On 03/21/2017 07:15 AM, Jakub Jelinek wrote:
Not really sure what we should do if both i1 and i2 are frame related, shall
we check for each of the CFA reg notes if they are available and equal?
Or punt if either of the insns is frame related?
I would punt if either is frame related.
As an aside, if the length of "blockage" is corrected to 0, does cross-jumping
skip this case? Because replacing a simple_return with a direct branch to a
simple_return is not a win. But of course at the moment cross-jumping thinks
it is eliminating the second blockage as well...
r~
