search for: createload

...amedValues[Name]; return V ? V : ErrorV("Unknown variable name"); } It means that we can access value of arguement directly. However, in llvm.org/demo and the chapter 6 of tutorial, it deals with arguemnt: 1. allocate memory for arguement 2. then store the arguemnt into the memory. 3. CreateLoad() to load the arguement when accessing the value of arguement. I have several problems: Which way should I follow to get the vale of arguement? When I tried to use CreateLoad(arguement), the program gives a segmentation error. Does this result from the wrong type of argument, unsuitable to be the...

...s, > > First i converted the void * to int* and then did FPToSI...then did SHL...( > because CreateShl only accepts integers... i pointer casted it to int64 type > first)... Below is the code snippet.... > > > lhs = mBuilder.CreateStructGEP(firstArg, 0); > lhs = mBuilder.CreateLoad(lhs); > lhs = mBuilder.CreatePointerCast(lhs, PointerType::get( > mBuilder.getInt64Ty(), 0)); > int typelhs = getValueType(lhs); > rhs = mBuilder.CreateStructGEP(secondArg, 0); > rhs = mBuilder.CreateLoad(rhs); > rhs = mBuilder.CreatePointerCast(rhs...

...st, false); Function *fun= cast<Function> ( module->getOrInsertFunction("fun", funType)); BasicBlock * block = BasicBlock::Create(Context, "mainBlock", fun); IRBuilder<> builder(block); Function::arg_iterator itr = fun->arg_begin(); builder.CreateLoad(itr); Value *result = ConstantFP::get(Type::getDoubleTy(getGlobalContext()), 1.0); builder.CreateRet(result); vector<GenericValue> args; ExecutionEngine *e = EngineBuilder(module).create(); outs()<<*module<<"\n"; outs().flush(); return 0; }...

....SetInsertPoint(LLVMBB, I); // The following line looks to me like it would have a chance of loading either // address 5, or else immediate value 5. Unfortunately, it does neither. It compiles // but crashes at runtime, that the type of the operand is incompatible Instruction *newI=Builder.CreateLoad(5,""); // I also tested this, just to do a little sanity check. It also compiles then // crashes, for the obvious reason that the operand is a register, but an address // or an immediate value is expected. //Instruction *newI=Builder.CreateLoad(I->getOperand(1),"");...

...9 at gmail.com>> wrote: Hi James, First i converted the void * to int* and then did FPToSI...then did SHL...( because CreateShl only accepts integers... i pointer casted it to int64 type first)... Below is the code snippet.... lhs = mBuilder.CreateStructGEP(firstArg, 0); lhs = mBuilder.CreateLoad(lhs); lhs = mBuilder.CreatePointerCast(lhs, PointerType::get( mBuilder.getInt64Ty(), 0)); int typelhs = getValueType(lhs); rhs = mBuilder.CreateStructGEP(secondArg, 0); rhs = mBuilder.CreateLoad(rhs); rhs = mBuilder.CreatePointerCast(rhs, PointerType::get(...

...sible to access the values (virtual registers) direclty, but you may need to construct SSA form by yourself. > > However, in llvm.org/demo and the chapter 6 of tutorial, it deals with > arguemnt: > 1. allocate memory for arguement > 2. then store the arguemnt into the memory. > 3. CreateLoad() to load the arguement when accessing the value of arguement. > > I have several problems: > Which way should I follow to get the vale of arguement? If you do not want to construct SSA from by yourself, you probably should follow this way. You can schedule the "mem2reg"[1] after...

Hi, I'm pursuing M.Tech course. As a part of the project work i'm using LLVM as back-end. My project area is "Enhancing the performance of V8 javascript engine using LLVM as a back-end". Now i'm writing code for shift left(SHL) operator. I had my own Value Structure .. it's like this Struct Value { void *val ; char type; } The "char type" holds

...s, > > First i converted the void * to int* and then did FPToSI...then did SHL...( > because CreateShl only accepts integers... i pointer casted it to int64 type > first)... Below is the code snippet.... > > > lhs = mBuilder.CreateStructGEP(firstArg, 0); > lhs = mBuilder.CreateLoad(lhs); > lhs = mBuilder.CreatePointerCast(lhs, PointerType::get( > mBuilder.getInt64Ty(), 0)); > int typelhs = getValueType(lhs); > rhs = mBuilder.CreateStructGEP(secondArg, 0); > rhs = mBuilder.CreateLoad(rhs); > rhs = mBuilder.CreatePointerCast(rhs...

...>) %5 = load %Foo*, %Foo** %_var_y0 %6 = getelementptr inbounds %Foo, %Foo* %5, i32 0, i32 0 %7 = load %_VtableFoo*, %_VtableFoo** %6 %8 = getelementptr inbounds %_VtableFoo, %_VtableFoo* %7, i32 0, i32 0 %9 = load void (%Foo*, i32)*, void (%Foo*, i32)** %8 However, the builder->CreateLoad instruction corresponding to the line with %9 returns null: llvm::Function *calleeMethod = llvm::dyn_cast<llvm::Function>(builder->CreateLoad(calleeMethodPtr)); So if I then try to execute the following builder->CreateCall function I end up with a segmentation fault since calleeMe...

...; // The following line looks to me like it would have a chance o! f loading > either > // address 5, or else immediate value 5. Unfortunately, it does neither. It > compiles > // but crashes at runtime, that the type of the operand is incompatible > Instruction *newI=Builder.CreateLoad(5,""); > > // I also tested this, just to do a little sanity check. It also compiles > then > // crashes, for the obvious reason that the operand is a register, but an > address > // or an immediate value is expected. > //Instruction *newI=Builder.CreateLoad(I...

...true); Constant* sprintf = mod->getOrInsertFunction("sprintf", sprintfFT); Now, I got stuck to create teh function call for sprintf. I didn't it like the following: Value* str = builder.CreateGlobalStringPtr("str", ""); Value* data = builder.CreateLoad(a); //load a, b, or c Value* buf = builder.CreateLoad(buffer); builder.CreateCall3((value*)sprintf, buf, str, data); I want to test the sprintf function before adding the offset, but it didn't work. The error information is "llvm.sys:PrintStackTrace(_IO_FILE)". Any help will b...

...d? For me its the same result on LLVM 6.0 and 7. Alternatively add BYTE PTR [rsi+rdi*1],0x1 adc BYTE PTR [rsi+rdi*1],0x0 would work as well. Thank you very much! Regards, Marc -> Below now is the full llvm IR pass code // vvv same code before both variants LoadInst *PrevLoc = IRB.CreateLoad(AFLPrevLoc); PrevLoc->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None)); Value *PrevLocCasted = IRB.CreateZExt(PrevLoc, IRB.getInt32Ty()); LoadInst *MapPtr = IRB.CreateLoad(AFLMapPtr); MapPtr->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None)); V...

Thank you for your answer. But there is still a problem. You seem correct about how to define a constant operand. So I added it into my code, like so: Builder.SetInsertPoint(LLVMBB, I); Constant *C = ConstantInt::get(APInt(32, 5, false)); Instruction *newI=Builder.CreateLoad(C,""); It compiles. But it still aborts at runtime with a complaint that the type is not right. This leads me to think that immediate loads are not generated with the CreateLoad instruction? Another person's reply to my question indicated that a way to avoid inserting the immedia...

...],0x1 >   adc    BYTE PTR [rsi+rdi*1],0x0 >  would work as well. > > Thank you very much! > > Regards, > Marc > > -> Below now is the full llvm IR pass code > > // vvv same code before both variants > LoadInst *PrevLoc = IRB.CreateLoad(AFLPrevLoc); > PrevLoc->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None)); > Value *PrevLocCasted = IRB.CreateZExt(PrevLoc, IRB.getInt32Ty()); > >  LoadInst *MapPtr = IRB.CreateLoad(AFLMapPtr); > MapPtr->setMetadata(M.getMDKindID("no...

...std::vector<Type*> FooArgs; FooArgs.push_back(IRB.getInt64Ty()); Value *FooFunction = M.getOrInsertFunction(std::string("foo"), FunctionType::get(IRB.getVoidTy(), ArrayRef<Type*>(FooArgs), false)); IRB.CreateCall(FooFunction, IRB.CreateLoad(LenAlloca)); I want to create a similar call, but to the pointer of foo ("foo_ptr" is defined as "(void) *foo_ptr (int)"). In C code, I would just call "foo_ptr(var)", and it would just work. But, replacing the function name with the name of the function pointer, in t...

...ething like this (paraphrasing from lib/Transfoms/Instrumentation/AddressSanitizer.cpp): // call __asan_allocas_unpoison(uptr top, uptr bottom); // NB "top" here means lowest address and "bottom" means highest! IRB.CreateCall( AsanAllocasUnpoisonFunc, { IRB.CreateLoad(DynamicAllocaLayout), IRB.CreatePointerToInt(SaveRestoreInst->getOperand(0), IntptrTy) } ); I think the problem is that the operand to stackrestore is the new native sp register value to restore, and this code is assuming that that will be a higher address than all the allocas that...

Hi all, I have recently encountered a problem when creating LLVM IRs. I am wondering if there is a standard or easy way to create a load from a certain register? For example, CreateLoad(rbp, NAME). Thanks, Chen -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20131213/ec277276/attachment.html>

...d (i32) slot being stored in the first (i8*). I've added ::dump() calls where the CreateStore is, and this is what I get: { i8*, i32 } { i8* @FixnumClass, i32 32 } ; for value @foo = external global { i8*, i32 } ; for ptr Even more bizarrely trying to replace the getGlobal call with builder.CreateLoad(val) results in what has been stored in the first (i8*) slot being loaded correctly, but the second (i32) getting garbage out despite the correct value being stored in memory. Dump call there reports the @foo pointer identically. This is using LLVM 4.0.0 Just so I'm not leaving anything out,...

...ion/AddressSanitizer.cpp): > > // call __asan_allocas_unpoison(uptr top, uptr bottom); > // NB "top" here means lowest address and "bottom" means highest! > > IRB.CreateCall( > AsanAllocasUnpoisonFunc, > { > IRB.CreateLoad(DynamicAllocaLayout), > IRB.CreatePointerToInt(SaveRestoreInst->getOperand(0), IntptrTy) > } > ); > > I think the problem is that the operand to stackrestore is the new > native sp register value to restore, and this code is assuming that > that...

...ents. My code: Instruction* InstructionVisitor::incrementGlobalKey(Instruction* I) { IRBuilder<> Builder(I->getContext()); Builder.SetInsertPoint(I->getNextNode()); GlobalVariable* key = I->getModule()->getNamedGlobal("globalKey"); if (key) { LoadInst* load = Builder.CreateLoad(key); Value* inc = Builder.CreateAdd(load, Builder.getInt64(1)); StoreInst* store = Builder.CreateStore(inc, key); return store; } return I; } Instruction* InstructionVisitor::print(Instruction* I, const char* text, Value* arg1, Value* arg2, Value* arg3, Value* arg4) { Function* printfFn = I->g...