When trying to run wine.git's comctl32 imagelist test with valgrind svn I get
the following error:

vex x86->IR: unhandled instruction bytes: 0xF 0xAE 0xA 0xE9
==31875== valgrind: Unrecognised instruction at address 0x7BC62C23.
==31875== Your program just tried to execute an instruction that Valgrind
==31875== did not recognise.  There are two possible reasons for this.
==31875== 1. Your program has a bug and erroneously jumped to a non-code
==31875==    location.  If you are running Memcheck and you just saw a
==31875==    warning about a bad jump, it's probably your program's fault.
==31875== 2. The instruction is legitimate but Valgrind doesn't handle it,
==31875==    i.e. it's Valgrind's fault.  If you think this is the case or
==31875==    you are not sure, please let us know and we'll try to fix it.
==31875== Either way, Valgrind will now raise a SIGILL signal which will
==31875== probably kill your program.

Wine tells the following instruction is the cause of it:

701         __asm__ __volatile__( "fxrstor %0" : : "m" (*state) );