[llvm] [AMDGPU][NFC] Pre-commit test for spilling a read-undef IMPLICIT_DEF (PR #227858)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,131 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
+# RUN: llc -mtriple=amdgpu9.00 -run-pass=greedy -stress-regalloc=4 -verify-machineinstrs %s -o - | FileCheck %s
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arsenm wrote:

Can you use -passes and the appropriate register class filter 

https://github.com/llvm/llvm-project/pull/227858