On 10/28/14 06:40, Jakub Jelinek wrote:
I'd say if on the target reg26 or reg27 is used or clobbered by
multiplication, then it is a user error to use it this way, the register
then isn't suitable for the local hard register usage.
Right.
And this situation is a great example of why clobbering hard registers
in patterns is a bad idea.
This has a much greater chance of working if the patterns instead
clobbered a pseudo/scratch where the constraint specifies a class that
has r26/r27 as a member (possibly its only member).
Jeff
