Re: PROBLEM: compilation issue, inline assembly arch/x86/kvm/emulate.cfails at -O0

[H. Peter Anvin]

On 11/14/2012 11:45 AM, Blower, Melanie wrote:
> [1.] gcc -O0 assembly arch/x86/kvm/emulate.c gets compilation failure -- incorrect register restrictions
> [2.] Full description of the problem/report:
> I'm trying to compile this file at -O0, but gcc chokes in register allocation at the inline assembly.
>
> In the ordinary Linux build, this file compiles with gcc at -O2, without compilation errors.

Compiling with -O0 is not really expected to work (although -O1 *is*), 
although what you are reporting is an actual bug ("+a" : "a" should
either be "+a" or "=a" : "a").

	-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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