[LLVMdev] install and add backend to llvm.

[Teklu kebede]

Thanks Raghu

It is working fine now!!!!

I change the name of the instruction "add" to "newadd" in 
root/llvm/lib/Target/XCore/XCoreInstrInfo.td. Then I go to objllvm/lib/Target/XCore/

then I run

$ make
$ cd
$ cd objllvm
$ sudo make install

I can see the new name *newadd" in the assembly code now but Is this the shortest way?
I mean I change only one file :)

thanks again!!!!

--- On Tue, 1/25/11, Raghu Prabhakar <raghu at cs.ucla.edu> wrote:

From: Raghu Prabhakar <raghu at cs.ucla.edu>
Subject: Re: [LLVMdev] install and add backend to llvm.
To: "Teklu kebede" <tek_phy at yahoo.com>
Cc: llvmdev at cs.uiuc.edu
Date: Tuesday, January 25, 2011, 2:51 AM

Have you added the $LLVM_INSTALL_DIR/bin to your PATH environment variable?

Regarding changing a particular backend, check the documentation in 
http://llvm.org/docs/WritingAnLLVMBackend.html
http://llvm.org/docs/CodeGenerator.html

A few LLVMdev meetings have good talks to give you a good enough idea.
http://llvm.org/devmtg/

Cheers,
Raghu.

----- Original Message -----
From: "Teklu kebede" <tek_phy at yahoo.com>
To: llvmdev at cs.uiuc.edu
Sent: Monday, January 24, 2011 6:13:37 PM
Subject: [LLVMdev] install and add backend to llvm.


Hi I am new to llvm and Linux (I am using ubuntu 10) 

My aim is to add backend to llvm. 

I install llvm using 

$ sudo apt-get install llvm 

and I am able to understand what I read about Writing an LLVM Compiler Backend. 

I have seen the assembly codes of the targets on llvm using llc. What I need now is to change some of the TableGen files of one of the target like SparcInstrInfo.td. So I uninstall llvm and I try to build it manually as specified in Getting Started with the LLVM System. http://llvm.org/releases/2.7/docs/GettingStarted.html. 

The building finish with out error (I didn\t include LLVM Test Suite ). 
I use default for all of the options!! 

But when I use all of tools for example 
$ lli hello.bc 

I get 

The program 'lli' is currently not installed. You can install it by typing: 
sudo apt-get install llvm-2.7-runtime 

Any help please. 

I just need to see the effect of a changes in TableGen files, when i print the assembly code. 
like name of register, or name of Instruction. 

thanks 




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