search for: getelmentptr

...r operand is "null" and the others are numbers like "1") then it will be turned into a number by the optimizers. I think my case is stated above among your answer. http://nondot.org/sabre/LLVMNotes/SizeOf-OffsetOf-VariableSizedStructs.txt There is a brief document about using getelmentptr trick above. And I was wondering something similar to this case. %Size = getelementptr %T* null, int 1 %SizeI = cast %T* %Size to uint I understood that for this case, getelementptr will be collapsed to a number during optimization. It is also explained in the brief document above. I didn'...

Hi Journeyer, > I've got a question about getelementptr. > > I've been told that getelementptr is evaluated in compile-time NOT in run-time. this is impossible if the arguments are not constants. If they are constant, then the optimizers will turn a getelementptr instruction into a getelementptr constant expression (http://llvm.org/docs/LangRef.html#constant-expressions). Even

Hello List, I've got a question about getelementptr. I've been told that getelementptr is evaluated in compile-time NOT in run-time. So I tested it with clang web compiler below. http://llvm.org/demo/index.cgi But with LTO nor Standard, neither one optimize getelementptr out. Does getelementptr get evaluated in compile-time? Or doesn't it get executed in run-time? (I believed so.