1 //== llvm/CodeGen/LowLevelType.h ------------------------------- -*- C++ -*-==// 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 /// \file 9 /// Implement a low-level type suitable for MachineInstr level instruction 10 /// selection. 11 /// 12 /// This provides the CodeGen aspects of LowLevelType, such as Type conversion. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CODEGEN_LOWLEVELTYPE_H 17 #define LLVM_CODEGEN_LOWLEVELTYPE_H 18 19 #include "llvm/CodeGen/ValueTypes.h" 20 #include "llvm/Support/LowLevelTypeImpl.h" 21 22 namespace llvm { 23 24 class DataLayout; 25 class Type; 26 struct fltSemantics; 27 28 /// Construct a low-level type based on an LLVM type. 29 LLT getLLTForType(Type &Ty, const DataLayout &DL); 30 31 /// Get a rough equivalent of an MVT for a given LLT. MVT can't distinguish 32 /// pointers, so these will convert to a plain integer. 33 MVT getMVTForLLT(LLT Ty); 34 EVT getApproximateEVTForLLT(LLT Ty, const DataLayout &DL, LLVMContext &Ctx); 35 36 /// Get a rough equivalent of an LLT for a given MVT. LLT does not yet support 37 /// scalarable vector types, and will assert if used. 38 LLT getLLTForMVT(MVT Ty); 39 40 /// Get the appropriate floating point arithmetic semantic based on the bit size 41 /// of the given scalar LLT. 42 const llvm::fltSemantics &getFltSemanticForLLT(LLT Ty); 43 } 44 45 #endif // LLVM_CODEGEN_LOWLEVELTYPE_H 46