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   enum Model { Static, PIC_, DynamicNoPIC, ROPI, RWPI, ROPI_RWPI };
  22   }
  23
  24   // Code model types.
  25   namespace CodeModel {
  26     // Sync changes with CodeGenCWrappers.h.
  27   enum Model { Tiny, Small, Kernel, Medium, Large };
  28   }
  29
  30   namespace PICLevel {
  31     // This is used to map -fpic/-fPIC.
  32     enum Level { NotPIC=0, SmallPIC=1, BigPIC=2 };
  33   }
  34
  35   namespace PIELevel {
  36     enum Level { Default=0, Small=1, Large=2 };
  37   }
  38
  39   // TLS models.
  40   namespace TLSModel {
  41     enum Model {
  42       GeneralDynamic,
  43       LocalDynamic,
  44       InitialExec,
  45       LocalExec
  46     };
  47   }
  48
  49   // Code generation optimization level.
  50   namespace CodeGenOpt {
  51     enum Level {
  52       None = 0,      // -O0
  53       Less = 1,      // -O1
  54       Default = 2,   // -O2, -Os
  55       Aggressive = 3 // -O3
  56     };
  57   }
  58
  59   // Specify effect of frame pointer elimination optimization.
  60   namespace FramePointer {
  61     enum FP {All, NonLeaf, None};
  62   }
  63
  64 }  // end llvm namespace
  65
  66 #endif