similar to: [LLVMdev] Passmager

Hello, When we invoke the loop-unroll pass, the compiler is crashing. From the earlier posts in the mailing-list and from the bug reports, it is a known problem. Is there some one working on this bug? -Suresh

Sorry, then I don't understand. If I invoke backend with target->addPassesToEmitFile, it adds both opt and llc passes. Thus, PassManager contains both opt and llc passes after that. In case of crash, bugpoint reloads all passes from the failing pass manager to the separate instance of opt. If opt and llc both do not support such mixing, then I'm guessing I need to replace

Hi Duncan, Is it correct that opt does not understand codegen passes, but llc understands both analysis/transformation and codegen passes? I would like to modify bugpoint to work on this end. Thanks, - D. 2012/6/29 Duncan Sands <baldrick at free.fr>: > Hi Dima, > >> I'm trying to understand why opt tool does not know some of the >> registered passes, for example,

Hello, I am working on finding good optimization sequences for a given program (phase ordering problem). I have the following setup. 1) The source programs are translated into LLVM IR using -O0 + -scalarrepl. 2) Find an optimization sequence using some strategy which translates the IR generated in the previous step into another IR. 3) Apply llc -O2 and map the IR in to target assembly code.

Hello, I tried to do some small experiments on the loop unroll transformation. Following is the Test Program. I compiled it as follows: $ opt -loop-rotate -debug-only=loop-unroll -loop-unroll -unroll-count=2 test1.o -S -o test1.s ------------------ int a[1024]; int main() { int i, sum=0; for(i=0; i<1024; ++i) sum += a[i]; printf("%d",sum); } ------------------- I got

Hi Dmitry, > Is it correct that opt does not understand codegen passes, but llc > understands both analysis/transformation and codegen passes? no. Ciao, Duncan. I would > like to modify bugpoint to work on this end. > > Thanks, > - D. > > 2012/6/29 Duncan Sands <baldrick at free.fr>: >> Hi Dima, >> >>> I'm trying to understand why opt

Hi Mark, > You are confusing stopping the unwinding at *some* levels or at *all* > levels. > Eg. > invoke > call > call > invoke > call > call > unwind the dwarf unwinder only stops and runs user code at the invokes. It does restore registers and so forth at every stack frame. This is extra work done at unwind time that reduces the cost

Dear all, Is there a command line argument which prints the order of application of various analysis/transformation passes on a program using clang? -Suresh

On 19 June 2011 14:44, Suresh Purini <suresh.purini at gmail.com> wrote: >  I am doing few experiments to do understand optimization phase > interactions. Here is a brief description of my experiements. > > 1. I picked the list of machine independent optimizations acting on > llvm IR (those that are enabled at O3). > 2.  for each optimzation in the optimization-list >  

Hi Duncan, I see the similarities with GCC and Bill's proposal, makes sense. On 7 December 2010 20:20, Duncan Sands <baldrick at free.fr> wrote: >>   1. It eases the future elimination of invoke, or at least, the >> treatment of current instruction-level exception (as in Java) in a >> cleaner way. > > I don't see what is cleaner about it, except that it is

Hello there, I'm writing a transformation pass for LLVM, and I hoped to use dce to clean up the resulting code after my pass. I just have some questions about LLVM's dce implementation. Well, my transformation is a function pass, and, after the changes are made, some instructions are not needed anymore. In order to easily get rid of those instructions, I'm setting all their uses to

Dear all, I am doing few experiments to do understand optimization phase interactions. Here is a brief description of my experiements. 1. I picked the list of machine independent optimizations acting on llvm IR (those that are enabled at O3). 2. for each optimzation in the optimization-list a) Compiled the program using 'clang -c O0 -flto program.c' b) opt

Can I specify passes that I want run directly to llvm-gcc? I don't want all of -O3, for example. I tried llvm-gcc -raiseallocs ..., but that didn't work. I also tried running cc1 directly and it didn't take -raiseallocs as a parameter either. Duncan Sands wrote: > On Tuesday 28 April 2009 04:02:47 am Ryan M. Lefever wrote: >> I assume that when -O3 (or O2 or O1) is

Hi, I have made some changes in the LowerTypeTests Pass of opt, and would like to use these changes with the clang version I have downloaded. I compiled clang and llvm from scratch, made my changes in LowerTypeTests.cpp, and recompiled clang and opt. When I run clang with the appropriate flags to invoke the pass, it invokes the pass as originally written, but when I run opt on the relevant

Hi Renato, >>> 1. It eases the future elimination of invoke, or at least, the >>> treatment of current instruction-level exception (as in Java) in a >>> cleaner way. >> >> I don't see what is cleaner about it, except that it is overall at a higher >> level of abstraction (see above). > > If I got it right, his proposal had the unwind path

On Dec 1, 2010, at 10:20 AM, Duncan Sands wrote: > Hi Bill, this proposal seems strangely complicated. I don't see the advantage > of the dispatch instruction over just attaching the information to each invoke. > Right now you have > > invoke void @_Z3foov() > to label %invcont unwind label %catch.handlers > > catch.handlers: landingpad > dispatch resume

Devang, I meant as an end user. -Suresh On Thu, Jun 16, 2011 at 11:00 PM, Devang Patel <dpatel at apple.com> wrote: > Suresh, > > > On Jun 15, 2011, at 9:13 PM, Suresh Purini wrote: > >> Dear all, >> >> What is the default loop-unroll factor in llvm? How can we specify >> our own unroll-factor? > > Here "we" means end user or a

Hi , This Is 'Suresh M' from AMD compiler team. 1) I obtained the source code of llvm and pool-alloc (relase_32 versions ) using the following commands, svn co http://llvm.org/svn/llvm-project/llvm/branches/release_32 llvm cd llvm/projects svn co http://llvm.org/svn/llvm-project/poolalloc/branches/release_32 poolalloc 2) Was able to build the binaries and libraries

Hi Cristianno, On 01/06/13 01:49, Cristianno Martins wrote: > Hello there, > > I'm writing a transformation pass for LLVM, and I hoped to use dce to clean up > the resulting code after my pass. I just have some questions about LLVM's dce > implementation. > > Well, my transformation is a function pass, and, after the changes are made, > some instructions are not

On Tuesday 28 April 2009 04:02:47 am Ryan M. Lefever wrote: > I assume that when -O3 (or O2 or O1) is passed to llvm-gcc, then it > utilizes opt. How do I determine what passes opt runs? How do I > determine what external tools (and arguments) llvm-gcc is invoking? It doesn't invoke opt, it runs the passes directly. You can see what passes it is running by passing