[llvm] [TRI] Remove reserved registers in getRegPressureSetLimit (PR #118787)

[Pengcheng Wang via llvm-commits]

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@@ -674,6 +674,50 @@ TargetRegisterInfo::prependOffsetExpression(const DIExpression *Expr,
                                       PrependFlags & DIExpression::EntryValue);
 }
 
+unsigned TargetRegisterInfo::getRegPressureSetLimit(const MachineFunction &MF,
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wangpc-pp wrote:

We can add a comment on `TargetRegisterInfo::getRegPressureSetLimit` to suggest people to use `RegisterClassInfo`, it may help in a way... And then, we can rewrite those direct users to use `RegisterClassInfo` as follow ups.

https://github.com/llvm/llvm-project/pull/118787