[Mlir-commits] [mlir] [mlir][Transforms] --remove-dead-values: keep values used in public function calls (PR #83249)

[Artem Tyurin]

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@@ -178,6 +181,12 @@ static void cleanSimpleOp(Operation *op, RunLivenessAnalysis &la) {
   if (!isMemoryEffectFree(op) || hasLive(op->getResults(), la))
     return;
 
+  for (OpOperand &use : op->getUses())
+    if (auto callOp = dyn_cast<CallOpInterface>(use.getOwner()))
+      if (auto funcOp = dyn_cast<FunctionOpInterface>(callOp.resolveCallable()))
+        if (funcOp.isPublic())
+          return;
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agentcooper wrote:

I see `llvm.mlir.undef` and `spirv.Undef`. Is there a generic "undef" value that I can use here?

https://github.com/llvm/llvm-project/pull/83249