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

[Matt Arsenault via llvm-commits]

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+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -run-pass=regbankselect %s -verify-machineinstrs -o - | FileCheck %s -check-prefixes=OLD_RBS_GFX10
+# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -run-pass=regbankselect %s -verify-machineinstrs -o - | FileCheck %s -check-prefixes=OLD_RBS_GFX12
+# RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -run-pass=regbankselect %s -verify-machineinstrs -o - | FileCheck %s -check-prefixes=NEW_RBS_GFX10
+# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -run-pass=regbankselect %s -verify-machineinstrs -o - | FileCheck %s -check-prefixes=NEW_RBS_GFX12
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arsenm wrote:

```suggestion
# RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -run-pass=regbankselect %s -o - | FileCheck %s -check-prefixes=OLD_RBS_GFX10
# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -run-pass=regbankselect %s -o - | FileCheck %s -check-prefixes=OLD_RBS_GFX12
# RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -run-pass=regbankselect %s -o - | FileCheck %s -check-prefixes=NEW_RBS_GFX10
# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -run-pass=regbankselect %s -o - | FileCheck %s -check-prefixes=NEW_RBS_GFX12
```

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