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...2] //Old Instruction Value* Op0 = I->getOperand(0); Value* Op1 = I->getOperand(1); Value* V0 = new Value(Type::getInt16Ty(Op0->getContext()), Op0->getValueID()); Value* V1 = new Value(Type::getInt16Ty(Op1->getContext()), Op1->getValueID()); Instruction* newInst = BinaryOperator::CreateNSWAdd(V0, V1, "test"); errs() << "NewInst:\n" << *newInst << "\n"; But I get something like this: %test = add nsw i16 <badref>, <badref> ; <i16> [#uses=0] What I am doing wrong? Best, Douglas On Fri, Jan 21, 2011 at 8:25 PM, Nick...

...alue is pure base. Constructing one this way will never get you what you want. If the ValueID indicates an Instruction, go through Instruction to create one. > Value* V1 = new Value(Type::getInt16Ty(Op1->getContext()), > Op1->getValueID()); > Instruction* newInst = BinaryOperator::CreateNSWAdd(V0, V1, "test"); > errs() << "NewInst:\n" << *newInst << "\n"; > > > But I get something like this: > > %test = add nsw i16 <badref>, <badref> ; <i16> [#uses=0] The two instructions V0 and V1 you created were never...

...cting one this way will never get > you what you want. If the ValueID indicates an Instruction, go through > Instruction to create one. > > > Value* V1 = new Value(Type::getInt16Ty(Op1->getContext()), >> Op1->getValueID()); >> Instruction* newInst = BinaryOperator::CreateNSWAdd(V0, V1, "test"); >> errs() << "NewInst:\n" << *newInst << "\n"; >> >> >> But I get something like this: >> >> %test = add nsw i16 <badref>, <badref> ; <i16> [#uses=0] >> > > The two ins...

...> never get you what you want. If the ValueID indicates an > Instruction, go through Instruction to create one. > > > Value* V1 = new Value(Type::getInt16Ty(Op1->getContext()), > Op1->getValueID()); > Instruction* newInst = BinaryOperator::CreateNSWAdd(V0, V1, > "test"); > errs() << "NewInst:\n" << *newInst << "\n"; > > > But I get something like this: > > %test = add nsw i16 <badref>, <badref> ; <i16> [#uses=0] > > >...

...r get >> you what you want. If the ValueID indicates an Instruction, go through >> Instruction to create one. >> >> >> Value* V1 = new Value(Type::getInt16Ty(Op1->getContext()), >>> Op1->getValueID()); >>> Instruction* newInst = BinaryOperator::CreateNSWAdd(V0, V1, "test"); >>> errs() << "NewInst:\n" << *newInst << "\n"; >>> >>> >>> But I get something like this: >>> >>> %test = add nsw i16 <badref>, <badref> ; <i16> [#uses=0] >&g...

...> ‘llvm::Instruction’:", "Instruction.h:50: note: virtual llvm::Instruction* > llvm::Instruction::clone(llvm::LLVMContext&) const" > An add or sub should be a BinaryOperator, if memory serves me correctly. Looking at mainline doxygen, there's a whole bunch of CreateNSWAdd, CreateNSWMul, etc. methods. It's one of those that you want. -- John T. > Also i have used BinaryOperator::create(), but it gives error that there is > no function called create(). > > Thanks again for your reply. > > > John Criswell-2 wrote: > >> help__me_p...

On 21 January 2011 12:56, Douglas do Couto Teixeira < douglasdocouto at gmail.com> wrote: > Hello guys, > > I wonder how I can change the type of an integer variable. For instance, > given the instruction "%3 = add i32 %1, %2" I would like to alter the > instruction to "%3 = add i16 %1, %2". Is there any way to do this? > No. Instead you create a new

Thanks for reply. I have used AllocaInst, it's working but i think it's only for allocating some memory for new variable. And CallInst creates a call instruction. I am looking for creating a add or sub instruction. I used function instruction(), which gives me error "error: cannot allocate an object of abstract type ‘llvm::Instruction’" and also "Instruction.h:28: note:

Hello guys, I wonder how I can change the type of an integer variable. For instance, given the instruction "%3 = add i32 %1, %2" I would like to alter the instruction to "%3 = add i16 %1, %2". Is there any way to do this? Best wishes, Douglas -------------- next part -------------- An HTML attachment was scrubbed... URL: