ce702fc8da
This is a convenient utility around the existing `getUsedValuesDefinedAbove()` that take two regions. PiperOrigin-RevId: 266686854
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
//===- RegionUtils.cpp - Region-related transformation utilities ----------===//
|
|
//
|
|
// Copyright 2019 The MLIR Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
// =============================================================================
|
|
|
|
#include "mlir/Transforms/RegionUtils.h"
|
|
#include "mlir/IR/Block.h"
|
|
#include "mlir/IR/Operation.h"
|
|
#include "mlir/IR/Value.h"
|
|
|
|
#include "llvm/ADT/SmallSet.h"
|
|
|
|
using namespace mlir;
|
|
|
|
void mlir::replaceAllUsesInRegionWith(Value *orig, Value *replacement,
|
|
Region ®ion) {
|
|
for (IROperand &use : llvm::make_early_inc_range(orig->getUses())) {
|
|
if (region.isAncestor(use.getOwner()->getParentRegion()))
|
|
use.set(replacement);
|
|
}
|
|
}
|
|
|
|
void mlir::getUsedValuesDefinedAbove(Region ®ion, Region &limit,
|
|
llvm::SetVector<Value *> &values) {
|
|
assert(limit.isAncestor(®ion) &&
|
|
"expected isolation limit to be an ancestor of the given region");
|
|
|
|
// Collect proper ancestors of `limit` upfront to avoid traversing the region
|
|
// tree for every value.
|
|
llvm::SmallPtrSet<Region *, 4> properAncestors;
|
|
for (auto *reg = limit.getParentRegion(); reg != nullptr;
|
|
reg = reg->getParentRegion()) {
|
|
properAncestors.insert(reg);
|
|
}
|
|
|
|
region.walk([&values, &properAncestors](Operation *op) {
|
|
for (Value *operand : op->getOperands())
|
|
// Collect values that are used by an operation and defined in a proper
|
|
// ancestor of region.
|
|
if (properAncestors.count(operand->getParentRegion()))
|
|
values.insert(operand);
|
|
});
|
|
}
|
|
|
|
void mlir::getUsedValuesDefinedAbove(llvm::MutableArrayRef<Region> regions,
|
|
llvm::SetVector<Value *> &values) {
|
|
for (Region ®ion : regions)
|
|
getUsedValuesDefinedAbove(region, region, values);
|
|
}
|