[llvm] [GlobalISel] Allow customizing instruction-select pass (PR #95724)

[Matt Arsenault via llvm-commits]

================
@@ -49,8 +49,8 @@ class InstructionSelect : public MachineFunctionPass {
         MachineFunctionProperties::Property::Selected);
   }
 
-  InstructionSelect(CodeGenOptLevel OL);
-  InstructionSelect();
+  InstructionSelect(CodeGenOptLevel OL = CodeGenOptLevel::Default,
+                    char &PassID = ID);
----------------
arsenm wrote:

Do you have a follow up / example of how you would use this to specify the dependencies? I don't this is enough to make InstructionSelect usable from subclasses 

https://github.com/llvm/llvm-project/pull/95724