linux-kernel - Re: inline asm semantics: output constraint width smaller than input

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Date:	Fri, 23 Jan 2009 20:52:37 +0200
From:	Török Edwin <edwintorok@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	LLVM Developers Mailing List <llvmdev@...uiuc.edu>
Subject: Re: inline asm semantics: output constraint width smaller than input

On 2009-01-23 20:30, Ingo Molnar wrote:
> * Török Edwin <edwintorok@...il.com> wrote:
>
>   
>> Having said that, llvm-gcc is not yet able to compile the full Linux 
>> kernel on its own [for example the boot code, due to asm(".code16gcc")], 
>> but with LLVM 2.4 it was possible to build "arch=UM", and "arch=X86" (by 
>> using gcc to build the bootcode). I'd like LLVM 2.5 to be able to build 
>> the kernel, so I'll file bugs for llvm/kernel depending on where the 
>> problem is.
>>     
>
> Could we get LLVM folks on the Cc: and see how difficult it would be to 
> fix this on the LLVM side? Asm constraints are used all around the place 
> and different input/output types are very common.

I've added LLVMDev to Cc.
Your first post to the list may take a little longer to reach it (first
post is moderated by listmaster, no subscription required).

[For those who missed the initial conversation, see:
http://llvm.org/bugs/show_bug.cgi?id=3373#c9]

Best regards,
--Edwin
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