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cb7cb2864e
In __emulate_1op_rax_rdx, we use "+a" and "+d" which are input/output constraints, and *then* use "a" and "d" as input constraints. This is incorrect, but happens to work on some versions of gcc. However, it breaks gcc with -O0 and icc, and may break on future versions of gcc. Reported-and-tested-by: Melanie Blower <melanie.blower@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/B3584E72CFEBED439A3ECA9BCE67A4EF1B17AF90@FMSMSX107.amr.corp.intel.com Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Marcelo Tosatti <mtosatti@redhat.com>