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Switch Twine::str() to use toVector(), which is now efficient.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79437 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-08-19 18:09:47 +00:00
parent 5d598aaf3d
commit b7be0e8afc
1 changed files with 4 additions and 14 deletions
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18
lib/Support/Twine.cpp
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@ -8,27 +8,17 @@
//===----------------------------------------------------------------------===//
#include "llvm/ADT/Twine.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
std::string Twine::str() const {
// FIXME: This should probably use the toVector implementation, once that is
// efficient.
std::string Res;
raw_string_ostream OS(Res);
print(OS);
OS.flush();
return Res;
SmallString<256> Vec;
toVector(Vec);
return std::string(Vec.begin(), Vec.end());
}
void Twine::toVector(SmallVectorImpl<char> &Out) const {
// FIXME: This is very inefficient, since we are creating a large raw_ostream
// buffer -- hitting malloc, which we were supposed to avoid -- all when we
// have this pretty little small vector available.
//
// The best way to fix this is to make raw_svector_ostream do the right thing
// and be efficient, by augmenting the base raw_ostream with the ability to
// have the buffer managed by a concrete implementation.
raw_svector_ostream OS(Out);
print(OS);
}