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From "Mikhail Fursov" <mike.fur...@gmail.com>
Subject Re: [drvm][jit] ABCD does not eliminate upper bound check
Date Tue, 17 Apr 2007 05:34:16 GMT
On 4/17/07, Naveen Neelakantam <neelakan@uiuc.edu> wrote:
> But in general, other optimization passes can perform transformations
> that break important dataflow relationships between variables.  This
> sometimes makes it impossible for ABCD to prove that a particular
> bounds check is redundant (ABCD uses "constraints", which are derived
> from dataflow).
Naveen, if any of optimizations we have can break ABCD with Maxim's example,
it worth to be analyzed. I hope there are no such optimizations in JIT
today. If you know one we can proceed and check it: it may lead to
additional improvements in ABCD algorithm.

Mikhail Fursov

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