On 02/21/2017 07:48 AM, Segher Boessenkool wrote:
REGNO can only be called on REGs, not SUBREGs; and INTVAL does not work
on REGs.
2017-02-21 Segher Boessenkool <seg...@kernel.crashing.org>
* config/microblaze/microblaze.c (microblaze_expand_shift): Do not
test for register moves to themselves.
* config/microblaze/microblaze.md (*ashlsi3_byone, *ashrsi3_byone,
*lshrsi3_byone): Test for const1_rtx instead of calling INTVAL on
something that isn't necessarily a CONST_INT.
So I wanted to make sure that the avoidance of a nop-move resulting from
a nop-shift wasn't because the ISA couldn't encode a nop-move (and yes,
I've run into such ISAs).
The microblaze doesn't seem to have any trouble encoding a nop move, so
if we were to generate one due to this change it won't cause a problem.
OK for the trunk.
Jeff
