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0b943e2bc4
Lower is slightly odd. It often doesn't change the type but the lowerings do use the new type to decide what code to create. Treat it like a mutation but provide convenience functions that re-use the existing type. Re-uses the existing tests: test/CodeGen/AArch64/GlobalISel/legalize-rem.mir test/CodeGen/AArch64/GlobalISel//legalize-mul.mir test/CodeGen/AArch64/GlobalISel//legalize-cmpxchg-with-success.mir git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329623 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
//===- lib/CodeGen/GlobalISel/LegalizerMutations.cpp - Mutations ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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::widenScalarToNextPow2(unsigned TypeIdx,
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unsigned Min) {
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return [=](const LegalityQuery &Query) {
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unsigned NewSizeInBits =
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1 << Log2_32_Ceil(Query.Types[TypeIdx].getSizeInBits());
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if (NewSizeInBits < Min)
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NewSizeInBits = Min;
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return std::make_pair(TypeIdx, LLT::scalar(NewSizeInBits));
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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 = 1 << Log2_32_Ceil(VecTy.getNumElements());
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if (NewNumElements < Min)
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NewNumElements = Min;
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return std::make_pair(
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TypeIdx, LLT::vector(NewNumElements, VecTy.getScalarSizeInBits()));
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};
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}
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