[llvm] [NFC][AMDGPU] Pre-commit tests for buffer contents legalization (PR #110559)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,1685 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -mcpu=gfx900 -amdgpu-lower-buffer-fat-pointers < %s | FileCheck %s
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arsenm wrote:

Don't bother with the old PM run line 

https://github.com/llvm/llvm-project/pull/110559