blob: 7d1f86f8cee9443939af194bffcf3a8a87428293 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
//===- 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 "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 fir {
#define GEN_PASS_DEF_SIMPLIFYREGIONLITE
#include "flang/Optimizer/Transforms/Passes.h.inc"
} // namespace fir
namespace {
class SimplifyRegionLitePass
: public fir::impl::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);
}
|
