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vgpr_64
2012 Oct 25
0
[LLVMdev] How to use TargetLowering::addRegisterClass() for multiple register classes
Hi,
On my target, most value types can be stored in two register classes.
For example:
def SReg_64 : RegisterClass<"AMDGPU", [i64], 64, (add SGPR_64, VCC, EXEC)>;
def VReg_64 : RegisterClass<"AMDGPU", [i64], 64, (add VGPR_64)>;
What criteria should I use to decide which register class to associate
with each type using TargetLowering::addRegisterClass() ?
Thanks,
Tom