Yi Kong | 878f994 | 2023-12-13 12:55:04 +0900 | [diff] [blame^] | 1 | //== llvm/CodeGen/LowLevelTypeUtils.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_LOWLEVELTYPEUTILS_H |
| 17 | #define LLVM_CODEGEN_LOWLEVELTYPEUTILS_H |
| 18 | |
| 19 | #include "llvm/CodeGen/LowLevelType.h" |
| 20 | #include "llvm/CodeGen/ValueTypes.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_LOWLEVELTYPEUTILS_H |