[llvm] [AMDGPU] Replace dynamic VGPR feature with attribute (PR #133444)

[Diana Picus via llvm-commits]

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@@ -48,6 +48,9 @@ SIMachineFunctionInfo::SIMachineFunctionInfo(const Function &F,
   MaxNumWorkGroups = ST.getMaxNumWorkGroups(F);
   assert(MaxNumWorkGroups.size() == 3);
 
+  IsDynamicVGPREnabled =
+      ST.isDynamicVGPREnabled() || AMDGPU::getIsDynamicVGPR(F);
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rovka wrote:

Because the plan is to remove the subtarget feature after I update the internal users to rely on the attribute instead. In the meantime, both the attribute and the subtarget feature should work.

https://github.com/llvm/llvm-project/pull/133444