[llvm-commits] Avoid O(#registers*#basicblocks) memory use in LiveVariables

Jeffrey Yasskin jyasskin at google.com
Sat May 23 17:04:54 PDT 2009

On Sat, May 23, 2009 at 9:24 AM, Jeffrey Yasskin <jyasskin at google.com> wrote:
> On Fri, May 22, 2009 at 5:10 PM, Evan Cheng <evan.cheng at apple.com> wrote:
>> I can see the potential for both of those issues. Perhaps you can
>> specialize SparseBitVector with a smaller element size to reduce
>> memory usage? As for compile time cost, can you measure it by return
>> through the llvm test suite?
> I've attached the results of `make TEST=nightly report.html
> ENABLE_OPTIMIZED=1 DISABLE_ASSERTIONS=1` from before and after my
> patch.

Here are new versions of the nightly report. The LLC compile time was
broken until Nick fixed it, and, of course, it's the column we care
about here.
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