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This also adds new interfaces for the fixed- and scalable case: * LLT::fixed_vector * LLT::scalable_vector The strategy for migrating to the new interfaces was as follows: * If the new LLT is a (modified) clone of another LLT, taking the same number of elements, then use LLT::vector(OtherTy.getElementCount()) or if the number of elements is halfed/doubled, it uses .divideCoefficientBy(2) or operator*. That is because there is no reason to specifically restrict the types to 'fixed_vector'. * If the algorithm works on the number of elements (as unsigned), then just use fixed_vector. This will need to be fixed up in the future when modifying the algorithm to also work for scalable vectors, and will need then need additional tests to confirm the behaviour works the same for scalable vectors. * If the test used the '/*Scalable=*/true` flag of LLT::vector, then this is replaced by LLT::scalable_vector. Reviewed By: aemerson Differential Revision: https://reviews.llvm.org/D104451
82 lines
3.1 KiB
C++
82 lines
3.1 KiB
C++
//===- lib/CodeGen/GlobalISel/LegalizerMutations.cpp - Mutations ----------===//
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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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// A library of mutation factories to use for LegalityMutation.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
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using namespace llvm;
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LegalizeMutation LegalizeMutations::changeTo(unsigned TypeIdx, LLT Ty) {
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return
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[=](const LegalityQuery &Query) { return std::make_pair(TypeIdx, Ty); };
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}
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LegalizeMutation LegalizeMutations::changeTo(unsigned TypeIdx,
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unsigned FromTypeIdx) {
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return [=](const LegalityQuery &Query) {
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return std::make_pair(TypeIdx, Query.Types[FromTypeIdx]);
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};
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}
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LegalizeMutation LegalizeMutations::changeElementTo(unsigned TypeIdx,
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unsigned FromTypeIdx) {
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return [=](const LegalityQuery &Query) {
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const LLT OldTy = Query.Types[TypeIdx];
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const LLT NewTy = Query.Types[FromTypeIdx];
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return std::make_pair(TypeIdx, OldTy.changeElementType(NewTy));
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};
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}
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LegalizeMutation LegalizeMutations::changeElementTo(unsigned TypeIdx,
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LLT NewEltTy) {
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return [=](const LegalityQuery &Query) {
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const LLT OldTy = Query.Types[TypeIdx];
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return std::make_pair(TypeIdx, OldTy.changeElementType(NewEltTy));
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};
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}
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LegalizeMutation LegalizeMutations::changeElementSizeTo(unsigned TypeIdx,
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unsigned FromTypeIdx) {
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return [=](const LegalityQuery &Query) {
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const LLT OldTy = Query.Types[TypeIdx];
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const LLT NewTy = Query.Types[FromTypeIdx];
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const LLT NewEltTy = LLT::scalar(NewTy.getScalarSizeInBits());
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return std::make_pair(TypeIdx, OldTy.changeElementType(NewEltTy));
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};
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}
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LegalizeMutation LegalizeMutations::widenScalarOrEltToNextPow2(unsigned TypeIdx,
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unsigned Min) {
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return [=](const LegalityQuery &Query) {
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const LLT Ty = Query.Types[TypeIdx];
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unsigned NewEltSizeInBits =
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std::max(1u << Log2_32_Ceil(Ty.getScalarSizeInBits()), Min);
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return std::make_pair(TypeIdx, Ty.changeElementSize(NewEltSizeInBits));
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};
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}
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LegalizeMutation LegalizeMutations::moreElementsToNextPow2(unsigned TypeIdx,
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unsigned Min) {
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return [=](const LegalityQuery &Query) {
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const LLT VecTy = Query.Types[TypeIdx];
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unsigned NewNumElements =
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std::max(1u << Log2_32_Ceil(VecTy.getNumElements()), Min);
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return std::make_pair(
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TypeIdx, LLT::fixed_vector(NewNumElements, VecTy.getElementType()));
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};
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}
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LegalizeMutation LegalizeMutations::scalarize(unsigned TypeIdx) {
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return [=](const LegalityQuery &Query) {
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return std::make_pair(TypeIdx, Query.Types[TypeIdx].getElementType());
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};
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}
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