1//===-- llvm/Support/CodeGen.h - CodeGen Concepts ---------------*- 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//
9// This file define some types which define code generation concepts. For
10// example, relocation model.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_SUPPORT_CODEGEN_H
15#define LLVM_SUPPORT_CODEGEN_H
16
17namespace llvm {
18
19 // Relocation model types.
20 namespace Reloc {
21 // Cannot be named PIC due to collision with -DPIC
22 enum Model { Static, PIC_, DynamicNoPIC, ROPI, RWPI, ROPI_RWPI };
23 }
24
25 // Code model types.
26 namespace CodeModel {
27 // Sync changes with CodeGenCWrappers.h.
28 enum Model { Tiny, Small, Kernel, Medium, Large };
29 }
30
31 namespace PICLevel {
32 // This is used to map -fpic/-fPIC.
33 enum Level { NotPIC=0, SmallPIC=1, BigPIC=2 };
34 }
35
36 namespace PIELevel {
37 enum Level { Default=0, Small=1, Large=2 };
38 }
39
40 // TLS models.
41 namespace TLSModel {
42 enum Model {
43 GeneralDynamic,
44 LocalDynamic,
45 InitialExec,
46 LocalExec
47 };
48 }
49
50 // Code generation optimization level.
51 namespace CodeGenOpt {
52 enum Level {
53 None = 0, // -O0
54 Less = 1, // -O1
55 Default = 2, // -O2, -Os
56 Aggressive = 3 // -O3
57 };
58 }
59
60 /// These enums are meant to be passed into addPassesToEmitFile to indicate
61 /// what type of file to emit, and returned by it to indicate what type of
62 /// file could actually be made.
63 enum CodeGenFileType {
64 CGFT_AssemblyFile,
65 CGFT_ObjectFile,
66 CGFT_Null // Do not emit any output.
67 };
68
69 // Specify what functions should keep the frame pointer.
70 enum class FramePointerKind { None, NonLeaf, All };
71
72} // end llvm namespace
73
74#endif
75