X86_64: Proper IMT fix

Unfortunately, 97184: X86_64: Pass 'hidden method index' in EAX wasn't
correct.  TargetReg(kInvokeTgt) is ALSO EAX, and so invoke-interface
blows up, since the saved index is overwritten by the generated code.

Change kInvokeTgt to EDI (the same as ARG0).

Change-Id: I4b1d260237274ee26b9283d810d1b74484ea59af
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
1 file changed