similar to: [LLVMdev] appropriate for run-time compilation of DSL?

On Mon, Apr 11, 2011 at 11:50 AM, edA-qa mort-ora-y <eda-qa at disemia.com> wrote: > I wish to know whether LLVM is an appropriate choice for a project I'm > working on (excuse me if this is the wrong list for this question). > > I have a domain-specific-language (DSL) that is currently compiled to a > custom byte-code and run in a VM. This is written in C++. The DSL can

On 04/11/2011 06:24 PM, Reid Kleckner wrote: > That should work perfectly fine. The LLVM JIT has support for > declaring and calling out to native functions in the application > through libffi. How about support for a custom memory model? I know this sounds odd, but basically the variables need to map to a specific block of memory: the global heap. The enclosing program uses memcpy to

On Mon, Apr 11, 2011 at 11:37 PM, edA-qa mort-ora-y <eda-qa at disemia.com> wrote: >> There isn't great support for this in the LLVM JIT, but IIRC some >> clients have managed this by subclassing the JITMemoryManager to copy >> the code when the function has finished being emitted.  I don't know >> if it's possible to ensure that the code will be position

I would like to have my IR call a function which exists in the host program (the one which is creating the ExecutionEngine). I don't see from the docs on Linker, ExecutionEngine, or Module how I would go about doing this. That is, I have a function like this in my C++ code: void callback( int64_t object, int32_t value ); I would like to produce IR which links back to this function and thus

I'm having some troubles building LLVM 3.3 (previously I was using 3.2). I'm getting a lot of errors in the various architecture support: In file included from PPCFrameLowering.h:17:0, from PPCTargetMachine.h:17, from PPCSelectionDAGInfo.cpp:15: PPCSubtarget.h:60:49: error: expected class-name before ‘{’ token PPCSubtarget.h:196:30: error:

That makes it more mysterious then since I am indeed only calling a main function. Perhaps I have to invoke it a different way. Here's my call I have now: auto main = linker->getModule()->getFunction( "main" ); std::vector<llvm::GenericValue> args(2); args[0].IntVal = llvm::APInt( platform::abi_int_size, 0 ); args[1].PointerVal = nullptr; llvm::GenericValue gv =

Is there a way to get the size of a type in the IR assembly code? I know the size must be known since alloca and getelementptr both implicitly use it, but I don't see any way to get access to the size directly. I know my final compiler will have to get the size itself, but I'm just doing some simple tests directly in assembly now and am hoping there is an easy way to get the size of a

Yes, but why is it even copying the memory?  It already has a pointer which it can cast and load from -- and does so in other scenarios. I'm wondering whether this copying is somehow required and I'm missing something, or it's just an artifact of the clang emitter. That is, could it not omit the memcpy and cast the original variable? On 18/04/18 19:43, Krzysztof Parzyszek via

I'm having issues of my compiler, and JIT execution, of LLVM IR being rather slow. It's accounting for the vast majority of my full compilation time.  I'm trying to figure out why this is happening, since it's becoming an impediment.  (Note: by slow I mean about 3s of time for only about 2K of my front-end code, 65K lines of LLVM-IR) Using valgrind I see some functions which seem

I'm creating a struct of `{i8,i64}` and `DataLayout::getTypeAllocSize` is returning `12`. `getStructLayout` also gives an `4` offset for the second element. The native ABI, and clang, for the same type are producing a size of 16, with an alignment of 8, for the second element. This is for the system triple "x86_64-linux-gnu" What could be causing this difference in alignment and

It was the return type which was i64. I changed it also to my abi_int_size and it works now. I have to take care of a few other type translations, but it looks like MCJIT is working now. Thank you. On 08/11/13 18:12, Yaron Keren wrote: > Something must be wrong with the Function Type. Try to debug into > runFunction to see which if condition fails. > Just a guess, if this is on 64

Hi, On 12/11/12 20:05, edA-qa mort-ora-y wrote: > I would like to have my IR call a function which exists in the host > program (the one which is creating the ExecutionEngine). I don't see > from the docs on Linker, ExecutionEngine, or Module how I would go about > doing this. > > That is, I have a function like this in my C++ code: > void callback( int64_t object,

I think I see a potential issue. My ExecutionEngine setup may not be using the same target as my object code emitting, and in this test case I'm running in the ExecutionEngine.  I'll go over this code to ensure I'm creating the same triple and see if that helps -- I'm assuming it will, since I can't imagine the exact same triple with clang would produce a different layout. On

Something must be wrong with the Function Type. Try to debug into runFunction to see which if condition fails. Just a guess, if this is on 64 bit system the first argument type may be int64 but needs to be int32. Yaron 2013/11/8 edA-qa mort-ora-y <eda-qa at disemia.com> > That makes it more mysterious then since I am indeed only calling a main > function. Perhaps I have to invoke

It sounds like your DataLayout may not match clang's for x86_64-linux. What does it say about the alignment of i64? On Wed, Apr 18, 2018 at 12:05 PM edA-qa mort-ora-y via llvm-dev < llvm-dev at lists.llvm.org> wrote: > I'm creating a struct of `{i8,i64}` and `DataLayout::getTypeAllocSize` > is returning `12`. `getStructLayout` also gives an `4` offset for the > second

Yes, I understand that as well (it's what I'm trying to recreate in my language now). I'm really wondering why it does the copy, since from what I can tell it could just as easily cast the original value and do the load without the memcpy operation. That is, the question is about the memcpy and extra alloca -- I understand what it's doing, just not why it's doing it this way.

I'm having a problem with my code generating empty lines and it appears to be the CLib `open` function generating an empty line when used within the JIT-VM. If I compile my program to an exe file it doesn't happen. I also have a lot of other code running in the VM without this problem, it's somehow particular to `open`. A chunk of my IR that calls `open`: defer_body_26:

I'm trying to get MCJIT working but I get the following errors: Full-featured argument passing not supported yet! UNREACHABLE executed at MCJIT.cpp:322! I'm sure the first one will be a problem, but the second one prevents me from testing anything. I don't know how to fix the problem. My code works when using the non-MC JIT, and I added to my EngineBuilder: .setUseMCJIT(true)

I'm working on exception handling and having some trouble with type information. My personality/types work fine when running in the JIT, but when I produce object files and link them it fails. In particular, from an action record and the LSDA I get a type table entry. The problem is this doesn't appear to be pointing to a valid location. If I derefence it a segfault occurs. Are there

I'm having trouble figuring out what the error "Instruction does not dominate all uses!" means. I'm trying to construct a call to a function with two parameters. The printed IR, with error, looks like this: define i32 @add(i32, i32) { EntryBlock: %2 = add i32 %0, %1 ret i32 %2 } define i32 @eval_expr() { EntryBlock: ret i32 <badref> } Instruction does not dominate