[LLVMdev] argpromotion not working

[Arvind Sudarsanam]

Hi all,

I have the following C code.

static int addp(int *c, int a,int b)
{
int x = *c + a + b;
return(x);
}

I want to replace *c with a scalar. So I tried the -argpromotion pass.
However, it fails to do anything to the resulting llvm file.

List of commands:
clang add.c -c -o add.bc
clang add.c -S -o add.ll
opt -argpromotion -stats add.bc -o add_a.bc
llvm-dis < add_a.bc > add_a.ll

Also, when I try to print the stats I get a message 
"Maximum CGSCCPassMgr iterations on one SCC"

Can anyone please let me know what I am missing here?

Thanks for all the help.

Regards
Arvind