CommandFlags.h revision 61fc8d670f1e991804c2ab753e567981e60962cb 
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_COMMANDFLAGS_H
17#define LLVM_CODEGEN_COMMANDFLAGS_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>
113EnableUnsafeFPMath("enable-unsafe-fp-math",
114                cl::desc("Enable optimizations that may decrease FP precision"),
115                cl::init(false));
116
117cl::opt<bool>
118EnableNoInfsFPMath("enable-no-infs-fp-math",
119                cl::desc("Enable FP math optimizations that assume no +-Infs"),
120                cl::init(false));
121
122cl::opt<bool>
123EnableNoNaNsFPMath("enable-no-nans-fp-math",
124                   cl::desc("Enable FP math optimizations that assume no NaNs"),
125                   cl::init(false));
126
127cl::opt<bool>
128EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
129      cl::Hidden,
130      cl::desc("Force codegen to assume rounding mode can change dynamically"),
131      cl::init(false));
132
133cl::opt<bool>
134GenerateSoftFloatCalls("soft-float",
135                    cl::desc("Generate software floating point library calls"),
136                    cl::init(false));
137
138cl::opt<llvm::FloatABI::ABIType>
139FloatABIForCalls("float-abi",
140                 cl::desc("Choose float ABI type"),
141                 cl::init(FloatABI::Default),
142                 cl::values(
143                     clEnumValN(FloatABI::Default, "default",
144                                "Target default float ABI type"),
145                     clEnumValN(FloatABI::Soft, "soft",
146                                "Soft float ABI (implied by -soft-float)"),
147                     clEnumValN(FloatABI::Hard, "hard",
148                                "Hard float ABI (uses FP registers)"),
149                     clEnumValEnd));
150
151cl::opt<llvm::FPOpFusion::FPOpFusionMode>
152FuseFPOps("fp-contract",
153          cl::desc("Enable aggresive formation of fused FP ops"),
154          cl::init(FPOpFusion::Standard),
155          cl::values(
156              clEnumValN(FPOpFusion::Fast, "fast",
157                         "Fuse FP ops whenever profitable"),
158              clEnumValN(FPOpFusion::Standard, "on",
159                         "Only fuse 'blessed' FP ops."),
160              clEnumValN(FPOpFusion::Strict, "off",
161                         "Only fuse FP ops when the result won't be effected."),
162              clEnumValEnd));
163
164cl::opt<bool>
165DontPlaceZerosInBSS("nozero-initialized-in-bss",
166              cl::desc("Don't place zero-initialized symbols into bss section"),
167              cl::init(false));
168
169cl::opt<bool>
170EnableGuaranteedTailCallOpt("tailcallopt",
171  cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
172  cl::init(false));
173
174cl::opt<bool>
175DisableTailCalls("disable-tail-calls",
176                 cl::desc("Never emit tail calls"),
177                 cl::init(false));
178
179cl::opt<unsigned>
180OverrideStackAlignment("stack-alignment",
181                       cl::desc("Override default stack alignment"),
182                       cl::init(0));
183
184cl::opt<std::string>
185TrapFuncName("trap-func", cl::Hidden,
186        cl::desc("Emit a call to trap function rather than a trap instruction"),
187        cl::init(""));
188
189cl::opt<bool>
190EnablePIE("enable-pie",
191          cl::desc("Assume the creation of a position independent executable."),
192          cl::init(false));
193
194cl::opt<bool>
195SegmentedStacks("segmented-stacks",
196                cl::desc("Use segmented stacks if possible."),
197                cl::init(false));
198
199cl::opt<bool>
200UseInitArray("use-init-array",
201             cl::desc("Use .init_array instead of .ctors."),
202             cl::init(false));
203
204cl::opt<std::string> StopAfter("stop-after",
205                            cl::desc("Stop compilation after a specific pass"),
206                            cl::value_desc("pass-name"),
207                                      cl::init(""));
208cl::opt<std::string> StartAfter("start-after",
209                          cl::desc("Resume compilation after a specific pass"),
210                          cl::value_desc("pass-name"),
211                          cl::init(""));
212
213#endif
214