[llvm-commits] [llvm] r146599 - in /llvm/trunk: lib/MC/MCParser/AsmParser.cpp test/MC/AsmParser/directive_incbin.s
clattner at apple.com
Wed Dec 14 15:47:55 PST 2011
On Dec 14, 2011, at 2:34 PM, Kevin Enderby wrote:
> Author: enderby
> Date: Wed Dec 14 16:34:45 2011
> New Revision: 146599
> URL: http://llvm.org/viewvc/llvm-project?rev=146599&view=rev
> Improve the implementation of .incbin directive by replacing a loop by using
> getStreamer().EmitBytes. Suggestion by Benjamin Kramer!
One more tweak:
> + // Pick up the bytes from the file and emit them.
> const char *BufferStart = SrcMgr.getMemoryBuffer(NewBuf)->getBufferStart();
> + size_t BufferSize = SrcMgr.getMemoryBuffer(NewBuf)->getBufferSize();
> + std::string Data(BufferStart, BufferSize);
> + getStreamer().EmitBytes(Data, DEFAULT_ADDRSPACE);
This makes a copy of the file into the std::string. You can just use:
which avoids the copy by passing with a StringRef (just a pointer into the existing buffer).
If we're going to have incbin, it might as well be fast ;-)
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