[llvm] [CodeGen] Add MachineRegisterClassInfo analysis pass (PR #120690)

[Pengcheng Wang via llvm-commits]

================
@@ -42,7 +43,7 @@ class SIPreAllocateWWMRegs {
   LiveIntervals *LIS;
   LiveRegMatrix *Matrix;
   VirtRegMap *VRM;
-  RegisterClassInfo RegClassInfo;
+  RegisterClassInfo *RegClassInfo;
----------------
wangpc-pp wrote:

Is it necessary? I think almost all analysis results are pointers, just like above.

https://github.com/llvm/llvm-project/pull/120690