[LLVMdev] argpromotion not working

Arvind Sudarsanam A.Sudarsanam at cputech.com
Fri Jun 18 13:21:53 PDT 2010

Hi all,

I have the following C code.

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

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.


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