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Hi Ryan, I think that it would be difficult to back port the CostModel back to LLVM3.0 because it uses the new TargetTransformInfo analysis. I also wanted to mention that only _lowering_ passes (target-specific optimization passes) may use TTI and the cost model. Higher-level canonicalization passes should not use it. Thanks, Nadav On Feb 6, 2013, at 1:26 AM, ryan <stdstack at gmail.com> wrote: > Hi All, > I wanted to do some basic cost estimation of Instruction/BB....

Hi All, I wanted to do some basic cost estimation of Instruction/BB. There're CostModelAnalysis and CodeMetrics available in 3.1 and 3.2 releases. I've been using 3.0 for a while. I'm wondering whether similar analysis can be done in the old 3.0 release, e.g. back porting the implementation. Thank you! Best, Ryan -------------- next part -------------- An HTML attachment was

...st Regards, Ryan On Thu, Feb 7, 2013 at 10:45 AM, Nadav Rotem <nrotem at apple.com> wrote: > Hi Ryan, > > I think that it would be difficult to back port the CostModel back to > LLVM3.0 because it uses the new TargetTransformInfo analysis. I also > wanted to mention that only _lowering_ passes (target-specific optimization > passes) may use TTI and the cost model. Higher-level canonicalization > passes should not use it. > > Thanks, > Nadav > > On Feb 6, 2013, at 1:26 AM, ryan <stdstack at gmail.com> wrote: > > > Hi All, > > I wanted to do...