[llvm] [RegisterCoalescer] Fix issue in the RegisterCoalescer. (PR #96839)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,26 @@
+# RUN: llc -mtriple powerpc64le-unknown-linux-gnu -mcpu=pwr8 -x mir < %s \
+# RUN:   -verify-machineinstrs --run-pass=register-coalescer -o - | FileCheck %s
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arsenm wrote:

-verify-coalescing would be more useful than -verify-machineinstrs. Also, should use update_mir_test_checks 

https://github.com/llvm/llvm-project/pull/96839