| 1 | //===---------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===---------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "clang/CIR/Interfaces/CIRLoopOpInterface.h" |
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| 10 | |
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| 11 | #include "clang/CIR/Dialect/IR/CIRDialect.h" |
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| 12 | #include "clang/CIR/Interfaces/CIRLoopOpInterface.cpp.inc" |
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| 13 | #include "llvm/Support/ErrorHandling.h" |
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| 14 | |
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| 15 | namespace cir { |
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| 16 | |
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| 17 | void LoopOpInterface::getLoopOpSuccessorRegions( |
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| 18 | LoopOpInterface op, mlir::RegionBranchPoint point, |
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| 19 | llvm::SmallVectorImpl<mlir::RegionSuccessor> ®ions) { |
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| 20 | assert(point.isParent() || point.getRegionOrNull()); |
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| 21 | |
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| 22 | // Branching to first region: go to condition or body (do-while). |
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| 23 | if (point.isParent()) { |
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| 24 | regions.emplace_back(&op.getEntry(), op.getEntry().getArguments()); |
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| 25 | return; |
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| 26 | } |
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| 27 | |
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| 28 | // Branching from condition: go to body or exit. |
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| 29 | if (&op.getCond() == point.getRegionOrNull()) { |
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| 30 | regions.emplace_back(mlir::RegionSuccessor(op->getResults())); |
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| 31 | regions.emplace_back(&op.getBody(), op.getBody().getArguments()); |
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| 32 | return; |
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| 33 | } |
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| 34 | |
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| 35 | // Branching from body: go to step (for) or condition. |
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| 36 | if (&op.getBody() == point.getRegionOrNull()) { |
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| 37 | // FIXME(cir): Should we consider break/continue statements here? |
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| 38 | mlir::Region *afterBody = |
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| 39 | (op.maybeGetStep() ? op.maybeGetStep() : &op.getCond()); |
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| 40 | regions.emplace_back(afterBody, afterBody->getArguments()); |
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| 41 | return; |
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| 42 | } |
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| 43 | |
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| 44 | // Branching from step: go to condition. |
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| 45 | if (op.maybeGetStep() == point.getRegionOrNull()) { |
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| 46 | regions.emplace_back(&op.getCond(), op.getCond().getArguments()); |
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| 47 | return; |
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| 48 | } |
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| 49 | |
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| 50 | llvm_unreachable("unexpected branch origin" ); |
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| 51 | } |
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| 52 | |
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| 53 | /// Verify invariants of the LoopOpInterface. |
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| 54 | llvm::LogicalResult detail::verifyLoopOpInterface(mlir::Operation *op) { |
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| 55 | // FIXME: fix this so the conditionop isn't requiring MLIRCIR |
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| 56 | // auto loopOp = mlir::cast<LoopOpInterface>(op); |
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| 57 | // if (!mlir::isa<ConditionOp>(loopOp.getCond().back().getTerminator())) |
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| 58 | // return op->emitOpError( |
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| 59 | // "expected condition region to terminate with 'cir.condition'"); |
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| 60 | return llvm::success(); |
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| 61 | } |
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| 62 | |
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| 63 | } // namespace cir |
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| 64 | |
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