cpu_info() should be at runtime, not translation time.
Created originally on Bitbucket by vext01 (Edd Barrett)
As discussed with @arigo In
rpython/jit/backend/x86/detect_feature.py there is a function
cpu_info() which collects information from the host cpu by executing binary code. Currently this is run at translation time, but actually it should be run at runtime.
Found last week, when looking into W^X.