similar to: [LLVMdev] LLVM job opportunities in Champaign, IL

Wojtek Matyjewicz has written a simple DependenceAnalysis interface and sent email about it to llvmdev in June -- the message is attached. He said he wrote several tests behind that interface -- ZIV, strong SIV, Banerjee, and some form of the Delta test -- and two students in my Spring class added the Omega test. I have not reviewed his interface yet because I've been traveling

On Wednesday 20 August 2008 14:07, Vikram S. Adve wrote: > At Illinois, we are working on a parallelizing compiler but we're at > an extremely early stage. We too will need a dependence analysis > interface that can support fairly aggressive analysis, including > strong tests, direction vectors, perhaps distance vectors, and > dependence breaking conditions. We were going to

Hi, On Fri, 2008-08-29 at 09:24 -0700, Devang Patel wrote: [...] > - Put various tests, DeltaTest, in lib/Analysis folder. The > transformation pass does not need to see these details. I believe some low-level tests should actually not be implemented as a separate Analysis but placed into Support. For instance, DeltaTest would use GCD or other tests on a different set of indexes once

Wojtek, Please see David's message below. Have you or can you check in your code, perhaps as a project for now? That will allow us to start looking at it and perhaps collaborating on it. --Vikram Associate Professor, Computer Science University of Illinois at Urbana-Champaign http://llvm.org/~vadve On Aug 20, 2008, at 3:05 PM, David Greene wrote: > On Wednesday 20 August 2008

Hi, I tried the memory dependency analysis posted by Wojciech on the attached test case. The analysis had to fallback to conservatives answers sometimes, probably (but not sure) due to the existence of several select instructions that might prevent the analysis from correctly find the answer. In this specific test case, these selects are provably useless and I am trying to get rid of them

On Aug 29, 2008, at 10:15 AM, Matthieu Delahaye wrote: > Hi, > > On Fri, 2008-08-29 at 09:24 -0700, Devang Patel wrote: > [...] >> - Put various tests, DeltaTest, in lib/Analysis folder. The >> transformation pass does not need to see these details. > > > I believe some low-level tests should actually not be implemented as a > separate Analysis but placed into

Please apply directly using the forms or URL below, or contact Luiz if you have questions. --Vikram Begin forwarded message: > From: "Luiz DeRose" <ldr at cray.com> > Date: December 5, 2006 5:26:01 PM CST > To: <vadve at cs.uiuc.edu> > Subject: Compiler opportunities at Cray > > Hi Vikram, > > I am attaching PDF descriptions of the compiler

On Wed, 6 Dec 2006, Vikram S. Adve wrote: > Please apply directly using the forms or URL below, or contact Luiz if you > have questions. --Vikram Are these posting llvm related? If not, they are not appropriate for llvmdev. -Chris > Begin forwarded message: > >> From: "Luiz DeRose" <ldr at cray.com> >> Date: December 5, 2006 5:26:01 PM CST >>

On Wed, 2008-09-03 at 10:50 -0500, David Greene wrote: > On Friday 29 August 2008 12:15, Matthieu Delahaye wrote: > > > > - DataDependenceAnalysis will select various dependence tests based > > > on > > > user selection. We want a interface similar to AnalysisGroup used > > > by > > > Alias Analysis, but we also want to allow the possibility of

On Friday 29 August 2008 12:15, Matthieu Delahaye wrote: > > - DataDependenceAnalysis will select various dependence tests based > > on > > user selection. We want a interface similar to AnalysisGroup used > > by > > Alias Analysis, but we also want to allow the possibility of running > > multiple tests at the same time. > > That will probably be the

Hi, I am trying to understand what is or what should be the correct semantic of the function parameter attribute noalias. I found: http://zion.cs.uiuc.edu/bugs/show_bug.cgi?id=1373 and http://www.llvm.org/docs/LangRef.html#paramattrs from the first link: "The semantics of 'noalias' are that they "define a new object". Any pointer derived from it ("it" being

On Wednesday 03 September 2008 12:39, Matthieu Delahaye wrote: = > API: This is the matter of providing the possibilities to ask useful > questions, and providing useful answers. [in the pow of the passes that > are using the analysis]. > > The "textbook" version would be: give me the memory dependency(ies) > between these two instructions. With the possibility to

In the general case, I think you have to be conservative about this because programmers may deliberately want this kind of "wraparound" behavior, e.g., with periodic boundary conditions. But 99.9% of programs probably don't need that so it would be bad to penalize them for this corner case. In such a situation, I think you just have to support both choices, but choose the

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On Aug 22, 2008, at 9:34 AMPDT, Chris Lattner wrote: > > On Aug 22, 2008, at 9:30 AM, Vikram S. Adve wrote: > >> In the general case, I think you have to be conservative about this >> because programmers may deliberately want this kind of "wraparound" >> behavior, e.g., with periodic boundary conditions. But 99.9% of >> programs probably don't need

On Aug 22, 2008, at 9:30 AM, Vikram S. Adve wrote: > In the general case, I think you have to be conservative about this > because programmers may deliberately want this kind of "wraparound" > behavior, e.g., with periodic boundary conditions. But 99.9% of > programs probably don't need that so it would be bad to penalize them > for this corner case. In such a

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