[llvm] [CodeGen] Port ExpandMemCmp to new pass manager (PR #74050)

[via llvm-commits]

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@@ -41,6 +41,7 @@ FUNCTION_PASS("consthoist", ConstantHoistingPass, ())
 FUNCTION_PASS("ee-instrument", EntryExitInstrumenterPass, (false))
 FUNCTION_PASS("expand-large-div-rem", ExpandLargeDivRemPass, ())
 FUNCTION_PASS("expand-large-fp-convert", ExpandLargeFpConvertPass, ())
+FUNCTION_PASS("expand-memcmp", ExpandMemCmpPass, (TM))
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paperchalice wrote:

IIUC, it denotes `memcmp` in C so I follow C's behavior.

https://github.com/llvm/llvm-project/pull/74050