[LLVMdev] [Fwd: Re: [Fwd: Regarding Inter Procedural Constant Propagation]]

Duncan Sands baldrick at free.fr
Mon Apr 25 01:55:23 PDT 2011

Hi Netra,

> I used the following commands on the program attached below:
>   llvm-gcc --emit-llvm main.c -c -o main.bc
>   opt -ipconstprop main.bc -o main1.bc

almost all LLVM optimization passes work poorly if you haven't run the
mem2reg pass first, so try at least
   opt -mem2reg -ipconstprop main.bc -o main1.bc

>   Also,when i use the following command:
>   opt -print-after-all main.bc
> The dumps generated dont include IPCP or Intraprocedural Const Propagation
> dumps.Why so?

Because you didn't tell opt to run that pass.

Ciao, Duncan.

More information about the llvm-dev mailing list