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/Module.h"
17 #include "llvm/PassManager.h"
18 #include "llvm/CallGraphSCCPass.h"
19 #include "llvm/Bitcode/ReaderWriter.h"
20 #include "llvm/Assembly/PrintModulePass.h"
21 #include "llvm/Analysis/DebugInfo.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 llvm-gcc -O1"));
108
109 static cl::opt<bool>
110 OptLevelO2("O2",
111 cl::desc("Optimization level 2. Similar to llvm-gcc -O2"));
112
113 static cl::opt<bool>
114 OptLevelO3("O3",
115 cl::desc("Optimization level 3. Similar to llvm-gcc -O3"));
116
117 static cl::opt<bool>
118 UnitAtATime("funit-at-a-time",
119 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
120 cl::init(true));
121
122 static cl::opt<bool>
123 DisableSimplifyLibCalls("disable-simplify-libcalls",
124 cl::desc("Disable simplify-libcalls"));
125
126 static cl::opt<bool>
127 Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
128
129 static cl::alias
130 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
131
132 static cl::opt<bool>
133 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
134
135 static cl::opt<bool>
136 PrintBreakpoints("print-breakpoints-for-testing",
137 cl::desc("Print select breakpoints location for testing"));
138
139 static cl::opt<std::string>
140 DefaultDataLayout("default-data-layout",
141 cl::desc("data layout string to use if not specified by module"),
142 cl::value_desc("layout-string"), cl::init(""));
143
144 // ---------- Define Printers for module and function passes ------------
145 namespace {
146
147 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
148 static char ID;
149 const PassInfo *PassToPrint;
150 raw_ostream &Out;
151 std::string PassName;
152
CallGraphSCCPassPrinter__anona0255cf60111::CallGraphSCCPassPrinter153 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
154 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
155 std::string PassToPrintName = PassToPrint->getPassName();
156 PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
157 }
158
runOnSCC__anona0255cf60111::CallGraphSCCPassPrinter159 virtual bool runOnSCC(CallGraphSCC &SCC) {
160 if (!Quiet)
161 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
162
163 // Get and print pass...
164 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
165 Function *F = (*I)->getFunction();
166 if (F)
167 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
168 F->getParent());
169 }
170 return false;
171 }
172
getPassName__anona0255cf60111::CallGraphSCCPassPrinter173 virtual const char *getPassName() const { return PassName.c_str(); }
174
getAnalysisUsage__anona0255cf60111::CallGraphSCCPassPrinter175 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
176 AU.addRequiredID(PassToPrint->getTypeInfo());
177 AU.setPreservesAll();
178 }
179 };
180
181 char CallGraphSCCPassPrinter::ID = 0;
182
183 struct ModulePassPrinter : public ModulePass {
184 static char ID;
185 const PassInfo *PassToPrint;
186 raw_ostream &Out;
187 std::string PassName;
188
ModulePassPrinter__anona0255cf60111::ModulePassPrinter189 ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
190 : ModulePass(ID), PassToPrint(PI), Out(out) {
191 std::string PassToPrintName = PassToPrint->getPassName();
192 PassName = "ModulePass Printer: " + PassToPrintName;
193 }
194
runOnModule__anona0255cf60111::ModulePassPrinter195 virtual bool runOnModule(Module &M) {
196 if (!Quiet)
197 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
198
199 // Get and print pass...
200 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
201 return false;
202 }
203
getPassName__anona0255cf60111::ModulePassPrinter204 virtual const char *getPassName() const { return PassName.c_str(); }
205
getAnalysisUsage__anona0255cf60111::ModulePassPrinter206 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
207 AU.addRequiredID(PassToPrint->getTypeInfo());
208 AU.setPreservesAll();
209 }
210 };
211
212 char ModulePassPrinter::ID = 0;
213 struct FunctionPassPrinter : public FunctionPass {
214 const PassInfo *PassToPrint;
215 raw_ostream &Out;
216 static char ID;
217 std::string PassName;
218
FunctionPassPrinter__anona0255cf60111::FunctionPassPrinter219 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
220 : FunctionPass(ID), PassToPrint(PI), Out(out) {
221 std::string PassToPrintName = PassToPrint->getPassName();
222 PassName = "FunctionPass Printer: " + PassToPrintName;
223 }
224
runOnFunction__anona0255cf60111::FunctionPassPrinter225 virtual bool runOnFunction(Function &F) {
226 if (!Quiet)
227 Out << "Printing analysis '" << PassToPrint->getPassName()
228 << "' for function '" << F.getName() << "':\n";
229
230 // Get and print pass...
231 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
232 F.getParent());
233 return false;
234 }
235
getPassName__anona0255cf60111::FunctionPassPrinter236 virtual const char *getPassName() const { return PassName.c_str(); }
237
getAnalysisUsage__anona0255cf60111::FunctionPassPrinter238 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
239 AU.addRequiredID(PassToPrint->getTypeInfo());
240 AU.setPreservesAll();
241 }
242 };
243
244 char FunctionPassPrinter::ID = 0;
245
246 struct LoopPassPrinter : public LoopPass {
247 static char ID;
248 const PassInfo *PassToPrint;
249 raw_ostream &Out;
250 std::string PassName;
251
LoopPassPrinter__anona0255cf60111::LoopPassPrinter252 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
253 LoopPass(ID), PassToPrint(PI), Out(out) {
254 std::string PassToPrintName = PassToPrint->getPassName();
255 PassName = "LoopPass Printer: " + PassToPrintName;
256 }
257
258
runOnLoop__anona0255cf60111::LoopPassPrinter259 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
260 if (!Quiet)
261 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
262
263 // Get and print pass...
264 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
265 L->getHeader()->getParent()->getParent());
266 return false;
267 }
268
getPassName__anona0255cf60111::LoopPassPrinter269 virtual const char *getPassName() const { return PassName.c_str(); }
270
getAnalysisUsage__anona0255cf60111::LoopPassPrinter271 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
272 AU.addRequiredID(PassToPrint->getTypeInfo());
273 AU.setPreservesAll();
274 }
275 };
276
277 char LoopPassPrinter::ID = 0;
278
279 struct RegionPassPrinter : public RegionPass {
280 static char ID;
281 const PassInfo *PassToPrint;
282 raw_ostream &Out;
283 std::string PassName;
284
RegionPassPrinter__anona0255cf60111::RegionPassPrinter285 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
286 PassToPrint(PI), Out(out) {
287 std::string PassToPrintName = PassToPrint->getPassName();
288 PassName = "RegionPass Printer: " + PassToPrintName;
289 }
290
runOnRegion__anona0255cf60111::RegionPassPrinter291 virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
292 if (!Quiet) {
293 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
294 << "region: '" << R->getNameStr() << "' in function '"
295 << R->getEntry()->getParent()->getNameStr() << "':\n";
296 }
297 // Get and print pass...
298 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
299 R->getEntry()->getParent()->getParent());
300 return false;
301 }
302
getPassName__anona0255cf60111::RegionPassPrinter303 virtual const char *getPassName() const { return PassName.c_str(); }
304
getAnalysisUsage__anona0255cf60111::RegionPassPrinter305 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
306 AU.addRequiredID(PassToPrint->getTypeInfo());
307 AU.setPreservesAll();
308 }
309 };
310
311 char RegionPassPrinter::ID = 0;
312
313 struct BasicBlockPassPrinter : public BasicBlockPass {
314 const PassInfo *PassToPrint;
315 raw_ostream &Out;
316 static char ID;
317 std::string PassName;
318
BasicBlockPassPrinter__anona0255cf60111::BasicBlockPassPrinter319 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
320 : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
321 std::string PassToPrintName = PassToPrint->getPassName();
322 PassName = "BasicBlockPass Printer: " + PassToPrintName;
323 }
324
runOnBasicBlock__anona0255cf60111::BasicBlockPassPrinter325 virtual bool runOnBasicBlock(BasicBlock &BB) {
326 if (!Quiet)
327 Out << "Printing Analysis info for BasicBlock '" << BB.getName()
328 << "': Pass " << PassToPrint->getPassName() << ":\n";
329
330 // Get and print pass...
331 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
332 BB.getParent()->getParent());
333 return false;
334 }
335
getPassName__anona0255cf60111::BasicBlockPassPrinter336 virtual const char *getPassName() const { return PassName.c_str(); }
337
getAnalysisUsage__anona0255cf60111::BasicBlockPassPrinter338 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
339 AU.addRequiredID(PassToPrint->getTypeInfo());
340 AU.setPreservesAll();
341 }
342 };
343
344 char BasicBlockPassPrinter::ID = 0;
345
346 struct BreakpointPrinter : public ModulePass {
347 raw_ostream &Out;
348 static char ID;
349
BreakpointPrinter__anona0255cf60111::BreakpointPrinter350 BreakpointPrinter(raw_ostream &out)
351 : ModulePass(ID), Out(out) {
352 }
353
getContextName__anona0255cf60111::BreakpointPrinter354 void getContextName(DIDescriptor Context, std::string &N) {
355 if (Context.isNameSpace()) {
356 DINameSpace NS(Context);
357 if (!NS.getName().empty()) {
358 getContextName(NS.getContext(), N);
359 N = N + NS.getName().str() + "::";
360 }
361 } else if (Context.isType()) {
362 DIType TY(Context);
363 if (!TY.getName().empty()) {
364 getContextName(TY.getContext(), N);
365 N = N + TY.getName().str() + "::";
366 }
367 }
368 }
369
runOnModule__anona0255cf60111::BreakpointPrinter370 virtual bool runOnModule(Module &M) {
371 StringSet<> Processed;
372 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
373 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
374 std::string Name;
375 DISubprogram SP(NMD->getOperand(i));
376 if (SP.Verify())
377 getContextName(SP.getContext(), Name);
378 Name = Name + SP.getDisplayName().str();
379 if (!Name.empty() && Processed.insert(Name)) {
380 Out << Name << "\n";
381 }
382 }
383 return false;
384 }
385
getAnalysisUsage__anona0255cf60111::BreakpointPrinter386 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
387 AU.setPreservesAll();
388 }
389 };
390
391 } // anonymous namespace
392
393 char BreakpointPrinter::ID = 0;
394
addPass(PassManagerBase & PM,Pass * P)395 static inline void addPass(PassManagerBase &PM, Pass *P) {
396 // Add the pass to the pass manager...
397 PM.add(P);
398
399 // If we are verifying all of the intermediate steps, add the verifier...
400 if (VerifyEach) PM.add(createVerifierPass());
401 }
402
403 /// AddOptimizationPasses - This routine adds optimization passes
404 /// based on selected optimization level, OptLevel. This routine
405 /// duplicates llvm-gcc behaviour.
406 ///
407 /// OptLevel - Optimization Level
AddOptimizationPasses(PassManagerBase & MPM,FunctionPassManager & FPM,unsigned OptLevel)408 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
409 unsigned OptLevel) {
410 PassManagerBuilder Builder;
411 Builder.OptLevel = OptLevel;
412
413 if (DisableInline) {
414 // No inlining pass
415 } else if (OptLevel > 1) {
416 unsigned Threshold = 225;
417 if (OptLevel > 2)
418 Threshold = 275;
419 Builder.Inliner = createFunctionInliningPass(Threshold);
420 } else {
421 Builder.Inliner = createAlwaysInlinerPass();
422 }
423 Builder.DisableUnitAtATime = !UnitAtATime;
424 Builder.DisableUnrollLoops = OptLevel == 0;
425 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
426
427 Builder.populateFunctionPassManager(FPM);
428 Builder.populateModulePassManager(MPM);
429 }
430
AddStandardCompilePasses(PassManagerBase & PM)431 static void AddStandardCompilePasses(PassManagerBase &PM) {
432 PM.add(createVerifierPass()); // Verify that input is correct
433
434 // If the -strip-debug command line option was specified, do it.
435 if (StripDebug)
436 addPass(PM, createStripSymbolsPass(true));
437
438 if (DisableOptimizations) return;
439
440 // -std-compile-opts adds the same module passes as -O3.
441 PassManagerBuilder Builder;
442 if (!DisableInline)
443 Builder.Inliner = createFunctionInliningPass();
444 Builder.OptLevel = 3;
445 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
446 Builder.populateModulePassManager(PM);
447 }
448
AddStandardLinkPasses(PassManagerBase & PM)449 static void AddStandardLinkPasses(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 PassManagerBuilder Builder;
459 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
460 /*RunInliner=*/ !DisableInline);
461 }
462
463
464 //===----------------------------------------------------------------------===//
465 // main for opt
466 //
main(int argc,char ** argv)467 int main(int argc, char **argv) {
468 sys::PrintStackTraceOnErrorSignal();
469 llvm::PrettyStackTraceProgram X(argc, argv);
470
471 // Enable debug stream buffering.
472 EnableDebugBuffering = true;
473
474 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
475 LLVMContext &Context = getGlobalContext();
476
477 // Initialize passes
478 PassRegistry &Registry = *PassRegistry::getPassRegistry();
479 initializeCore(Registry);
480 initializeScalarOpts(Registry);
481 initializeIPO(Registry);
482 initializeAnalysis(Registry);
483 initializeIPA(Registry);
484 initializeTransformUtils(Registry);
485 initializeInstCombine(Registry);
486 initializeInstrumentation(Registry);
487 initializeTarget(Registry);
488
489 cl::ParseCommandLineOptions(argc, argv,
490 "llvm .bc -> .bc modular optimizer and analysis printer\n");
491
492 if (AnalyzeOnly && NoOutput) {
493 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
494 return 1;
495 }
496
497 // Allocate a full target machine description only if necessary.
498 // FIXME: The choice of target should be controllable on the command line.
499 std::auto_ptr<TargetMachine> target;
500
501 SMDiagnostic Err;
502
503 // Load the input module...
504 std::auto_ptr<Module> M;
505 M.reset(ParseIRFile(InputFilename, Err, Context));
506
507 if (M.get() == 0) {
508 Err.Print(argv[0], errs());
509 return 1;
510 }
511
512 // Figure out what stream we are supposed to write to...
513 OwningPtr<tool_output_file> Out;
514 if (NoOutput) {
515 if (!OutputFilename.empty())
516 errs() << "WARNING: The -o (output filename) option is ignored when\n"
517 "the --disable-output option is used.\n";
518 } else {
519 // Default to standard output.
520 if (OutputFilename.empty())
521 OutputFilename = "-";
522
523 std::string ErrorInfo;
524 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
525 raw_fd_ostream::F_Binary));
526 if (!ErrorInfo.empty()) {
527 errs() << ErrorInfo << '\n';
528 return 1;
529 }
530 }
531
532 // If the output is set to be emitted to standard out, and standard out is a
533 // console, print out a warning message and refuse to do it. We don't
534 // impress anyone by spewing tons of binary goo to a terminal.
535 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
536 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
537 NoOutput = true;
538
539 // Create a PassManager to hold and optimize the collection of passes we are
540 // about to build.
541 //
542 PassManager Passes;
543
544 // Add an appropriate TargetLibraryInfo pass for the module's triple.
545 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
546
547 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
548 if (DisableSimplifyLibCalls)
549 TLI->disableAllFunctions();
550 Passes.add(TLI);
551
552 // Add an appropriate TargetData instance for this module.
553 TargetData *TD = 0;
554 const std::string &ModuleDataLayout = M.get()->getDataLayout();
555 if (!ModuleDataLayout.empty())
556 TD = new TargetData(ModuleDataLayout);
557 else if (!DefaultDataLayout.empty())
558 TD = new TargetData(DefaultDataLayout);
559
560 if (TD)
561 Passes.add(TD);
562
563 OwningPtr<FunctionPassManager> FPasses;
564 if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
565 FPasses.reset(new FunctionPassManager(M.get()));
566 if (TD)
567 FPasses->add(new TargetData(*TD));
568 }
569
570 if (PrintBreakpoints) {
571 // Default to standard output.
572 if (!Out) {
573 if (OutputFilename.empty())
574 OutputFilename = "-";
575
576 std::string ErrorInfo;
577 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
578 raw_fd_ostream::F_Binary));
579 if (!ErrorInfo.empty()) {
580 errs() << ErrorInfo << '\n';
581 return 1;
582 }
583 }
584 Passes.add(new BreakpointPrinter(Out->os()));
585 NoOutput = true;
586 }
587
588 // If the -strip-debug command line option was specified, add it. If
589 // -std-compile-opts was also specified, it will handle StripDebug.
590 if (StripDebug && !StandardCompileOpts)
591 addPass(Passes, createStripSymbolsPass(true));
592
593 // Create a new optimization pass for each one specified on the command line
594 for (unsigned i = 0; i < PassList.size(); ++i) {
595 // Check to see if -std-compile-opts was specified before this option. If
596 // so, handle it.
597 if (StandardCompileOpts &&
598 StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
599 AddStandardCompilePasses(Passes);
600 StandardCompileOpts = false;
601 }
602
603 if (StandardLinkOpts &&
604 StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
605 AddStandardLinkPasses(Passes);
606 StandardLinkOpts = false;
607 }
608
609 if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
610 AddOptimizationPasses(Passes, *FPasses, 1);
611 OptLevelO1 = false;
612 }
613
614 if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
615 AddOptimizationPasses(Passes, *FPasses, 2);
616 OptLevelO2 = false;
617 }
618
619 if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
620 AddOptimizationPasses(Passes, *FPasses, 3);
621 OptLevelO3 = false;
622 }
623
624 const PassInfo *PassInf = PassList[i];
625 Pass *P = 0;
626 if (PassInf->getNormalCtor())
627 P = PassInf->getNormalCtor()();
628 else
629 errs() << argv[0] << ": cannot create pass: "
630 << PassInf->getPassName() << "\n";
631 if (P) {
632 PassKind Kind = P->getPassKind();
633 addPass(Passes, P);
634
635 if (AnalyzeOnly) {
636 switch (Kind) {
637 case PT_BasicBlock:
638 Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
639 break;
640 case PT_Region:
641 Passes.add(new RegionPassPrinter(PassInf, Out->os()));
642 break;
643 case PT_Loop:
644 Passes.add(new LoopPassPrinter(PassInf, Out->os()));
645 break;
646 case PT_Function:
647 Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
648 break;
649 case PT_CallGraphSCC:
650 Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
651 break;
652 default:
653 Passes.add(new ModulePassPrinter(PassInf, Out->os()));
654 break;
655 }
656 }
657 }
658
659 if (PrintEachXForm)
660 Passes.add(createPrintModulePass(&errs()));
661 }
662
663 // If -std-compile-opts was specified at the end of the pass list, add them.
664 if (StandardCompileOpts) {
665 AddStandardCompilePasses(Passes);
666 StandardCompileOpts = false;
667 }
668
669 if (StandardLinkOpts) {
670 AddStandardLinkPasses(Passes);
671 StandardLinkOpts = false;
672 }
673
674 if (OptLevelO1)
675 AddOptimizationPasses(Passes, *FPasses, 1);
676
677 if (OptLevelO2)
678 AddOptimizationPasses(Passes, *FPasses, 2);
679
680 if (OptLevelO3)
681 AddOptimizationPasses(Passes, *FPasses, 3);
682
683 if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
684 FPasses->doInitialization();
685 for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
686 FPasses->run(*F);
687 FPasses->doFinalization();
688 }
689
690 // Check that the module is well formed on completion of optimization
691 if (!NoVerify && !VerifyEach)
692 Passes.add(createVerifierPass());
693
694 // Write bitcode or assembly to the output as the last step...
695 if (!NoOutput && !AnalyzeOnly) {
696 if (OutputAssembly)
697 Passes.add(createPrintModulePass(&Out->os()));
698 else
699 Passes.add(createBitcodeWriterPass(Out->os()));
700 }
701
702 // Before executing passes, print the final values of the LLVM options.
703 cl::PrintOptionValues();
704
705 // Now that we have all of the passes ready, run them.
706 Passes.run(*M.get());
707
708 // Declare success.
709 if (!NoOutput || PrintBreakpoints)
710 Out->keep();
711
712 return 0;
713 }
714