[llvm] [AVR] Fix a crash in AVRInstrInfo::insertIndirectBranch (PR #67324)

[via llvm-commits]

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@@ -7,6 +8,15 @@
 ; CHECK: [[BB1]]:
 ; CHECK: nop
 ; CHECK: [[BB2]]:
+
+; AVR2-LABEL: relax_to_jmp:
+; AVR2: cpi     r{{[0-9]+}}, 0
+; AVR2: brne    [[BB1:.LBB[0-9]+_[0-9]+]]
+; AVR2: rjmp    [[BB2:.LBB[0-9]+_[0-9]+]]
+; AVR2: [[BB1]]:
+; AVR2: nop
+; AVR2: [[BB2]]:
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aykevl wrote:

I think a comment explaining why `rjmp` is intended would be a good idea, to help future people working on this code.

https://github.com/llvm/llvm-project/pull/67324