[llvm-dev] lower 64 bits constant

Xiangyang Guo via llvm-dev
Wed, 02 Dec 2015 19:59:10 -0000

Thanks for your reply.

Yes, f64 is valid type. "setOperationAction(ISD::ConstantFP, MVT::f64,
Legal)" does the trick.

Regards,

Xiangyang

2015-12-02 13:36 GMT-05:00 Krzysztof Parzyszek via llvm-dev <
llvm-dev at lists.llvm.org>:

> On 12/2/2015 12:30 PM, Xiangyang Guo via llvm-dev wrote:
>
>>
>> GRWideRegs can be f64 and i64. However, the 'const-long' works
while the
>> 'const-double' doesn't work. From the -debug log, it seems
"f64 >> ConstantFP" is replaced by "f64,ch = load" and
this is where the error
>> happens. Can anyone tell me why this happens and how to make this work?
>>
>> Any suggestion is appreciated.
>>
>
> Is f64 a valid type for GRWideRegs?
>
> -Krzysztof
>
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