I/O port instructions on x86.  The specific code sequence is tailored to
the parameters and return value of the intrinsic call.
Added the ability for implicit defintions to be printed in the Instruction
Printer.
Added the ability for RawFrm instruction to print implict uses and
defintions with correct comma output.  This required adjustment to some
methods so that a leading comma would or would not be printed.

llvm-svn: 12782

that require the asmwriter to be extended (printing implicit uses before the
explicit operands)

llvm-svn: 12574

the size of the immediate and the memory operand on instructions that
use them. This resolves problems with instructions that take both a
memory and an immediate operand but their sizes differ (i.e. ADDmi32b).

llvm-svn: 11967

llvm-svn: 9321

llvm-svn: 7636

llvm-svn: 7568

llvm-svn: 7564

llvm-svn: 7537

llvm-svn: 7523

llvm-svn: 7510