1 //===-- llvm/CodeGen/LowLevelType.cpp -------------------------------------===// 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 /// \file This file implements the more header-heavy bits of the LLT class to 11 /// avoid polluting users' namespaces. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/CodeGen/LowLevelType.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 getLLTForType(Type & Ty,const DataLayout & DL)21LLT llvm::getLLTForType(Type &Ty, const DataLayout &DL) { 22 if (auto VTy = dyn_cast<VectorType>(&Ty)) { 23 auto NumElements = VTy->getNumElements(); 24 LLT ScalarTy = getLLTForType(*VTy->getElementType(), DL); 25 if (NumElements == 1) 26 return ScalarTy; 27 return LLT::vector(NumElements, ScalarTy); 28 } else if (auto PTy = dyn_cast<PointerType>(&Ty)) { 29 return LLT::pointer(PTy->getAddressSpace(), DL.getTypeSizeInBits(&Ty)); 30 } else if (Ty.isSized()) { 31 // Aggregates are no different from real scalars as far as GlobalISel is 32 // concerned. 33 auto SizeInBits = DL.getTypeSizeInBits(&Ty); 34 assert(SizeInBits != 0 && "invalid zero-sized type"); 35 return LLT::scalar(SizeInBits); 36 } 37 return LLT(); 38 } 39