search for: machinefunctionpass

Hello everyone, I have written several complex passes till now, but I cannot write a MachineFunctionPass pass. It just gives me segfault. Hence I reduced the pass to the following form : using namespace llvm; namespace { class CFGexplorator : public MachineFunctionPass { public: static char ID; // Pass identification, replacement for typeid CFGexplorator() : MachineFunctionPass(ID) {...

I want to create share memory in my MachineFunctionPass, and insert load/store instruction for it. The way to create share memory is to add global variables which are in share memory address space (not sure if it is the only way). Therefore, I should add global variables in fixed size in doInitialization, and record its real size in other place like Mac...

...a register allocator. I know PTX is virtual ISA, but I will use PTX as the input of the simulator, gpgpu-sim, so it makes sense. Whether to insert shared memory is depend on the analysis that needs LiveAnalysis, PTX InstrInfo, PTX RegisterInfo, etc. That's why I need to add global variables in MachineFunctionPass. Antony 2013/8/6 Justin Holewinski <justin.holewinski at gmail.com> > Yes, global variables are the only way to access shared memory. > > I'm just trying to get an idea of what you're aiming to accomplish to see > if we can improve on the interface here. A MachineFunc...

Yes, global variables are the only way to access shared memory. I'm just trying to get an idea of what you're aiming to accomplish to see if we can improve on the interface here. A MachineFunctionPass runs after instruction selection and relying on doInitialization to run before instruction selection is an implementation detail that I do not believe is guaranteed anywhere (I could be wrong!). And modifying the IR does in fact violate the rules for a MachineFunctionPass (see bullet 1 in http://l...

I found that : "Code generator passes are registered and initialized specially by TargetMachine::addPassesToEmitFile and similar routines, so they cannot generally be run from the *opt* or *bugpoint* commands."...So how I can run a MachineFunctionPass? In the end, I just want to apply a DFS on a CFG of a function. And I need oriented edges and wanted to use MachineBasicBlock::const_succ_iterator. It is there a way to get the CFG with oriented edges by using a FunctionPass? Thank you ! On Fri, Mar 15, 2013 at 1:30 PM, Alexandru Ionut Diaconescu...

I investigated the MachineFunctionPass (that is runOnMachineFunction, I believe). In my experimentation it didn't seem that the MachineFrameInfo was populated (it consistently said that the stack depth was 0, for example). I might have been doing something wrong? On Fri, Jul 8, 2011 at 5:21 PM, John Criswell <criswell at illinoi...

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 s...

...know PTX is > virtual ISA, but I will use PTX as the input of the simulator, gpgpu-sim, > so it makes sense. > Whether to insert shared memory is depend on the analysis that needs > LiveAnalysis, PTX InstrInfo, PTX RegisterInfo, etc. That's why I need to > add global variables in MachineFunctionPass. > > Antony > > > 2013/8/6 Justin Holewinski <justin.holewinski at gmail.com> > >> Yes, global variables are the only way to access shared memory. >> >> I'm just trying to get an idea of what you're aiming to accomplish to see >> if we can imp...

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 -------------- n...

Hello, I want to add a global variable of arrayType in my MachineFunctionPass. However, I only get const Module from MachineFunction.getMMI().getModule(). I can't add any global variable to a const Module. Another way is to add a global variable in doInitialization in my MachineFunctionPass, but I can't determine the size of my arrayType for global variable in doIni...

...virtual ISA, but I will use PTX as the input of the simulator, gpgpu-sim, >> so it makes sense. >> Whether to insert shared memory is depend on the analysis that needs >> LiveAnalysis, PTX InstrInfo, PTX RegisterInfo, etc. That's why I need to >> add global variables in MachineFunctionPass. >> >> Antony >> >> >> 2013/8/6 Justin Holewinski <justin.holewinski at gmail.com> >> >>> Yes, global variables are the only way to access shared memory. >>> >>> I'm just trying to get an idea of what you're aiming to acco...

...share memory in CUDA. What I mean is share memory, so MachineFrameInfo is not suitable to me. And I need codegen data, so FunctionPass is also not suitable. Anyway, thanks for the suggestion. Antony 2013/8/5 Justin Holewinski <justin.holewinski at gmail.com> > If you're running a MachineFunctionPass, then the code has already been > lowered to machine instructions and modifying the original IR will most > likely not do what you want. You should only be using the IR as an > immutable object for reference. If you want to change the IR, I would > suggest using a FunctionPass instead...

Hello all, I need to modify llvm bytecode / native code just before it is emitted i.e. after all the regular operations and optimizations are done. I was told that this can be achieved by implementing a MachineFunctionPass. I searched the internet for some tutorials or some example MachineFunctionPass but found nothing. Kindly point some links, or anything that may help. Thank you. Regards, Sachin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm...

Can you tell us a bit more about what you're trying to accomplish? Changes to the IR performed during MachineFunctionPass::doInitialization will likely propagate down through code generation, but at that point what is the purpose of using a MachineFunctionPass? You won't have any analysis or instruction information available until runOnMachineFunction. On Mon, Aug 5, 2013 at 12:00 PM, Anthony Yu <swpenim at...

On 7/8/11 4:49 PM, Andrew Ruef wrote: > I investigated the MachineFunctionPass (that is runOnMachineFunction, > I believe). A MachineFunctionPass is a class that you inherit from to write a transform that operates on MachineInstrs (i.e., native code instructions generated from the LLVM IR instructions). The runOnMachineFunction() method is its entry point (i.e., the...

...> > -----Original Message----- > > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] > > On Behalf Of Antony Yu > > Sent: Monday, August 05, 2013 3:41 AM > > To: llvmdev at cs.uiuc.edu > > Subject: [LLVMdev] Can I add GlobalVariable in MachineFunctionPass ? > > > > Hello, > > > > I want to add a global variable of arrayType in my MachineFunctionPass. > > However, I only get const Module from > > MachineFunction.getMMI().getModule(). > > I can't add any global variable to a const Module. > > Another...

...t I will use PTX as the input of the simulator, gpgpu-sim, >>> so it makes sense. >>> Whether to insert shared memory is depend on the analysis that needs >>> LiveAnalysis, PTX InstrInfo, PTX RegisterInfo, etc. That's why I need to >>> add global variables in MachineFunctionPass. >>> >>> Antony >>> >>> >>> 2013/8/6 Justin Holewinski <justin.holewinski at gmail.com> >>> >>>> Yes, global variables are the only way to access shared memory. >>>> >>>> I'm just trying to get an id...

...t runOnMachineFunction. Micah > -----Original Message----- > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] > On Behalf Of Antony Yu > Sent: Monday, August 05, 2013 3:41 AM > To: llvmdev at cs.uiuc.edu > Subject: [LLVMdev] Can I add GlobalVariable in MachineFunctionPass ? > > Hello, > > I want to add a global variable of arrayType in my MachineFunctionPass. > However, I only get const Module from > MachineFunction.getMMI().getModule(). > I can't add any global variable to a const Module. > Another way is to add a global variable in do...

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>. 2016-0...

If you're running a MachineFunctionPass, then the code has already been lowered to machine instructions and modifying the original IR will most likely not do what you want. You should only be using the IR as an immutable object for reference. If you want to change the IR, I would suggest using a FunctionPass instead of a MachineFunctio...