llvm dev - Apr 2010 - [LLVMdev] machine pass

Hi,

LLVM documentation is not clear. Is it possible to write a machine pass?
I am trying to insert some machine code before the return instruction.
ideally, I'd like a pass that runs the last one before generating assembly.
How can this be done?

Thank you,
Dan

 		 	   		  
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Dan,
 Please look at llvm\lib\Target\X86\X86FloatingPointRegKill.cpp as an example on
how to write a Machine pass.

In the backend that you want to add the pass to, modify the
<X>TargetMachine.cpp file and add the pass to addPreEmitPass()

Micah

From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of dan mihai
Sent: Wednesday, April 28, 2010 2:47 PM
To: llvmdev at cs.uiuc.edu
Subject: [LLVMdev] machine pass

Hi,

LLVM documentation is not clear. Is it possible to write a machine pass?
I am trying to insert some machine code before the return instruction.
ideally, I'd like a pass that runs the last one before generating assembly.
How can this be done?

Thank you,
Dan

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