CommandFlags.h revision 05bc091336fa31dd0fe62058ae273900d9f8c8ec 
1//===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains codegen-specific flags that are shared between different
11// command line tools. The tools "llc" and "opt" both use this file to prevent
12// flag duplication.
13//
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_CODEGEN_COMMAND_LINE_FLAGS_H
17#define LLVM_CODEGEN_COMMAND_LINE_FLAGS_H
18
19#include "llvm/Support/CodeGen.h"
20#include "llvm/Support/CommandLine.h"
21#include "llvm/Target/TargetMachine.h"
22#include <string>
23using namespace llvm;
24
25cl::opt<std::string>
26MArch("march", cl::desc("Architecture to generate code for (see --version)"));
27
28cl::opt<std::string>
29MCPU("mcpu",
30     cl::desc("Target a specific cpu type (-mcpu=help for details)"),
31     cl::value_desc("cpu-name"),
32     cl::init(""));
33
34cl::list<std::string>
35MAttrs("mattr",
36       cl::CommaSeparated,
37       cl::desc("Target specific attributes (-mattr=help for details)"),
38       cl::value_desc("a1,+a2,-a3,..."));
39
40cl::opt<Reloc::Model>
41RelocModel("relocation-model",
42           cl::desc("Choose relocation model"),
43           cl::init(Reloc::Default),
44           cl::values(
45              clEnumValN(Reloc::Default, "default",
46                      "Target default relocation model"),
47              clEnumValN(Reloc::Static, "static",
48                      "Non-relocatable code"),
49              clEnumValN(Reloc::PIC_, "pic",
50                      "Fully relocatable, position independent code"),
51              clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
52                      "Relocatable external references, non-relocatable code"),
53              clEnumValEnd));
54
55cl::opt<llvm::CodeModel::Model>
56CMModel("code-model",
57        cl::desc("Choose code model"),
58        cl::init(CodeModel::Default),
59        cl::values(clEnumValN(CodeModel::Default, "default",
60                              "Target default code model"),
61                   clEnumValN(CodeModel::Small, "small",
62                              "Small code model"),
63                   clEnumValN(CodeModel::Kernel, "kernel",
64                              "Kernel code model"),
65                   clEnumValN(CodeModel::Medium, "medium",
66                              "Medium code model"),
67                   clEnumValN(CodeModel::Large, "large",
68                              "Large code model"),
69                   clEnumValEnd));
70
71cl::opt<bool>
72RelaxAll("mc-relax-all",
73         cl::desc("When used with filetype=obj, "
74                  "relax all fixups in the emitted object file"));
75
76cl::opt<TargetMachine::CodeGenFileType>
77FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
78  cl::desc("Choose a file type (not all types are supported by all targets):"),
79  cl::values(
80             clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
81                        "Emit an assembly ('.s') file"),
82             clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
83                        "Emit a native object ('.o') file"),
84             clEnumValN(TargetMachine::CGFT_Null, "null",
85                        "Emit nothing, for performance testing"),
86             clEnumValEnd));
87
88cl::opt<bool> DisableDotLoc("disable-dot-loc", cl::Hidden,
89                            cl::desc("Do not use .loc entries"));
90
91cl::opt<bool> DisableCFI("disable-cfi", cl::Hidden,
92                         cl::desc("Do not use .cfi_* directives"));
93
94cl::opt<bool> EnableDwarfDirectory("enable-dwarf-directory", cl::Hidden,
95                  cl::desc("Use .file directives with an explicit directory."));
96
97cl::opt<bool>
98DisableRedZone("disable-red-zone",
99               cl::desc("Do not emit code that uses the red zone."),
100               cl::init(false));
101
102cl::opt<bool>
103EnableFPMAD("enable-fp-mad",
104            cl::desc("Enable less precise MAD instructions to be generated"),
105            cl::init(false));
106
107cl::opt<bool>
108DisableFPElim("disable-fp-elim",
109              cl::desc("Disable frame pointer elimination optimization"),
110              cl::init(false));
111
112cl::opt<bool>
113DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
114  cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"),
115  cl::init(false));
116
117cl::opt<bool>
118EnableUnsafeFPMath("enable-unsafe-fp-math",
119                cl::desc("Enable optimizations that may decrease FP precision"),
120                cl::init(false));
121
122cl::opt<bool>
123EnableNoInfsFPMath("enable-no-infs-fp-math",
124                cl::desc("Enable FP math optimizations that assume no +-Infs"),
125                cl::init(false));
126
127cl::opt<bool>
128EnableNoNaNsFPMath("enable-no-nans-fp-math",
129                   cl::desc("Enable FP math optimizations that assume no NaNs"),
130                   cl::init(false));
131
132cl::opt<bool>
133EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
134      cl::Hidden,
135      cl::desc("Force codegen to assume rounding mode can change dynamically"),
136      cl::init(false));
137
138cl::opt<bool>
139GenerateSoftFloatCalls("soft-float",
140                    cl::desc("Generate software floating point library calls"),
141                    cl::init(false));
142
143cl::opt<llvm::FloatABI::ABIType>
144FloatABIForCalls("float-abi",
145                 cl::desc("Choose float ABI type"),
146                 cl::init(FloatABI::Default),
147                 cl::values(
148                     clEnumValN(FloatABI::Default, "default",
149                                "Target default float ABI type"),
150                     clEnumValN(FloatABI::Soft, "soft",
151                                "Soft float ABI (implied by -soft-float)"),
152                     clEnumValN(FloatABI::Hard, "hard",
153                                "Hard float ABI (uses FP registers)"),
154                     clEnumValEnd));
155
156cl::opt<llvm::FPOpFusion::FPOpFusionMode>
157FuseFPOps("fp-contract",
158          cl::desc("Enable aggresive formation of fused FP ops"),
159          cl::init(FPOpFusion::Standard),
160          cl::values(
161              clEnumValN(FPOpFusion::Fast, "fast",
162                         "Fuse FP ops whenever profitable"),
163              clEnumValN(FPOpFusion::Standard, "on",
164                         "Only fuse 'blessed' FP ops."),
165              clEnumValN(FPOpFusion::Strict, "off",
166                         "Only fuse FP ops when the result won't be effected."),
167              clEnumValEnd));
168
169cl::opt<bool>
170DontPlaceZerosInBSS("nozero-initialized-in-bss",
171              cl::desc("Don't place zero-initialized symbols into bss section"),
172              cl::init(false));
173
174cl::opt<bool>
175EnableGuaranteedTailCallOpt("tailcallopt",
176  cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
177  cl::init(false));
178
179cl::opt<bool>
180DisableTailCalls("disable-tail-calls",
181                 cl::desc("Never emit tail calls"),
182                 cl::init(false));
183
184cl::opt<unsigned>
185OverrideStackAlignment("stack-alignment",
186                       cl::desc("Override default stack alignment"),
187                       cl::init(0));
188
189cl::opt<bool>
190EnableRealignStack("realign-stack",
191                   cl::desc("Realign stack if needed"),
192                   cl::init(true));
193
194cl::opt<std::string>
195TrapFuncName("trap-func", cl::Hidden,
196        cl::desc("Emit a call to trap function rather than a trap instruction"),
197        cl::init(""));
198
199cl::opt<bool>
200EnablePIE("enable-pie",
201          cl::desc("Assume the creation of a position independent executable."),
202          cl::init(false));
203
204cl::opt<bool>
205SegmentedStacks("segmented-stacks",
206                cl::desc("Use segmented stacks if possible."),
207                cl::init(false));
208
209cl::opt<bool>
210UseInitArray("use-init-array",
211             cl::desc("Use .init_array instead of .ctors."),
212             cl::init(false));
213
214cl::opt<std::string> StopAfter("stop-after",
215                            cl::desc("Stop compilation after a specific pass"),
216                            cl::value_desc("pass-name"),
217                                      cl::init(""));
218cl::opt<std::string> StartAfter("start-after",
219                          cl::desc("Resume compilation after a specific pass"),
220                          cl::value_desc("pass-name"),
221                          cl::init(""));
222
223cl::opt<unsigned>
224SSPBufferSize("stack-protector-buffer-size", cl::init(8),
225              cl::desc("Lower bound for a buffer to be considered for "
226                       "stack protection"));
227#endif
228