https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
--- Comment #6 from HaoChen Gui ---
I made a patch to convert ashift to move when the second operand is const0_rtx.
With the patch, the expand dump is just like aarch64's. But the problem is
still there.
I tested the patch with SPECint. All the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
HaoChen Gui changed:
What|Removed |Added
CC||guihaoc at gcc dot gnu.org
--- Comment #5
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
--- Comment #4 from Segher Boessenkool ---
On aarch64 we have (in expand):
;; i_4 = i_3 << 64;
(insn 10 9 11 (set (subreg:DI (reg/v:TI 94 [ i ]) 8)
(subreg:DI (reg/v:TI 93 [ i ]) 0)) "100694.c":4:6 -1
(nil))
(insn 11 10 0 (set (s
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
--- Comment #3 from Segher Boessenkool ---
Should this not be handled by the subreg passes?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
--- Co
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100694
Segher Boessenkool changed:
What|Removed |Added
Last reconfirmed||2021-05-20
Ever confirmed|0
