Jim Grosbach a8a8067dec Remove redundant Thumb2 ADD/SUB SP instruction definitions. ...

Unlike Thumb1, Thumb2 does not have dedicated encodings for adjusting the
stack pointer. It can just use the normal add-register-immediate encoding
since it can use all registers as a source, not just R0-R7. The extra
instruction definitions are just duplicates of the normal instructions with
the (not well enforced) constraint that the source register was SP.

llvm-svn: 134114

2011-06-29 23:25:04 +00:00

62 KiB

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