Displaying 3 results from an estimated 3 matches for "replaceallusesafterthisinstruct".
2006 Oct 05
1
[LLVMdev] Extracting all BasicBlocks of a Function into new Function
...cond va_list. This seems a task for
a control flow graph based function checking the (possibly partial)
order between two Instructions, i.e. to check whether a Use is
situated after a CallInst to va_end.
Does such a method already exist in one of the transform or analysis
passes? Or does a replaceAllUsesAfterThisInstruction() method exist?
A related question: What's the easiest way to replace all uses of a
Value, but only within, say, a Function?
Kind regards,
Bram Adams
GH-SEL, INTEC, Ghent University (Belgium)
2006 Oct 05
0
[LLVMdev] Extracting all BasicBlocks of a Function into new Function
On Thu, 5 Oct 2006, Bram Adams wrote:
> Apparently, the problem is how to "rewind" the vararg-argument back to
> its first element when the second loop is reached, as it seems that the
> code just continues at position count and beyond, resulting in overflow.
>
> I'm not sure whether this code snippet is valid ANSI C, and if it is,
> one probably shouldn't use
2006 Oct 05
3
[LLVMdev] Extracting all BasicBlocks of a Function into new Function
Hi,
Chris Lattner wrote:
> All the non-vastart calls can be anywhere. va_end in particular codegens
> to a noop on all targets llvm currently supports, fwiw.
>
Things go well, except for the following (pathological?) C program:
int va_double_sum(int count,...){
int i,sum=0;
va_list ap;
va_start(ap,count);
for(i=0;i<count;i++){
sum+=va_arg(ap,int);
}
va_end(ap);