1//===-- SIFixSGPRCopies.cpp - Remove potential VGPR => SGPR copies --------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//

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182 unsigned SrcSubReg = Copy.getOperand(1).getSubReg();
183 const TargetRegisterClass *DstRC = MRI.getRegClass(DstReg);
184 const TargetRegisterClass *SrcRC;
185
186 if (!TargetRegisterInfo::isVirtualRegister(SrcReg) ||
187 DstRC == &AMDGPU::M0RegRegClass)
188 return false;
189
190 SrcRC = inferRegClassFromDef(TRI, MRI, SrcReg, SrcSubReg);
191 return TRI->isSGPRClass(DstRC) && TRI->hasVGPRs(SrcRC);
192}
193
194bool SIFixSGPRCopies::runOnMachineFunction(MachineFunction &MF) {
195 MachineRegisterInfo &MRI = MF.getRegInfo();
196 const SIRegisterInfo *TRI = static_cast<const SIRegisterInfo *>(
197 MF.getTarget().getRegisterInfo());
198 const SIInstrInfo *TII = static_cast<const SIInstrInfo *>(

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