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correctly check uses of pattern descriptor transform ops #118791

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Merged
merged 1 commit into from
Dec 15, 2024
Merged

correctly check uses of pattern descriptor transform ops #118791

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2 changes: 2 additions & 0 deletions mlir/lib/Dialect/Transform/Transforms/CheckUses.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -338,6 +338,8 @@ class TransformOpMemFreeAnalysis {
void collectFreedValues(Operation *root) {
SmallVector<MemoryEffects::EffectInstance> instances;
root->walk([&](Operation *child) {
if (isa<transform::PatternDescriptorOpInterface>(child))
return;
// TODO: extend this to conservatively handle operations with undeclared
// side effects as maybe freeing the operands.
auto iface = cast<MemoryEffectOpInterface>(child);
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14 changes: 14 additions & 0 deletions mlir/test/Dialect/Transform/check-use-after-free.mlir
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Expand Up @@ -177,3 +177,17 @@ transform.sequence failures(propagate) {
^bb0(%arg1: !transform.any_op):
}
}

// -----

// This should not crash.

module attributes {transform.with_named_sequence} {
transform.named_sequence @__transform_main(%arg0: !transform.any_op {transform.readonly}) {
%0 = transform.structured.match ops{["func.func"]} in %arg0 : (!transform.any_op) -> !transform.any_op
transform.apply_patterns to %0 {
transform.apply_patterns.memref.extract_address_computations
} : !transform.any_op
transform.yield
}
}
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