- previously formatted_raw_ostream tracked columns, now it tracks lines too
- used by (upcoming) DebugIR pass to know the line number to connect to each IR
instruction
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- The current_pos function is supposed to return all the written bytes, not the
current position of the underlying stream.
- This caused tell() to be broken whenever the underlying stream had buffered
content.
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of a base class.
This makes it possible to unregister the file from FilesToRemove when
the file is done. Also, this eliminates the need for
formatted_tool_output_file.
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functionality that most command-line tools need: ensuring that the
output file gets deleted if the tool is interrupted or encounters an
error.
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it changes raw_fd_ostream::preferred_buffer_size to return zero on
a scary stat failure instead of setting the stream to an error state.
This method really should not mutate the stream.
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buffer", while we work out a solution.
Dan convinced me that making debugging annoying for him is worse than 10x being
slower for me. :)
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is.
- The problem is that formatted_ostream forces its underlying buffer to be
unbuffered, so if some client happens to wrap a formatted_ostream around
something, but still use the underlying stream, then we can end up writing on
a fully unbuffered output (which was never intended to be unbuffered).
- This makes clang (and presumably llvm-gcc) -emit-llvm -S a mere 10x faster.
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- Kill off begin(), end(), and iterator. It isn't clear what these
mean. Instead provide getBufferStart(), which can be used with
GetNumBytesInBuffer to the same effect.
- Update ComputeColumn to take arguments for the buffer to scan, this
simplifies the implementation of write_impl substantially.
- This should also fix possible problems with the scanning pointer pointing
outside of the current raw_ostream buffer.
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means that two separate raw_ostreams are doing buffering before data is
sent to the underlying stream. Besides the inefficiency of redundant
buffering, the second level of buffering doesn't recieve flush()
requests.
Fix this by having formatted_raw_ostream set the underlying raw_ostream
to be unbuffered. This eliminates inefficiency due to redundant buffering,
and it makes the flush() disconnect harmless.
This fixes PR4559.
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hooks as they're no longer needed.
The major change with this patch is to make formatted_raw_ostream usable
by any client of raw_ostream.
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