[llvm] [RISCV][MCP] Remove redundant move from tail duplication (PR #89865)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,50 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc < %s -mtriple=riscv64 -mcpu=sifive-x280 -O3 | FileCheck %s
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arsenm wrote:

Probably can drop the -O3 

https://github.com/llvm/llvm-project/pull/89865