similar to: [LLVMdev] Trying out Loop Vectorizer

On 31.12.2012, at 20:03, Michael Lam <michael.lam.sk at gmail.com> wrote: > Hi all, > > I am trying out the new loop vectorizer in LLVM 3.2. I wanted to see the effect of the pass in `opt` but I have no success. I used LLVM IR generated from C examples in http://blog.llvm.org/2012/12/new-loop-vectorizer.html#more and pass them to `opt -S -O3 -vectorize-loops example.ll`.

On Dec 31, 2012, at 11:57 AM, Benjamin Kramer <benny.kra at gmail.com> wrote: > I'm not entirely sure why this is the case, the target specific stuff for opt is still very new, but at the moment you have to explicitly set a triple for opt so it can access target-specific bits to estimate the cost of vectorization. I think that this is a good opportunity to discuss this topic. At

On 06/29/2012 01:06 AM, Siu Kwan Lam wrote: > Dear LLVM, > > I am a young developer who have just uploaded my first opensource > project based on LLVM. I would like to know what professionals think of > my project. > > I have started a JIT extension to Python called Pymothoa ( > http://code.google.com/p/pymothoa/). Unlike other similar projects, I > did not modify the

On 06/29/2012 02:47 AM, Tobias Grosser wrote: > On 06/29/2012 01:06 AM, Siu Kwan Lam wrote: >> Dear LLVM, >> >> I am a young developer who have just uploaded my first opensource >> project based on LLVM. I would like to know what professionals think of >> my project. >> >> I have started a JIT extension to Python called Pymothoa ( >>

Dear LLVM, I am a young developer who have just uploaded my first opensource project based on LLVM. I would like to know what professionals think of my project. I have started a JIT extension to Python called Pymothoa ( http://code.google.com/p/pymothoa/). Unlike other similar projects, I did not modify the interpreter. Pymothoa uses Python decorators to mark function for JIT compiling. It

Hi all, I am noticing a significant degradation in execution performance in loops with just one backedge than loops with two backedges. Unifying the backedges into one will also cause the slowdown. To replicate this problem, I used the C code in https://gist.github.com/sklam/11f11a410258ca191e6f263262a4ea65 and checked against clang-3.8 and clang-4.0 nightly. Depending on where I put the

Hi all, I have a question about the loop vectorizer. For the following code: void example1 (float a[], float b[], float c[], int n) { int i; for (i=0; i<n; i++){ a[i] = c[i]; } for (i=0; i<n; i++){ a[i] += b[i]; } } void example2 (float a[], float b[], float c[], int n) { int i; for (i=0; i<n; i++){ a[i] = b[i] + c[i]; } } The

On Mon, Dec 31, 2012 at 3:26 PM, Nadav Rotem <nrotem at apple.com> wrote: > > On Dec 31, 2012, at 11:57 AM, Benjamin Kramer <benny.kra at gmail.com> wrote: > > I'm not entirely sure why this is the case, the target specific stuff for > opt is still very new, but at the moment you have to explicitly set a > triple for opt so it can access target-specific bits to

On Jan 1, 2013, at 12:31 AM, Chandler Carruth <chandlerc at google.com> wrote: > On Mon, Dec 31, 2012 at 3:26 PM, Nadav Rotem <nrotem at apple.com> wrote: >> >> On Dec 31, 2012, at 11:57 AM, Benjamin Kramer <benny.kra at gmail.com> wrote: >> >>> I'm not entirely sure why this is the case, the target specific stuff for opt is still very new, but

The R poisson random generator rpois appears to have a bug for theta 10 or larger. The sample mean of the pseudo variates is too small: sample mean approx theta - 0.5. I use Version 1.1.1 (August 15, 2000) Of R on a Dell OptiPlex computer with the Windows XP Professional operating system. Has this bug been fixed in later versions? (I found another reported rpois bug, but it appears to be

----- Forwarded message from Yihua Philip Sheng <phsan@cs.siu.edu> ----- From: "Yihua Philip Sheng" <phsan@cs.siu.edu> Subject: Compiling error Date: Thu, 12 Dec 2002 11:49:45 -0600 To: <samba-binaries-admin@lists.samba.org> X-Mailer: Microsoft Outlook, Build 10.0.4024 X-Bogosity: No, tests=bogofilter, spamicity=0.000000, version=0.9.1.2 When I tried to compile the

Hi Nadav, I'm interested in knowing how you'll work up the ARM cost model and how easy it'd be to split the work. As far as I can see, LoopVectorizationCostModel is the class that does all the work, with assistance from the target transform info. Do you think that updating ARMTTI would be the best course of action now, and inspect the differences in the CostModel later? I also

I am new to R and I was wondering if I could ask a few questions. (I am running R on a Windows NT box.) 1. Is the random number generator in R the same as the one in S "Super-Duper")? 2. Is it possible to use dyn.load in the Windows version? 3. When is the next release of R coming out? Thanks a lot. Best, Francisco --

Hi Renato, > I'm interested in knowing how you'll work up the ARM cost model and how easy it'd be to split the work. Yes, I am starting to work on the ARM cost model and I would appreciate any help in the form of: advice, performance measurements, patches, etc. I tune the cost model by running the cost model analysis pass and I compare the output of the analysis to the output

I downloaded the rseptbeta.zip and exe.zip files for Windows (I'm running Win 95 4.00.950a) about three weeks ago and until now had been very impressed. Today the executable rsept.exe (dated 10/29/97) went strange. It would open a window and immediately close the window (I've seen this before when inadvertently trying to open certain non-windows applications within windows). Here is

Let me first tell you that you and your cohorts are doing a great service to the statistical community with R. I have been working with Rseptbeta under Win95 and I am very impressed with its capabilities. I thought I give you some feedback gained from my limited playing with R. Fritz Scholz fritz.scholz at boeing.com ============================================================= When

On Oct 13, 2013, at 2:35 PM, Bob Wilson <bob.wilson at apple.com> wrote: > On Oct 12, 2013, at 1:55 AM, Bill Wendling <isanbard at gmail.com> wrote: > >> CGContext :: >> >> A central repository for back-end objects. The back-end objects may change, so >> they should not be "cached" by individual passes. This is analogous to the >>

Hi, LLVM only support primitive type i32 and i64, no i48. The clang translate "C int type" to i32 too. My question is if a cpu is 48 bits register size, how to write the backend for 48 bits register architecture. Can someone help me with this problem? Jonathan -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, would it be possible to change the hist() function in future R Versions to accept a "plot=F" parameter (like hist() in S it should return a list with "breaks" and "counts" in this case). This change should be very simple. Albrecht ------------------------------------------------------------------------------- Albrecht Gebhardt email :

Hi, would it be possible to change the hist() function in future R Versions to accept a "plot=F" parameter (like hist() in S it should return a list with "breaks" and "counts" in this case). This change should be very simple. Albrecht ------------------------------------------------------------------------------- Albrecht Gebhardt email :