[PATCH] [ValueTracking] Consider the bounds of PTX special registers

[Hal Finkel]

----- Original Message -----
> From: "Mark Heffernan" <meheff at google.com>
> To: jingyue at google.com, "justin holewinski" <justin.holewinski at gmail.com>, eliben at google.com, meheff at google.com
> Cc: llvm-commits at cs.uiuc.edu
> Sent: Monday, June 16, 2014 2:08:29 PM
> Subject: Re: [PATCH] [ValueTracking] Consider the bounds of PTX special	registers
> 
> I should also mention that I encountered some long compilation times
> which are superlinear with the unroll count when experimenting with
> the pragma loop limit.  With the current limit (32K) on a simple
> loop the compilation time is ~7s.  Doubling the limit results in a
> compilation time of ~50s.  It seems to be beneath llvm::UnrollLoop
> -> FoldBlockIntoPredecessor -> llvm::ScalarEvolution::forgetLoop.

Can you please file a PR to track this issue?

Thanks,
Hal

> 
> http://reviews.llvm.org/D4150
> 
> 
> 
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-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory