[llvm] [SLP] Make getSameOpcode support different instructions if they have same semantics. (PR #112181)

[Alexey Bataev via llvm-commits]

================
@@ -1075,6 +1224,24 @@ static InstructionsState getSameOpcode(ArrayRef<Value *> VL,
     return InstructionsState::invalid();
   }
 
+  if (IsBinOp) {
+    auto FindOp = [&](ArrayRef<InterchangeableInstruction> CandidateOp) {
+      for (Value *V : VL) {
+        if (!isa<Instruction>(V))
+          continue;
----------------
alexey-bataev wrote:

```suggestion
        if (isa<PoisonValue>(V))
          continue;
```

https://github.com/llvm/llvm-project/pull/112181