similar to: [LLVMdev] problem using LTO

On 21 July 2010 22:14, Reza Yazdani <ry.yazdani at gmail.com> wrote: > Hello, > > I down loaded "llvm-gcc4.2-2.7-x86_64-linux" and I built Spec2006 with it. > It is great and except for one benchmark the rest work fine. I want to build > them with LTO now. I followed the directions in > "http://llvm.org/docs/GoldPlugin.html" and built ar, nm-new, and

On Jul 22, 2010, at 4:18 PMPDT, Reza Yazdani wrote: > Hi, > > I ran Spec2006 with -O4. All integer benchmarks passed, but only 8 > out 17 of floating point benchmarks passed. Is this normal or I > made a mistake in my build? Hi Reza. Somebody on Linux should answer, but I don't think it's normal. You may have checked out the source at a moment when it had a bug

Hi, I ran Spec2006 with -O4. All integer benchmarks passed, but only 8 out 17 of floating point benchmarks passed. Is this normal or I made a mistake in my build? Reza -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100722/4c4a81a9/attachment.html>

Following is the list of fp benchmarks that fail. They all pass with -O3, but some fail with -O4. I did the test run. Thanks, Reza Estimated Estimated Base Base Base Peak Peak Peak Benchmarks Ref. Run Time Ratio Ref. Run Time Ratio -------------- ------ --------- ---------

Hi Reza, -O4 is the highest level of LLVM optimization that I know of. But, I don't know if it has been tried on Spec2006. IIRC, Dan Gohman has run Spec. tests with LLVM, so he can provide more info. - fariborz On Jul 19, 2010, at 6:06 PM, Reza Yazdani wrote: > Hi, > > What are the best options to compile Spec2006 with LLVM compilers to > get the best performance numbers

Hi, What are the best options to compile Spec2006 with LLVM compilers to get the best performance numbers on x86? Has anybody compared LLVM Spec2006 numbers with GCC 4.5 base? reza -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100719/40cf38a5/attachment.html>

Hi all, I got an error from the gold plugin example in the following link: http://llvm.org/docs/GoldPlugin.html#example1 Here is the error message: sangmin at sangmin-desktop:/tmp$ llvm-gcc -use-gold-plugin a.a b.o -o main /usr/bin/ld: error: a.a: no archive symbol table (run ranlib) /usr/bin/ld: /usr/lib/crt1.o:(.text+0x18): error: undefined reference to 'main' /usr/bin/ld: b.o: in

Hi, I fixed error by using different version of ld with LLVM 2.7. I used ld.gold that comes with Ubuntu 10.04. Here is the version info: sangmin at sangmin-desktop:/tmp$ ld -v GNU gold (GNU Binutils for Ubuntu 2.20.1-system.20100303) 1.9 My experience of gold plugin is as follows: LLVM 2.7 (with libLLVMgold.so) + ld 2.20.1 (from Ubuntu 10.04) : O LLVM 2.7 (with libLLVMgold.so) + ld 2.21.51

Hi all, Following the example from http://llvm.org/docs/GoldPlugin.html#example1 gives the following error on Ubuntu Karmic: /usr/bin/ld: error: a.a: no archive symbol table (run ranlib) /usr/bin/ld: /usr/lib/crt1.o:../sysdeps/i386/elf/start.S:115: error: undefined reference to 'main' /usr/bin/ld: b.o: in function foo1:b.c(.text+0x4): error: undefined reference to 'foo2'

On 5 April 2010 10:24, Victor Zverovich <victor.zverovich at googlemail.com> wrote: > Hi all, > Following the example > from http://llvm.org/docs/GoldPlugin.html#example1 gives the following error > on Ubuntu Karmic: > /usr/bin/ld: error: a.a: no archive symbol table (run ranlib) > /usr/bin/ld: /usr/lib/crt1.o:../sysdeps/i386/elf/start.S:115: error: > undefined reference

On 11-03-21 10:35 PM, Sangmin Park wrote: > Hi, > > I fixed error by using different version of ld with LLVM 2.7. > I used ld.gold that comes with Ubuntu 10.04. > Here is the version info: > > sangmin at sangmin-desktop:/tmp$ ld -v > GNU gold (GNU Binutils for Ubuntu 2.20.1-system.20100303) 1.9 > > My experience of gold plugin is as follows: > > LLVM 2.7 (with

For some time now the gold linker has support for plugins and llvm has a plugin for it. Unfortunately, it was still not possible to do fully transparent LTO on linux because ar had no support for plugins and a library created with llvm files in it would have no symbol table and would be rejected by gold. Today support for plugins has been committed to BFD. That is the file format abstraction

On May 26, 2009, at 10:52 AM, Rafael Espindola wrote: > Today support for plugins has been committed to BFD. That is the file > format abstraction library used by binutils. This now works Very nice Rafael! Can you please update the web page to mention this, e.g. in the LinkTimeOptimization.html document and wherever else relevant? -Chris > > $ llvm-gcc -emit-llvm -O2 -c a.c

433.milc, 447.deall, and 450.soplex are run as part of the nightly tests on Darwin (=MacOSX) in a way that closely approximates -O4. They are working there. I am inclined to suspect gold given that they work at -O3. Can a Linux person comment? On Jul 23, 2010, at 10:19 AMPDT, Reza Yazdani wrote: > Following is the list of fp benchmarks that fail. They all pass with > -O3, but

Hi there, I checked out the latest code from the repository, and wanna use the gold plugin, but I got the following: libLLVMgold.so: could not load plugin library Do you know why this is happening? Also I noticed the name of the library is changed to LLVMgold.so, and I just renamed it to libLLVMgold.so when I copied it. Is this the right thing to do? Thanks, Guoliang

On 6/25/2010 8:56 AM, Rafael Espindola wrote: > On 25 June 2010 03:17, Guoliang Jin<jingl1345 at gmail.com> wrote: >> Hi there, >> >> I checked out the latest code from the repository, and wanna use the gold >> plugin, but I got the following: >> >> libLLVMgold.so: could not load plugin library >> >> Do you know why this is happening?

On 25 June 2010 03:17, Guoliang Jin <jingl1345 at gmail.com> wrote: >  Hi there, > > I checked out the latest code from the repository, and wanna use the gold > plugin, but I got the following: > > libLLVMgold.so: could not load plugin library > > Do you know why this is happening? > > Also I noticed the name of the library is changed to LLVMgold.so, and I just

On Tue, Mar 22, 2011 at 9:19 AM, Rafael Avila de Espindola < rafael.espindola at gmail.com> wrote: > On 11-03-21 10:35 PM, Sangmin Park wrote: > > Hi, > > > > I fixed error by using different version of ld with LLVM 2.7. > > I used ld.gold that comes with Ubuntu 10.04. > > Here is the version info: > > > > sangmin at sangmin-desktop:/tmp$ ld -v

Hi,all I'm using ubuntu8.04 and I'm installing gold-plugin along with the document of that, After I built the binutils and LLVM with plugin enabling,and I also replace ld with ld-new which supports plugin,I tried to compile a hello world program by this: llvm-gcc -use-gold-plugin a.a b.o -o hello which is similar with the example in the document,it tells me that libLLVMgold.so can not

> So when I copy it to $PREFIX/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/ and > $PREFIX/lib/bfd-plugins/, should I rename it to libLLVMgold.so? Any other > copies I should make? The copy in that directory can have any name you like. BFD will try all. Note that that is the copy that nm and ar will use. The linker (gold) requires you to pass -plugin to it. >> >> Copying it