| 1 | //===- TypeConversions.cpp - Convert signless types into C/C++ types ------===// |
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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 "mlir/Dialect/EmitC/Transforms/TypeConversions.h" |
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| 10 | #include "mlir/Dialect/EmitC/IR/EmitC.h" |
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| 11 | #include "mlir/IR/BuiltinTypes.h" |
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| 12 | #include "mlir/Transforms/DialectConversion.h" |
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| 13 | #include <optional> |
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| 14 | |
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| 15 | using namespace mlir; |
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| 16 | |
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| 17 | namespace { |
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| 18 | |
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| 19 | Value materializeAsUnrealizedCast(OpBuilder &builder, Type resultType, |
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| 20 | ValueRange inputs, Location loc) { |
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| 21 | if (inputs.size() != 1) |
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| 22 | return Value(); |
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| 23 | |
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| 24 | return builder.create<UnrealizedConversionCastOp>(loc, resultType, inputs) |
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| 25 | .getResult(0); |
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| 26 | } |
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| 27 | |
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| 28 | } // namespace |
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| 29 | |
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| 30 | void mlir::populateEmitCSizeTTypeConversions(TypeConverter &converter) { |
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| 31 | converter.addConversion( |
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| 32 | callback: [](IndexType type) { return emitc::SizeTType::get(type.getContext()); }); |
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| 33 | |
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| 34 | converter.addSourceMaterialization(callback&: materializeAsUnrealizedCast); |
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| 35 | converter.addTargetMaterialization(callback&: materializeAsUnrealizedCast); |
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| 36 | } |
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| 37 | |
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| 38 | /// Get an unsigned integer or size data type corresponding to \p ty. |
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| 39 | std::optional<Type> mlir::emitc::getUnsignedTypeFor(Type ty) { |
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| 40 | if (ty.isInteger()) |
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| 41 | return IntegerType::get(ty.getContext(), ty.getIntOrFloatBitWidth(), |
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| 42 | IntegerType::SignednessSemantics::Unsigned); |
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| 43 | if (isa<PtrDiffTType, SignedSizeTType>(ty)) |
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| 44 | return SizeTType::get(ty.getContext()); |
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| 45 | if (isa<SizeTType>(ty)) |
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| 46 | return ty; |
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| 47 | return {}; |
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| 48 | } |
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| 49 | |
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| 50 | /// Get a signed integer or size data type corresponding to \p ty that supports |
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| 51 | /// arithmetic on negative values. |
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| 52 | std::optional<Type> mlir::emitc::getSignedTypeFor(Type ty) { |
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| 53 | if (ty.isInteger()) |
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| 54 | return IntegerType::get(ty.getContext(), ty.getIntOrFloatBitWidth(), |
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| 55 | IntegerType::SignednessSemantics::Signed); |
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| 56 | if (isa<SizeTType, SignedSizeTType>(ty)) |
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| 57 | return PtrDiffTType::get(ty.getContext()); |
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| 58 | if (isa<PtrDiffTType>(ty)) |
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| 59 | return ty; |
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| 60 | return {}; |
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| 61 | } |
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| 62 | |
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