similar to: [LLVMdev] a question about how to use LTO

I have gold from cvs, and llvm-gcc/llvm from svn. My platform is Ubuntu 9.04 x86_64. I've configured llvm-gcc with "--enable-multilib". When compiling the LTO example from http://llvm.org/docs/LinkTimeOptimization.html I have no problems with 64-bit compilation, but get the following with -m32. luked at node:~/tests/lto$ make USE32=1 llvm-gcc -m32 -c -o main.o main.c llvm-gcc

Hi, Himanshu. I once wrote an LLVM IR-based memory profiling pass. Basically, I followed the code for EdgeProfiling. The source code is enclosed here, which worked with LLVM 2.8. Hope it is helpful. MemoryProfiling.cpp---the instrumentation pass, which inserts profiling function calls into the original program MemoryProfiling.c---the profiling library containing the profiling calls

Hi folks, I've got an idea for something I may be able to do as a Link-Time- Optimization pass, but I can't seem to find how LTO gets used. My crude approach has been to compile LLVM for debugging, and then run gdb on llvm-ld with -O5 and two .bc files, trying to catch LTO in action. I've also scanned the compiled tools, and none of them appear to use the symbol

On 30 August 2010 12:43, Luke Dalessandro <luked at cs.rochester.edu> wrote: > I have gold from cvs, and llvm-gcc/llvm from svn. My platform is > Ubuntu 9.04 x86_64. I've configured llvm-gcc with "--enable-multilib". > > When compiling the LTO example from > http://llvm.org/docs/LinkTimeOptimization.html I have no problems with > 64-bit compilation, but get

John, it still doesn't work for me. I'm in upstate new york. And one of my friends in bay area couldn't see the webpage either. Xiaoming On Thu, Apr 19, 2012 at 8:27 PM, John Criswell <criswell at illinois.edu>wrote: > On 4/19/12 7:15 PM, xiaoming gu wrote: > > Hi, all. I find out that the doxygen website (http://llvm.org/docs/doxygen) > is not available now. Does

Hello guys, I am trying to know how clang generates AST from source code. But it is not clear for me how clang generates it. Can you tell me which class or function of clang is building/generating AST? I want to see the specific function or algorithm of clang which generates AST. Thanks in advance for your idea. On Thu, Sep 29, 2011 at 1:22 PM, Jim Grosbach <grosbach at apple.com> wrote:

Hi all, I was trying to use LTO facility of LLVM to reduce the footprint of Clang itself. I build the ld-gold  and LLVMgold.so as described at [1] and then set the environment as described too. However, had to add the path for plugin manually as Clang was not able pass it to ld automatically. Following is the setting I used before starting to build (small foot Clang. CXX=clang++ -flto

Hello, gcc-ar/gcc-nm/gcc-ranlib compared to ar/nm/ranlib provide an implicit --plugin argument, so that the former can work with LTO objects, even when the gcc-lto plugin is not in ${libdir}/bfd-plugins. Do llvm-ar, llvm-ranlib and llvm-nm also imply a --plugin argument, compared to ar/ranlib/nm concerning LTO? Also https://llvm.org/docs/LinkTimeOptimization.html does not say anything about

I guess I miss-interpreted the text in [2]. It talks about the optimizations are hindered if the compiler driver invokes link time optimizer "separately". I found that all files compiled are in bc format. Also in library archives, the embedded files were in bitcode format. So the gold linker and LLVMgold plugin are indeed working fine. However, there is still question over only 6% gain

Hello, What you're describing is basically the parsing and codegen portions of clang. I'd suggest reading through the code there and posting to clang-dev if you have any specific questions. The clang devs are more likely to see your questions there as not all of them also hang out here. Regards, Jim On Sep 28, 2011, at 8:28 PM, eyasu getahun <eya.get at gmail.com> wrote: >

On Apr 19, 2012, at 10:43 PM, xiaoming gu <xiaoming.gu at gmail.com> wrote: > Hi, all. I'm using void LoopBase::getExitBlocks (SmallVectorImpl< BlockT * > &ExitBlocks) const to get all > exit blocks for a loop. The problem I find with this API is that it returns repetitive basic blocks in certain > situations. Should repetitive basic blocks be removed? Users

> On May 17, 2016, at 1:33 AM, Shi, Steven via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hello, > Let me ask a LTO simple question again. For the llvm LTO example in the link:http://llvm.org/docs/LinkTimeOptimization.html <http://llvm.org/docs/LinkTimeOptimization.html>, I use below build commands to generate three different optimization level binary: -O0, -O1, -O2.

Hey guys, I have seen your interesting conversion. I am new for LLVM as well as clang compiler. I am going to use it now. it is quite difficult when someone starts it from scratch. But it is enjoyable and it is possible to familiarize with the environment by short time. Am gonna to use clang + llvm to generate AST from source code by using clang and to do high level transformation. Then I want to

On 4/19/12 7:15 PM, xiaoming gu wrote: > Hi, all. I find out that the doxygen website > (http://llvm.org/docs/doxygen) is not available now. Does anyone know > when it will be back? Thanks. It works for me. Is it working for you now? -- John T. > > Xiaoming > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at

Hi, all. I want to get the single bitcode file after link-time optimizations. After doing some searching, I get commands as follows: *llvm-gcc -O4 -c xxx.c -o xxx.o llvm-gcc xxx.o -use-gold-plugin -Wl,-debug -Wl,-plugin-opt=also-emit-llvm -lm -o xxx* But these command don't give me the wanted bitcode file. The used version of llvm is 2.7. Do you have any idea of this problem or any other

The patch file is a diff file generated by "svn diff". It is about other modifications such as adding some lines to make files to make the added .c and .cpp files compiled. You may apply the patch file to LLVM source code by using a "patch" command or make the changes manually by reading the patch file. Xiaoming On Wed, Sep 28, 2011 at 6:05 AM, Himanshu Shekhar

Hi, all. I'm using void LoopBase::getExitBlocks (SmallVectorImpl< BlockT * > &ExitBlocks) const to get all exit blocks for a loop. The problem I find with this API is that it returns repetitive basic blocks in certain situations. Should repetitive basic blocks be removed? I have an example to show the problem. Following is the source code and the CFG is enclosed. int main() { int

On 4/19/12 7:40 PM, xiaoming gu wrote: > John, it still doesn't work for me. I'm in upstate new york. And one > of my friends in bay area couldn't see the webpage either. Try http://llvm.org/doxygen. That's the link from the llvm.org main page. The docs subdirectory is probably undergoing change due to Daniel Dunbar's work. -- John T. -------------- next part

Hi, all. I find out that the doxygen website (http://llvm.org/docs/doxygen) is not available now. Does anyone know when it will be back? Thanks. Xiaoming -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20120419/558310e0/attachment.html>

Hey Xiaoming, Thanks for those source codes. Can you please explain what this llvm-memory-profiling.patch does ? Thanks, Himanshu On Wed, Sep 28, 2011 at 6:49 AM, xiaoming gu <xiaoming.gu at gmail.com> wrote: > Hi, Himanshu. I once wrote an LLVM IR-based memory profiling > pass. Basically, I followed the code for EdgeProfiling. The source code is > enclosed here, which worked