1 //===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
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 // Optimizations may be specified an arbitrary number of times on the command
11 // line, They are run in the order specified.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "llvm/LLVMContext.h"
16 #include "llvm/DebugInfo.h"
17 #include "llvm/Module.h"
18 #include "llvm/PassManager.h"
19 #include "llvm/CallGraphSCCPass.h"
20 #include "llvm/Bitcode/ReaderWriter.h"
21 #include "llvm/Assembly/PrintModulePass.h"
22 #include "llvm/Analysis/Verifier.h"
23 #include "llvm/Analysis/LoopPass.h"
24 #include "llvm/Analysis/RegionPass.h"
25 #include "llvm/Analysis/CallGraph.h"
26 #include "llvm/Target/TargetData.h"
27 #include "llvm/Target/TargetLibraryInfo.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/ADT/StringSet.h"
30 #include "llvm/ADT/Triple.h"
31 #include "llvm/Support/PassNameParser.h"
32 #include "llvm/Support/Signals.h"
33 #include "llvm/Support/Debug.h"
34 #include "llvm/Support/IRReader.h"
35 #include "llvm/Support/ManagedStatic.h"
36 #include "llvm/Support/PluginLoader.h"
37 #include "llvm/Support/PrettyStackTrace.h"
38 #include "llvm/Support/SystemUtils.h"
39 #include "llvm/Support/ToolOutputFile.h"
40 #include "llvm/LinkAllPasses.h"
41 #include "llvm/LinkAllVMCore.h"
42 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
43 #include <memory>
44 #include <algorithm>
45 using namespace llvm;
46
47 // The OptimizationList is automatically populated with registered Passes by the
48 // PassNameParser.
49 //
50 static cl::list<const PassInfo*, bool, PassNameParser>
51 PassList(cl::desc("Optimizations available:"));
52
53 // Other command line options...
54 //
55 static cl::opt<std::string>
56 InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
57 cl::init("-"), cl::value_desc("filename"));
58
59 static cl::opt<std::string>
60 OutputFilename("o", cl::desc("Override output filename"),
61 cl::value_desc("filename"));
62
63 static cl::opt<bool>
64 Force("f", cl::desc("Enable binary output on terminals"));
65
66 static cl::opt<bool>
67 PrintEachXForm("p", cl::desc("Print module after each transformation"));
68
69 static cl::opt<bool>
70 NoOutput("disable-output",
71 cl::desc("Do not write result bitcode file"), cl::Hidden);
72
73 static cl::opt<bool>
74 OutputAssembly("S", cl::desc("Write output as LLVM assembly"));
75
76 static cl::opt<bool>
77 NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
78
79 static cl::opt<bool>
80 VerifyEach("verify-each", cl::desc("Verify after each transform"));
81
82 static cl::opt<bool>
83 StripDebug("strip-debug",
84 cl::desc("Strip debugger symbol info from translation unit"));
85
86 static cl::opt<bool>
87 DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
88
89 static cl::opt<bool>
90 DisableOptimizations("disable-opt",
91 cl::desc("Do not run any optimization passes"));
92
93 static cl::opt<bool>
94 DisableInternalize("disable-internalize",
95 cl::desc("Do not mark all symbols as internal"));
96
97 static cl::opt<bool>
98 StandardCompileOpts("std-compile-opts",
99 cl::desc("Include the standard compile time optimizations"));
100
101 static cl::opt<bool>
102 StandardLinkOpts("std-link-opts",
103 cl::desc("Include the standard link time optimizations"));
104
105 static cl::opt<bool>
106 OptLevelO1("O1",
107 cl::desc("Optimization level 1. Similar to clang -O1"));
108
109 static cl::opt<bool>
110 OptLevelO2("O2",
111 cl::desc("Optimization level 2. Similar to clang -O2"));
112
113 static cl::opt<bool>
114 OptLevelOs("Os",
115 cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
116
117 static cl::opt<bool>
118 OptLevelOz("Oz",
119 cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
120
121 static cl::opt<bool>
122 OptLevelO3("O3",
123 cl::desc("Optimization level 3. Similar to clang -O3"));
124
125 static cl::opt<std::string>
126 TargetTriple("mtriple", cl::desc("Override target triple for module"));
127
128 static cl::opt<bool>
129 UnitAtATime("funit-at-a-time",
130 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
131 cl::init(true));
132
133 static cl::opt<bool>
134 DisableSimplifyLibCalls("disable-simplify-libcalls",
135 cl::desc("Disable simplify-libcalls"));
136
137 static cl::opt<bool>
138 Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
139
140 static cl::alias
141 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
142
143 static cl::opt<bool>
144 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
145
146 static cl::opt<bool>
147 PrintBreakpoints("print-breakpoints-for-testing",
148 cl::desc("Print select breakpoints location for testing"));
149
150 static cl::opt<std::string>
151 DefaultDataLayout("default-data-layout",
152 cl::desc("data layout string to use if not specified by module"),
153 cl::value_desc("layout-string"), cl::init(""));
154
155 // ---------- Define Printers for module and function passes ------------
156 namespace {
157
158 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
159 static char ID;
160 const PassInfo *PassToPrint;
161 raw_ostream &Out;
162 std::string PassName;
163
CallGraphSCCPassPrinter__anon1bce11270111::CallGraphSCCPassPrinter164 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
165 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
166 std::string PassToPrintName = PassToPrint->getPassName();
167 PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
168 }
169
runOnSCC__anon1bce11270111::CallGraphSCCPassPrinter170 virtual bool runOnSCC(CallGraphSCC &SCC) {
171 if (!Quiet)
172 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
173
174 // Get and print pass...
175 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
176 Function *F = (*I)->getFunction();
177 if (F)
178 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
179 F->getParent());
180 }
181 return false;
182 }
183
getPassName__anon1bce11270111::CallGraphSCCPassPrinter184 virtual const char *getPassName() const { return PassName.c_str(); }
185
getAnalysisUsage__anon1bce11270111::CallGraphSCCPassPrinter186 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
187 AU.addRequiredID(PassToPrint->getTypeInfo());
188 AU.setPreservesAll();
189 }
190 };
191
192 char CallGraphSCCPassPrinter::ID = 0;
193
194 struct ModulePassPrinter : public ModulePass {
195 static char ID;
196 const PassInfo *PassToPrint;
197 raw_ostream &Out;
198 std::string PassName;
199
ModulePassPrinter__anon1bce11270111::ModulePassPrinter200 ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
201 : ModulePass(ID), PassToPrint(PI), Out(out) {
202 std::string PassToPrintName = PassToPrint->getPassName();
203 PassName = "ModulePass Printer: " + PassToPrintName;
204 }
205
runOnModule__anon1bce11270111::ModulePassPrinter206 virtual bool runOnModule(Module &M) {
207 if (!Quiet)
208 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
209
210 // Get and print pass...
211 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
212 return false;
213 }
214
getPassName__anon1bce11270111::ModulePassPrinter215 virtual const char *getPassName() const { return PassName.c_str(); }
216
getAnalysisUsage__anon1bce11270111::ModulePassPrinter217 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
218 AU.addRequiredID(PassToPrint->getTypeInfo());
219 AU.setPreservesAll();
220 }
221 };
222
223 char ModulePassPrinter::ID = 0;
224 struct FunctionPassPrinter : public FunctionPass {
225 const PassInfo *PassToPrint;
226 raw_ostream &Out;
227 static char ID;
228 std::string PassName;
229
FunctionPassPrinter__anon1bce11270111::FunctionPassPrinter230 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
231 : FunctionPass(ID), PassToPrint(PI), Out(out) {
232 std::string PassToPrintName = PassToPrint->getPassName();
233 PassName = "FunctionPass Printer: " + PassToPrintName;
234 }
235
runOnFunction__anon1bce11270111::FunctionPassPrinter236 virtual bool runOnFunction(Function &F) {
237 if (!Quiet)
238 Out << "Printing analysis '" << PassToPrint->getPassName()
239 << "' for function '" << F.getName() << "':\n";
240
241 // Get and print pass...
242 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
243 F.getParent());
244 return false;
245 }
246
getPassName__anon1bce11270111::FunctionPassPrinter247 virtual const char *getPassName() const { return PassName.c_str(); }
248
getAnalysisUsage__anon1bce11270111::FunctionPassPrinter249 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
250 AU.addRequiredID(PassToPrint->getTypeInfo());
251 AU.setPreservesAll();
252 }
253 };
254
255 char FunctionPassPrinter::ID = 0;
256
257 struct LoopPassPrinter : public LoopPass {
258 static char ID;
259 const PassInfo *PassToPrint;
260 raw_ostream &Out;
261 std::string PassName;
262
LoopPassPrinter__anon1bce11270111::LoopPassPrinter263 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
264 LoopPass(ID), PassToPrint(PI), Out(out) {
265 std::string PassToPrintName = PassToPrint->getPassName();
266 PassName = "LoopPass Printer: " + PassToPrintName;
267 }
268
269
runOnLoop__anon1bce11270111::LoopPassPrinter270 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
271 if (!Quiet)
272 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
273
274 // Get and print pass...
275 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
276 L->getHeader()->getParent()->getParent());
277 return false;
278 }
279
getPassName__anon1bce11270111::LoopPassPrinter280 virtual const char *getPassName() const { return PassName.c_str(); }
281
getAnalysisUsage__anon1bce11270111::LoopPassPrinter282 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
283 AU.addRequiredID(PassToPrint->getTypeInfo());
284 AU.setPreservesAll();
285 }
286 };
287
288 char LoopPassPrinter::ID = 0;
289
290 struct RegionPassPrinter : public RegionPass {
291 static char ID;
292 const PassInfo *PassToPrint;
293 raw_ostream &Out;
294 std::string PassName;
295
RegionPassPrinter__anon1bce11270111::RegionPassPrinter296 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
297 PassToPrint(PI), Out(out) {
298 std::string PassToPrintName = PassToPrint->getPassName();
299 PassName = "RegionPass Printer: " + PassToPrintName;
300 }
301
runOnRegion__anon1bce11270111::RegionPassPrinter302 virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
303 if (!Quiet) {
304 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
305 << "region: '" << R->getNameStr() << "' in function '"
306 << R->getEntry()->getParent()->getName() << "':\n";
307 }
308 // Get and print pass...
309 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
310 R->getEntry()->getParent()->getParent());
311 return false;
312 }
313
getPassName__anon1bce11270111::RegionPassPrinter314 virtual const char *getPassName() const { return PassName.c_str(); }
315
getAnalysisUsage__anon1bce11270111::RegionPassPrinter316 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
317 AU.addRequiredID(PassToPrint->getTypeInfo());
318 AU.setPreservesAll();
319 }
320 };
321
322 char RegionPassPrinter::ID = 0;
323
324 struct BasicBlockPassPrinter : public BasicBlockPass {
325 const PassInfo *PassToPrint;
326 raw_ostream &Out;
327 static char ID;
328 std::string PassName;
329
BasicBlockPassPrinter__anon1bce11270111::BasicBlockPassPrinter330 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
331 : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
332 std::string PassToPrintName = PassToPrint->getPassName();
333 PassName = "BasicBlockPass Printer: " + PassToPrintName;
334 }
335
runOnBasicBlock__anon1bce11270111::BasicBlockPassPrinter336 virtual bool runOnBasicBlock(BasicBlock &BB) {
337 if (!Quiet)
338 Out << "Printing Analysis info for BasicBlock '" << BB.getName()
339 << "': Pass " << PassToPrint->getPassName() << ":\n";
340
341 // Get and print pass...
342 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
343 BB.getParent()->getParent());
344 return false;
345 }
346
getPassName__anon1bce11270111::BasicBlockPassPrinter347 virtual const char *getPassName() const { return PassName.c_str(); }
348
getAnalysisUsage__anon1bce11270111::BasicBlockPassPrinter349 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
350 AU.addRequiredID(PassToPrint->getTypeInfo());
351 AU.setPreservesAll();
352 }
353 };
354
355 char BasicBlockPassPrinter::ID = 0;
356
357 struct BreakpointPrinter : public ModulePass {
358 raw_ostream &Out;
359 static char ID;
360
BreakpointPrinter__anon1bce11270111::BreakpointPrinter361 BreakpointPrinter(raw_ostream &out)
362 : ModulePass(ID), Out(out) {
363 }
364
getContextName__anon1bce11270111::BreakpointPrinter365 void getContextName(DIDescriptor Context, std::string &N) {
366 if (Context.isNameSpace()) {
367 DINameSpace NS(Context);
368 if (!NS.getName().empty()) {
369 getContextName(NS.getContext(), N);
370 N = N + NS.getName().str() + "::";
371 }
372 } else if (Context.isType()) {
373 DIType TY(Context);
374 if (!TY.getName().empty()) {
375 getContextName(TY.getContext(), N);
376 N = N + TY.getName().str() + "::";
377 }
378 }
379 }
380
runOnModule__anon1bce11270111::BreakpointPrinter381 virtual bool runOnModule(Module &M) {
382 StringSet<> Processed;
383 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
384 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
385 std::string Name;
386 DISubprogram SP(NMD->getOperand(i));
387 if (SP.Verify())
388 getContextName(SP.getContext(), Name);
389 Name = Name + SP.getDisplayName().str();
390 if (!Name.empty() && Processed.insert(Name)) {
391 Out << Name << "\n";
392 }
393 }
394 return false;
395 }
396
getAnalysisUsage__anon1bce11270111::BreakpointPrinter397 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
398 AU.setPreservesAll();
399 }
400 };
401
402 } // anonymous namespace
403
404 char BreakpointPrinter::ID = 0;
405
addPass(PassManagerBase & PM,Pass * P)406 static inline void addPass(PassManagerBase &PM, Pass *P) {
407 // Add the pass to the pass manager...
408 PM.add(P);
409
410 // If we are verifying all of the intermediate steps, add the verifier...
411 if (VerifyEach) PM.add(createVerifierPass());
412 }
413
414 /// AddOptimizationPasses - This routine adds optimization passes
415 /// based on selected optimization level, OptLevel. This routine
416 /// duplicates llvm-gcc behaviour.
417 ///
418 /// OptLevel - Optimization Level
AddOptimizationPasses(PassManagerBase & MPM,FunctionPassManager & FPM,unsigned OptLevel,unsigned SizeLevel)419 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
420 unsigned OptLevel, unsigned SizeLevel) {
421 FPM.add(createVerifierPass()); // Verify that input is correct
422
423 PassManagerBuilder Builder;
424 Builder.OptLevel = OptLevel;
425 Builder.SizeLevel = SizeLevel;
426
427 if (DisableInline) {
428 // No inlining pass
429 } else if (OptLevel > 1) {
430 unsigned Threshold = 225;
431 if (SizeLevel == 1) // -Os
432 Threshold = 75;
433 else if (SizeLevel == 2) // -Oz
434 Threshold = 25;
435 if (OptLevel > 2)
436 Threshold = 275;
437 Builder.Inliner = createFunctionInliningPass(Threshold);
438 } else {
439 Builder.Inliner = createAlwaysInlinerPass();
440 }
441 Builder.DisableUnitAtATime = !UnitAtATime;
442 Builder.DisableUnrollLoops = OptLevel == 0;
443 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
444
445 Builder.populateFunctionPassManager(FPM);
446 Builder.populateModulePassManager(MPM);
447 }
448
AddStandardCompilePasses(PassManagerBase & PM)449 static void AddStandardCompilePasses(PassManagerBase &PM) {
450 PM.add(createVerifierPass()); // Verify that input is correct
451
452 // If the -strip-debug command line option was specified, do it.
453 if (StripDebug)
454 addPass(PM, createStripSymbolsPass(true));
455
456 if (DisableOptimizations) return;
457
458 // -std-compile-opts adds the same module passes as -O3.
459 PassManagerBuilder Builder;
460 if (!DisableInline)
461 Builder.Inliner = createFunctionInliningPass();
462 Builder.OptLevel = 3;
463 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
464 Builder.populateModulePassManager(PM);
465 }
466
AddStandardLinkPasses(PassManagerBase & PM)467 static void AddStandardLinkPasses(PassManagerBase &PM) {
468 PM.add(createVerifierPass()); // Verify that input is correct
469
470 // If the -strip-debug command line option was specified, do it.
471 if (StripDebug)
472 addPass(PM, createStripSymbolsPass(true));
473
474 if (DisableOptimizations) return;
475
476 PassManagerBuilder Builder;
477 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
478 /*RunInliner=*/ !DisableInline);
479 }
480
481
482 //===----------------------------------------------------------------------===//
483 // main for opt
484 //
main(int argc,char ** argv)485 int main(int argc, char **argv) {
486 sys::PrintStackTraceOnErrorSignal();
487 llvm::PrettyStackTraceProgram X(argc, argv);
488
489 // Enable debug stream buffering.
490 EnableDebugBuffering = true;
491
492 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
493 LLVMContext &Context = getGlobalContext();
494
495 // Initialize passes
496 PassRegistry &Registry = *PassRegistry::getPassRegistry();
497 initializeCore(Registry);
498 initializeScalarOpts(Registry);
499 initializeVectorization(Registry);
500 initializeIPO(Registry);
501 initializeAnalysis(Registry);
502 initializeIPA(Registry);
503 initializeTransformUtils(Registry);
504 initializeInstCombine(Registry);
505 initializeInstrumentation(Registry);
506 initializeTarget(Registry);
507
508 cl::ParseCommandLineOptions(argc, argv,
509 "llvm .bc -> .bc modular optimizer and analysis printer\n");
510
511 if (AnalyzeOnly && NoOutput) {
512 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
513 return 1;
514 }
515
516 SMDiagnostic Err;
517
518 // Load the input module...
519 std::auto_ptr<Module> M;
520 M.reset(ParseIRFile(InputFilename, Err, Context));
521
522 if (M.get() == 0) {
523 Err.print(argv[0], errs());
524 return 1;
525 }
526
527 // If we are supposed to override the target triple, do so now.
528 if (!TargetTriple.empty())
529 M->setTargetTriple(Triple::normalize(TargetTriple));
530
531 // Figure out what stream we are supposed to write to...
532 OwningPtr<tool_output_file> Out;
533 if (NoOutput) {
534 if (!OutputFilename.empty())
535 errs() << "WARNING: The -o (output filename) option is ignored when\n"
536 "the --disable-output option is used.\n";
537 } else {
538 // Default to standard output.
539 if (OutputFilename.empty())
540 OutputFilename = "-";
541
542 std::string ErrorInfo;
543 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
544 raw_fd_ostream::F_Binary));
545 if (!ErrorInfo.empty()) {
546 errs() << ErrorInfo << '\n';
547 return 1;
548 }
549 }
550
551 // If the output is set to be emitted to standard out, and standard out is a
552 // console, print out a warning message and refuse to do it. We don't
553 // impress anyone by spewing tons of binary goo to a terminal.
554 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
555 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
556 NoOutput = true;
557
558 // Create a PassManager to hold and optimize the collection of passes we are
559 // about to build.
560 //
561 PassManager Passes;
562
563 // Add an appropriate TargetLibraryInfo pass for the module's triple.
564 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
565
566 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
567 if (DisableSimplifyLibCalls)
568 TLI->disableAllFunctions();
569 Passes.add(TLI);
570
571 // Add an appropriate TargetData instance for this module.
572 TargetData *TD = 0;
573 const std::string &ModuleDataLayout = M.get()->getDataLayout();
574 if (!ModuleDataLayout.empty())
575 TD = new TargetData(ModuleDataLayout);
576 else if (!DefaultDataLayout.empty())
577 TD = new TargetData(DefaultDataLayout);
578
579 if (TD)
580 Passes.add(TD);
581
582 OwningPtr<FunctionPassManager> FPasses;
583 if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
584 FPasses.reset(new FunctionPassManager(M.get()));
585 if (TD)
586 FPasses->add(new TargetData(*TD));
587 }
588
589 if (PrintBreakpoints) {
590 // Default to standard output.
591 if (!Out) {
592 if (OutputFilename.empty())
593 OutputFilename = "-";
594
595 std::string ErrorInfo;
596 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
597 raw_fd_ostream::F_Binary));
598 if (!ErrorInfo.empty()) {
599 errs() << ErrorInfo << '\n';
600 return 1;
601 }
602 }
603 Passes.add(new BreakpointPrinter(Out->os()));
604 NoOutput = true;
605 }
606
607 // If the -strip-debug command line option was specified, add it. If
608 // -std-compile-opts was also specified, it will handle StripDebug.
609 if (StripDebug && !StandardCompileOpts)
610 addPass(Passes, createStripSymbolsPass(true));
611
612 // Create a new optimization pass for each one specified on the command line
613 for (unsigned i = 0; i < PassList.size(); ++i) {
614 // Check to see if -std-compile-opts was specified before this option. If
615 // so, handle it.
616 if (StandardCompileOpts &&
617 StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
618 AddStandardCompilePasses(Passes);
619 StandardCompileOpts = false;
620 }
621
622 if (StandardLinkOpts &&
623 StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
624 AddStandardLinkPasses(Passes);
625 StandardLinkOpts = false;
626 }
627
628 if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
629 AddOptimizationPasses(Passes, *FPasses, 1, 0);
630 OptLevelO1 = false;
631 }
632
633 if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
634 AddOptimizationPasses(Passes, *FPasses, 2, 0);
635 OptLevelO2 = false;
636 }
637
638 if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
639 AddOptimizationPasses(Passes, *FPasses, 2, 1);
640 OptLevelOs = false;
641 }
642
643 if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
644 AddOptimizationPasses(Passes, *FPasses, 2, 2);
645 OptLevelOz = false;
646 }
647
648 if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
649 AddOptimizationPasses(Passes, *FPasses, 3, 0);
650 OptLevelO3 = false;
651 }
652
653 const PassInfo *PassInf = PassList[i];
654 Pass *P = 0;
655 if (PassInf->getNormalCtor())
656 P = PassInf->getNormalCtor()();
657 else
658 errs() << argv[0] << ": cannot create pass: "
659 << PassInf->getPassName() << "\n";
660 if (P) {
661 PassKind Kind = P->getPassKind();
662 addPass(Passes, P);
663
664 if (AnalyzeOnly) {
665 switch (Kind) {
666 case PT_BasicBlock:
667 Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
668 break;
669 case PT_Region:
670 Passes.add(new RegionPassPrinter(PassInf, Out->os()));
671 break;
672 case PT_Loop:
673 Passes.add(new LoopPassPrinter(PassInf, Out->os()));
674 break;
675 case PT_Function:
676 Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
677 break;
678 case PT_CallGraphSCC:
679 Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
680 break;
681 default:
682 Passes.add(new ModulePassPrinter(PassInf, Out->os()));
683 break;
684 }
685 }
686 }
687
688 if (PrintEachXForm)
689 Passes.add(createPrintModulePass(&errs()));
690 }
691
692 // If -std-compile-opts was specified at the end of the pass list, add them.
693 if (StandardCompileOpts) {
694 AddStandardCompilePasses(Passes);
695 StandardCompileOpts = false;
696 }
697
698 if (StandardLinkOpts) {
699 AddStandardLinkPasses(Passes);
700 StandardLinkOpts = false;
701 }
702
703 if (OptLevelO1)
704 AddOptimizationPasses(Passes, *FPasses, 1, 0);
705
706 if (OptLevelO2)
707 AddOptimizationPasses(Passes, *FPasses, 2, 0);
708
709 if (OptLevelOs)
710 AddOptimizationPasses(Passes, *FPasses, 2, 1);
711
712 if (OptLevelOz)
713 AddOptimizationPasses(Passes, *FPasses, 2, 2);
714
715 if (OptLevelO3)
716 AddOptimizationPasses(Passes, *FPasses, 3, 0);
717
718 if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
719 FPasses->doInitialization();
720 for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
721 FPasses->run(*F);
722 FPasses->doFinalization();
723 }
724
725 // Check that the module is well formed on completion of optimization
726 if (!NoVerify && !VerifyEach)
727 Passes.add(createVerifierPass());
728
729 // Write bitcode or assembly to the output as the last step...
730 if (!NoOutput && !AnalyzeOnly) {
731 if (OutputAssembly)
732 Passes.add(createPrintModulePass(&Out->os()));
733 else
734 Passes.add(createBitcodeWriterPass(Out->os()));
735 }
736
737 // Before executing passes, print the final values of the LLVM options.
738 cl::PrintOptionValues();
739
740 // Now that we have all of the passes ready, run them.
741 Passes.run(*M.get());
742
743 // Declare success.
744 if (!NoOutput || PrintBreakpoints)
745 Out->keep();
746
747 return 0;
748 }
749