CodeGen.h revision 360784 
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 effect of frame pointer elimination optimization.
70  namespace FramePointer {
71    enum FP {All, NonLeaf, None};
72  }
73
74}  // end llvm namespace
75
76#endif
77