llvm dev - Mar 2013 - [LLVMdev] code gen variable mapping

Hi all, 

Since variables in the source code are renamed in the IR, I wanted to ask you
how and where this mapping is done in Clang.
I am interested in converting the variable names in some C strings to the one in
the IR.
For example if at a certain point of the program I have a string  like
"x>0" I want to change it in "%x>0" (I already
implemented a parser to recognize the identifiers so I only need to translate
the name).
If you have any suggestion in how to do it easily (like if there is already a
data structure or a method to call) it will be really appreciated.

Thank you in advance,

Niko

Hi Niko,
> Since variables in the source code are renamed in the IR, I wanted to ask
you how and where this mapping is done in Clang.
> I am interested in converting the variable names in some C strings to the
one in the IR.
> For example if at a certain point of the program I have a string  like
"x>0" I want to change it in "%x>0" (I already
implemented a parser to recognize the identifiers so I only need to translate
the name).
> If you have any suggestion in how to do it easily (like if there is already
a data structure or a method to call) it will be really appreciated.
this is essentially hopeless.  Most names in LLVM IR have no meaning, they are
just there to make debugging easier: they can be removed altogether and all will
still work fine.  Even if the front-end is kind enough to set a name, optimizers
can change them.  Why do you want this name mapping?  Maybe you should be using
debug info instead?

Ciao, Duncan.