X86: Fix Defs/Uses for insts that imp-def/imp-use both an A-register and EFLAGS.
X86: Fix Defs/Uses for insts that imp-def/imp-use both an A-register and EFLAGS.

This corrects a problem where x86 instructions that implicitly define/use both
an A-register (RAX, EAX, ..) and EFLAGS were declared as only defining/using
EFLAGS, because the outer "let Defs/Uses = [EFLAGS]" in the various multiclasses
overrides the "let Defs/Uses = [areg]" in BinOpAI.

The instructions deriving from BinOpAI were moved out of the "let Defs", and a
BinOpAI_FF class was created, for instructions that implicitly define and use
EFLAGS and the A-register (SBC, ADC).



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@182883 91177308-0d34-0410-b5e6-96231b3b80d8

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