llvm dev - Sep 2002 - [LLVMdev] #uses

When I use the llvm to print out the code, it actually gives
out the number of uses for each variable, for example, I get
lines like this:

 %S.i = alloca %struct.SimpleStruct          ;
<%struct.SimpleStruct*> [#uses=3]

or this

%cast216.i = getelementptr %struct.SimpleStruct* %S.i, long 0,
ubyte 0          ; <int*> [#uses=1]

My question is how the program knows about the number of uses.
If I want to check all the future uses of this variable, say
%S.i. Is there a way that I can directly find the uses of this
variable? Or I have to iterate over the function, inspect all
the instructions and ompare all the operands of each
instruction to see if they are the same?

Thanks,
xiaodong

> My question is how the program knows about the number of uses.
> If I want to check all the future uses of this variable, say
> %S.i. Is there a way that I can directly find the uses of this
> variable? Or I have to iterate over the function, inspect all
> the instructions and ompare all the operands of each
> instruction to see if they are the same?
See:
http://llvm/docs/ProgrammersManual.html#iterate_chains

-Chris

http://llvm.cs.uiuc.edu/
http://www.nondot.org/~sabre/Projects/