1 //===- lib/CodeGen/GlobalISel/LegalizerMutations.cpp - Mutations ----------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // A library of mutation factories to use for LegalityMutation. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/CodeGen/GlobalISel/LegalizerInfo.h" 15 16 using namespace llvm; 17 18 LegalizeMutation LegalizeMutations::changeTo(unsigned TypeIdx, LLT Ty) { 19 return 20 [=](const LegalityQuery &Query) { return std::make_pair(TypeIdx, Ty); }; 21 } 22 23 LegalizeMutation LegalizeMutations::changeTo(unsigned TypeIdx, 24 unsigned FromTypeIdx) { 25 return [=](const LegalityQuery &Query) { 26 return std::make_pair(TypeIdx, Query.Types[FromTypeIdx]); 27 }; 28 } 29 30 LegalizeMutation LegalizeMutations::widenScalarToNextPow2(unsigned TypeIdx, 31 unsigned Min) { 32 return [=](const LegalityQuery &Query) { 33 unsigned NewSizeInBits = 34 1 << Log2_32_Ceil(Query.Types[TypeIdx].getSizeInBits()); 35 if (NewSizeInBits < Min) 36 NewSizeInBits = Min; 37 return std::make_pair(TypeIdx, LLT::scalar(NewSizeInBits)); 38 }; 39 } 40 41 LegalizeMutation LegalizeMutations::moreElementsToNextPow2(unsigned TypeIdx, 42 unsigned Min) { 43 return [=](const LegalityQuery &Query) { 44 const LLT &VecTy = Query.Types[TypeIdx]; 45 unsigned NewNumElements = 1 << Log2_32_Ceil(VecTy.getNumElements()); 46 if (NewNumElements < Min) 47 NewNumElements = Min; 48 return std::make_pair( 49 TypeIdx, LLT::vector(NewNumElements, VecTy.getScalarSizeInBits())); 50 }; 51 } 52
