unsigned AMDGPURegisterBankInfo::copyCost(const RegisterBank &Dst,
const RegisterBank &Src,
unsigned Size) const {
if (Dst.getID() == AMDGPU::SGPRRegBankID &&
Src.getID() == AMDGPU::VGPRRegBankID)
return std::numeric_limits<unsigned>::max();
// SGPRRegBank with size 1 is actually vcc or another 64-bit sgpr written by
// the valu.
if (Size == 1 && Dst.getID() == AMDGPU::SCCRegBankID &&
Src.getID() == AMDGPU::SGPRRegBankID)
return std::numeric_limits<unsigned>::max();
return RegisterBankInfo::copyCost(Dst, Src, Size);
}
bool RegisterBank::operator==(const RegisterBank &OtherRB) const {
// There must be only one instance of a given register bank alive
// for the whole compilation.
// The RegisterBankInfo is supposed to enforce that.
assert((OtherRB.getID() != getID() || &OtherRB == this) &&
"ID does not uniquely identify a RegisterBank");
return &OtherRB == this;
}
