[clang] [llvm] [ARM] musttail fixes (PR #102896)

[Eli Friedman via cfe-commits]

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@@ -0,0 +1,43 @@
+; RUN: llc -mtriple=arm-eabi %s -o - | FileCheck %s
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efriedma-quic wrote:

Please generate checks with update_llc_test_checks.py

https://github.com/llvm/llvm-project/pull/102896