[LLVMdev] A very basic doubt about LLVM Alias Analysis

[Duncan Sands]

Hi Ambika,

> to compile it to bitcode I give the following command :
> 
>   llvm-gcc -emit-llvm -c -o s.bc s.c
> 
> and then I run different alias analysis passes like -anders-aa, -basicaa 
> using following:
> 
>   opt -anders-aa -aa-eval -print-all-alias-modref-info  s.bc

alias analysis will work poorly if you don't run any optimizers.
The alias analysis passes assume that at least some basic optimizations
have been done.  Try compiling like this:

   llvm-gcc -emit-llvm -c -o s.bc s.c -O1

Ciao,

Duncan.