include/llvm/Support/CodeGen.h

   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
  17 namespace 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   // Specify effect of frame pointer elimination optimization.
  61   namespace FramePointer {
  62     enum FP {All, NonLeaf, None};
  63   }
  64
  65 }  // end llvm namespace
  66
  67 #endif