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 /// 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