[llvm] [Draft][AMDGPU] Rematerialize VGPR candidates when SGPR spills results in VGPR Excess (PR #168079)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -406,15 +416,15 @@ bool GCNRPTarget::isSaveBeneficial(Register Reg) const {
   const TargetRegisterInfo *TRI = MRI.getTargetRegisterInfo();
   const SIRegisterInfo *SRI = static_cast<const SIRegisterInfo *>(TRI);
 
+  RegExcess Excess(MF, RP, MaxSGPRs, MaxVGPRs);
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jmmartinez wrote:

I think you're right. In that case it should be:

```cpp
RegExcess Excess(MF, RP, MaxSGPRs, UnifiedRF ? MaxUnifiedVGPRs : MaxVGPRs);
```

https://github.com/llvm/llvm-project/pull/168079