[RISCV] Fix issues in ORI to QC.INSBI transformation (#148809)

The transformation done in #147349 was incorrect since we were not
passing the input node of the `OR` instruction to the `QC.INSBI`
instruction leading to the generated instruction doing the wrong thing.
In order to do this we first needed to add the output register to
`QC.INSBI` as being both an input and output.

The code produced after the above fix will need a copy (mv) to preserve
the register input to the OR instruction if it has more than one use
making the transformation net neutral ( `6-byte QC.E.ORI/ORAI` vs
`2-byte C.MV + 4-byte QC.INSB`I). Avoid doing the transformation if
there is more than one use of the input register to the OR instruction.

0 files changed, 0 insertions, 0 deletions