[PATCH] MC: Split the x86 asm matcher implementations by dialect

[Jim Grosbach]

I believe Daniel's right that WasOriginallyInvalidOperand is unused and can be nuked in MatchAndEmitIntelInstruction().

Do we already have testcases for the various other forms? I'm specifically thinking of the retry loop "for (unsigned Size : MopSizes) {".

================
Comment at: test/MC/X86/intel-syntax-ambiguous.s:11
@@ +10,3 @@
+inc word ptr [eax]
+inc byte ptr [eax]
+// CHECK-NOT: error:
----------------
We should check the encoding of these instructions, not just that we can parse them without error.

http://reviews.llvm.org/D4747