similar to: [LLVMdev] Instruction Prefetching in llvm

On Wed, Dec 12, 2012 at 07:09:45PM -0500, aasheesh kolli wrote: > HI, > > Has anyone ever implemented instruction prefetching with llvm? If so, on which > architectures? Grep prefetch in lib/Target/* will show you ARM, X86, and PPC seems have implemented prefetch instruction. LLVM provides prefetch intrinsic [1] so that you can insert it in LLVM IR as a hint to code generator. I

Hi Justin, I believe the PTX section in the link below need some love, updating "lib/Target/PTX" to "lib/Target/NVPTX" for example. Would you like to take a look? http://llvm.org/docs/CodeGenerator.html#the-ptx-backend Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667

Hi all, I think it's Gentoo's bug, but I want to know if anyone has the same issue here. I am compiling LLVM trunk on Gentoo (gcc 4.5.2), and I get error message below, --- make[4]: Entering directory `/nfs_home/chenwj/llvm-3.1/svn/build/tools/clang/lib/Frontend' llvm[4]: Compiling InitHeaderSearch.cpp for Release+Asserts build

> In consideration of those codes in XXXAsmPrinter class which print out > MachineInstr in .s format, I tend to think they are old codes that > might be obsolete and will be replaced with MC layer implementation, > but I am not sure. How about sending a patch which remove those obsolete code, and let others give comment? Cheers, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab,

Hi Pawel, PTX already be replaced with NVPTX. However, PTX subdirectory still sit in lib/Target in 3.2 release. Do you think update the release tarball is a good idea? Also could you remove it from the trunk? Thanks. Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage:

On Mon, Nov 07, 2011 at 04:10:29PM +0100, Wim Vander Schelden wrote: > I'm having the same problem. Does anyone know what's causing this? > > Kind regards, > > Wim What's your profiling procedure? I can only guess llvm-prof does not recognize the profiling data. Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia

Hi all, While building/testing LLVM/Clang on ARM, I often have problems that are undocumented on the website. I would like to contribute my experience if possible so that others can benefit from it. If this is a good idea, I am wondering on what page I should write it down, [1] or [2]? Regards, chenwj [1] http://llvm.org/docs/GettingStarted.html [2] http://llvm.org/docs/FAQ.html -- Wei-Ren

Hi all, I have some troubles in writing XXInstFormat.td for my little backend. I don't know how should I start writing up this file. Is there any general rule? Thanks. Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: http://people.cs.nctu.edu.tw/~chenwj

Thx all for the quick answers... > De : llvmdev-bounces at cs.uiuc.edu [llvmdev-bounces at cs.uiuc.edu] de la part de Arnaud ALLARD DE GRANDMAISON [arnaud.allarddegrandmaison at parrot.com] > > Hi, > > Depending on what have run before your pass, the loop may have been unrolled or simplified if the computation inside the loop is too simple. > > Cheers, > -- > Arnaud de

Hi 陳韋任, Sorry for the late response. On Apr 21, 2012, at 8:03 PM, 陳韋任 wrote: > I have a native compile and the result seems better... You can compare > the result of cross compile [1] and the native compile [2]. > > Any though? > I'm not particularly happy about the failures here. We need to get to the bottom of them. In the previous email, you tried setting CFLAGS and

> De : 陳韋任 [chenwj at iis.sinica.edu.tw] > Date d'envoi : mardi 8 mai 2012 11:37 > À : Rinaldini Julien > Cc: LLVM Developers Mailing List > Objet : Re: [LLVMdev] RE : svn trunk comilation error > > Hi Rinaldini, > > You probably need to illustrate what your enviroment is, what revision you > checkout and how you build LLVM. I have no problem build LLVM svn here.

> still a question: > what does "; PR1028" means? I believe it means this test case addresses bug report (pr, problem report) 1028 [1]. In other words, this test case guarantee that pr1028 will not back again. If so, it will fail. Regards, chenwj [1] http://llvm.org/bugs/show_bug.cgi?id=1028 -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science,

Hello all, I caught a problem related to pthread library. I built llvm and llvm-gcc then compiling a multithreaded benchmark written in POSIX thread library. The command "llvm-gcc -o bench bench.c -lpthread" ran well while "llvm-gcc -c bench; llvm-ld -o bench bench.o -lpthread" crashed. It told that "llvm-ld: error: Cannot find library 'pthread'". I could

On 24 April 2011 00:57, 陳韋任 <chenwj at iis.sinica.edu.tw> wrote: > Hi, Zhao > > You can apply the attachment to LLVM 2.9 Release. It has been tested > on FreeBSD/x86. > Hi Chen, may I commit this (updated to include GCDAProfiling.cpp) to LLVM SVN? Nick > > Regards, > chenwj > > -- > Wei-Ren Chen (陳韋任) > Computer Systems Lab, Institute of Information

Thanks for your help and patience! Best regards, Zhen Kai At 2012-04-16 15:35:25,"陳韋任" <chenwj at iis.sinica.edu.tw> wrote: >> The thing is that I know the Makefile to complete that task. But what I want to know the clang command that can do that. Since the makefile will generate a .ko file while I can use the clang command "-O3-emit-llvm" to generate a

> 2.i want to write such a test:translate a *.ll(i.e:hello.ll) file to a > *.c file(i.e:hello.c) with llc,then verify if the .c file contian a > certain string(i.e:"abc:). so: It seems you want to test LLVM C backend, go looking for llvm-3.0.src/test/CodeGen/CBackend/* (C backend had been removed from LLVM 3.1). HTH, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute

Hi! I was trying to run an already build LLVM-pass ( the Hello world ) on Visual Studio. I could locate the The Hello world pass sources in llvm/lib/Transform/Hello/*.But when I compiled llvm using the command "cmake -G "Visual Studio 10" ..\llvm" , I couldn't find the LLVMHello.so file in "build_directory/Debug/lib/LLVMHello.so" neither in

On Thu, Feb 07, 2013 at 11:09:10AM +0100, Óscar Fuentes wrote: > Blind Faith <person.of.book at gmail.com> writes: > > > I used the LLVM demo page http://llvm.org/demo/ to generate C++ code for > > generating LLVM IR code. But that page is now disabled. Is there any tool > > or other site which does what I'm trying to do, that is I give "C/C++ code"

Hi, Sorry I did not precise that, but I'm already doing that... I have, as you say, two different director, one for source and one for build (where I run my configure)... Cheers ________________________________________ De : 陳韋任 [chenwj at iis.sinica.edu.tw] Date d'envoi : mardi 8 mai 2012 05:21 À : Rinaldini Julien Cc: LLVM Developers Mailing List Objet : Re: [LLVMdev] svn trunk

Hello, Thank you very much for the pointers. I am are able to create new MDNodes, filled with some constants, and attach them to llvm instructions. However, the metadata map is not getting updated as expected. For example, instead of the expected new entry !n = metadata !{some values} we are getting !n = metadata !{null} Do you know what might be wrong? Do we need to enter the MDNodes into the