265 lines
10 KiB
C++
265 lines
10 KiB
C++
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//===- Utils.cpp - Utilities to support the Linalg dialect ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements utilities for the Linalg dialect.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Arith/Utils/Utils.h"
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#include "mlir/Dialect/Arith/IR/Arith.h"
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#include "mlir/Dialect/Complex/IR/Complex.h"
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#include "mlir/IR/ImplicitLocOpBuilder.h"
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#include "llvm/ADT/SmallBitVector.h"
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using namespace mlir;
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/// Matches a ConstantIndexOp.
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/// TODO: This should probably just be a general matcher that uses matchConstant
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/// and checks the operation for an index type.
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detail::op_matcher<arith::ConstantIndexOp> mlir::matchConstantIndex() {
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return detail::op_matcher<arith::ConstantIndexOp>();
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}
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llvm::SmallBitVector mlir::getPositionsOfShapeOne(unsigned rank,
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ArrayRef<int64_t> shape) {
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llvm::SmallBitVector dimsToProject(shape.size());
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for (unsigned pos = 0, e = shape.size(); pos < e && rank > 0; ++pos) {
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if (shape[pos] == 1) {
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dimsToProject.set(pos);
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--rank;
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}
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}
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return dimsToProject;
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}
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Value mlir::getValueOrCreateConstantIndexOp(OpBuilder &b, Location loc,
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OpFoldResult ofr) {
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if (auto value = llvm::dyn_cast_if_present<Value>(ofr))
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return value;
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auto attr = dyn_cast<IntegerAttr>(llvm::dyn_cast_if_present<Attribute>(ofr));
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assert(attr && "expect the op fold result casts to an integer attribute");
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return b.create<arith::ConstantIndexOp>(loc, attr.getValue().getSExtValue());
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}
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Value mlir::getValueOrCreateCastToIndexLike(OpBuilder &b, Location loc,
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Type targetType, Value value) {
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if (targetType == value.getType())
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return value;
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bool targetIsIndex = targetType.isIndex();
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bool valueIsIndex = value.getType().isIndex();
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if (targetIsIndex ^ valueIsIndex)
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return b.create<arith::IndexCastOp>(loc, targetType, value);
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auto targetIntegerType = dyn_cast<IntegerType>(targetType);
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auto valueIntegerType = dyn_cast<IntegerType>(value.getType());
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assert(targetIntegerType && valueIntegerType &&
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"unexpected cast between types other than integers and index");
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assert(targetIntegerType.getSignedness() == valueIntegerType.getSignedness());
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if (targetIntegerType.getWidth() > valueIntegerType.getWidth())
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return b.create<arith::ExtSIOp>(loc, targetIntegerType, value);
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return b.create<arith::TruncIOp>(loc, targetIntegerType, value);
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}
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static Value convertScalarToIntDtype(ImplicitLocOpBuilder &b, Value operand,
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IntegerType toType, bool isUnsigned) {
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// If operand is floating point, cast directly to the int type.
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if (isa<FloatType>(operand.getType())) {
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if (isUnsigned)
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return b.create<arith::FPToUIOp>(toType, operand);
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return b.create<arith::FPToSIOp>(toType, operand);
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}
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// Cast index operands directly to the int type.
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if (operand.getType().isIndex())
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return b.create<arith::IndexCastOp>(toType, operand);
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if (auto fromIntType = dyn_cast<IntegerType>(operand.getType())) {
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// Either extend or truncate.
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if (toType.getWidth() > fromIntType.getWidth()) {
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if (isUnsigned)
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return b.create<arith::ExtUIOp>(toType, operand);
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return b.create<arith::ExtSIOp>(toType, operand);
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}
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if (toType.getWidth() < fromIntType.getWidth())
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return b.create<arith::TruncIOp>(toType, operand);
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return operand;
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}
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return {};
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}
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static Value convertScalarToFpDtype(ImplicitLocOpBuilder &b, Value operand,
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FloatType toType, bool isUnsigned) {
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// If operand is integer, cast directly to the float type.
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// Note that it is unclear how to cast from BF16<->FP16.
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if (isa<IntegerType>(operand.getType())) {
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if (isUnsigned)
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return b.create<arith::UIToFPOp>(toType, operand);
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return b.create<arith::SIToFPOp>(toType, operand);
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}
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if (auto fromFpTy = dyn_cast<FloatType>(operand.getType())) {
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if (toType.getWidth() > fromFpTy.getWidth())
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return b.create<arith::ExtFOp>(toType, operand);
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if (toType.getWidth() < fromFpTy.getWidth())
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return b.create<arith::TruncFOp>(toType, operand);
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return operand;
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}
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return {};
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}
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static Value convertScalarToComplexDtype(ImplicitLocOpBuilder &b, Value operand,
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ComplexType targetType,
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bool isUnsigned) {
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if (auto fromComplexType = dyn_cast<ComplexType>(operand.getType())) {
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if (isa<FloatType>(targetType.getElementType()) &&
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isa<FloatType>(fromComplexType.getElementType())) {
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Value real = b.create<complex::ReOp>(operand);
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Value imag = b.create<complex::ImOp>(operand);
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Type targetETy = targetType.getElementType();
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if (targetType.getElementType().getIntOrFloatBitWidth() <
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fromComplexType.getElementType().getIntOrFloatBitWidth()) {
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real = b.create<arith::TruncFOp>(targetETy, real);
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imag = b.create<arith::TruncFOp>(targetETy, imag);
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} else {
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real = b.create<arith::ExtFOp>(targetETy, real);
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imag = b.create<arith::ExtFOp>(targetETy, imag);
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}
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return b.create<complex::CreateOp>(targetType, real, imag);
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}
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}
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if (dyn_cast<FloatType>(operand.getType())) {
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FloatType toFpTy = cast<FloatType>(targetType.getElementType());
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auto toBitwidth = toFpTy.getIntOrFloatBitWidth();
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Value from = operand;
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if (from.getType().getIntOrFloatBitWidth() < toBitwidth) {
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from = b.create<arith::ExtFOp>(toFpTy, from);
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}
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if (from.getType().getIntOrFloatBitWidth() > toBitwidth) {
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from = b.create<arith::TruncFOp>(toFpTy, from);
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}
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Value zero = b.create<mlir::arith::ConstantFloatOp>(
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mlir::APFloat(toFpTy.getFloatSemantics(), 0), toFpTy);
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return b.create<complex::CreateOp>(targetType, from, zero);
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}
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if (dyn_cast<IntegerType>(operand.getType())) {
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FloatType toFpTy = cast<FloatType>(targetType.getElementType());
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Value from = operand;
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if (isUnsigned) {
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from = b.create<arith::UIToFPOp>(toFpTy, from);
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} else {
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from = b.create<arith::SIToFPOp>(toFpTy, from);
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}
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Value zero = b.create<mlir::arith::ConstantFloatOp>(
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mlir::APFloat(toFpTy.getFloatSemantics(), 0), toFpTy);
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return b.create<complex::CreateOp>(targetType, from, zero);
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}
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return {};
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}
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Value mlir::convertScalarToDtype(OpBuilder &b, Location loc, Value operand,
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Type toType, bool isUnsignedCast) {
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if (operand.getType() == toType)
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return operand;
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ImplicitLocOpBuilder ib(loc, b);
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Value result;
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if (auto intTy = dyn_cast<IntegerType>(toType)) {
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result = convertScalarToIntDtype(ib, operand, intTy, isUnsignedCast);
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} else if (auto floatTy = dyn_cast<FloatType>(toType)) {
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result = convertScalarToFpDtype(ib, operand, floatTy, isUnsignedCast);
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} else if (auto complexTy = dyn_cast<ComplexType>(toType)) {
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result =
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convertScalarToComplexDtype(ib, operand, complexTy, isUnsignedCast);
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}
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if (result)
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return result;
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emitWarning(loc) << "could not cast operand of type " << operand.getType()
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<< " to " << toType;
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return operand;
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}
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SmallVector<Value>
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mlir::getValueOrCreateConstantIndexOp(OpBuilder &b, Location loc,
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ArrayRef<OpFoldResult> valueOrAttrVec) {
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return llvm::to_vector<4>(
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llvm::map_range(valueOrAttrVec, [&](OpFoldResult value) -> Value {
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return getValueOrCreateConstantIndexOp(b, loc, value);
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}));
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}
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Value mlir::createScalarOrSplatConstant(OpBuilder &builder, Location loc,
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Type type, const APInt &value) {
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TypedAttr attr;
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if (isa<IntegerType>(type)) {
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attr = builder.getIntegerAttr(type, value);
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} else {
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auto vecTy = cast<ShapedType>(type);
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attr = SplatElementsAttr::get(vecTy, value);
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}
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return builder.create<arith::ConstantOp>(loc, attr);
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}
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Value mlir::createScalarOrSplatConstant(OpBuilder &builder, Location loc,
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Type type, int64_t value) {
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unsigned elementBitWidth = 0;
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if (auto intTy = dyn_cast<IntegerType>(type))
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elementBitWidth = intTy.getWidth();
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else
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elementBitWidth = cast<ShapedType>(type).getElementTypeBitWidth();
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return createScalarOrSplatConstant(builder, loc, type,
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APInt(elementBitWidth, value));
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}
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Value mlir::createScalarOrSplatConstant(OpBuilder &builder, Location loc,
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Type type, const APFloat &value) {
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if (isa<FloatType>(type))
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return builder.createOrFold<arith::ConstantOp>(
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loc, type, builder.getFloatAttr(type, value));
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TypedAttr splat = SplatElementsAttr::get(cast<ShapedType>(type), value);
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return builder.createOrFold<arith::ConstantOp>(loc, type, splat);
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}
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Value ArithBuilder::_and(Value lhs, Value rhs) {
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return b.create<arith::AndIOp>(loc, lhs, rhs);
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}
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Value ArithBuilder::add(Value lhs, Value rhs) {
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if (isa<FloatType>(lhs.getType()))
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return b.create<arith::AddFOp>(loc, lhs, rhs);
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return b.create<arith::AddIOp>(loc, lhs, rhs);
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}
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Value ArithBuilder::sub(Value lhs, Value rhs) {
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if (isa<FloatType>(lhs.getType()))
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return b.create<arith::SubFOp>(loc, lhs, rhs);
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return b.create<arith::SubIOp>(loc, lhs, rhs);
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}
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Value ArithBuilder::mul(Value lhs, Value rhs) {
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if (isa<FloatType>(lhs.getType()))
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return b.create<arith::MulFOp>(loc, lhs, rhs);
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return b.create<arith::MulIOp>(loc, lhs, rhs);
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}
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Value ArithBuilder::sgt(Value lhs, Value rhs) {
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if (isa<FloatType>(lhs.getType()))
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return b.create<arith::CmpFOp>(loc, arith::CmpFPredicate::OGT, lhs, rhs);
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return b.create<arith::CmpIOp>(loc, arith::CmpIPredicate::sgt, lhs, rhs);
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}
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Value ArithBuilder::slt(Value lhs, Value rhs) {
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if (isa<FloatType>(lhs.getType()))
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return b.create<arith::CmpFOp>(loc, arith::CmpFPredicate::OLT, lhs, rhs);
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return b.create<arith::CmpIOp>(loc, arith::CmpIPredicate::slt, lhs, rhs);
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}
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Value ArithBuilder::select(Value cmp, Value lhs, Value rhs) {
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return b.create<arith::SelectOp>(loc, cmp, lhs, rhs);
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}
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