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Changes to fix buffering that I forgot to commit with previous patch.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94222 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-22 21:16:10 +00:00
parent 965df54254
commit 14ca177beb
3 changed files with 18 additions and 8 deletions
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6
include/llvm/Support/raw_ostream.h
View File

@ -456,8 +456,10 @@ public:
explicit raw_svector_ostream(SmallVectorImpl<char> &O);
~raw_svector_ostream();
/// clear - Flush the stream and clear the underlying vector.
void clear();
/// resync - This is called when the SmallVector we're appending to is changed
/// outside of the raw_svector_ostream's control. It is only safe to do this
/// if the raw_svector_ostream has previously been flushed.
void resync();
/// str - Flushes the stream contents to the target vector and return a
/// StringRef for the vector contents.

7
lib/MC/MCAsmStreamer.cpp
View File

@ -136,6 +136,9 @@ void MCAsmStreamer::AddComment(const Twine &T) {
T.toVector(CommentToEmit);
// Each comment goes on its own line.
CommentToEmit.push_back('\n');
// Tell the comment stream that the vector changed underneath it.
CommentStream.resync();
}
void MCAsmStreamer::EmitCommentsAndEOL() {
@ -158,7 +161,9 @@ void MCAsmStreamer::EmitCommentsAndEOL() {
Comments = Comments.substr(Position+1);
} while (!Comments.empty());
CommentStream.clear();
CommentToEmit.clear();
// Tell the comment stream that the vector changed underneath it.
CommentStream.resync();
}

13
lib/Support/raw_ostream.cpp
View File

@ -562,11 +562,14 @@ raw_svector_ostream::~raw_svector_ostream() {
flush();
}
/// clear - Flush the stream and clear the underlying vector.
void raw_svector_ostream::clear() {
if (GetNumBytesInBuffer() == 0) flush();
OS.clear();
/// resync - This is called when the SmallVector we're appending to is changed
/// outside of the raw_svector_ostream's control. It is only safe to do this
/// if the raw_svector_ostream has previously been flushed.
void raw_svector_ostream::resync() {
assert(GetNumBytesInBuffer() == 0 && "Didn't flush before mutating vector");
if (OS.capacity() - OS.size() < 64)
OS.reserve(OS.capacity() * 2);
SetBuffer(OS.end(), OS.capacity() - OS.size());
}