aboutsummaryrefslogtreecommitdiffstats
path: root/include/llvm/CodeGen/CommandFlags.h
blob: 973c5954f9ad3a9c34e2cff5ced84cb605012e9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
//===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains codegen-specific flags that are shared between different
// command line tools. The tools "llc" and "opt" both use this file to prevent
// flag duplication.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_COMMANDFLAGS_H
#define LLVM_CODEGEN_COMMANDFLAGS_H

#include "llvm/MC/MCTargetOptionsCommandFlags.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <string>
using namespace llvm;

cl::opt<std::string>
MArch("march", cl::desc("Architecture to generate code for (see --version)"));

cl::opt<std::string>
MCPU("mcpu",
     cl::desc("Target a specific cpu type (-mcpu=help for details)"),
     cl::value_desc("cpu-name"),
     cl::init(""));

cl::list<std::string>
MAttrs("mattr",
       cl::CommaSeparated,
       cl::desc("Target specific attributes (-mattr=help for details)"),
       cl::value_desc("a1,+a2,-a3,..."));

cl::opt<Reloc::Model>
RelocModel("relocation-model",
           cl::desc("Choose relocation model"),
           cl::init(Reloc::Default),
           cl::values(
              clEnumValN(Reloc::Default, "default",
                      "Target default relocation model"),
              clEnumValN(Reloc::Static, "static",
                      "Non-relocatable code"),
              clEnumValN(Reloc::PIC_, "pic",
                      "Fully relocatable, position independent code"),
              clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
                      "Relocatable external references, non-relocatable code"),
              clEnumValEnd));

cl::opt<ThreadModel::Model>
TMModel("thread-model",
        cl::desc("Choose threading model"),
        cl::init(ThreadModel::POSIX),
        cl::values(clEnumValN(ThreadModel::POSIX, "posix",
                              "POSIX thread model"),
                   clEnumValN(ThreadModel::Single, "single",
                              "Single thread model"),
                   clEnumValEnd));

cl::opt<llvm::CodeModel::Model>
CMModel("code-model",
        cl::desc("Choose code model"),
        cl::init(CodeModel::Default),
        cl::values(clEnumValN(CodeModel::Default, "default",
                              "Target default code model"),
                   clEnumValN(CodeModel::Small, "small",
                              "Small code model"),
                   clEnumValN(CodeModel::Kernel, "kernel",
                              "Kernel code model"),
                   clEnumValN(CodeModel::Medium, "medium",
                              "Medium code model"),
                   clEnumValN(CodeModel::Large, "large",
                              "Large code model"),
                   clEnumValEnd));

cl::opt<TargetMachine::CodeGenFileType>
FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
  cl::desc("Choose a file type (not all types are supported by all targets):"),
  cl::values(
             clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
                        "Emit an assembly ('.s') file"),
             clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
                        "Emit a native object ('.o') file"),
             clEnumValN(TargetMachine::CGFT_Null, "null",
                        "Emit nothing, for performance testing"),
             clEnumValEnd));

cl::opt<bool>
EnableFPMAD("enable-fp-mad",
            cl::desc("Enable less precise MAD instructions to be generated"),
            cl::init(false));

cl::opt<bool>
DisableFPElim("disable-fp-elim",
              cl::desc("Disable frame pointer elimination optimization"),
              cl::init(false));

cl::opt<bool>
EnableUnsafeFPMath("enable-unsafe-fp-math",
                cl::desc("Enable optimizations that may decrease FP precision"),
                cl::init(false));

cl::opt<bool>
EnableNoInfsFPMath("enable-no-infs-fp-math",
                cl::desc("Enable FP math optimizations that assume no +-Infs"),
                cl::init(false));

cl::opt<bool>
EnableNoNaNsFPMath("enable-no-nans-fp-math",
                   cl::desc("Enable FP math optimizations that assume no NaNs"),
                   cl::init(false));

cl::opt<bool>
EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
      cl::Hidden,
      cl::desc("Force codegen to assume rounding mode can change dynamically"),
      cl::init(false));

cl::opt<bool>
GenerateSoftFloatCalls("soft-float",
                    cl::desc("Generate software floating point library calls"),
                    cl::init(false));

cl::opt<llvm::FloatABI::ABIType>
FloatABIForCalls("float-abi",
                 cl::desc("Choose float ABI type"),
                 cl::init(FloatABI::Default),
                 cl::values(
                     clEnumValN(FloatABI::Default, "default",
                                "Target default float ABI type"),
                     clEnumValN(FloatABI::Soft, "soft",
                                "Soft float ABI (implied by -soft-float)"),
                     clEnumValN(FloatABI::Hard, "hard",
                                "Hard float ABI (uses FP registers)"),
                     clEnumValEnd));

cl::opt<llvm::FPOpFusion::FPOpFusionMode>
FuseFPOps("fp-contract",
          cl::desc("Enable aggressive formation of fused FP ops"),
          cl::init(FPOpFusion::Standard),
          cl::values(
              clEnumValN(FPOpFusion::Fast, "fast",
                         "Fuse FP ops whenever profitable"),
              clEnumValN(FPOpFusion::Standard, "on",
                         "Only fuse 'blessed' FP ops."),
              clEnumValN(FPOpFusion::Strict, "off",
                         "Only fuse FP ops when the result won't be effected."),
              clEnumValEnd));

cl::opt<bool>
DontPlaceZerosInBSS("nozero-initialized-in-bss",
              cl::desc("Don't place zero-initialized symbols into bss section"),
              cl::init(false));

cl::opt<bool>
EnableGuaranteedTailCallOpt("tailcallopt",
  cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
  cl::init(false));

cl::opt<bool>
DisableTailCalls("disable-tail-calls",
                 cl::desc("Never emit tail calls"),
                 cl::init(false));

cl::opt<unsigned>
OverrideStackAlignment("stack-alignment",
                       cl::desc("Override default stack alignment"),
                       cl::init(0));

cl::opt<std::string>
TrapFuncName("trap-func", cl::Hidden,
        cl::desc("Emit a call to trap function rather than a trap instruction"),
        cl::init(""));

cl::opt<bool>
EnablePIE("enable-pie",
          cl::desc("Assume the creation of a position independent executable."),
          cl::init(false));

cl::opt<bool>
UseCtors("use-ctors",
             cl::desc("Use .ctors instead of .init_array."),
             cl::init(false));

cl::opt<std::string> StopAfter("stop-after",
                            cl::desc("Stop compilation after a specific pass"),
                            cl::value_desc("pass-name"),
                                      cl::init(""));
cl::opt<std::string> StartAfter("start-after",
                          cl::desc("Resume compilation after a specific pass"),
                          cl::value_desc("pass-name"),
                          cl::init(""));

cl::opt<bool> DataSections("data-sections",
                           cl::desc("Emit data into separate sections"),
                           cl::init(false));

cl::opt<bool>
FunctionSections("function-sections",
                 cl::desc("Emit functions into separate sections"),
                 cl::init(false));

cl::opt<llvm::JumpTable::JumpTableType>
JTableType("jump-table-type",
          cl::desc("Choose the type of Jump-Instruction Table for jumptable."),
          cl::init(JumpTable::Single),
          cl::values(
              clEnumValN(JumpTable::Single, "single",
                         "Create a single table for all jumptable functions"),
              clEnumValN(JumpTable::Arity, "arity",
                         "Create one table per number of parameters."),
              clEnumValN(JumpTable::Simplified, "simplified",
                         "Create one table per simplified function type."),
              clEnumValN(JumpTable::Full, "full",
                         "Create one table per unique function type."),
              clEnumValEnd));

cl::opt<bool>
FCFI("fcfi",
     cl::desc("Apply forward-edge control-flow integrity"),
     cl::init(false));

cl::opt<llvm::CFIntegrity>
CFIType("cfi-type",
        cl::desc("Choose the type of Control-Flow Integrity check to add"),
        cl::init(CFIntegrity::Sub),
        cl::values(
            clEnumValN(CFIntegrity::Sub, "sub",
                       "Subtract the pointer from the table base, then mask."),
            clEnumValN(CFIntegrity::Ror, "ror",
                       "Use rotate to check the offset from a table base."),
            clEnumValN(CFIntegrity::Add, "add",
                       "Mask out the high bits and add to an aligned base."),
            clEnumValEnd));

cl::opt<bool>
CFIEnforcing("cfi-enforcing",
             cl::desc("Enforce CFI or pass the violation to a function."),
             cl::init(false));

// Note that this option is linked to the cfi-enforcing option above: if
// cfi-enforcing is set, then the cfi-func-name option is entirely ignored. If
// cfi-enforcing is false and no cfi-func-name is set, then a default function
// will be generated that ignores all CFI violations. The expected signature for
// functions called with CFI violations is
//
// void (i8*, i8*)
//
// The first pointer is a C string containing the name of the function in which
// the violation occurs, and the second pointer is the pointer that violated
// CFI.
cl::opt<std::string>
CFIFuncName("cfi-func-name", cl::desc("The name of the CFI function to call"),
            cl::init(""));

// Common utility function tightly tied to the options listed here. Initializes
// a TargetOptions object with CodeGen flags and returns it.
static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
  TargetOptions Options;
  Options.LessPreciseFPMADOption = EnableFPMAD;
  Options.NoFramePointerElim = DisableFPElim;
  Options.AllowFPOpFusion = FuseFPOps;
  Options.UnsafeFPMath = EnableUnsafeFPMath;
  Options.NoInfsFPMath = EnableNoInfsFPMath;
  Options.NoNaNsFPMath = EnableNoNaNsFPMath;
  Options.HonorSignDependentRoundingFPMathOption =
      EnableHonorSignDependentRoundingFPMath;
  Options.UseSoftFloat = GenerateSoftFloatCalls;
  if (FloatABIForCalls != FloatABI::Default)
    Options.FloatABIType = FloatABIForCalls;
  Options.NoZerosInBSS = DontPlaceZerosInBSS;
  Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
  Options.DisableTailCalls = DisableTailCalls;
  Options.StackAlignmentOverride = OverrideStackAlignment;
  Options.TrapFuncName = TrapFuncName;
  Options.PositionIndependentExecutable = EnablePIE;
  Options.UseInitArray = !UseCtors;
  Options.DataSections = DataSections;
  Options.FunctionSections = FunctionSections;

  Options.MCOptions = InitMCTargetOptionsFromFlags();
  Options.JTType = JTableType;
  Options.FCFI = FCFI;
  Options.CFIType = CFIType;
  Options.CFIEnforcing = CFIEnforcing;
  Options.CFIFuncName = CFIFuncName;

  Options.ThreadModel = TMModel;

  return Options;
}

#endif