On 9/26/19 12:49 AM, Jakub Jelinek wrote:
> On Wed, Sep 25, 2019 at 10:06:13PM -0600, Jeff Law wrote:
>> (insn 13 12 14 2 (set (reg:SI 124)
>> (const_int -939524096 [0xffffffffc8000000])) "j.c":10:54 161
>> {*arm_movsi_insn}
>> (nil))
>>
>> (insn 14 13 16 2 (parallel [
>> (set (reg:SI 132)
>> (plus:SI (mult:SI (zero_extend:DI (reg/v:SI 115 [ sec ]))
>> (zero_extend:DI (reg:SI 124)))
>> (reg:SI 130)))
>
> IMNSHO the bug is just in the backend, the above is not valid RTL.
> SImode MULT has to have SImode operands, not DImode operands.
Hmm, yea, I think you're right. I totally missed that last night.
FWIW, we do allow the modes of the input operands to differ. But I
don't think either is allowed to be wider than the result mode of the
multiplication.
I think that means we punt this back to Wilco to fix since it's an ARM
specific issue.
jeff
