================
@@ -2538,6 +2538,190 @@ Value *getSalvageOpsForIcmpOp(ICmpInst *Icmp, uint64_t 
CurrentLocOps,
   return Icmp->getOperand(0);
 }
 
+void llvm::tryToSinkInstructionDbgValues(
----------------
minglotus-6 wrote:

The `gep` and `load` sequence doesn't have debug values (so far) so it's not 
easy to test within this PR.

IMO helper functions that handles debug value along instruction sink (e.g. 
https://github.com/llvm/llvm-project/blob/1752740f4b4b752bbe2987a0de398c6f671ceb71/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp#L4769)
 will help other passes (e.g., simplify-cfg, etc) that moves instruction 
around. And test cases can be added for these shared helper functions.

https://github.com/llvm/llvm-project/pull/81442
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