytesRead >= Pos) &&
"Unexpected short read fetching bitcode");
if (BytesRead <= Pos) { // reached EOF/ran out of bytes
ObjectSize = BytesRead;
EOFReached = true;
return false;
}
if (BytesRead <= Pos) { // reached EOF/ran out of bytes
ObjectSize = BytesRead;
EOFReached = true;
return false;
}
}
return true;