similar to: [LLVMdev] Passing an option to opt through clang/dragonegg

Try -mllvm -disable-unroll-scev if you're curious. There can be some luck involved. If you have the bitcode for the important function, I may be able to convert it into a test case to avoid regressing. I usually grab the unoptimized bitcode as follows: -emit-llvm -mllvm -disable-llvm-optzns -o module.bc -Andy On Sep 6, 2011, at 12:03 PM, Owen Anderson wrote: > Seems very likely to be

Hi, My brother (Tarun) and I have been attempting to get dragonegg working with gcc-5 and llvm-3.6. So far we have had some success and most of the compilator and validator tests of dragonegg pass. However the following validator tests fail and we don't understand why. The Validator :: c++/2007-01-06-ELF-Thunk-Sections.cpp The Validator :: c/ExternFunctionWeakref.c The Validator

On 03/04/2012 02:32 PM, Harel Cain wrote: > Thanks, but I'm not sure I understand. I see no such flag in clang 2.9 > nor couldn't I find any mention of it. What does it do? It's called -mllvm. You can use it like this. clang -mllvm -vectorize ... Cheers Tobi

I have tried to invoke a transformation/optimization pass using -mllvm, without success. I might be missing something. For example I have a shared/dynamic library which contains LLVM passes. I used to invoke them with llvmc like this: >>*llvmc mycode.c -o mycode.o -c -opt -Wo,=-load,libFoo.dylib,-Foo* Can this style of optimization be executed using -mllvm argument? Thx, PMon On Sun,

Duncan, Is the documentation for using Polly support in dragonegg correct? I built llvm/polly/dragonegg using the documentation at http://polly.llvm.org/example_load_Polly_into_dragonegg.html with... GCC=/sw/lib/gcc4.7/bin/gcc-4 LLVM_CONFIG=/sw/opt/llvm-3.2/bin/llvm-config ENABLE_LLVM_PLUGINS=1 make CPPFLAGS="-DENABLE_LTO -I/sw/include" The resulting dragonegg plugin works fine

On 10/20/2012 05:38 PM, Jack Howarth wrote: > Duncan, > Is the documentation for using Polly support in dragonegg correct? I built llvm/polly/dragonegg > using the documentation at http://polly.llvm.org/example_load_Polly_into_dragonegg.html > with... > > GCC=/sw/lib/gcc4.7/bin/gcc-4 LLVM_CONFIG=/sw/opt/llvm-3.2/bin/llvm-config ENABLE_LLVM_PLUGINS=1 make

Seems very likely to be related to Andy's SCEV-unroll-loops changes. --Owen On Sep 6, 2011, at 11:56 AM, Jack Howarth wrote: > I'm not certain yet which commit in the last couple of days caused this, > but the current llvm/dragonegg svn shows a major improvement in the runtime > of the xplor-nih testsuite when xplor-nih is built with FSF gcc 4.6.1 and the > dragonegg plugin

I'm not certain yet which commit in the last couple of days caused this, but the current llvm/dragonegg svn shows a major improvement in the runtime of the xplor-nih testsuite when xplor-nih is built with FSF gcc 4.6.1 and the dragonegg plugin at -O3 -ffast-math -funroll-loops. Previously the xplor-nih testsuite always executed in ~40 sec but now it is coming it at 34.5 sec which is about the

Hi Shahzad, > Is it possible that we can use LLVM optimization beside O1, O2, O3 > along with dragonegg plugin? sure, try this: gcc -fplugin=path/dragonegg.so ...other_options_here... -S -o - -fplugin-arg-dragonegg-emit-ir -fplugin-arg-dragonegg-llvm-ir-optimize=0 | opt -pass1 -pass2 ... Here -fplugin-arg-dragonegg-emit-ir tells it to output LLVM IR rather than target assembler.

Hello Duncan I tried your method and it works fine. What would be the next step to produce the final executable? I have tried the following but it is producing an error $ gcc -fplugin=/path/to/dragonegg.so -S *.c -fplugin-arg-dragonegg-emit-ir | opt -adce $ clang *.s Regards Shahzad On Fri, Jun 8, 2012 at 9:10 AM, Duncan Sands <baldrick at free.fr> wrote: > Hi Shahzad, > >

Hi Shahzad, > I tried your method and it works fine. What would be the next step to > produce the final executable? I have tried the following but it is > producing an error > > $ gcc -fplugin=/path/to/dragonegg.so -S *.c > -fplugin-arg-dragonegg-emit-ir | opt -adce this won't work because you aren't passing the IR to opt (you need -o - for that if using a pipe) and you

Hello Duncan On Fri, Jun 8, 2012 at 2:58 PM, Duncan Sands <baldrick at free.fr> wrote: > Hi Shahzad, > > >> I tried your method and it works fine. What would be the next step to >> produce the final executable? I have tried the following but it is >> producing an error >> >> $ gcc -fplugin=/path/to/dragonegg.so -S *.c >>

Thanks, but I'm not sure I understand. I see no such flag in clang 2.9 nor couldn't I find any mention of it. What does it do? Harel Cain On Sun, Mar 4, 2012 at 15:03, Anton Korobeynikov <anton at korobeynikov.info>wrote: > > In the good old llvmc, the -Wo flag could be used to pass arguments to > the > > optimizer. Is there a similar mechanism anywhere for clang?

//mllvm Options can be dumped by clang -v -help -mllvm and clang -v --help-hidden --> //mllvm Options can be dumped by clang -v -help -mllvm and clang -v --help-hidden -mllvm On Tue, Jan 9, 2018 at 3:09 AM, toddy wang <wenwangtoddy at gmail.com> wrote: > Thanks, Craig. > > So, clang -Xclang -disable-llvm-passes actually disables all the LLVM > passed populated by clang so

Hi, > I tried it with -o - but its producing an error > > gcc: fatal error: cannot specify -o with -c, -S or -E with multiple files > > What you suggest? what I wrote: >> for F in *.c ; do B=`basename $F .c` ; gcc -fplugin=/path/to/dragonegg.so >> -S -o - $F -fplugin-arg-dragonegg-emit-ir | opt -adce -o $B.ll ; done >> clang *.ll Thanks to the for loop and

Hello Duncan Is it possible that we can use LLVM optimization beside O1, O2, O3 along with dragonegg plugin? Regards Shahzad On Thu, Jun 7, 2012 at 10:59 PM, Abdul Wahid Memon <engrwahidmemon at gmail.com> wrote: > Thanks alot Chad for these quick and fine responses. > > Regards > > Abdul > > On Thu, Jun 7, 2012 at 10:57 PM, Chad Rosier <mcrosier at apple.com>

Hello Duncan Sorry for the mistake. Actually that error occurred when I was compiling all the files at once, NOT in for loop. The for loop is working perfectly as it is dealing with individual files. I have now one new issue. Let me specify it briefly. If I compile the program using the following command line i.e. $ clang -O3 -lm *.c then $ time ./a.out real 0m2.606s user 0m2.584s sys

Hi, Is there a way to passing llc options to clang, for example -march -mcpu, etc. ? Some threads suggested using -mllvm flag, I tried ./clang -mllvm -march=X86-64 -mcpu=core2 -o hello hello.c, but got "Unknown command line argument" Thanks, Ziqiang -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello, I've been trying to figure out how to reproduce the results of a single clang -O3 compilation to a binary with a multi-step process using opt. Specifically I have: clang -O3 foo.c -o foo.exe which I want to replicate with: clang -O0 -c -emit-llvm foo.c opt -O3 foo.bc -o foo_o.bc clang foo_o.bc -o foo.exe Any hints / suggestions on what additional flags I need to produce the same

Thanks Duncan It was really helpful. Regards Abdul On Fri, Jun 8, 2012 at 7:23 PM, Duncan Sands <baldrick at free.fr> wrote: > Hi, > > >> If I compile the program using the following command line i.e. >> >> $ clang -O3 -lm *.c > > > this may be doing link time optimization. > > >> >> then >> >> $ time ./a.out >>