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On Sep 25, 2012, at 5:08 PM, Jan Voung <jvoung at chromium.org> wrote: > Hi all, > > I've been looking into how to make llvm bitcode files smaller. There is one simple change that appears to shrink linked bitcode files by about 15%. See this spreadsheet for some rough data: > > https://docs.google.com/spreadsheet/ccc?key=0AjRrJHQc4_bddEtJdjdIek5fMDdIdFFIZldZXzdWa0E

...looking into SLEB. Attached is an updated patch which toggles the change at the module level (done with option a), and uses signed VRBs for phis, - Jan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121001/72a138aa/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: relative_ids.patch4 Type: application/octet-stream Size: 36425 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121001/72a138aa/attachment.obj>

Hi all, I've been looking into how to make llvm bitcode files smaller. There is one simple change that appears to shrink linked bitcode files by about 15%. See this spreadsheet for some rough data: https://docs.google.com/spreadsheet/ccc?key=0AjRrJHQc4_bddEtJdjdIek5fMDdIdFFIZldZXzdWa0E The change is in how operand ids are encoded in bitcode files. Rather than use an "absolute