[LLVMdev] "Refactoring" Basic Blocks into a new function

[Vikram Adve]

On Apr 19, 2005, at 8:39 PM, Evan Jones wrote:

> I have two very specific questions about LLVM, but first let me give 
> you the general overview of what I am trying to achieve. I have some 
> section of a function that I want to replace with a function call to a 
> brand new function. For example, I want to take the following 
> function:
>
> function foo:
> 	code A
> <--- CUT
> 	code B
> <--- CUT
> 	code C
>
> and (approximately) convert it into:
>
> function foo:
> 	code A
> 	call label
> 	code C
>
> function label:
> 	code B
>
> I think I have a pretty good idea of how to do this (BasicBlock::split 
> really helps!), but I have a few specific questions:


Evan,

Have you looked at ExtractCodeRegion() and its siblings in 
include/llvm/Transform/Utils/FunctionUtils.h?  It seems to be what you 
need.

--Vikram
http://www.cs.uiuc.edu/~vadve
http://llvm.cs.uiuc.edu/