search for: interprocedural

Hi, I'm looking for interprocedural AAs and have, of course, found https://llvm.org/docs/AliasAnalysis.html. However, the AAs that come bundled with LLVM do not work interprocedurally in a way that I need it (on/with stack variables). The two interesting looking AAs come with the optional `poolalloc' module that hasn't been...

...-O3 into 2 or more levels of optimization, because as written, -O3 sounds pretty scary: "regardless of computation time", and given some people who thing that several minutes of compile time is acceptable, I think it's useful to split it into "aggresive opt", "aggresive interprocedural opt", and "aggressive interprocedural analysis with interprocedural opt". -- Misha Brukman :: http://misha.brukman.net :: http://llvm.cs.uiuc.edu

If I turn on one of the llvm interprocedural optimizations without turning on the analysis it uses. will the analysis be turned on automatically ? Thanks Xin

...3:05 PM Dounia Khaldi via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Thanks for your reply. > > Yes, I was about to recurse over the use list of the argument in the > called function. I did not want to pursue that because with this solution, > I am going to implement the interprocedural part myself and was wondering > if that was not already done. I was not also 100% sure that this will work > for any type of arguments. > > If, based on your response, this is my only solution then I will go for > it. > Yep. And it should work for any kind of argument -- they...

...evels of optimization, > because as written, -O3 sounds pretty scary: "regardless of computation > time", and given some people who thing that several minutes of compile > time is acceptable, I think it's useful to split it into "aggresive > opt", "aggresive interprocedural opt", and "aggressive interprocedural > analysis with interprocedural opt". Okay, sounds good. How about: -O3agg -O3ipo -O3aggipo :) ? Reid. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size:...

...but all I can say is that I have tried very small things related to building a compiler [0]. However I admit that I am still new to a lot of things. Like many others who are interested in compilers, I am interested in the Register Allocation problem too. I have been thinking about implementing an interprocedural register allocator from quite a while now. But I thought instead of trying it out on a toy compiler, why not just get my hands dirty in the real world. I was seeing if I could implement it on LLVM and incidentally, I noticed that the open projects page lists interprocedural register allocation as o...

Thanks for your reply. Yes, I was about to recurse over the use list of the argument in the called function. I did not want to pursue that because with this solution, I am going to implement the interprocedural part myself and was wondering if that was not already done. I was not also 100% sure that this will work for any type of arguments. If, based on your response, this is my only solution then I will go for it. Thanks, Dounia On Tue, Jul 26, 2016 at 5:51 PM, Sanjoy Das <sanjoy at playingwithpoi...

Hello, I need interprocedural alias analysis while I'm using GVN for infeasible path analysis. So, I've tried "-steens-aa" from poolalloc project, but it doesn't seem to be working as I expected. For example, int global; int bar(void) { return 5; } int foo(void) { int a; scanf("%d", &amp...

Hi Everyone, Can Someone tell me all the interprocedural optimizations that LLVM 2.1 supports. Thank You, Naineet Patel CSE IITB

...a discussion. I would really like to contribute to LLVM and > I think this is a good place for me to start. Is there something specific like a paper > that you guys would want me to read before diving in? > > I understand that register allocation itself is a tricky problem and doing an interprocedural > allocation is extremely hard. But I would like to try, at least try and fail if worst comes > to worst than not doing anything at all. At least by attempting to implement that, I will > have a better understanding of LLVM code base which may come in handy to contribute > to other part...

Hello, I have been using the USE class to access the use-def chains of different values. However, what I have noticed is that the set of users of a particular value is limited for the appearance of that variable in the current function. How can I get the interprocedural use of a particular value? For example, if a variable *a* is used as an argument in a function call *foo*, the USE analysis would go to the definition of* foo*, and get me the users of that argument in the called function as well. Currently, what USE does is that it returns the call as a use and st...

...t;fernando at cs.ucla.edu> wrote: > > > Hi, Sanjiv, > > those passes operate on the whole machine function. Each machine > function contains many basic blocks. If a program has many functions, the > register allocator will be called as many times, i.e it does not do > interprocedural allocation. > > best, > > Fernando Thanks for replying back. I am looking to write a regalloc pass that does interprocedural regalloc. By constructing a Call Graph and keeping the registers in a single call chain different so that i can avoid spilling (saving) across function calls. W...

...en I can get to that (I've got some important work priorities to contend with in mid-October). -- John T. ________________________________________ From: Jinwook Shin [Jinwook.Shin at microsoft.com] Sent: Thursday, October 06, 2011 12:59 PM To: Criswell, John T; llvmdev at cs.uiuc.edu Subject: interprocedural static backwards slicing Hello John et al - I have been struggling to implement static backwards slicing with LLVM. After digging llvmdev postings for some time, I see that other people were having similar difficulties and John's got almost complete code that may be shared. May I get a copy o...

...guys in the list could suggest something. Yet, you > can always dump it into a file, and read it again, everytime it is > necessary. Remember that RegAlloc will be called once per function. Also, > LLVM does very aggressive inlining of method calls, and this may cause the > benefits of interprocedural register allocation to be very small, if any. > There was one guy (google for Philip Brisk) who was working with > interprocedural RA on SSA-form programs. > > best, > > Fernando > > > > On 11/23/07, Fernando Magno Quintao Pereira <fernando at cs.ucla.edu> wrote:...

Hello John et al - I have been struggling to implement static backwards slicing with LLVM. After digging llvmdev postings for some time, I see that other people were having similar difficulties and John's got almost complete code that may be shared. May I get a copy of it, too? Better yet, it would be helpful for many other people if the code were checked in to an example directory or

Dear all, Is anyone aware of any implementation of an inter procedural slicing algorithm for LLVM? I am mostly interested in a static algorithm but a dynamic one can be helpful too. Thanks, Silviu Ganceanu Research Student, Ecole Polytechique Federale de Luasanne -------------- next part -------------- An HTML attachment was scrubbed... URL:

We have done a few class projects on static interprocedural slicing but they are all of "course project" quality. I will put you in touch with some of the students who did those, if you're interested? --Vikram Associate Professor, Computer Science University of Illinois at Urbana-Champaign http://llvm.org/~vadve On Aug 15, 2008, at 8...

Hello, I had a look at the global variable optimizer. In my opinion it handles a few special cases, when global variables can be replaced by local variables or be removed completely. Basically I think that this problem could be solved with an interprocedural live value analysis for global variables more generally. An assignment to a global variable can be removed, if this global variable is dead at this assignment. I know that this kind of analysis is not trivial to implement and may have a significant performance impact. However it might be useful. W...

There is/are implicit dependency for the optimization on its analysis. So, if you run the optimization, the analysis will be turned on implicitly, through the PassManager. Chuck On 2/12/2012 10:10 AM, Xin Tong wrote: > If I turn on one of the llvm interprocedural optimizations without > turning on the analysis it uses. will the analysis be turned on > automatically ? > > Thanks > > Xin > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http...

http://dl.acm.org/citation.cfm?id=2843863 Luke Jones, Ryan Whelan, Jeremy Blackthorne, and Graham Baker. 2015. Flowtables: Program Skeletal Inversion for Defeat of Interprocedural Analysis with Unique Metamorphism. In Proceedings of the 5th Program Protection and Reverse Engineering Workshop (PPREW-5). ACM, New York, NY, USA, , Article 6 , 11 pages. DOI=http://dx.doi.org/10.1145/2843859.2843863 -------------- next part -------------- An HTML attachment was scrubbed... URL: &...