1 //===-- llvm/CodeGen/LowLevelType.cpp -------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 /// \file This file implements the more header-heavy bits of the LLT class to 10 /// avoid polluting users' namespaces. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/CodeGen/LowLevelType.h" 15 #include "llvm/ADT/APFloat.h" 16 #include "llvm/IR/DataLayout.h" 17 #include "llvm/IR/DerivedTypes.h" 18 #include "llvm/Support/raw_ostream.h" 19 using namespace llvm; 20 21 LLT llvm::getLLTForType(Type &Ty, const DataLayout &DL) { 22 if (auto VTy = dyn_cast<VectorType>(&Ty)) { 23 auto EC = VTy->getElementCount(); 24 LLT ScalarTy = getLLTForType(*VTy->getElementType(), DL); 25 if (EC.isScalar()) 26 return ScalarTy; 27 return LLT::vector(EC, ScalarTy); 28 } 29 30 if (auto PTy = dyn_cast<PointerType>(&Ty)) { 31 unsigned AddrSpace = PTy->getAddressSpace(); 32 return LLT::pointer(AddrSpace, DL.getPointerSizeInBits(AddrSpace)); 33 } 34 35 if (Ty.isSized()) { 36 // Aggregates are no different from real scalars as far as GlobalISel is 37 // concerned. 38 auto SizeInBits = DL.getTypeSizeInBits(&Ty); 39 assert(SizeInBits != 0 && "invalid zero-sized type"); 40 return LLT::scalar(SizeInBits); 41 } 42 43 return LLT(); 44 } 45 46 MVT llvm::getMVTForLLT(LLT Ty) { 47 if (!Ty.isVector()) 48 return MVT::getIntegerVT(Ty.getSizeInBits()); 49 50 return MVT::getVectorVT( 51 MVT::getIntegerVT(Ty.getElementType().getSizeInBits()), 52 Ty.getNumElements()); 53 } 54 55 EVT llvm::getApproximateEVTForLLT(LLT Ty, const DataLayout &DL, 56 LLVMContext &Ctx) { 57 if (Ty.isVector()) { 58 EVT EltVT = getApproximateEVTForLLT(Ty.getElementType(), DL, Ctx); 59 return EVT::getVectorVT(Ctx, EltVT, Ty.getElementCount()); 60 } 61 62 return EVT::getIntegerVT(Ctx, Ty.getSizeInBits()); 63 } 64 65 LLT llvm::getLLTForMVT(MVT Ty) { 66 if (!Ty.isVector()) 67 return LLT::scalar(Ty.getSizeInBits()); 68 69 return LLT::scalarOrVector(Ty.getVectorElementCount(), 70 Ty.getVectorElementType().getSizeInBits()); 71 } 72 73 const llvm::fltSemantics &llvm::getFltSemanticForLLT(LLT Ty) { 74 assert(Ty.isScalar() && "Expected a scalar type."); 75 switch (Ty.getSizeInBits()) { 76 case 16: 77 return APFloat::IEEEhalf(); 78 case 32: 79 return APFloat::IEEEsingle(); 80 case 64: 81 return APFloat::IEEEdouble(); 82 case 128: 83 return APFloat::IEEEquad(); 84 } 85 llvm_unreachable("Invalid FP type size."); 86 } 87