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
46