Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 1 | //===--- BackendUtil.cpp - LLVM Backend Utilities -------------------------===// |
| 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 | |
Daniel Dunbar | 9b414d3 | 2010-06-15 17:48:49 +0000 | [diff] [blame] | 10 | #include "clang/CodeGen/BackendUtil.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 11 | #include "clang/Basic/Diagnostic.h" |
| 12 | #include "clang/Basic/TargetOptions.h" |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 13 | #include "clang/Basic/LangOptions.h" |
Chandler Carruth | 06057ce | 2010-06-15 23:19:56 +0000 | [diff] [blame] | 14 | #include "clang/Frontend/CodeGenOptions.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 15 | #include "clang/Frontend/FrontendDiagnostic.h" |
| 16 | #include "llvm/Module.h" |
| 17 | #include "llvm/PassManager.h" |
Rafael Espindola | cf565c5 | 2011-08-02 21:51:02 +0000 | [diff] [blame] | 18 | #include "llvm/Analysis/Verifier.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 19 | #include "llvm/Assembly/PrintModulePass.h" |
| 20 | #include "llvm/Bitcode/ReaderWriter.h" |
| 21 | #include "llvm/CodeGen/RegAllocRegistry.h" |
| 22 | #include "llvm/CodeGen/SchedulerRegistry.h" |
Evan Cheng | 693769c | 2011-06-29 01:14:32 +0000 | [diff] [blame] | 23 | #include "llvm/MC/SubtargetFeature.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 24 | #include "llvm/Support/CommandLine.h" |
| 25 | #include "llvm/Support/FormattedStream.h" |
| 26 | #include "llvm/Support/PrettyStackTrace.h" |
Evan Cheng | a6b4045 | 2011-08-24 18:09:14 +0000 | [diff] [blame] | 27 | #include "llvm/Support/TargetRegistry.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 28 | #include "llvm/Support/Timer.h" |
| 29 | #include "llvm/Support/raw_ostream.h" |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 30 | #include "llvm/DataLayout.h" |
Rafael Espindola | cf565c5 | 2011-08-02 21:51:02 +0000 | [diff] [blame] | 31 | #include "llvm/Target/TargetLibraryInfo.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 32 | #include "llvm/Target/TargetMachine.h" |
| 33 | #include "llvm/Target/TargetOptions.h" |
Nick Lewycky | e8ba8d7 | 2011-04-21 23:44:07 +0000 | [diff] [blame] | 34 | #include "llvm/Transforms/Instrumentation.h" |
Rafael Espindola | cf565c5 | 2011-08-02 21:51:02 +0000 | [diff] [blame] | 35 | #include "llvm/Transforms/IPO.h" |
| 36 | #include "llvm/Transforms/IPO/PassManagerBuilder.h" |
| 37 | #include "llvm/Transforms/Scalar.h" |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 38 | using namespace clang; |
| 39 | using namespace llvm; |
| 40 | |
| 41 | namespace { |
| 42 | |
| 43 | class EmitAssemblyHelper { |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 44 | DiagnosticsEngine &Diags; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 45 | const CodeGenOptions &CodeGenOpts; |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 46 | const clang::TargetOptions &TargetOpts; |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 47 | const LangOptions &LangOpts; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 48 | Module *TheModule; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 49 | |
| 50 | Timer CodeGenerationTime; |
| 51 | |
Daniel Dunbar | db2f237 | 2010-09-17 07:35:16 +0000 | [diff] [blame] | 52 | mutable PassManager *CodeGenPasses; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 53 | mutable PassManager *PerModulePasses; |
| 54 | mutable FunctionPassManager *PerFunctionPasses; |
| 55 | |
| 56 | private: |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 57 | PassManager *getCodeGenPasses(TargetMachine *TM) const { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 58 | if (!CodeGenPasses) { |
Daniel Dunbar | db2f237 | 2010-09-17 07:35:16 +0000 | [diff] [blame] | 59 | CodeGenPasses = new PassManager(); |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 60 | CodeGenPasses->add(new DataLayout(TheModule)); |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 61 | // Add TargetTransformInfo. |
| 62 | if (TM) { |
| 63 | TargetTransformInfo *TTI = |
| 64 | new TargetTransformInfo(TM->getScalarTargetTransformInfo(), |
| 65 | TM->getVectorTargetTransformInfo()); |
| 66 | CodeGenPasses->add(TTI); |
| 67 | } |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 68 | } |
| 69 | return CodeGenPasses; |
| 70 | } |
| 71 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 72 | PassManager *getPerModulePasses(TargetMachine *TM) const { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 73 | if (!PerModulePasses) { |
| 74 | PerModulePasses = new PassManager(); |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 75 | PerModulePasses->add(new DataLayout(TheModule)); |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 76 | if (TM) { |
| 77 | TargetTransformInfo *TTI = |
| 78 | new TargetTransformInfo(TM->getScalarTargetTransformInfo(), |
| 79 | TM->getVectorTargetTransformInfo()); |
| 80 | PerModulePasses->add(TTI); |
| 81 | } |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 82 | } |
| 83 | return PerModulePasses; |
| 84 | } |
| 85 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 86 | FunctionPassManager *getPerFunctionPasses(TargetMachine *TM) const { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 87 | if (!PerFunctionPasses) { |
| 88 | PerFunctionPasses = new FunctionPassManager(TheModule); |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 89 | PerFunctionPasses->add(new DataLayout(TheModule)); |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 90 | if (TM) { |
| 91 | TargetTransformInfo *TTI = |
| 92 | new TargetTransformInfo(TM->getScalarTargetTransformInfo(), |
| 93 | TM->getVectorTargetTransformInfo()); |
| 94 | PerFunctionPasses->add(TTI); |
| 95 | } |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 96 | } |
| 97 | return PerFunctionPasses; |
| 98 | } |
| 99 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 100 | |
| 101 | void CreatePasses(TargetMachine *TM); |
| 102 | |
| 103 | /// CreateTargetMachine - Generates the TargetMachine. Returns Null |
| 104 | /// if it is unable to create the target machine. |
| 105 | TargetMachine *CreateTargetMachine(); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 106 | |
| 107 | /// AddEmitPasses - Add passes necessary to emit assembly or LLVM IR. |
| 108 | /// |
| 109 | /// \return True on success. |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 110 | bool AddEmitPasses(BackendAction Action, formatted_raw_ostream &OS, |
| 111 | TargetMachine *TM); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 112 | |
| 113 | public: |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 114 | EmitAssemblyHelper(DiagnosticsEngine &_Diags, |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 115 | const CodeGenOptions &CGOpts, |
| 116 | const clang::TargetOptions &TOpts, |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 117 | const LangOptions &LOpts, |
Daniel Dunbar | 05a7f3d | 2010-06-07 23:21:04 +0000 | [diff] [blame] | 118 | Module *M) |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 119 | : Diags(_Diags), CodeGenOpts(CGOpts), TargetOpts(TOpts), LangOpts(LOpts), |
Daniel Dunbar | 05a7f3d | 2010-06-07 23:21:04 +0000 | [diff] [blame] | 120 | TheModule(M), CodeGenerationTime("Code Generation Time"), |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 121 | CodeGenPasses(0), PerModulePasses(0), PerFunctionPasses(0) {} |
| 122 | |
| 123 | ~EmitAssemblyHelper() { |
| 124 | delete CodeGenPasses; |
| 125 | delete PerModulePasses; |
| 126 | delete PerFunctionPasses; |
| 127 | } |
| 128 | |
| 129 | void EmitAssembly(BackendAction Action, raw_ostream *OS); |
| 130 | }; |
| 131 | |
| 132 | } |
| 133 | |
Dan Gohman | a8398ea | 2012-01-17 20:54:51 +0000 | [diff] [blame] | 134 | static void addObjCARCAPElimPass(const PassManagerBuilder &Builder, PassManagerBase &PM) { |
| 135 | if (Builder.OptLevel > 0) |
| 136 | PM.add(createObjCARCAPElimPass()); |
| 137 | } |
| 138 | |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 139 | static void addObjCARCExpandPass(const PassManagerBuilder &Builder, PassManagerBase &PM) { |
| 140 | if (Builder.OptLevel > 0) |
| 141 | PM.add(createObjCARCExpandPass()); |
| 142 | } |
| 143 | |
| 144 | static void addObjCARCOptPass(const PassManagerBuilder &Builder, PassManagerBase &PM) { |
| 145 | if (Builder.OptLevel > 0) |
| 146 | PM.add(createObjCARCOptPass()); |
| 147 | } |
| 148 | |
Nuno Lopes | def1849 | 2012-05-22 17:19:45 +0000 | [diff] [blame] | 149 | static unsigned BoundsChecking; |
| 150 | static void addBoundsCheckingPass(const PassManagerBuilder &Builder, |
| 151 | PassManagerBase &PM) { |
| 152 | PM.add(createBoundsCheckingPass(BoundsChecking)); |
| 153 | } |
| 154 | |
Kostya Serebryany | 1b4eca6 | 2011-11-16 17:34:26 +0000 | [diff] [blame] | 155 | static void addAddressSanitizerPass(const PassManagerBuilder &Builder, |
| 156 | PassManagerBase &PM) { |
| 157 | PM.add(createAddressSanitizerPass()); |
| 158 | } |
| 159 | |
Kostya Serebryany | 3c93122 | 2012-03-01 22:27:08 +0000 | [diff] [blame] | 160 | static void addThreadSanitizerPass(const PassManagerBuilder &Builder, |
| 161 | PassManagerBase &PM) { |
| 162 | PM.add(createThreadSanitizerPass()); |
| 163 | } |
| 164 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 165 | void EmitAssemblyHelper::CreatePasses(TargetMachine *TM) { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 166 | unsigned OptLevel = CodeGenOpts.OptimizationLevel; |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 167 | CodeGenOptions::InliningMethod Inlining = CodeGenOpts.getInlining(); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 168 | |
| 169 | // Handle disabling of LLVM optimization, where we want to preserve the |
| 170 | // internal module before any optimization. |
| 171 | if (CodeGenOpts.DisableLLVMOpts) { |
| 172 | OptLevel = 0; |
| 173 | Inlining = CodeGenOpts.NoInlining; |
| 174 | } |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 175 | |
| 176 | PassManagerBuilder PMBuilder; |
Chris Lattner | 9ca02e5 | 2011-05-21 23:50:44 +0000 | [diff] [blame] | 177 | PMBuilder.OptLevel = OptLevel; |
| 178 | PMBuilder.SizeLevel = CodeGenOpts.OptimizeSize; |
Andrew Trick | 6445d62 | 2011-04-05 18:49:32 +0000 | [diff] [blame] | 179 | |
Chris Lattner | 9ca02e5 | 2011-05-21 23:50:44 +0000 | [diff] [blame] | 180 | PMBuilder.DisableSimplifyLibCalls = !CodeGenOpts.SimplifyLibCalls; |
| 181 | PMBuilder.DisableUnitAtATime = !CodeGenOpts.UnitAtATime; |
| 182 | PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops; |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 183 | |
| 184 | // In ObjC ARC mode, add the main ARC optimization passes. |
| 185 | if (LangOpts.ObjCAutoRefCount) { |
| 186 | PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible, |
| 187 | addObjCARCExpandPass); |
Dan Gohman | a8398ea | 2012-01-17 20:54:51 +0000 | [diff] [blame] | 188 | PMBuilder.addExtension(PassManagerBuilder::EP_ModuleOptimizerEarly, |
| 189 | addObjCARCAPElimPass); |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 190 | PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate, |
| 191 | addObjCARCOptPass); |
| 192 | } |
Kostya Serebryany | 1b4eca6 | 2011-11-16 17:34:26 +0000 | [diff] [blame] | 193 | |
Nuno Lopes | def1849 | 2012-05-22 17:19:45 +0000 | [diff] [blame] | 194 | if (CodeGenOpts.BoundsChecking > 0) { |
| 195 | BoundsChecking = CodeGenOpts.BoundsChecking; |
| 196 | PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate, |
| 197 | addBoundsCheckingPass); |
| 198 | PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0, |
| 199 | addBoundsCheckingPass); |
| 200 | } |
| 201 | |
Kostya Serebryany | b619688 | 2011-11-22 01:28:36 +0000 | [diff] [blame] | 202 | if (LangOpts.AddressSanitizer) { |
Kostya Serebryany | ba1f040 | 2012-10-15 14:22:56 +0000 | [diff] [blame] | 203 | PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast, |
Kostya Serebryany | 1b4eca6 | 2011-11-16 17:34:26 +0000 | [diff] [blame] | 204 | addAddressSanitizerPass); |
Kostya Serebryany | e5dd2ea | 2011-11-30 22:20:21 +0000 | [diff] [blame] | 205 | PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0, |
| 206 | addAddressSanitizerPass); |
Kostya Serebryany | 1b4eca6 | 2011-11-16 17:34:26 +0000 | [diff] [blame] | 207 | } |
Kostya Serebryany | 3c93122 | 2012-03-01 22:27:08 +0000 | [diff] [blame] | 208 | |
| 209 | if (LangOpts.ThreadSanitizer) { |
Kostya Serebryany | e78ec3e | 2012-03-23 23:25:23 +0000 | [diff] [blame] | 210 | PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast, |
Kostya Serebryany | 3c93122 | 2012-03-01 22:27:08 +0000 | [diff] [blame] | 211 | addThreadSanitizerPass); |
| 212 | PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0, |
| 213 | addThreadSanitizerPass); |
| 214 | } |
| 215 | |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 216 | // Figure out TargetLibraryInfo. |
Bill Wendling | 3621b31 | 2011-05-17 23:06:23 +0000 | [diff] [blame] | 217 | Triple TargetTriple(TheModule->getTargetTriple()); |
Chris Lattner | 9ca02e5 | 2011-05-21 23:50:44 +0000 | [diff] [blame] | 218 | PMBuilder.LibraryInfo = new TargetLibraryInfo(TargetTriple); |
Chris Lattner | 98ec3f7 | 2011-02-18 22:34:47 +0000 | [diff] [blame] | 219 | if (!CodeGenOpts.SimplifyLibCalls) |
Chris Lattner | 9ca02e5 | 2011-05-21 23:50:44 +0000 | [diff] [blame] | 220 | PMBuilder.LibraryInfo->disableAllFunctions(); |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 221 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 222 | switch (Inlining) { |
| 223 | case CodeGenOptions::NoInlining: break; |
| 224 | case CodeGenOptions::NormalInlining: { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 225 | // FIXME: Derive these constants in a principled fashion. |
| 226 | unsigned Threshold = 225; |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 227 | if (CodeGenOpts.OptimizeSize == 1) // -Os |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 228 | Threshold = 75; |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 229 | else if (CodeGenOpts.OptimizeSize == 2) // -Oz |
Bob Wilson | a0fa203 | 2011-04-29 22:49:50 +0000 | [diff] [blame] | 230 | Threshold = 25; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 231 | else if (OptLevel > 2) |
| 232 | Threshold = 275; |
Chris Lattner | 9ca02e5 | 2011-05-21 23:50:44 +0000 | [diff] [blame] | 233 | PMBuilder.Inliner = createFunctionInliningPass(Threshold); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 234 | break; |
| 235 | } |
| 236 | case CodeGenOptions::OnlyAlwaysInlining: |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 237 | // Respect always_inline. |
Chad Rosier | 9875962 | 2012-02-25 02:56:13 +0000 | [diff] [blame] | 238 | if (OptLevel == 0) |
| 239 | // Do not insert lifetime intrinsics at -O0. |
| 240 | PMBuilder.Inliner = createAlwaysInlinerPass(false); |
| 241 | else |
| 242 | PMBuilder.Inliner = createAlwaysInlinerPass(); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 243 | break; |
| 244 | } |
| 245 | |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 246 | // Set up the per-function pass manager. |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 247 | FunctionPassManager *FPM = getPerFunctionPasses(TM); |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 248 | if (CodeGenOpts.VerifyModule) |
| 249 | FPM->add(createVerifierPass()); |
| 250 | PMBuilder.populateFunctionPassManager(*FPM); |
Andrew Trick | 6445d62 | 2011-04-05 18:49:32 +0000 | [diff] [blame] | 251 | |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 252 | // Set up the per-module pass manager. |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 253 | PassManager *MPM = getPerModulePasses(TM); |
Chris Lattner | df61976 | 2011-02-18 22:20:38 +0000 | [diff] [blame] | 254 | |
Nick Lewycky | e8ba8d7 | 2011-04-21 23:44:07 +0000 | [diff] [blame] | 255 | if (CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) { |
| 256 | MPM->add(createGCOVProfilerPass(CodeGenOpts.EmitGcovNotes, |
Bill Wendling | 3621b31 | 2011-05-17 23:06:23 +0000 | [diff] [blame] | 257 | CodeGenOpts.EmitGcovArcs, |
| 258 | TargetTriple.isMacOSX())); |
| 259 | |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 260 | if (CodeGenOpts.getDebugInfo() == CodeGenOptions::NoDebugInfo) |
Nick Lewycky | e8ba8d7 | 2011-04-21 23:44:07 +0000 | [diff] [blame] | 261 | MPM->add(createStripSymbolsPass(true)); |
| 262 | } |
Chris Lattner | 33c09d5 | 2011-05-21 20:40:11 +0000 | [diff] [blame] | 263 | |
| 264 | |
| 265 | PMBuilder.populateModulePassManager(*MPM); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 268 | TargetMachine *EmitAssemblyHelper::CreateTargetMachine() { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 269 | // Create the TargetMachine for generating code. |
| 270 | std::string Error; |
| 271 | std::string Triple = TheModule->getTargetTriple(); |
| 272 | const llvm::Target *TheTarget = TargetRegistry::lookupTarget(Triple, Error); |
| 273 | if (!TheTarget) { |
| 274 | Diags.Report(diag::err_fe_unable_to_create_target) << Error; |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 275 | return 0; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | // FIXME: Expose these capabilities via actual APIs!!!! Aside from just |
| 279 | // being gross, this is also totally broken if we ever care about |
| 280 | // concurrency. |
Daniel Dunbar | 1ad6648 | 2010-07-01 01:31:45 +0000 | [diff] [blame] | 281 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 282 | TargetMachine::setAsmVerbosityDefault(CodeGenOpts.AsmVerbose); |
| 283 | |
| 284 | TargetMachine::setFunctionSections(CodeGenOpts.FunctionSections); |
| 285 | TargetMachine::setDataSections (CodeGenOpts.DataSections); |
| 286 | |
| 287 | // FIXME: Parse this earlier. |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 288 | llvm::CodeModel::Model CM; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 289 | if (CodeGenOpts.CodeModel == "small") { |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 290 | CM = llvm::CodeModel::Small; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 291 | } else if (CodeGenOpts.CodeModel == "kernel") { |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 292 | CM = llvm::CodeModel::Kernel; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 293 | } else if (CodeGenOpts.CodeModel == "medium") { |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 294 | CM = llvm::CodeModel::Medium; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 295 | } else if (CodeGenOpts.CodeModel == "large") { |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 296 | CM = llvm::CodeModel::Large; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 297 | } else { |
| 298 | assert(CodeGenOpts.CodeModel.empty() && "Invalid code model!"); |
Benjamin Kramer | 77577ce | 2011-07-20 14:43:06 +0000 | [diff] [blame] | 299 | CM = llvm::CodeModel::Default; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 300 | } |
| 301 | |
David Blaikie | 6bd17d2 | 2012-02-07 19:36:38 +0000 | [diff] [blame] | 302 | SmallVector<const char *, 16> BackendArgs; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 303 | BackendArgs.push_back("clang"); // Fake program name. |
| 304 | if (!CodeGenOpts.DebugPass.empty()) { |
| 305 | BackendArgs.push_back("-debug-pass"); |
| 306 | BackendArgs.push_back(CodeGenOpts.DebugPass.c_str()); |
| 307 | } |
| 308 | if (!CodeGenOpts.LimitFloatPrecision.empty()) { |
| 309 | BackendArgs.push_back("-limit-float-precision"); |
| 310 | BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str()); |
| 311 | } |
| 312 | if (llvm::TimePassesIsEnabled) |
| 313 | BackendArgs.push_back("-time-passes"); |
Daniel Dunbar | 3c66d30 | 2011-03-22 16:48:17 +0000 | [diff] [blame] | 314 | for (unsigned i = 0, e = CodeGenOpts.BackendOptions.size(); i != e; ++i) |
| 315 | BackendArgs.push_back(CodeGenOpts.BackendOptions[i].c_str()); |
Chad Rosier | 1b90605 | 2011-08-26 00:26:29 +0000 | [diff] [blame] | 316 | if (CodeGenOpts.NoGlobalMerge) |
| 317 | BackendArgs.push_back("-global-merge=false"); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 318 | BackendArgs.push_back(0); |
| 319 | llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1, |
David Blaikie | 6bd17d2 | 2012-02-07 19:36:38 +0000 | [diff] [blame] | 320 | BackendArgs.data()); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 321 | |
| 322 | std::string FeaturesStr; |
Evan Cheng | 368691e | 2011-06-30 02:06:32 +0000 | [diff] [blame] | 323 | if (TargetOpts.Features.size()) { |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 324 | SubtargetFeatures Features; |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 325 | for (std::vector<std::string>::const_iterator |
| 326 | it = TargetOpts.Features.begin(), |
| 327 | ie = TargetOpts.Features.end(); it != ie; ++it) |
| 328 | Features.AddFeature(*it); |
| 329 | FeaturesStr = Features.getString(); |
| 330 | } |
Evan Cheng | 2860e30 | 2011-07-19 06:37:41 +0000 | [diff] [blame] | 331 | |
| 332 | llvm::Reloc::Model RM = llvm::Reloc::Default; |
| 333 | if (CodeGenOpts.RelocationModel == "static") { |
| 334 | RM = llvm::Reloc::Static; |
| 335 | } else if (CodeGenOpts.RelocationModel == "pic") { |
| 336 | RM = llvm::Reloc::PIC_; |
| 337 | } else { |
| 338 | assert(CodeGenOpts.RelocationModel == "dynamic-no-pic" && |
| 339 | "Invalid PIC model!"); |
| 340 | RM = llvm::Reloc::DynamicNoPIC; |
| 341 | } |
| 342 | |
Evan Cheng | 9254bf7 | 2011-11-16 08:38:55 +0000 | [diff] [blame] | 343 | CodeGenOpt::Level OptLevel = CodeGenOpt::Default; |
| 344 | switch (CodeGenOpts.OptimizationLevel) { |
| 345 | default: break; |
| 346 | case 0: OptLevel = CodeGenOpt::None; break; |
| 347 | case 3: OptLevel = CodeGenOpt::Aggressive; break; |
| 348 | } |
| 349 | |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 350 | llvm::TargetOptions Options; |
| 351 | |
| 352 | // Set frame pointer elimination mode. |
| 353 | if (!CodeGenOpts.DisableFPElim) { |
| 354 | Options.NoFramePointerElim = false; |
| 355 | Options.NoFramePointerElimNonLeaf = false; |
| 356 | } else if (CodeGenOpts.OmitLeafFramePointer) { |
| 357 | Options.NoFramePointerElim = false; |
| 358 | Options.NoFramePointerElimNonLeaf = true; |
| 359 | } else { |
| 360 | Options.NoFramePointerElim = true; |
| 361 | Options.NoFramePointerElimNonLeaf = true; |
| 362 | } |
| 363 | |
Rafael Espindola | 8af669f | 2012-06-19 01:26:10 +0000 | [diff] [blame] | 364 | if (CodeGenOpts.UseInitArray) |
| 365 | Options.UseInitArray = true; |
| 366 | |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 367 | // Set float ABI type. |
| 368 | if (CodeGenOpts.FloatABI == "soft" || CodeGenOpts.FloatABI == "softfp") |
| 369 | Options.FloatABIType = llvm::FloatABI::Soft; |
| 370 | else if (CodeGenOpts.FloatABI == "hard") |
| 371 | Options.FloatABIType = llvm::FloatABI::Hard; |
| 372 | else { |
| 373 | assert(CodeGenOpts.FloatABI.empty() && "Invalid float abi!"); |
| 374 | Options.FloatABIType = llvm::FloatABI::Default; |
| 375 | } |
| 376 | |
Lang Hames | c968671 | 2012-07-06 00:59:19 +0000 | [diff] [blame] | 377 | // Set FP fusion mode. |
| 378 | switch (LangOpts.getFPContractMode()) { |
| 379 | case LangOptions::FPC_Off: |
| 380 | Options.AllowFPOpFusion = llvm::FPOpFusion::Strict; |
| 381 | break; |
| 382 | case LangOptions::FPC_On: |
| 383 | Options.AllowFPOpFusion = llvm::FPOpFusion::Standard; |
| 384 | break; |
| 385 | case LangOptions::FPC_Fast: |
| 386 | Options.AllowFPOpFusion = llvm::FPOpFusion::Fast; |
Nadav Rotem | 25030c4 | 2012-10-19 04:15:32 +0000 | [diff] [blame] | 387 | break; |
Lang Hames | c968671 | 2012-07-06 00:59:19 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 390 | Options.LessPreciseFPMADOption = CodeGenOpts.LessPreciseFPMAD; |
| 391 | Options.NoInfsFPMath = CodeGenOpts.NoInfsFPMath; |
| 392 | Options.NoNaNsFPMath = CodeGenOpts.NoNaNsFPMath; |
| 393 | Options.NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS; |
| 394 | Options.UnsafeFPMath = CodeGenOpts.UnsafeFPMath; |
| 395 | Options.UseSoftFloat = CodeGenOpts.SoftFloat; |
Nick Lewycky | 4e785c9 | 2011-12-06 03:33:03 +0000 | [diff] [blame] | 396 | Options.StackAlignmentOverride = CodeGenOpts.StackAlignment; |
| 397 | Options.RealignStack = CodeGenOpts.StackRealignment; |
Nick Lewycky | 1db772b | 2012-01-23 08:29:12 +0000 | [diff] [blame] | 398 | Options.DisableTailCalls = CodeGenOpts.DisableTailCalls; |
Bob Wilson | 71fd6cc | 2012-02-03 06:27:22 +0000 | [diff] [blame] | 399 | Options.TrapFuncName = CodeGenOpts.TrapFuncName; |
Chandler Carruth | 5081de5 | 2012-04-08 21:09:51 +0000 | [diff] [blame] | 400 | Options.PositionIndependentExecutable = LangOpts.PIELevel != 0; |
Chad Rosier | a7afeb0 | 2012-08-21 16:16:06 +0000 | [diff] [blame] | 401 | Options.SSPBufferSize = CodeGenOpts.SSPBufferSize; |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 402 | |
Evan Cheng | 368691e | 2011-06-30 02:06:32 +0000 | [diff] [blame] | 403 | TargetMachine *TM = TheTarget->createTargetMachine(Triple, TargetOpts.CPU, |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 404 | FeaturesStr, Options, |
| 405 | RM, CM, OptLevel); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 406 | |
| 407 | if (CodeGenOpts.RelaxAll) |
| 408 | TM->setMCRelaxAll(true); |
Daniel Dunbar | 9693232 | 2011-03-28 22:49:28 +0000 | [diff] [blame] | 409 | if (CodeGenOpts.SaveTempLabels) |
| 410 | TM->setMCSaveTempLabels(true); |
Rafael Espindola | f24a151 | 2011-04-30 18:35:43 +0000 | [diff] [blame] | 411 | if (CodeGenOpts.NoDwarf2CFIAsm) |
| 412 | TM->setMCUseCFI(false); |
Nick Lewycky | aaf2f36 | 2011-10-31 01:06:42 +0000 | [diff] [blame] | 413 | if (!CodeGenOpts.NoDwarfDirectoryAsm) |
| 414 | TM->setMCUseDwarfDirectory(true); |
Nick Lewycky | c3b9014 | 2011-06-21 00:14:18 +0000 | [diff] [blame] | 415 | if (CodeGenOpts.NoExecStack) |
| 416 | TM->setMCNoExecStack(true); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 417 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 418 | return TM; |
| 419 | } |
| 420 | |
| 421 | bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action, |
| 422 | formatted_raw_ostream &OS, |
| 423 | TargetMachine *TM) { |
| 424 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 425 | // Create the code generator passes. |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 426 | PassManager *PM = getCodeGenPasses(TM); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 427 | |
Chad Rosier | 3f3335d | 2012-02-29 20:14:59 +0000 | [diff] [blame] | 428 | // Add LibraryInfo. |
Daniel Dunbar | cbbe2c0 | 2012-10-19 20:10:10 +0000 | [diff] [blame] | 429 | llvm::Triple TargetTriple(TheModule->getTargetTriple()); |
| 430 | TargetLibraryInfo *TLI = new TargetLibraryInfo(TargetTriple); |
Chad Rosier | 3f3335d | 2012-02-29 20:14:59 +0000 | [diff] [blame] | 431 | if (!CodeGenOpts.SimplifyLibCalls) |
| 432 | TLI->disableAllFunctions(); |
| 433 | PM->add(TLI); |
| 434 | |
Nadav Rotem | 25030c4 | 2012-10-19 04:15:32 +0000 | [diff] [blame] | 435 | // Add TargetTransformInfo. |
| 436 | PM->add(new TargetTransformInfo(TM->getScalarTargetTransformInfo(), |
| 437 | TM->getVectorTargetTransformInfo())); |
| 438 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 439 | // Normal mode, emit a .s or .o file by running the code generator. Note, |
| 440 | // this also adds codegenerator level optimization passes. |
| 441 | TargetMachine::CodeGenFileType CGFT = TargetMachine::CGFT_AssemblyFile; |
| 442 | if (Action == Backend_EmitObj) |
| 443 | CGFT = TargetMachine::CGFT_ObjectFile; |
| 444 | else if (Action == Backend_EmitMCNull) |
| 445 | CGFT = TargetMachine::CGFT_Null; |
| 446 | else |
| 447 | assert(Action == Backend_EmitAssembly && "Invalid action!"); |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 448 | |
| 449 | // Add ObjC ARC final-cleanup optimizations. This is done as part of the |
| 450 | // "codegen" passes so that it isn't run multiple times when there is |
| 451 | // inlining happening. |
Dan Gohman | 465a899 | 2012-04-04 21:04:56 +0000 | [diff] [blame] | 452 | if (LangOpts.ObjCAutoRefCount && |
| 453 | CodeGenOpts.OptimizationLevel > 0) |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 454 | PM->add(createObjCARCContractPass()); |
| 455 | |
Evan Cheng | 9254bf7 | 2011-11-16 08:38:55 +0000 | [diff] [blame] | 456 | if (TM->addPassesToEmitFile(*PM, OS, CGFT, |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 457 | /*DisableVerify=*/!CodeGenOpts.VerifyModule)) { |
| 458 | Diags.Report(diag::err_fe_unable_to_interface_with_target); |
| 459 | return false; |
| 460 | } |
| 461 | |
| 462 | return true; |
| 463 | } |
| 464 | |
| 465 | void EmitAssemblyHelper::EmitAssembly(BackendAction Action, raw_ostream *OS) { |
| 466 | TimeRegion Region(llvm::TimePassesIsEnabled ? &CodeGenerationTime : 0); |
| 467 | llvm::formatted_raw_ostream FormattedOS; |
| 468 | |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 469 | TargetMachine *TM = CreateTargetMachine(); |
| 470 | CreatePasses(TM); |
| 471 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 472 | switch (Action) { |
| 473 | case Backend_EmitNothing: |
| 474 | break; |
| 475 | |
| 476 | case Backend_EmitBC: |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 477 | getPerModulePasses(TM)->add(createBitcodeWriterPass(*OS)); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 478 | break; |
| 479 | |
| 480 | case Backend_EmitLL: |
| 481 | FormattedOS.setStream(*OS, formatted_raw_ostream::PRESERVE_STREAM); |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 482 | getPerModulePasses(TM)->add(createPrintModulePass(&FormattedOS)); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 483 | break; |
| 484 | |
| 485 | default: |
| 486 | FormattedOS.setStream(*OS, formatted_raw_ostream::PRESERVE_STREAM); |
Nadav Rotem | fa60be0 | 2012-10-24 00:53:38 +0000 | [diff] [blame] | 487 | if (!AddEmitPasses(Action, FormattedOS, TM)) |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 488 | return; |
| 489 | } |
| 490 | |
Andrew Trick | 92b5d94 | 2011-04-05 18:56:55 +0000 | [diff] [blame] | 491 | // Before executing passes, print the final values of the LLVM options. |
| 492 | cl::PrintOptionValues(); |
| 493 | |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 494 | // Run passes. For now we do all passes at once, but eventually we |
| 495 | // would like to have the option of streaming code generation. |
| 496 | |
| 497 | if (PerFunctionPasses) { |
| 498 | PrettyStackTraceString CrashInfo("Per-function optimization"); |
| 499 | |
| 500 | PerFunctionPasses->doInitialization(); |
| 501 | for (Module::iterator I = TheModule->begin(), |
| 502 | E = TheModule->end(); I != E; ++I) |
| 503 | if (!I->isDeclaration()) |
| 504 | PerFunctionPasses->run(*I); |
| 505 | PerFunctionPasses->doFinalization(); |
| 506 | } |
| 507 | |
| 508 | if (PerModulePasses) { |
| 509 | PrettyStackTraceString CrashInfo("Per-module optimization passes"); |
| 510 | PerModulePasses->run(*TheModule); |
| 511 | } |
| 512 | |
| 513 | if (CodeGenPasses) { |
| 514 | PrettyStackTraceString CrashInfo("Code generation"); |
Daniel Dunbar | db2f237 | 2010-09-17 07:35:16 +0000 | [diff] [blame] | 515 | CodeGenPasses->run(*TheModule); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 516 | } |
| 517 | } |
| 518 | |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 519 | void clang::EmitBackendOutput(DiagnosticsEngine &Diags, |
| 520 | const CodeGenOptions &CGOpts, |
Nick Lewycky | 3aaeccc | 2011-12-02 22:17:00 +0000 | [diff] [blame] | 521 | const clang::TargetOptions &TOpts, |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 522 | const LangOptions &LOpts, |
| 523 | Module *M, |
Daniel Dunbar | 05a7f3d | 2010-06-07 23:21:04 +0000 | [diff] [blame] | 524 | BackendAction Action, raw_ostream *OS) { |
Dan Gohman | b18b8ad | 2011-07-05 22:02:36 +0000 | [diff] [blame] | 525 | EmitAssemblyHelper AsmHelper(Diags, CGOpts, TOpts, LOpts, M); |
Daniel Dunbar | 897c676 | 2010-06-07 23:20:08 +0000 | [diff] [blame] | 526 | |
| 527 | AsmHelper.EmitAssembly(Action, OS); |
| 528 | } |