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Rename channel

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Delete channel

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mode name
-rw-r--r-- atomic.ll
-rw-r--r-- capture.ll
-rw-r--r-- debug_calls.ll
-rw-r--r-- eh.ll
-rw-r--r-- missing_dbg.ll
-rw-r--r-- personality.ll
-rw-r--r-- str-nobuiltin.ll
-rw-r--r-- tsan-vs-gvn.ll
-rw-r--r-- tsan_basic.ll
-rw-r--r-- tsan_musttail.ll
-rw-r--r-- unaligned.ll
-rw-r--r-- volatile.ll
-rw-r--r-- vptr_read.ll
-rw-r--r-- vptr_update.ll