[llvm-commits] [llvm] r167324 - in /llvm/trunk: include/llvm/Analysis/Passes.h include/llvm/InitializePasses.h include/llvm/LinkAllPasses.h lib/Analysis/Analysis.cpp lib/Analysis/CMakeLists.txt lib/Analysis/CostModel.cpp test/Analysis/CostModel/

[Nadav Rotem]

Sounds good.  Thanks.

On Nov 5, 2012, at 3:33 AM, Chandler Carruth <chandlerc at google.com> wrote:

> FWIW, I've hacked on users of code metrics a lot, and when the cost
> model starts to be more fleshed out, I'll be happy to chat about use
> cases. Until then, I suspect you have plenty of use cases to motivate
> it, and it's better to stay focused on that.
> 
> On Fri, Nov 2, 2012 at 4:39 PM, Nadav Rotem <nrotem at apple.com> wrote:
>> Code metrics runs on a function or a basic block and collects statics such as the number of dynamic allocas, or the number of vector instructions.  The Cost Model class attempts to estimate the execution cost. The only overlap that I see is that CodeMetrics has API for checking if a given instruction is free.
>> 
>> On Nov 2, 2012, at 4:35 PM, Eli Friedman <eli.friedman at gmail.com> wrote:
>> 
>>> On Fri, Nov 2, 2012 at 2:48 PM, Nadav Rotem <nrotem at apple.com> wrote:
>>>> Author: nadav
>>>> Date: Fri Nov  2 16:48:17 2012
>>>> New Revision: 167324
>>>> 
>>>> URL: http://llvm.org/viewvc/llvm-project?rev=167324&view=rev
>>>> Log:
>>>> Add a cost model analysis that allows us to estimate the cost of IR-level instructions.
>>>> 
>>>> Added:
>>>>   llvm/trunk/lib/Analysis/CostModel.cpp
>>>>   llvm/trunk/test/Analysis/CostModel/
>>>>   llvm/trunk/test/Analysis/CostModel/X86/
>>>>   llvm/trunk/test/Analysis/CostModel/X86/lit.local.cfg
>>>>   llvm/trunk/test/Analysis/CostModel/X86/tiny.ll
>>>>   llvm/trunk/test/Analysis/CostModel/X86/vectorized-loop.ll
>>>>   llvm/trunk/test/Analysis/CostModel/lit.local.cfg
>>>>   llvm/trunk/test/Analysis/CostModel/no_info.ll
>>>> Modified:
>>>>   llvm/trunk/include/llvm/Analysis/Passes.h
>>>>   llvm/trunk/include/llvm/InitializePasses.h
>>>>   llvm/trunk/include/llvm/LinkAllPasses.h
>>>>   llvm/trunk/lib/Analysis/Analysis.cpp
>>>>   llvm/trunk/lib/Analysis/CMakeLists.txt
>>> 
>>> How is this new pass related to the utilities in llvm/Analysis/CodeMetrics.h ?
>>> 
>>> -Eli
>> 
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