similar to: Writing a pass to retrieve instruction operand value

Hi John, Thank you so much for the valuable answer! :) However, i have one tough issue that i need to solve, in my pass : let's say here %s = add %a, %b I need to check if the value of %a or %b is 2 or 4 and then apply a transformation to the other operand accordingly, for example if the value of %a = 2 the i'll multiply %b by 2 in my transform pass. I'm having a hard time

hey john, yes indeed, that's what I'm trying, retreiving the values of %a and %b in an LLVM pass, sorry about the confusion. On Apr 24, 2016 7:18 AM, "John Criswell" <jtcriswel at gmail.com> wrote: > Dear Ammar, > > It is not clear what you are asking. %a and %b in your code below are not > constants; there is no way, at compile time, to determine what

hi everyone, I'm trying to get something like the lli - trace functionality that has been deprecated. I need the same thing that the trace command was doing i. e. the dynamic execution trace, any idea on what it has moved to if it still exists or how to implement it? Best Regards, Ammar Naqvi -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello Everyone, I need some help in retrieving the numeric value of an instruction operand from LLVM IR. this is what the IR looks like for a simple add function that adds two i32 integers define i32 @summ(i32 %a, i32 %b) #0 { entry: %add = add nsw i32 %b, %a ret i32 %add } i would like to know the integer value of %a and %b. I've tried -i->getOpcodeName() which gives me the

Hi Dean, thank you for the response! I'm a newbie to LLVM, a student working on an LLVM project so I'm not quite sure of what you're suggesting, please excuse my naivety. To clarify there used to exist this http://llvm.org/releases/1.0/docs/CommandGuide/lli.html where you could type "lli -trace 'filename.bc' and you would get a dump of the dynamic excutiion trace. I

Hi fellow devs, I was looking for converting LLVM IR to JavaBytecode by using lljvm project of https://github.com/davidar/lljvm They don't seem to compile, once i run *make* in the root directory it give me the error : cd include && make all make[1]: Entering directory `/home/rtiwari1/llvm_new/lljvm/include' make[1]: Nothing to be done for `all'. make[1]: Leaving

That source file was removed from LLVM in r232397 on March 16, 2015. It looks like lljvm hasn't been updated in a long time. LLVM's C++ APIs are not stable, so there is no expectation that a project built against LLVM's C++ API in 2015 would build or reasonably function against LLVM trunk. The project probably works against LLVM 3.6.2 which was (I believe) the last LLVM release to

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

Hi, 1. I think you should apply the attached patch to openssh-2.9p1, otherwise ssh-keyscan on linux boxes with glibc-2.1 will experience enormous timeout delays. 2. Is there a program like ssh-keyscan for the Version2 (dsa and rsa) keys?? regards Peter Breitenlohner <peb at mppmu.mpg.de> -------------- next part -------------- diff -ur openssh-2.9p1.orig/ssh-keyscan.c

In IntrinsicEmitter::EmitTypeGenerate, called from IntrinsicEmitter::EmitGenerator, here for (unsigned j = 0; j != N; ++j) { OS << " ArgTys.push_back("; EmitTypeGenerate(OS, ParamTys[j], ArgNo); OS << ");\n"; } I'm hitting this assertion: if (ArgType->isSubClassOf("LLVMMatchType")) { unsigned Number =

That's a bug. I'm working on a fix.... On Apr 15, 2009, at 10:16 AM, Villmow, Micah wrote: > In IntrinsicEmitter::EmitTypeGenerate, called from > IntrinsicEmitter::EmitGenerator, here > for (unsigned j = 0; j != N; ++j) { > OS << " ArgTys.push_back("; > EmitTypeGenerate(OS, ParamTys[j], ArgNo); > OS << ");\n"; > }

On Sep 28, 2007, at 11:36 AM, <Alireza.Moshtaghi at microchip.com> <Alireza.Moshtaghi at microchip.com> wrote: > I moved my code to 2.1 but still the same. > If I make ADD i16 legal, then it goes through, but it has problem > expanding it to i8. > Should I go ahead and customize it and do the same for all > instructions? > Or there is a more general thing that I

Hi, I recently upgraded to the latest LLVM build and encountered a problem where the API for Argument::addAttr has changed. Previously it was Argument::addAttr(Attribute A) and I was able to work with this. The latest build has changed the method addAttr so that it requires an AttributeSet argument (Argument::addAttr(AttributeSet AS). I'm not sure how to adjust to this change. The

Hi All, I have successfully configure the PXE and its working fine, the problem is that after timeout in the following msg Automatic boot in # second the screen stuck/hang there showing the above message or the menu if we choose to selection from menu until image is loaded from network. So, is there any way we can display another message after timeout. I tried MENU CLEAR and SAY Loading

I have this intrinsic definition for llvm. def int_opencl_math_fdistance_fast : Intrinsic<[llvm_float_ty], [llvm_anyfloat_ty, LLVMMatchType<0>]>; Can someone explain what LLVMMatchType does and how to specify it to match the first argument and not the return value? I've tried LLVMMatchType<1> but it fails in IntrinsicEmitter.cpp

On Apr 15, 2009, at 9:29 AM, Villmow, Micah wrote: > I have this intrinsic definition for llvm. > def int_opencl_math_fdistance_fast : Intrinsic<[llvm_float_ty], > [llvm_anyfloat_ty, LLVMMatchType<0>]>; > > > Can someone explain what LLVMMatchType does and how to specify it > to match the first argument and not the return value?

I moved my code to 2.1 but still the same. If I make ADD i16 legal, then it goes through, but it has problem expanding it to i8. Should I go ahead and customize it and do the same for all instructions? Or there is a more general thing that I can do? A. -----Original Message----- From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Chris Lattner Sent:

Hi All, Whenever an EXT3 partition is created some space is reserved for super-user, I used the mkfs.ext3 with option -m set to 0, but there is no effect it still reserve the space. How can i set the reserved-space to 0 or calculate the reserved-space in advance? Any suggestion/idea? Regards, -------------- next part -------------- An HTML attachment was scrubbed... URL:

Oops. That was premature. I think your original question was on the right track. TableGen distinguishes between known and "overloaded" types (like "llvm_anyfloat_ty" in your example). The overloaded types are numbered separately, and the argument to LLVMMatchType is an index into these overloaded types, ignoring the known types. So, in your case, the first

## TL;DR We introduce bcov, an open-source binary-level coverage analysis tool [1]. The details are discussed in our paper [2], which is accepted to ESEC/FSE'20. bcov statically instruments x86-64 ELF binaries without compiler support. It features several techniques that allow it to achieve high performance, transparency, and flexibility. For example, running "make