[llvm-dev] Instrumenting LLVM IR

[Ashwin Rajendran via llvm-dev]

Hi,


I am writing an LLVM Pass in which i need to manipulate code.


I need to delete particular lines of code, insert new lines of code and manipulate code . Can anyone guide me on how to go about this?


In particular I would like to know how to do the following things:


1. How to do I write an LLVM Pass which knows which particular lines of code i need to delete?

2. How do i insert a line of code, for example inserting a function call like "foo(a)" , and how do i specify which place to insert this function call?

3. How do i manipulate existing code, such as for example changing "foo(a)" to "foo(b)"?


Thanks and Regards,

Ash

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