[Mlir-commits] [mlir] [mlir][IR][NFC] Add `RewriterBase::eraseOpResults` convenience helper (PR #174152)

[Ivan Butygin]

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@@ -244,6 +244,42 @@ void RewriterBase::eraseBlock(Block *block) {
   block->erase();
 }
 
+Operation *RewriterBase::eraseOpResults(Operation *op,
+                                        const BitVector &eraseIndices) {
+  assert(op->getNumResults() == eraseIndices.size() &&
+         "number of op results and bitvector size must match");
+
+  // Gather new result types.
+  SmallVector<Type> newResultTypes;
+  newResultTypes.reserve(op->getNumResults() - eraseIndices.count());
+  for (OpResult result : op->getResults())
+    if (!eraseIndices[result.getResultNumber()])
+      newResultTypes.push_back(result.getType());
+
+  // Create a new operation and inline all regions.
+  InsertionGuard g(*this);
+  setInsertionPoint(op);
+  OperationState state(op->getLoc(), op->getName().getStringRef(),
+                       op->getOperands(), newResultTypes, op->getAttrs());
+  for (unsigned i = 0, e = op->getNumRegions(); i < e; ++i)
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Hardcode84 wrote:

nit: also `llvm::seq`

https://github.com/llvm/llvm-project/pull/174152