[llvm] ValueTracking: introduce llvm::isLanewiseOperation (PR #112011)

[via llvm-commits]

================
@@ -6947,6 +6947,30 @@ bool llvm::onlyUsedByLifetimeMarkersOrDroppableInsts(const Value *V) {
       V, /* AllowLifetime */ true, /* AllowDroppable */ true);
 }
 
+bool llvm::isLanewiseOperation(const Instruction *I) {
+  if (auto *II = dyn_cast<IntrinsicInst>(I)) {
----------------
goldsteinn wrote:

```
  if (isBinaryOp() || isUnaryOp())
    return true;
  if (isCast() && !isa<BitCastInst>(this))
    return true;
  if (isa<SelectInst>(this) || isa<CmpInst>(this))
    return true;
```
probably

https://github.com/llvm/llvm-project/pull/112011