similar to: [LLVMdev] Dead Code Elimination and undef values

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

Hi Cristianno, Thank you, it works :) with an extra cast:                                     Value *v ......                                     ConstantInt* RR = (ConstantInt *)v;                                     uint64_t VV = (RR->getValue()).getLimitedValue();                                     errs()<<"\nRR  "<<VV<<"\n";

Oops, that's true: I forgot about that XD sorry =) Glad I could help, -- Cristianno Martins PhD Student of Computer Science University of Campinas cmartins at ic.unicamp.br <cristiannomartins at hotmail.com> On Tue, Jun 25, 2013 at 4:38 AM, Alexandru Ionut Diaconescu < cyrusthevirus001x at yahoo.com> wrote: > Hi Cristianno, > > Thank you, it works :) > > with

Hello again, First of all, thanks for all the answers =) they really helped a lot =D *Have you verified that some other pass is not adding the function declarations back in after your pass is executed (e.g., by using the -debug-pass=Executions argument to see what passes run after your pass)?* I considered that for a moment, but I realized that wouldn't be possible for two reasons: I

Alexandru Ionut Diaconescu wrote: > Hi Cristianno, > > Thank you, it works :) > > with an extra cast: > Value *v ...... > ConstantInt* RR = (ConstantInt *)v; Please use "cast<ConstantInt>(v)" instead. See http://llvm.org/docs/ProgrammersManual.html#the-isa-cast-and-dyn-cast-templates . Nick > uint64_t VV = (RR->getValue()).getLimitedValue(); >

Hello there, I'm writing some LLVM passes, and just ran into an interesting situation: now, I don't know if I misunderstood the way doFinalization is supposed to work, but I hope someone could help =) One of the transformations I wrote needed to replace some instructions within the code, so I needed to clean up the code after the process was completed. The pass basically swapped some

Hello ! This may be a trivial question, but I cannot get fields from a Value type. If my Value is i32 1, how can I store 1 in a different structure (an integer) ? For the type, I have getType(). For the value, I see no method in Value.h. I tried to cast to ConstantExpr and then to get operands, or cast to ConstantDataArray and then use getAsString(), but is not working. How should I get the

Hello there, I'm trying to use a simple implementation of a queue (my own implementation of it, actually), and I'm trying to use the functions defined on my queue class inside some llvm-ir code. Unfortunately, the names of the functions are being messed up, then I created some function wrappers just to avoid having to deal with the C++ weird function renaming. So, to easily wrapper the

Hello guys, So, I'm stucked in a problem involving a Function and a derived class. Well, I was refactoring part of my pass code, and created two classes in this process that are interesting here: class A and class B. Class B inherits from class A; on the other hand, class A has some pure virtual methods (already implemented in class B), and a Module, that holds only one auxiliary function (a

On Tue, May 14, 2013 at 11:42 AM, Cristianno Martins < cristiannomartins at gmail.com> wrote: > Hello there, > > I'm trying to use a simple implementation of a queue (my own > implementation of it, actually), and I'm trying to use the functions > defined on my queue class inside some llvm-ir code. Unfortunately, the > names of the functions are being messed up,

Hello again, Thanks for the responses =) Dmitry, I have two points to comment: - First, I applied these two patches, and the .cbe.c file came out ok, except for one little thing -- the global variable was created with both modifiers: static and extern. Then, I just added a single guard to prevent this to happen (in a case of a variable having local linkage, the "extern" part was not

Hi Rinaldini, In order to find information about loops inside a given function you should use something like "LoopInfo *LI = P->getAnalysis<LoopInfo>()", remembering to add "AU.addRequired<LoopInfo>();" to your getAnalysisUsage method. If the function you are interested to is not located in the module being compiled (if you created it as an auxiliary function,

Hi Vivek, you can also include these lines below to your ~/.bash_profile: LLVM_BUILD="/Developer/llvm/build" # Path to your build directory alias new-clang="$LLVM_BUILD/bin/clang -Wno-expansion-to-defined -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include" alias new-clang++="$LLVM_BUILD/bin/clang++

On 5/6/15 10:19 AM, Kuperstein, Michael M wrote: > > Hello Cristiano, > > I don’t think doFinalization() is really meant to be used this way. > My understanding is that doInitialization() and doFinalization() are designed specifically for modifying the LLVM IR (otherwise, why would a mutable reference to the Function be provided)? If that is not the case, then there is either a

Hi Alexandru, if you have a Value pointer named v, you could use the method v->getValue(). getLimitedValue(), which returns uint64_t, that can be casted as int. Hope I could help, -- Cristianno Martins PhD Student of Computer Science University of Campinas cmartins at ic.unicamp.br <cristiannomartins at hotmail.com> On Tue, Jun 25, 2013 at 4:05 AM, Alexandru Ionut Diaconescu <

Hello again, So, after some changes, I inserted intentionally values with use in other modules, and I get the following error: While deleting: i1 % Use still stuck around after Def is destroyed: %c = phi i1 [ false, <badref> ] [...] Assertion failed: (use_empty() && "Uses remain when a value is destroyed!"), function ~Value, file

Dear All, I'm trying to add a new alias analysis to the alias analysis group in LLVM 3.2. This new pass is linked statically into a tool that lives outside the LLVM source tree, so I'm trying to avoid making patches to the LLVM sources. I've added the INITIALIZE_AG_PASS_BEGIN() and INITIALIZE_AG_PASS_END() code to the pass, manually scheduled it before the

I think I understood that, but what I mean is what is the function responsible to do mapping is it MapValue() in ValueMapper.h? Thanks for your help On 6 June 2013 09:54, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > Map every basic block from the CFG to a set of integers. The successors > from the CFG can be used to make the edges in your simplified

Hi there, I'm trying to get a list of predecessors of a BasicBlock. I'm using a code similar to that on here (http://llvm.org/docs/ProgrammersManual.html#iterate_preds), but it appears to be more nodes been iterating that it should. Now, when I print out the llvm IR, I get something like: […] while.body: ; preds = %7, %while.cond […] for a code that

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 Grandmaison ________________________________________ From: llvmdev-bounces at cs.uiuc.edu [llvmdev-bounces at cs.uiuc.edu] On Behalf Of Cristianno Martins [cristiannomartins at gmail.com] Sent: Thursday, April 26, 2012 5:52 PM To: