search for: 07294d3c

On 26 September 2012 01:08, Jan Voung <jvoung at chromium.org> wrote: > - Forward references will create negative-valued ids (which end up being > written out as large 32-bit integers, as far as I could tell). Can you use an SLEB-like representation? It's probably not going to be backwards compatible, but if there isn't an SLEB/ULEB representation in bitcode, I'd say

...t the default N is 6 bits, but I haven't tried tweaking these parameters. > -- > cheers, > --renato > > http://systemcall.org/ > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20120926/07294d3c/attachment.html>

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