[llvm] AMDGPU/GlobalISel: Add skeletons for new register bank select passes (PR #112862)

[Petar Avramovic via llvm-commits]

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@@ -39,6 +39,8 @@ FunctionPass *createSIFoldOperandsLegacyPass();
 FunctionPass *createSIPeepholeSDWALegacyPass();
 FunctionPass *createSILowerI1CopiesLegacyPass();
 FunctionPass *createAMDGPUGlobalISelDivergenceLoweringPass();
+FunctionPass *createAMDGPURBSelectPass();
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petar-avramovic wrote:

The AMDGPURegBankSelect is functional except for some functions with divergent control flow. Deleting it now breaks almost all globalisel regression tests.
When new regbankselect path gets functional we can make it a default path and decide what to do with AMDGPURegBankSelect, maybe rename it to legacy or just delete it.

New pass names as suggested:
 AMDGPUStandaloneRegBankSelect
 AMDGPURegBankLegalize

https://github.com/llvm/llvm-project/pull/112862