How do we disable the particular opt in llvm ?

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#1

Hi Everyone,

How do we particular disable optimization in llvm with -O2 enabled?

for example
“Interprocedural Sparse Conditional Constant Propagation”

Thank you
~Umesh

#2

Hey Umesh!

How are you running the optimization passes here? Using the command line with opt? Using clang? Or are you using a PassManagerBuilder?

Cheers,
-Neil.

#3

Hi Neil,
I’m using clang here.

Umesh

#4

Not all passes have an “off switch”. As far as I can tell, (IP)SCCP does not have one.

We can, probably should, add those to all passes though.