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...h the expand as the third argument like below: setOperationAction(ISD::FSIN, MVT::f32, Expand); What will the expansion look like, since I don´t provide any custom implementation of the node? Also, what is the meaning of the MVT::f32 in this case? Thanks, Patosga 2016-06-05 19:16 GMT+01:00 Pierre Gagelin <Pierre.Gagelin at myport.ac.uk>: > Hi Patosga, > > You are on the right place to ask your questions and get help! > > Try to be more specific with your problem. We need some details to help > you =) > > Pierre > > On 5 June 2016 at 18:12, via llvm-dev <llvm-...

...:FSIN, MVT::f32, Expand); >> What will the expansion look like, since I don´t provide any custom >> implementation of the node? Also, what is the meaning of the MVT::f32 in >> this case? >> >> Thanks, >> Patosga >> >> 2016-06-05 19:16 GMT+01:00 Pierre Gagelin <Pierre.Gagelin at myport.ac.uk>: >> >>> Hi Patosga, >>> >>> You are on the right place to ask your questions and get help! >>> >>> Try to be more specific with your problem. We need some details to help >>> you =) >>> >&...

.../home/pierre/Desktop/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp:210:0 Any idea on what could be the cause of the null pointer and how to avoid it? Thanks a lot for your time! Pierre On 20 June 2016 at 15:45, John Criswell <jtcriswel at gmail.com> wrote: > On 6/20/16 6:17 AM, Pierre Gagelin via llvm-dev wrote: > > Hi everyone, > > I am trying to replace the call of a certain function with a call to > another function. It would for example replace the following: > > %call = tail call noalias i8* @func(i64 10) > by > %call = tail call noalias i8* @other_func(i...

Hi, I came on an old post (2012 or 2013) where somebody used this tool with the cpp arch option. I tried to use it too but it fails because no "cpp" architecture was referenced. Still on old posts I saw that it wasn't enabled by default for cmake builds so I added the flag -DLLVM_TARGETS_TO_BUILD="cpp" and "all" but still nothing. Was it removed from LLVM?

On 14 July 2016 at 20:07, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Jul 14, 2016, at 7:58 AM, Pierre Gagelin via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Hi, > > I am trying to use the CloneFunction from llvm/Transforms/Utils/Cloning.h > and I don't understand how the ValueToValueMapTy argument should be > initialized. For instance, let say I want to clone this fu...

Hello sir, I'm having some problems understading how llvm works. I'm following a concrete example and visualizing the DAG and the .s output and some stuff doesn´t seem to match. I sorry to bother you but I don´t know where I can expose my doubts and I wonder if you could redirect me to some discussion place where someone might help me. Thanks, Patosga

Hi everyone, I am having troubles but this shouldn't be hard to solve for many people here. I am beginning a runtime feature for the BoundsChecking pass and I want to replace the libc malloc&free. I followed the design of AddressSanitizer (Asan) and tried to use the INTERCEPTOR macro from the interception.h file of compiler-rt library. Here is the problem. The file I modify

> On May 25, 2016, at 6:05 AM, Pierre Gagelin via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hi everyone, > > I am having troubles but this shouldn't be hard to solve for many people here. I am beginning a runtime feature for the BoundsChecking pass and I want to replace the libc malloc&free. I followed the de...

Hi everyone, I am trying to replace the call of a certain function with a call to another function. It would for example replace the following: %call = tail call noalias i8* @func(i64 10) by %call = tail call noalias i8* @other_func(i64 10) I managed to declare other_func correctly but I am having troubles to understand how I should proceed to do the replacement. I tried to use

...on look like, since I don´t provide any custom >>>> implementation of the node? Also, what is the meaning of the MVT::f32 in >>>> this case? >>>> >>>> Thanks, >>>> Patosga >>>> >>>> 2016-06-05 19:16 GMT+01:00 Pierre Gagelin <Pierre.Gagelin at myport.ac.uk>: >>>>> >>>>> Hi Patosga, >>>>> >>>>> You are on the right place to ask your questions and get help! >>>>> >>>>> Try to be more specific with your problem. We need some de...

Hi, I am trying to use the CloneFunction from llvm/Transforms/Utils/Cloning.h and I don't understand how the ValueToValueMapTy argument should be initialized. For instance, let say I want to clone this function (to add an argument): define void @function(i32 %i) #0 { entry: %i.addr = alloca i32, align 4 store i32 %i, i32* %i.addr, align 4 ret void } to another function which should,

Hi everyone, After spending 2 months on LLVM generally speaking and more specifically on security passes (ASan, SAFECode, BoundsChecking) I wanted to know if there were an available implementation of strictly fat-pointer based approach to enforce bounds? If not, I wanted to implement one. I think it is interessant to have such a tool available even if there are better designs (SoftBound does

Thanks Ryan, I'm able to retrieved the type using the following code: Type *type=getElementPtrInst->getSourceElementType(); On Fri, Aug 12, 2016 at 7:00 PM, Ryan Taylor <ryta1203 at gmail.com> wrote: > Take a look at visitGetElementPtrInst in InstructionCombining.cpp for some > examples about how to iterate over GEP and check for type. > >

Dear Pierre, Stepping up a level, what is your goal in replacing calls to malloc() and free()? Is it any different than what SAFECode, SoftBound, or ASan do? Regards, John Criswell On 5/25/16 8:05 AM, Pierre Gagelin via llvm-dev wrote: > Hi everyone, > > I am having troubles but this shouldn't be hard to solve for many > people here. I am beginning a runtime feature for the BoundsChecking > pass and I want to replace the libc malloc&free. I followed the design > of AddressSanitizer...

Hi, I try to follow the use of the value yielded by a malloc call. Here follows a concrete example of what I expect and what I get. define void @main() #0 { entry: %ptr = alloca i8*, align 8 %call = call noalias i8* @malloc(i64 10) #2 store i8* %call, i8** %ptr, align 8 %0 = load i8*, i8** %ptr, align 8 call void @free(i8* %0) #2 ret void } It is a simple program that allocates and

...ld, though) - Guards are mostly not hoisted out of loops by LLVM; this needs improvement otherwise perf may suffer quite a bit. - The analysis code is in lib/Analysis/MemoryBuiltins.cpp Hope this helps. Please let us know if you have more questions. Nuno -----Original Message----- From: Pierre Gagelin via llvm-dev Sent: Friday, May 20, 2016 11:16 AM To: llvm-dev at lists.llvm.org Subject: [llvm-dev] BoundsChecking Pass Hi, I am a final year French student doing an internship at the University of Portsmouth. As I was taking hands on AddressSanitizer I took a look at BoundsChecking (both are...

Hi John, On 25 May 2016 at 16:11, John Criswell <jtcriswel at gmail.com> wrote: > Dear Pierre, > > Stepping up a level, what is your goal in replacing calls to malloc() and > free()? Is it any different than what SAFECode, SoftBound, or ASan do? > That's a good question. I didn't knew about SoftBound until now, so thank you for the name =). Anyway here is what I

Hi, I am a final year French student doing an internship at the University of Portsmouth. As I was taking hands on AddressSanitizer I took a look at BoundsChecking (both are in the lib/Transforms/Instrumentation folder). I found nothing on it except for the LLVM Documentation and references to BaggyBoundsCheck (which is not the same project. As far as I understood it is part of the SAFECode

Hi, I'm trying to replace pointer typed alloca instructions to allocate a vector of pointers. The idea is to change from [1] to [2]: [1]: %0 = alloca i<N>* [2]: %0 = alloca <3 x i8*> I did it this way: - first, create and insert [2] (for debug purpose, not necessary to insert) - mutate type so that replaceAllUsesWith can be called in a correctly typed way - replace all

Hi Nuno, On 22 May 2016 at 22:33, Nuno Lopes <nunoplopes at sapo.pt> wrote: > Hi Pierre, > > I'm the author of the BoundsChecking pass. > Wow, I am happily surprised to have an answer from you directly! > It's true there's little documentation about it (only mentioned in: > http://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html#availablle-checks). >