llvm dev - Sep 2008 - [LLVMdev] Determining the register type of a MachineOperand

How do I determine what type of register(i.e. i32, f32, etc..) I am
accessing from a MachineOperand? I.e. how do I get to the MVT struct, or
equivalent information, from a MachineOperand object?

 

Micah Villmow

Systems Engineer

Advanced Technology & Performance

Advanced Micro Devices Inc.

4555 Great America Pkwy,

Santa Clara, CA. 95054

P: 408-572-6219

F: 408-572-6596

 

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You can get to the MachineInstr from a MachineOperand. Then get to its  
TargetInstrDesc and TargetOperandInfo which has register class  
information.

Evan

On Sep 23, 2008, at 12:44 PM, Villmow, Micah wrote:
> How do I determine what type of register(i.e. i32, f32, etc..) I am  
> accessing from a MachineOperand? I.e. how do I get to the MVT  
> struct, or equivalent information, from a MachineOperand object?
>
> Micah Villmow
> Systems Engineer
> Advanced Technology & Performance
> Advanced Micro Devices Inc.
> 4555 Great America Pkwy,
> Santa Clara, CA. 95054
> P: 408-572-6219
> F: 408-572-6596
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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This only has the register class information, not the register type
information.

 

My register class has multiple register types and I need to know how to
differentiate which register type of my register class of the current
register.

The information in the MVT data type is what I need, i.e. the position
in the GPRVT array of each register.

 

Something equivalent to MVT getValueType() but for registers.

 

Thanks,

 

________________________________

From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Evan Cheng
Sent: Wednesday, September 24, 2008 10:22 AM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Determining the register type of a MachineOperand

 

You can get to the MachineInstr from a MachineOperand. Then get to its
TargetInstrDesc and TargetOperandInfo which has register class
information.

 

Evan

 

On Sep 23, 2008, at 12:44 PM, Villmow, Micah wrote:





How do I determine what type of register(i.e. i32, f32, etc..) I am
accessing from a MachineOperand? I.e. how do I get to the MVT struct, or
equivalent information, from a MachineOperand object?

 

Micah Villmow

Systems Engineer

Advanced Technology & Performance

Advanced Micro Devices Inc.

4555 Great America Pkwy,

Santa Clara, CA. 95054

P: 408-572-6219

F: 408-572-6596

 

_______________________________________________
LLVM Developers mailing list
LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev



 

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