similar to: Need help on how to write MachineFunctionPass

Deer All, I wanted to write MachineFunctionPass which needs to be run after global register allocation pass. I have read LLVM documentation and blogs and able to write simple pass which will is invoked through opt command line. However, I could able to find any blogs or document to explains clear steps for writing MachineFunctionPass. Please suggest some documents or blogs which will help me

Hello everyone, I have written simple LLVM passes, but I cannot able to write a MachineFunctionPass pass. I am following the steps form the following link but it is not working: http://www.gabriel.urdhr.fr/2014/09/26/adding-a-llvm-pass/ Please share the sample MachineFunctionPass code or steps to follow to write MachineFunctionPass. Thanks, Bala -- Thanks, Bala IIITA Allahabad --------------

First you should learn how to write a pass and then a MachineFunctionPass. >From LLVM website, you can refer to http://llvm.org/docs/WritingAnLLVMPass.html And for outside pass, you can refer to http://adriansampson.net/blog/llvm.html It's a great article. And the author put the source code on Github <https://github.com/sampsyo/llvm-pass-skeleton>. 2016-03-01 14:36 GMT+08:00

Hello , I have written a very simple MachineFunction Pass that currently does nothing. It compiles fine but when I try to load it with llc it give me following error: llc -optimize-regalloc=0 -load lib/GCRA.dylib -regalloc=gc test/fibo.bc Pass 'Bundle Machine CFG Edges' is not initialized. Verify if there is a pass dependency cycle. What is going wrong here ? Here is my very simple

*Vivek Pandya* On Fri, Mar 18, 2016 at 10:03 PM, Quentin Colombet <qcolombet at apple.com> wrote: > Hi Vivek, > > On Mar 16, 2016, at 1:00 PM, vivek pandya via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Hello, > > Probably this may be too late to start thinking about this project but I > think this is particularly useful feature for LLVM. >

Hello, Probably this may be too late to start thinking about this project but I think this is particularly useful feature for LLVM. A quick use I can think of this is Implementing Inter-procedural Register Allocation ( for Research purpose ). I have start looking at the code for MachineFunctionPass, I think currently MachineModule class is not available ( the project work will include that ) but

On 3/18/16 12:33 PM, Quentin Colombet via llvm-dev wrote: > Hi Vivek, > >> On Mar 16, 2016, at 1:00 PM, vivek pandya via llvm-dev >> <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >> >> Hello, >> >> Probably this may be too late to start thinking about this project >> but I think this is particularly useful

Hi All, I wanted to collect the register usage stats for the program assigned by compiler(in other words "how many time each register will be accessed by the program when it will execute"). How to write LLVM pass which will analyse the code after LLVM global register allocation pass and output the stats. Regards, -Bala -- Thanks, Bala IIITA Allahabad -------------- next part

Hi Vivek, can you elaborate why you're looking for a one-size-fits-all solution? What is the noteworthy benefit over adding a new-pm specific implementation? Several changes you mention are purely for the benefit of supporting the legacy PM (which already has a working, tried, and tested solution). E.g. `getCounterIdForName`, the FIXMEs you mention, and the callbacks. All of these are

Hello all, After reading OptBisect and DebugCounter related code and playing bit around it I have following simple design: - Add a debug counter for opt-bisect. Initilize it against option -opt-bisect-limit=<limit>. - DebugCounter is a singleton class so can be accessed by both new and legacy passmanager. We may need few more static method like getCounterIdForName(std::string &Name)

> On May 15, 2016, at 12:43 AM, vivek pandya <vivekvpandya at gmail.com> wrote: > > > > Vivek Pandya > > > On Wed, May 11, 2016 at 9:43 AM, Mehdi Amini <mehdi.amini at apple.com <mailto:mehdi.amini at apple.com>> wrote: > >> On May 10, 2016, at 6:06 PM, Hal Finkel <hfinkel at anl.gov <mailto:hfinkel at anl.gov>> wrote: >>

Hi Vivek, bisect and optnone are certainly low hanging fruit in terms of implementation. On the other hand they need a cleaner design than they have now. E.g., OptBisect today is a managed static, which we absolutely should get rid of. Instead, bisect functionality can be much more cleanly implemented on top of the debug counters! While the function call for optnone doesn't strike me as

Hi, Indeed, and I think this suggestion will succeed best if the delta between what community members do now and what they would need to do is small. Loitering on one extra IRC room is trivial; loading a whole new system just at the right time is likely to get fewer members. James On Sun, 20 Mar 2016 at 14:47, Bruce Hoult <bruce at hoult.org> wrote: > IRC doesn't archive messages,

As a point of clarification, optnone is already being handled by the pass itself in the legacy implementation. The skip[IR unit] functions are provided by the pass base classes, and the attribute is checked there. This happens any time the legacy wrapper is run, no matter how it is run. Regarding the opt-bisect design, I’m not particularly fond of the managed static either, but I do want to

Thank you Vivek, I posted an according patch on phabricator. I also took the liberty to change the design a little bit (based on the open projects page http://llvm.org/OpenProjects.html). But take it with a grain of salt, I'm no html expert :) Best regards, Matthias Am Dienstag, 10. Mai 2016 19:48:21 UTC+2 schrieb vivek pandya: > > > > *Vivek Pandya* > > > On Tue, May

@James I am not sure in IRC if we can retrieve back the older messages. So consider Slack as suggestion only. *Vivek Pandya* On Sun, Mar 20, 2016 at 6:29 PM, James Molloy <james at jamesmolloy.co.uk> wrote: > Hmm. But we already use IRC, we don't already use Slack (as a community). > > On Sun, 20 Mar 2016 at 10:57, vivek pandya <vivekvpandya at gmail.com> wrote: >

On Fri, Sep 06, 2019 at 10:17:05AM -0400, Vivek Goyal wrote: > On Fri, Sep 06, 2019 at 11:52:10AM +0100, Stefan Hajnoczi wrote: > > On Thu, Sep 05, 2019 at 03:48:49PM -0400, Vivek Goyal wrote: > > > +static void virtio_fs_drain_queue(struct virtio_fs_vq *fsvq) > > > +{ > > > + WARN_ON(fsvq->in_flight < 0); > > > + > > > + /* Wait for in

On Sat, May 28, 2016 at 7:33 AM, Matthias Braun <matze at braunis.de> wrote: > static void setXXX(MachineInstr &MI, ...) { > for (MachineOperand &MO : MI.operands()) { > if (MO.isRegMask()) > MO.setRegMask(...); > } > } > > Ok this is what Mehdi Amini suggested. I will do that, but just to note this will add method to MO so this change is not completely

Sent from my iPhone > On May 27, 2016, at 7:02 PM, vivek pandya <vivekvpandya at gmail.com> wrote: > > > >> On Sat, May 28, 2016 at 7:29 AM, Matthias Braun <matze at braunis.de> wrote: >> >>> On May 27, 2016, at 6:55 PM, vivek pandya via llvm-dev <llvm-dev at lists.llvm.org> wrote: >>> >>> >>> >>> On

static void setXXX(MachineInstr &MI, ...) { for (MachineOperand &MO : MI.operands()) { if (MO.isRegMask()) MO.setRegMask(...); } } > On May 27, 2016, at 7:02 PM, vivek pandya via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > On Sat, May 28, 2016 at 7:29 AM, Matthias Braun <matze at braunis.de <mailto:matze at braunis.de>> wrote: >