[LLVMdev] Extracting all BasicBlocks of a Function into new Function

Chris Lattner sabre at nondot.org
Tue Oct 3 14:58:15 PDT 2006

On Tue, 3 Oct 2006, Bram Adams wrote:
>> You'd have to change it to something like:
>> void foo(int X, ...) {
>>    P = va_start();
>>    bar(X, P);
>> }
>> void bar(int X, valist P) {
>>    use(P);
>> }
> Can the other va_...-intrinsics be used in bar as were the "P =
> va_start" in bar? The va_start probably is unnecessary now in bar,
> but where dus the va_end need to be: at the end of foo or of bar or
> doesn't it matter?

All the non-vastart calls can be anywhere.  va_end in particular codegens 
to a noop on all targets llvm currently supports, fwiw.



More information about the llvm-dev mailing list