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-rw-r--r--lib/Support/raw_ostream.cpp13
1 files changed, 8 insertions, 5 deletions
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 7cd16c8..10d7ec0 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -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());
}