forked from OSchip/llvm-project
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
//===- SimplifyRegionLite.cpp -- region simplification lite ---------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PassDetail.h"
|
|
#include "flang/Optimizer/Dialect/FIROps.h"
|
|
#include "flang/Optimizer/Transforms/Passes.h"
|
|
#include "mlir/IR/PatternMatch.h"
|
|
#include "mlir/Pass/Pass.h"
|
|
#include "mlir/Transforms/DialectConversion.h"
|
|
#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
|
|
#include "mlir/Transforms/RegionUtils.h"
|
|
|
|
namespace {
|
|
|
|
class SimplifyRegionLitePass
|
|
: public fir::SimplifyRegionLiteBase<SimplifyRegionLitePass> {
|
|
public:
|
|
void runOnOperation() override;
|
|
};
|
|
|
|
class DummyRewriter : public mlir::PatternRewriter {
|
|
public:
|
|
DummyRewriter(mlir::MLIRContext *ctx) : mlir::PatternRewriter(ctx) {}
|
|
};
|
|
|
|
} // namespace
|
|
|
|
void SimplifyRegionLitePass::runOnOperation() {
|
|
auto op = getOperation();
|
|
auto regions = op->getRegions();
|
|
mlir::RewritePatternSet patterns(op.getContext());
|
|
DummyRewriter rewriter(op.getContext());
|
|
if (regions.empty())
|
|
return;
|
|
|
|
(void)mlir::eraseUnreachableBlocks(rewriter, regions);
|
|
(void)mlir::runRegionDCE(rewriter, regions);
|
|
}
|
|
|
|
std::unique_ptr<mlir::Pass> fir::createSimplifyRegionLitePass() {
|
|
return std::make_unique<SimplifyRegionLitePass>();
|
|
}
|