similar to: Help to understand LoadValueFromMemory

Hi all, I have the following C code: #include<stdio.h> int main(int argc, char *argv[]) { printf("%s\n", argv[0]); return argc; } that generates the following IR for the main function: ; Function Attrs: noinline nounwind optnone uwtable define i32 @main(i32, i8**) #0 { %3 = alloca i32, align 4 %4 = alloca i32, align 4 %5 = alloca i8**, align 8 store i32 0, i32*

David, sorry for this email but I noticed I made a mistake in the previous one. So I managed to compile llvm Debug with asserts release. I have used the following commands: cmake -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ENABLE_RTTI=ON -DLLVM_ENABLE_FFI=ON -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=ON .. cmake --build . -- -j8 && sudo cmake --build . --target install Once lli was

> > Hey Lang - does any of this look familiar to you? I'm afraid not: I know nothing about the interpreter. As far as I'm aware it's essentially abandonware. Alberto: The usual recommendation in these circumstances is to use a JIT class instead of the interpreter. You're using -force-interpreter though, so I assume you really want to use the interpreter for your use case?

Hi all, I am facing new problem with lli now. I am having a sample code in which I am doing malloc for two variables. If I compile the code with normal gcc the program runs without any warning of any sorts. If I compile the program to convert it into a bytecode file and then run it through lli it segfaults and the program aborts. This is the stack trace after execution. lli((anonymous

Hello, I've been working on turning PHP scripts into LLVM IR and I've gotten to the stage where I'm able to construct LLVM code that calls the PHP opcode handlers that I've pre-compiled to LLVM IR in the correct order. However, the PHP API is designed so that the handlers are not globally accessible (qualified by "static" in the C source). Instead they're supposed to

Hi David, In pretty sure that the crash is due to the instruction I have shared in my first email. In order to run pngpixel you just need libpng and zlib.. honest I thought that the .bc had Al the necessary. I'm happy to help you to reproduce it. As a curiosity, why do you think you cannot reproduce it? Unfortunately I won't be able to modify the interpreter soon.. anyway, I'll try to

I think I might have found a bug in the exection engine's 'constants folding'. Basically APInt's parameters are the wrong way round. Line 577 for lib/ExecutionEngine/ExecutionEngine.cpp :- case Instruction::PtrToInt: { GenericValue GV = getConstantValue(Op0); uint32_t PtrWidth = TD->getPointerSizeInBits(); GV.IntVal = APInt(PtrWidth,

Hi all, I have the condition of an ICmpInst in a variable called condition obtained doing GenericValue condition = getOperandValue(&I, SF); Now I would like to understand if the comparison was true or false. Is it correct to use condition.IntVal.getSExtValue() and if the value is 0 consider the true and if the value is -1 consider the condition false? I'm not sure because I was expecting

Is there documentation somewhere on how to call external functions from llvm? The only guide I found was this: http://www.gearleaf.com/blog/post/44, and it doesn't seem to be working for me. I have a function: llvm::GenericValue lle_X_create_number_object(llvm::FunctionType* ft, const std::vector<llvm::GenericValue>& args) { llvm_object_structure* result = new

Hi, All good points and jokes in your email :) My final goal is the get the value of %8 at runtime. So considering the program is called argv I would like to execute something like ./argv 22 and get the value of argv[0]. Is it possible? So far I have the address where the parameter at position 0 in store but I'd like to read the value and print it. I hope it is clear now Thanks again On

Hi all, I would like to understand if there is an efficient way to identify the instruction that "created" a specific variable. For example, define i32 @main() #0 { %1 = alloca i32, align 4 %2 = alloca %struct._IO_FILE*, align 8 %3 = alloca [40 x i8], align 16 store i32 0, i32* %1, align 4 %4 = call %struct._IO_FILE* @fopen(i8* getelementptr inbounds ([51 x i8], [51 x i8]*

The blog post I linked to implied that adding a symbol in the form lle_X_FUNCTIONNAME would allow you to call a function called FUNCTIONNAME. Is this not the case? On Thu, Aug 19, 2010 at 6:46 PM, <o.j.sivart at gmail.com> wrote: > You are adding the symbol as "lle_X_create_number_object" yet your error > message implies you have tried to lookup and use

Thanks Tim, I'll try to solve my problem ASAP, if I cannot maybe I'll some other clarifications. Thanks again On Sat, Mar 9, 2019, 06:03 Tim Northover <t.p.northover at gmail.com> wrote: > Hi Alberto, > > On Sat, 9 Mar 2019 at 05:50, Alberto Barbaro via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > i8* getelementptr inbounds ([7 x i8], [7 x i8]*

Hi Alberto, Can you please file a bug for it, with the test case attached (if you haven't already). Thanks, Ehud. On Sat, 1 Feb 2020 at 11:32 Alberto Barbaro via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Hi all, > just a gentle reminder :) Is there any update on this please? > > Happy to help in any way I can > > Alberto > > Il giorno ven 3 gen 2020 alle

You are adding the symbol as "lle_X_create_number_object" yet your error message implies you have tried to lookup and use "create_number_object". Can you provide the code for the lookup? On 20/08/2010, at 8:07 AM, Alec Benzer wrote: > Is there documentation somewhere on how to call external functions from llvm? The only guide I found was this:

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 =

Hello All File llvm/lib/ExecutionEngine/Interpreter/Execution.cpp (cvs rev 1.182) fails to compile with g++ 4.1.3 (Debian/Sid/AMD64 system) make[2]: Leaving directory `/usr/src/Lang/llvm/_Obj64/lib/Target' make[2]: Entering directory `/usr/src/Lang/llvm/_Obj64/lib/ExecutionEngine' make[3]: Entering directory `/usr/src/Lang/llvm/_Obj64/lib/ExecutionEngine/Interpreter' llvm[3]:

Aaron Gray wrote: > I think I might have found a bug in the exection engine's 'constants > folding'. > > Basically APInt's parameters are the wrong way round. > > Line 577 for lib/ExecutionEngine/ExecutionEngine.cpp :- > > case Instruction::PtrToInt: { > GenericValue GV = getConstantValue(Op0); > uint32_t PtrWidth =

[I assume you meant to send this to the list as well, not just me.] Begin forwarded message: Date: Wed, 3 Nov 2010 14:43:54 +0000 From: Salomon Brys <salomon.brys at gmail.com> To: Török Edwin <edwintorok at gmail.com> Subject: Re: [LLVMdev] Forcing the Interpreter segfaults I have build LLVM in debug mode. Here are the informations of the segfault : memcpy() at 0x7ffff6f6581e

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