[llvm] [Mips] Add compact branch patterns for MipsR6 (PR #171131)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,203 @@
+; RUN: llc -mtriple=mipsel -mcpu=mips32r6 < %s | FileCheck %s
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arsenm wrote:

Can you use update_llc_test_checks? 

https://github.com/llvm/llvm-project/pull/171131