similar to: [LLVMdev] How to Load a Value?

Zheng Wang <jason.wangz at gmail.com> writes: > I have a problem of generating a load instruction. The LLVM bytecode is: > > ------------------------ > entry: > ... > %2 = call i32 (...)* @atoi(i8*%1) nounwind > /*<- Insertpos*/ > ... > > -- > bb1: > .. > %5 = icmp sgt i32 %2, %i.0 > ... > ----------------- > > > Now I have >

Hi , I am using LLVM for my Post Graduate course project on Optimization. I am trying to do some insrtumentation to the bytecode.I 've been going through your Instrumentation code for the past few days in /llvm/lib/Transforms/Instrumentation folder and finally found two ways of instrumentation : 1) injecting LLVM bytecode instructions 2) calling an external C function. I am trying both and

Hi folk, I get the following stack trace and do have any clue how to fix the problem. 0 opt 0x087ecc99 1 opt 0x087ed265 2 0xb7f6a400 __kernel_sigreturn + 0 3 opt 0x086d4198 llvm::LeakDetector::addGarbageObject(llvm::Value const*) + 29 4 opt 0x0872945f llvm::Instruction::Instruction(llvm::Type const*, unsigned int,

Hi, I want to access an array in my instrumentation code. For example: GlobalVariable: int *counter; //counter the number of load/store operations in run-time int *counterArray; //record the load/store addresses //increase the counter if a load/store is performed std::vector<Constant *>index(2); index[0] = Constant::getNullvalue(Type:getInt32Ty(Context)); index[1] =

Thanks for your reply. After I change Cstr to gI, it compiled successfully. Thanks again. Another question is for constructing getelementpt. // C code char gStrA[10] = "test str"; // here is Global variable,gStrA and initializer "test str" char gStrB[10]= "test str2"; main(){ int = i; char *pGVars[20]; // here, the pGVar is for storing the address of each

Hi, I am trying to figure out the best way to add some extra metadata to the store and load llvm-ir instructions: The metadata content is a 'Value*' expression representing a side channel, containing dependency information that is used to help the Scoped Alias Analysis. Optimizations that don't know about this side channel can safely drop it, where the only effect would be on the

Hi Tan Guangming, > I want to access an array in my instrumentation code. For example: > > GlobalVariable: > int *counter; //counter the number of load/store operations in run-time > int *counterArray; //record the load/store addresses strictly speaking these are not arrays, they are pointers. Also, you have written them in some kind of C-style idiom. What are the declarations

Hello, How to check whether a value object is within a particular basic block or not. I have the following LLVM bytecode: ------------------------ entry: ... %2 = call i32 (...)* @atoi(i8*%1) nounwind ... -- bb1: .. %5 = icmp sgt i32 %2, %i.0 ... ----------------- Here I got the corresponding pointer of the Value object of *%2*. How can I check whether it is defined in *entry* or

Thanks, Shahid. It is fixed now. On Fri, Apr 17, 2015 at 8:50 PM, Shahid, Asghar-ahmad < Asghar-ahmad.Shahid at amd.com> wrote: > Hi zhi, > > > > You have to also pass the value type to getDecalaration() API such as > > > > Value* sqrtv = Intrinsic::getDeclaration(M, Intrinsic::x86_sse2_sqrt_pd, > v->getType()); > > > > Regards, > >

I recently began hacking around with my first LLVM pass. The big picture is that I would like to insert function calls for each instruction type, and pass some parameters based on the instruction type. Then I will link the output to some C file that implements those functions. Things were going well until I started trying to make function calls with a pointer as a parameter. For example, I would

Hello; Thanks to Eli for the pointer to the ConstantDataArray::getString() fucntion. Now I am trying to declare a global char array with the content "hi" and call a function "print" (which takes a char pointer and return an insteger. I am doing the following in the code - Function Creation: PointerType* array = PointerType::get(IntegerType::getInt8Ty(getGlobalContext())

Now I have an address that present in a unsigned long address like the following format: Value* addr = CONST(0xc0008000) But I do not know how to read the data from the above addr varaible. I tried the following three kind of code: 1. Code: Value* addr = CONST(0xc0008000); Value* data = new LoadInst(addr, "", false, bb); Error: Segmentation fault 2. Code(

I am trying to parse LLVM IR from a bit code file. I went through the following steps. hello.cpp #include <iostream> int main() { std::cout << "Hello world!" << "\n"; return 0;} dump.cpp #include <llvm/IR/Module.h>#include <llvm/IRReader/IRReader.h>#include <llvm/IR/LLVMContext.h>#include <llvm/Support/SourceMgr.h> using

于 2011/5/18 14:29, Duncan Sands 写道: > Hi Tan Guangming, > >> I want to access an array in my instrumentation code. For example: >> >> GlobalVariable: >> int *counter; //counter the number of load/store operations in run-time >> int *counterArray; //record the load/store addresses > strictly speaking these are not arrays, they are pointers. Also, you have

Hi Guangming Tan, >>> GlobalVariable: >>> int *counter; //counter the number of load/store operations in run-time >>> int *counterArray; //record the load/store addresses >> strictly speaking these are not arrays, they are pointers. Also, you have >> written them in some kind of C-style idiom. What are the declarations in >> LLVM IR? > const Type

Zheng Wang wrote: > Hello, > > How to check whether a value object is within a particular basic block or not. > There is a much simpler way to do this. Assuming that Value * pb holds the pointer to the value of %2, you do the following: 1) Check to see if %2 is an instruction (use dyn_cast<Instruction>(pb) and see if the result is NULL). If it's not an instruction,

Hi Michael, > Now I have an address that present in a unsigned long address like the > following format: > Value* addr = CONST(0xc0008000) what is the type of addr? For that matter, what is CONST - what does it do? Ciao, Duncan. > > But I do not know how to read the data from the above addr varaible. I > tried the following three kind of code: > 1. Code: >

Hi, I got a problem when I am trying to insert a call function with pointer arguments. The function C proto-type is the following, void stat_func(char *); >ConstantArray *Cstr = dyn_cast<ConstantArray>(gI->getInitializer()); ...... >Function *exFunc = M->getOrInsertFunction("stat_func", Type::VoidTy, PointerType::get(Type::SByteTy),0); >std::vector<Value*>

Duncan Sands <baldrick <at> free.fr> writes: > > Hi Anshul, > > > I am creating a pass that will pass loaded value by load instruction to an > > external function. > > I don't know how to do it.Please Help. > > your question is too vague for anyone to be able to help you. Add details, > for example provide the code for your pass. > >

Hi Eli, Mon Ping, > In ISO/IEC WG14 n1169 on the C extensions to support embedded > processors, any two address spaces must be disjoint, must be > equivalent, or must be nested. Ah, that standard is a lot clearer on this subject than the DSP-C one I read was. > As Eli indicated, the actual relationship is platform specific depending on > what makes the most sense for