[llvm] [AMDGPU] Move stress options into getMaxNumVectorRegs/getBaseMaxNumSGPRs (PR #214762)

[Romanov Vlad via llvm-commits]

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@@ -630,25 +646,28 @@ unsigned GCNSubtarget::getBaseMaxNumVGPRs(
 }
 
 unsigned GCNSubtarget::getMaxNumVGPRs(const Function &F) const {
+  auto [VGPRs, AGPRs] = getMaxNumVectorRegs(F);
+  // On gfx90a+ VGPRs and AGPRs share a unified register file.
+  // On gfx908 they are independent, so only VGPRs count toward the budget.
+  return hasGFX90AInsts() ? VGPRs + AGPRs : VGPRs;
+}
+
+unsigned GCNSubtarget::getMaxNumVGPRs(const MachineFunction &MF) const {
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romanovvlad wrote:

Do you recommend splitting the patch to two parts: getMaxNumVGPRs refactoring and options move?

https://github.com/llvm/llvm-project/pull/214762