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I understand that we need to push the address to a register then branch using the register. But i am asking why there is a trampoline there such that a call to foo is first branched to an snippet and the snippet branches to the X86CompilationCallback. is this snippet necessary ? Thanks Xin On Tue, Feb 22, 2011 at 12:39 PM, Reid Kleckner <reid.kleckner at gmail.com>wrote: > The

I have a question on the LLVM JIT I did some brief memory reading one day and I found that a call to a non-library function is resolved by the X86CompilationCallback, but the X86CompilationCallback is reached through a trampoline. why can not the generated code jump to the X86CompilationCallback function directly ? 0x2b0a6a4d103b: mov $0x2b0a6a561010,%rax 0x2b0a6a4d1045:

The address of the callee may be more than 2 GB away in memory, which cannot be encoded as an immediate offset in the call instruction. So, the value is first materialized with a mov instruction which can encode the immediate and then jumped to through a register. Reid On Tue, Feb 22, 2011 at 12:03 PM, Xin Tong Utoronto <x.tong at utoronto.ca> wrote: > I have a question on the LLVM JIT

sounds like a good idea to me. but one of the current issues of back-patching in the LLVM is that the back-patching is not done atomically on some of the architectures, i.e. Intel x86. and this makes LLVM JIT not thread-safe in lazy compilation mode. what we need to make sure is that the "updating the resolution for a given symbol" you mentioned is done in an atomic fashion. also, how

Should not the 4.0.0 release be March _2017_ in the "Release Emails" section on http://llvm.org/ ? -Xin

Is there a way to limit outbound calls when feeding files to the outgoing directory in asterisk? I several thousand files i need to feed asterisk, hoping to copy it to the outgoing directory all at 1 time.

I would like to know the status of the autovectorization support in LLVM. does LLVM have a loop dependence analysis, does LLVM have a infrastructure for autovectorization ? etc. Kind Regards Xin Tong -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110624/3dc35318/attachment.html>

Hi All, I just started to learn compiling C codes for R usage, and got a problem when I was playing with my 'hello world' code. #include <R.h> #include <Rdefines.h> #include <Rmath.h> SEXP test( ) { double x; x=dnorm(1.0,0.0,1.0,1); printf(" x value is: %d \n",x); return(R_NilValue); } I got the result : x value is: -466460838 Could

Hi, I am trying to output a R data set for use in WinBugs, I used dput(list(x=rnorm(100),N=100),file="bug.dat") But I can't get the intended format: list(x=c(.......),N=100), instead, I got something like this (copied the first two lines): [00000000]???73?74?72?75??63?74?75?72??65?28?6C?69??73?74?28?78???? structure(list(x

I do not know too much about clang, is opencl publicly supported in clang ? how about cuda ? Thanks Xin

Hi I see when LLVM builds the CallGraph SCCs. a function calling through a function pointer is conservatively assumed to call internal and external functions. Therefore, it has an edges pointing to the externalnode2, ie. the externalnode representing outgoing calls from this module. does LLVM have any function pointer analysis capabilities in the mainline ? Thanks, -Trent

Dear all: I installed the rsync 2.5.4 in my two machine (192.168.1.30 and 192.168.1.120, both are AIX OS) to backup data each other. The software`s installation is ok, and I can copy local files. But when I try to backup data between two machines, there reports some errors: >./bin/rsync -avz 192.168.1.30::web ./backup-3000/ rsync: failed to connect to 192.168.1.30: Connection refused

How do you calculate T and P statistics (T- test) in R? Is there a package out there that can do these calculations? Best, Michael Tong Futures Associate Quantitative Research Services Franklin Templeton Investments, Inc. 600 Fifth Ave New York, NY 10020 (212) 632-4254 mtong@templeton.com Notice: All email and instant messages (including attachments) sent to or from Franklin Templeton

Hi Xin, Thank you for your reply! I have tried the 3 alias analyses you have mentioned on LLVM 3.5: 1) $ opt -globalsmodref-aa -aa-eval < xxx.bc > /dev/null (May-alias response 100%) 2) $ opt -tbaa -aa-eval < xxx.bc > /dev/null (May-alias response 100%) 3) $ opt -cfl-aa -aa-eval < xxx.bc> /dev/null (Unknown command line argument '-cfl-aa') It seems that they are not

but does it have default values ? Thanks Xin On Tue, Mar 13, 2012 at 5:19 AM, Che-Liang Chiou <clchiou at gmail.com> wrote: > You specify shader model, bit size and etc. arch-specified parameters > though -march, -mattr and -mcpu, but AFAIK, PTX backend does not use > the GPU thread/block/grid size information in optimization yet. > > On Mon, Mar 12, 2012 at 8:17 PM, Xin

On Thu, Jan 23, 2020 at 11:37 AM David Greene <greened at obbligato.org> wrote: > Hubert Tong <hubert.reinterpretcast at gmail.com> writes: > > >> I read this as the refresh being an entirely new GitHub PR. Is that > >> right? Normally I would expect the same PR to be used but the rebase > >> would cause a force-push of the branch which would update

On 29 March 2011 12:35, Xin Tong Utoronto <x.tong at utoronto.ca> wrote: > *Project Description:* > > * > * > > LLVM has gained much popularity in the programming languages and compiler > industry from the time it is developed. Lots of researchers have used LLVM > as frameworks for their researches and many languages have been ported to > LLVM IR and interpreted,

On Wed, Feb 12, 2014 at 10:32:03PM +0800, Hurricane Tong wrote: > I seem to run into some trouble. > I succeeded in building the source code of Xapian in ubuntu, > but when I write a demo c++ application > > [snip] > I can't get it built. > > > hurricanetong at hurricanetong-VirtualBox:~/workspace$ g++ -L/usr/local/lib -lxapian-1.3 BuildIndexDemo.cpp Hmmm,

Do any of you have an idea as to what the Compilation Time vs Execution Time looks like in LLVM JIT with most aggressive optimizations on. Is adaptive compilation going to bring any benefits to the LLVM JIT ? -- Kind Regards Xin Tong -------------- next part -------------- An HTML attachment was scrubbed... URL:

How do I submit my GSOC proposal to the llvmdev mailing list ? -- Kind Regards Xin Tong -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110328/4f068139/attachment.html>