https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104923
Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |bergner at gcc dot
gnu.org
Known to fail| |11.0, 12.0
Known to work| |10.0
Status|UNCONFIRMED |ASSIGNED
Ever confirmed|0 |1
Last reconfirmed| |2022-03-14
--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
We ICE due to having illegal addresses in the MEM passed to the
__builtin_mma_disassemble_acc builtin:
(insn 18 17 0 2 (set (mem:V16QI (plus:DI (and:DI (mult:DI (reg:DI 137)
(const_int 32 [0x20]))
(const_int 68719476704 [0xfffffffe0]))
(reg:DI 136)) [0 *_4+0 S16 A128])
(unspec:V16QI [
(reg:XO 134 [ *acc_6(D) ])
(const_int 3 [0x3])
] UNSPEC_MMA_EXTRACT)) "ice1.c":6:14 2153 {*mma_disassemble_acc}
(expr_list:REG_DEAD (reg:DI 137)
(expr_list:REG_DEAD (reg:DI 136)
(expr_list:REG_DEAD (reg:XO 134 [ *acc_6(D) ])
(nil)))))
The problem here is that the mma_disassemble_output_operand predicate is too
lenient on the types of addresses it will accept. I have a patch which
restricts the addresses accepted which fixes the ICE. I'm currently regression
testing the patch.
