llvm dev - Oct 2008 - [LLVMdev] Spilling constants to memory

Is there any way to get llvm to not spill floating point constants to
memory but to keep them in registers, i.e. get rid of the constantPool
and just generate ConstantFP instructions?

 

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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On Tue, Oct 7, 2008 at 4:02 PM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> Is there any way to get llvm to not spill floating point constants to
memory
> but to keep them in registers, i.e. get rid of the constantPool and just
> generate ConstantFP instructions?
"setOperationAction(ISD::ConstantFP, MVT::f32, Legal);"?

-Eli

Thanks Eli,
 That did exactly what I wanted.

Micah

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Eli Friedman
Sent: Tuesday, October 07, 2008 5:31 PM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Spilling constants to memory

On Tue, Oct 7, 2008 at 4:02 PM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> Is there any way to get llvm to not spill floating point constants to
memory
> but to keep them in registers, i.e. get rid of the constantPool and
just
> generate ConstantFP instructions?
"setOperationAction(ISD::ConstantFP, MVT::f32, Legal);"?

-Eli
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