[LLVMdev] [cfe-dev] Compiling Multiple Files

[James Molloy]

Hi Ryan,

I see. Well, that shouldn't be an issue. If you link the bitcode files together with llvm-link you can then do several things:

(1) Run clang on it as you normally would with -O3 for maximum inlining
(2) Run 'llc' manually with -O3 and LTO, which will do the maximum link time optimisations.
(3) Run 'opt' manually with -O3, LTO which will produce another bitcode file, which you can then again give to Clang to codegen.

Cheers,

James
________________________________________
From: Ryan Taylor [ryta1203 at gmail.com]
Sent: 12 March 2012 18:25
To: James Molloy
Cc: llvmdev at cs.uiuc.edu
Subject: Re: [cfe-dev] Compiling Multiple Files

James,

  Sure. I want to inline functions in a C program that has no external node, or "main". So the "top" function is not main and there does not exist a main in the file.

Thanks.

On Mon, Mar 12, 2012 at 11:23 AM, James Molloy <James.Molloy at arm.com<mailto:James.Molloy at arm.com>> wrote:
Hi Ryan,

> Do you know if it's possible to inline functions without an external node?

Sorry, I don't know to what you're referring here. Could you please rephrase? what do you mean be "external node"?

Cheers,

James
________________________________________
From: Ryan Taylor [ryta1203 at gmail.com<mailto:ryta1203 at gmail.com>]
Sent: 12 March 2012 17:58
To: James Molloy
Cc: llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>
Subject: Re: [cfe-dev] Compiling Multiple Files

I believe it might actually. Do you know if it's possible to inline functions without an external node? It doesn't appear to be so.

On Mon, Mar 12, 2012 at 1:24 AM, James Molloy <James.Molloy at arm.com<mailto:James.Molloy at arm.com><mailto:James.Molloy at arm.com<mailto:James.Molloy at arm.com>>> wrote:
Hi Ryan,

I would just compile to multiple IR files then link them together with llvm-link.

Would that work for you?

Cheers,

James

From: cfe-dev-bounces at cs.uiuc.edu<mailto:cfe-dev-bounces at cs.uiuc.edu><mailto:cfe-dev-bounces at cs.uiuc.edu<mailto:cfe-dev-bounces at cs.uiuc.edu>> [mailto:cfe-dev-bounces at cs.uiuc.edu<mailto:cfe-dev-bounces at cs.uiuc.edu><mailto:cfe-dev-bounces at cs.uiuc.edu<mailto:cfe-dev-bounces at cs.uiuc.edu>>] On Behalf Of Ryan Taylor
Sent: 09 March 2012 19:32
To: cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu><mailto:cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu>>
Subject: [cfe-dev] Compiling Multiple Files

Clangers,

 What's the best way to compile multiple files in one LLVM IR file? It doesn't appear that clang supports the gcc -combine feature.

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