[mlir][NFC] remove-dead-values: Get canonicalization patterns from ops#176712
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@llvm/pr-subscribers-mlir-core Author: Matthias Springer (matthias-springer) ChangesCollect canonicalization patterns from the region branch ops (instead of populating all canonicalization patterns). Addresses a comment on a merged PR. Full diff: https://github.com/llvm/llvm-project/pull/176712.diff 1 Files Affected:
diff --git a/mlir/lib/Transforms/RemoveDeadValues.cpp b/mlir/lib/Transforms/RemoveDeadValues.cpp
index 44b1bcf8e4300..66f369e8a5f65 100644
--- a/mlir/lib/Transforms/RemoveDeadValues.cpp
+++ b/mlir/lib/Transforms/RemoveDeadValues.cpp
@@ -779,13 +779,13 @@ void RemoveDeadValues::runOnOperation() {
module->walk([&](RegionBranchOpInterface regionBranchOp) {
opsToCanonicalize.push_back(regionBranchOp.getOperation());
});
- // TODO: Apply only region branch op canonicalization patterns or find a
- // better API to collect all canonicalization patterns.
+ // Collect all canonicalization patterns for region branch ops.
RewritePatternSet owningPatterns(context);
- for (auto *dialect : context->getLoadedDialects())
- dialect->getCanonicalizationPatterns(owningPatterns);
- for (RegisteredOperationName op : context->getRegisteredOperations())
- op.getCanonicalizationPatterns(owningPatterns, context);
+ DenseSet<RegisteredOperationName> populatedPatterns;
+ for (Operation *op : opsToCanonicalize)
+ if (std::optional<RegisteredOperationName> info = op->getRegisteredInfo())
+ if (populatedPatterns.insert(*info).second)
+ info->getCanonicalizationPatterns(owningPatterns, context);
if (failed(applyOpPatternsGreedily(opsToCanonicalize,
std::move(owningPatterns)))) {
module->emitError("greedy pattern rewrite failed to converge");
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Member
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@llvm/pr-subscribers-mlir Author: Matthias Springer (matthias-springer) ChangesCollect canonicalization patterns from the region branch ops (instead of populating all canonicalization patterns). Addresses a comment on a merged PR. Full diff: https://github.com/llvm/llvm-project/pull/176712.diff 1 Files Affected:
diff --git a/mlir/lib/Transforms/RemoveDeadValues.cpp b/mlir/lib/Transforms/RemoveDeadValues.cpp
index 44b1bcf8e4300..66f369e8a5f65 100644
--- a/mlir/lib/Transforms/RemoveDeadValues.cpp
+++ b/mlir/lib/Transforms/RemoveDeadValues.cpp
@@ -779,13 +779,13 @@ void RemoveDeadValues::runOnOperation() {
module->walk([&](RegionBranchOpInterface regionBranchOp) {
opsToCanonicalize.push_back(regionBranchOp.getOperation());
});
- // TODO: Apply only region branch op canonicalization patterns or find a
- // better API to collect all canonicalization patterns.
+ // Collect all canonicalization patterns for region branch ops.
RewritePatternSet owningPatterns(context);
- for (auto *dialect : context->getLoadedDialects())
- dialect->getCanonicalizationPatterns(owningPatterns);
- for (RegisteredOperationName op : context->getRegisteredOperations())
- op.getCanonicalizationPatterns(owningPatterns, context);
+ DenseSet<RegisteredOperationName> populatedPatterns;
+ for (Operation *op : opsToCanonicalize)
+ if (std::optional<RegisteredOperationName> info = op->getRegisteredInfo())
+ if (populatedPatterns.insert(*info).second)
+ info->getCanonicalizationPatterns(owningPatterns, context);
if (failed(applyOpPatternsGreedily(opsToCanonicalize,
std::move(owningPatterns)))) {
module->emitError("greedy pattern rewrite failed to converge");
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joker-eph
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Jan 19, 2026
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…ops (llvm#176712) Collect canonicalization patterns from the region branch ops (instead of populating all canonicalization patterns). Addresses a [comment](llvm#173505 (comment)) on a merged PR.
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Collect canonicalization patterns from the region branch ops (instead of populating all canonicalization patterns).
Addresses a comment on a merged PR.