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<std::string>
118 TargetTriple("mtriple", cl::desc("Override target triple for module"));
119
120 static cl::opt<bool>
121 UnitAtATime("funit-at-a-time",
122 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
123 cl::init(true));
124
125 static cl::opt<bool>
126 DisableSimplifyLibCalls("disable-simplify-libcalls",
127 cl::desc("Disable simplify-libcalls"));
128
129 static cl::opt<bool>
130 Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
131
132 static cl::alias
133 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
134
135 static cl::opt<bool>
136 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
137
138 static cl::opt<bool>
139 PrintBreakpoints("print-breakpoints-for-testing",
140 cl::desc("Print select breakpoints location for testing"));
141
142 static cl::opt<std::string>
143 DefaultDataLayout("default-data-layout",
144 cl::desc("data layout string to use if not specified by module"),
145 cl::value_desc("layout-string"), cl::init(""));
146
147 // ---------- Define Printers for module and function passes ------------
148 namespace {
149
150 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
151 static char ID;
152 const PassInfo *PassToPrint;
153 raw_ostream &Out;
154 std::string PassName;
155
CallGraphSCCPassPrinter__anon7574d4250111::CallGraphSCCPassPrinter156 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
157 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
158 std::string PassToPrintName = PassToPrint->getPassName();
159 PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
160 }
161
runOnSCC__anon7574d4250111::CallGraphSCCPassPrinter162 virtual bool runOnSCC(CallGraphSCC &SCC) {
163 if (!Quiet)
164 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
165
166 // Get and print pass...
167 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
168 Function *F = (*I)->getFunction();
169 if (F)
170 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
171 F->getParent());
172 }
173 return false;
174 }
175
getPassName__anon7574d4250111::CallGraphSCCPassPrinter176 virtual const char *getPassName() const { return PassName.c_str(); }
177
getAnalysisUsage__anon7574d4250111::CallGraphSCCPassPrinter178 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
179 AU.addRequiredID(PassToPrint->getTypeInfo());
180 AU.setPreservesAll();
181 }
182 };
183
184 char CallGraphSCCPassPrinter::ID = 0;
185
186 struct ModulePassPrinter : public ModulePass {
187 static char ID;
188 const PassInfo *PassToPrint;
189 raw_ostream &Out;
190 std::string PassName;
191
ModulePassPrinter__anon7574d4250111::ModulePassPrinter192 ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
193 : ModulePass(ID), PassToPrint(PI), Out(out) {
194 std::string PassToPrintName = PassToPrint->getPassName();
195 PassName = "ModulePass Printer: " + PassToPrintName;
196 }
197
runOnModule__anon7574d4250111::ModulePassPrinter198 virtual bool runOnModule(Module &M) {
199 if (!Quiet)
200 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
201
202 // Get and print pass...
203 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
204 return false;
205 }
206
getPassName__anon7574d4250111::ModulePassPrinter207 virtual const char *getPassName() const { return PassName.c_str(); }
208
getAnalysisUsage__anon7574d4250111::ModulePassPrinter209 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
210 AU.addRequiredID(PassToPrint->getTypeInfo());
211 AU.setPreservesAll();
212 }
213 };
214
215 char ModulePassPrinter::ID = 0;
216 struct FunctionPassPrinter : public FunctionPass {
217 const PassInfo *PassToPrint;
218 raw_ostream &Out;
219 static char ID;
220 std::string PassName;
221
FunctionPassPrinter__anon7574d4250111::FunctionPassPrinter222 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
223 : FunctionPass(ID), PassToPrint(PI), Out(out) {
224 std::string PassToPrintName = PassToPrint->getPassName();
225 PassName = "FunctionPass Printer: " + PassToPrintName;
226 }
227
runOnFunction__anon7574d4250111::FunctionPassPrinter228 virtual bool runOnFunction(Function &F) {
229 if (!Quiet)
230 Out << "Printing analysis '" << PassToPrint->getPassName()
231 << "' for function '" << F.getName() << "':\n";
232
233 // Get and print pass...
234 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
235 F.getParent());
236 return false;
237 }
238
getPassName__anon7574d4250111::FunctionPassPrinter239 virtual const char *getPassName() const { return PassName.c_str(); }
240
getAnalysisUsage__anon7574d4250111::FunctionPassPrinter241 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
242 AU.addRequiredID(PassToPrint->getTypeInfo());
243 AU.setPreservesAll();
244 }
245 };
246
247 char FunctionPassPrinter::ID = 0;
248
249 struct LoopPassPrinter : public LoopPass {
250 static char ID;
251 const PassInfo *PassToPrint;
252 raw_ostream &Out;
253 std::string PassName;
254
LoopPassPrinter__anon7574d4250111::LoopPassPrinter255 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
256 LoopPass(ID), PassToPrint(PI), Out(out) {
257 std::string PassToPrintName = PassToPrint->getPassName();
258 PassName = "LoopPass Printer: " + PassToPrintName;
259 }
260
261
runOnLoop__anon7574d4250111::LoopPassPrinter262 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
263 if (!Quiet)
264 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
265
266 // Get and print pass...
267 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
268 L->getHeader()->getParent()->getParent());
269 return false;
270 }
271
getPassName__anon7574d4250111::LoopPassPrinter272 virtual const char *getPassName() const { return PassName.c_str(); }
273
getAnalysisUsage__anon7574d4250111::LoopPassPrinter274 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
275 AU.addRequiredID(PassToPrint->getTypeInfo());
276 AU.setPreservesAll();
277 }
278 };
279
280 char LoopPassPrinter::ID = 0;
281
282 struct RegionPassPrinter : public RegionPass {
283 static char ID;
284 const PassInfo *PassToPrint;
285 raw_ostream &Out;
286 std::string PassName;
287
RegionPassPrinter__anon7574d4250111::RegionPassPrinter288 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
289 PassToPrint(PI), Out(out) {
290 std::string PassToPrintName = PassToPrint->getPassName();
291 PassName = "RegionPass Printer: " + PassToPrintName;
292 }
293
runOnRegion__anon7574d4250111::RegionPassPrinter294 virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
295 if (!Quiet) {
296 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
297 << "region: '" << R->getNameStr() << "' in function '"
298 << R->getEntry()->getParent()->getName() << "':\n";
299 }
300 // Get and print pass...
301 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
302 R->getEntry()->getParent()->getParent());
303 return false;
304 }
305
getPassName__anon7574d4250111::RegionPassPrinter306 virtual const char *getPassName() const { return PassName.c_str(); }
307
getAnalysisUsage__anon7574d4250111::RegionPassPrinter308 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
309 AU.addRequiredID(PassToPrint->getTypeInfo());
310 AU.setPreservesAll();
311 }
312 };
313
314 char RegionPassPrinter::ID = 0;
315
316 struct BasicBlockPassPrinter : public BasicBlockPass {
317 const PassInfo *PassToPrint;
318 raw_ostream &Out;
319 static char ID;
320 std::string PassName;
321
BasicBlockPassPrinter__anon7574d4250111::BasicBlockPassPrinter322 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
323 : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
324 std::string PassToPrintName = PassToPrint->getPassName();
325 PassName = "BasicBlockPass Printer: " + PassToPrintName;
326 }
327
runOnBasicBlock__anon7574d4250111::BasicBlockPassPrinter328 virtual bool runOnBasicBlock(BasicBlock &BB) {
329 if (!Quiet)
330 Out << "Printing Analysis info for BasicBlock '" << BB.getName()
331 << "': Pass " << PassToPrint->getPassName() << ":\n";
332
333 // Get and print pass...
334 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
335 BB.getParent()->getParent());
336 return false;
337 }
338
getPassName__anon7574d4250111::BasicBlockPassPrinter339 virtual const char *getPassName() const { return PassName.c_str(); }
340
getAnalysisUsage__anon7574d4250111::BasicBlockPassPrinter341 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
342 AU.addRequiredID(PassToPrint->getTypeInfo());
343 AU.setPreservesAll();
344 }
345 };
346
347 char BasicBlockPassPrinter::ID = 0;
348
349 struct BreakpointPrinter : public ModulePass {
350 raw_ostream &Out;
351 static char ID;
352
BreakpointPrinter__anon7574d4250111::BreakpointPrinter353 BreakpointPrinter(raw_ostream &out)
354 : ModulePass(ID), Out(out) {
355 }
356
getContextName__anon7574d4250111::BreakpointPrinter357 void getContextName(DIDescriptor Context, std::string &N) {
358 if (Context.isNameSpace()) {
359 DINameSpace NS(Context);
360 if (!NS.getName().empty()) {
361 getContextName(NS.getContext(), N);
362 N = N + NS.getName().str() + "::";
363 }
364 } else if (Context.isType()) {
365 DIType TY(Context);
366 if (!TY.getName().empty()) {
367 getContextName(TY.getContext(), N);
368 N = N + TY.getName().str() + "::";
369 }
370 }
371 }
372
runOnModule__anon7574d4250111::BreakpointPrinter373 virtual bool runOnModule(Module &M) {
374 StringSet<> Processed;
375 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
376 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
377 std::string Name;
378 DISubprogram SP(NMD->getOperand(i));
379 if (SP.Verify())
380 getContextName(SP.getContext(), Name);
381 Name = Name + SP.getDisplayName().str();
382 if (!Name.empty() && Processed.insert(Name)) {
383 Out << Name << "\n";
384 }
385 }
386 return false;
387 }
388
getAnalysisUsage__anon7574d4250111::BreakpointPrinter389 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
390 AU.setPreservesAll();
391 }
392 };
393
394 } // anonymous namespace
395
396 char BreakpointPrinter::ID = 0;
397
addPass(PassManagerBase & PM,Pass * P)398 static inline void addPass(PassManagerBase &PM, Pass *P) {
399 // Add the pass to the pass manager...
400 PM.add(P);
401
402 // If we are verifying all of the intermediate steps, add the verifier...
403 if (VerifyEach) PM.add(createVerifierPass());
404 }
405
406 /// AddOptimizationPasses - This routine adds optimization passes
407 /// based on selected optimization level, OptLevel. This routine
408 /// duplicates llvm-gcc behaviour.
409 ///
410 /// OptLevel - Optimization Level
AddOptimizationPasses(PassManagerBase & MPM,FunctionPassManager & FPM,unsigned OptLevel)411 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
412 unsigned OptLevel) {
413 FPM.add(createVerifierPass()); // Verify that input is correct
414
415 PassManagerBuilder Builder;
416 Builder.OptLevel = OptLevel;
417
418 if (DisableInline) {
419 // No inlining pass
420 } else if (OptLevel > 1) {
421 unsigned Threshold = 225;
422 if (OptLevel > 2)
423 Threshold = 275;
424 Builder.Inliner = createFunctionInliningPass(Threshold);
425 } else {
426 Builder.Inliner = createAlwaysInlinerPass();
427 }
428 Builder.DisableUnitAtATime = !UnitAtATime;
429 Builder.DisableUnrollLoops = OptLevel == 0;
430 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
431
432 Builder.populateFunctionPassManager(FPM);
433 Builder.populateModulePassManager(MPM);
434 }
435
AddStandardCompilePasses(PassManagerBase & PM)436 static void AddStandardCompilePasses(PassManagerBase &PM) {
437 PM.add(createVerifierPass()); // Verify that input is correct
438
439 // If the -strip-debug command line option was specified, do it.
440 if (StripDebug)
441 addPass(PM, createStripSymbolsPass(true));
442
443 if (DisableOptimizations) return;
444
445 // -std-compile-opts adds the same module passes as -O3.
446 PassManagerBuilder Builder;
447 if (!DisableInline)
448 Builder.Inliner = createFunctionInliningPass();
449 Builder.OptLevel = 3;
450 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
451 Builder.populateModulePassManager(PM);
452 }
453
AddStandardLinkPasses(PassManagerBase & PM)454 static void AddStandardLinkPasses(PassManagerBase &PM) {
455 PM.add(createVerifierPass()); // Verify that input is correct
456
457 // If the -strip-debug command line option was specified, do it.
458 if (StripDebug)
459 addPass(PM, createStripSymbolsPass(true));
460
461 if (DisableOptimizations) return;
462
463 PassManagerBuilder Builder;
464 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
465 /*RunInliner=*/ !DisableInline);
466 }
467
468
469 //===----------------------------------------------------------------------===//
470 // main for opt
471 //
main(int argc,char ** argv)472 int main(int argc, char **argv) {
473 sys::PrintStackTraceOnErrorSignal();
474 llvm::PrettyStackTraceProgram X(argc, argv);
475
476 // Enable debug stream buffering.
477 EnableDebugBuffering = true;
478
479 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
480 LLVMContext &Context = getGlobalContext();
481
482 // Initialize passes
483 PassRegistry &Registry = *PassRegistry::getPassRegistry();
484 initializeCore(Registry);
485 initializeScalarOpts(Registry);
486 initializeVectorization(Registry);
487 initializeIPO(Registry);
488 initializeAnalysis(Registry);
489 initializeIPA(Registry);
490 initializeTransformUtils(Registry);
491 initializeInstCombine(Registry);
492 initializeInstrumentation(Registry);
493 initializeTarget(Registry);
494
495 cl::ParseCommandLineOptions(argc, argv,
496 "llvm .bc -> .bc modular optimizer and analysis printer\n");
497
498 if (AnalyzeOnly && NoOutput) {
499 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
500 return 1;
501 }
502
503 // Allocate a full target machine description only if necessary.
504 // FIXME: The choice of target should be controllable on the command line.
505 std::auto_ptr<TargetMachine> target;
506
507 SMDiagnostic Err;
508
509 // Load the input module...
510 std::auto_ptr<Module> M;
511 M.reset(ParseIRFile(InputFilename, Err, Context));
512
513 if (M.get() == 0) {
514 Err.print(argv[0], errs());
515 return 1;
516 }
517
518 // If we are supposed to override the target triple, do so now.
519 if (!TargetTriple.empty())
520 M->setTargetTriple(Triple::normalize(TargetTriple));
521
522 // Figure out what stream we are supposed to write to...
523 OwningPtr<tool_output_file> Out;
524 if (NoOutput) {
525 if (!OutputFilename.empty())
526 errs() << "WARNING: The -o (output filename) option is ignored when\n"
527 "the --disable-output option is used.\n";
528 } else {
529 // Default to standard output.
530 if (OutputFilename.empty())
531 OutputFilename = "-";
532
533 std::string ErrorInfo;
534 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
535 raw_fd_ostream::F_Binary));
536 if (!ErrorInfo.empty()) {
537 errs() << ErrorInfo << '\n';
538 return 1;
539 }
540 }
541
542 // If the output is set to be emitted to standard out, and standard out is a
543 // console, print out a warning message and refuse to do it. We don't
544 // impress anyone by spewing tons of binary goo to a terminal.
545 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
546 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
547 NoOutput = true;
548
549 // Create a PassManager to hold and optimize the collection of passes we are
550 // about to build.
551 //
552 PassManager Passes;
553
554 // Add an appropriate TargetLibraryInfo pass for the module's triple.
555 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
556
557 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
558 if (DisableSimplifyLibCalls)
559 TLI->disableAllFunctions();
560 Passes.add(TLI);
561
562 // Add an appropriate TargetData instance for this module.
563 TargetData *TD = 0;
564 const std::string &ModuleDataLayout = M.get()->getDataLayout();
565 if (!ModuleDataLayout.empty())
566 TD = new TargetData(ModuleDataLayout);
567 else if (!DefaultDataLayout.empty())
568 TD = new TargetData(DefaultDataLayout);
569
570 if (TD)
571 Passes.add(TD);
572
573 OwningPtr<FunctionPassManager> FPasses;
574 if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
575 FPasses.reset(new FunctionPassManager(M.get()));
576 if (TD)
577 FPasses->add(new TargetData(*TD));
578 }
579
580 if (PrintBreakpoints) {
581 // Default to standard output.
582 if (!Out) {
583 if (OutputFilename.empty())
584 OutputFilename = "-";
585
586 std::string ErrorInfo;
587 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
588 raw_fd_ostream::F_Binary));
589 if (!ErrorInfo.empty()) {
590 errs() << ErrorInfo << '\n';
591 return 1;
592 }
593 }
594 Passes.add(new BreakpointPrinter(Out->os()));
595 NoOutput = true;
596 }
597
598 // If the -strip-debug command line option was specified, add it. If
599 // -std-compile-opts was also specified, it will handle StripDebug.
600 if (StripDebug && !StandardCompileOpts)
601 addPass(Passes, createStripSymbolsPass(true));
602
603 // Create a new optimization pass for each one specified on the command line
604 for (unsigned i = 0; i < PassList.size(); ++i) {
605 // Check to see if -std-compile-opts was specified before this option. If
606 // so, handle it.
607 if (StandardCompileOpts &&
608 StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
609 AddStandardCompilePasses(Passes);
610 StandardCompileOpts = false;
611 }
612
613 if (StandardLinkOpts &&
614 StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
615 AddStandardLinkPasses(Passes);
616 StandardLinkOpts = false;
617 }
618
619 if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
620 AddOptimizationPasses(Passes, *FPasses, 1);
621 OptLevelO1 = false;
622 }
623
624 if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
625 AddOptimizationPasses(Passes, *FPasses, 2);
626 OptLevelO2 = false;
627 }
628
629 if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
630 AddOptimizationPasses(Passes, *FPasses, 3);
631 OptLevelO3 = false;
632 }
633
634 const PassInfo *PassInf = PassList[i];
635 Pass *P = 0;
636 if (PassInf->getNormalCtor())
637 P = PassInf->getNormalCtor()();
638 else
639 errs() << argv[0] << ": cannot create pass: "
640 << PassInf->getPassName() << "\n";
641 if (P) {
642 PassKind Kind = P->getPassKind();
643 addPass(Passes, P);
644
645 if (AnalyzeOnly) {
646 switch (Kind) {
647 case PT_BasicBlock:
648 Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
649 break;
650 case PT_Region:
651 Passes.add(new RegionPassPrinter(PassInf, Out->os()));
652 break;
653 case PT_Loop:
654 Passes.add(new LoopPassPrinter(PassInf, Out->os()));
655 break;
656 case PT_Function:
657 Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
658 break;
659 case PT_CallGraphSCC:
660 Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
661 break;
662 default:
663 Passes.add(new ModulePassPrinter(PassInf, Out->os()));
664 break;
665 }
666 }
667 }
668
669 if (PrintEachXForm)
670 Passes.add(createPrintModulePass(&errs()));
671 }
672
673 // If -std-compile-opts was specified at the end of the pass list, add them.
674 if (StandardCompileOpts) {
675 AddStandardCompilePasses(Passes);
676 StandardCompileOpts = false;
677 }
678
679 if (StandardLinkOpts) {
680 AddStandardLinkPasses(Passes);
681 StandardLinkOpts = false;
682 }
683
684 if (OptLevelO1)
685 AddOptimizationPasses(Passes, *FPasses, 1);
686
687 if (OptLevelO2)
688 AddOptimizationPasses(Passes, *FPasses, 2);
689
690 if (OptLevelO3)
691 AddOptimizationPasses(Passes, *FPasses, 3);
692
693 if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
694 FPasses->doInitialization();
695 for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
696 FPasses->run(*F);
697 FPasses->doFinalization();
698 }
699
700 // Check that the module is well formed on completion of optimization
701 if (!NoVerify && !VerifyEach)
702 Passes.add(createVerifierPass());
703
704 // Write bitcode or assembly to the output as the last step...
705 if (!NoOutput && !AnalyzeOnly) {
706 if (OutputAssembly)
707 Passes.add(createPrintModulePass(&Out->os()));
708 else
709 Passes.add(createBitcodeWriterPass(Out->os()));
710 }
711
712 // Before executing passes, print the final values of the LLVM options.
713 cl::PrintOptionValues();
714
715 // Now that we have all of the passes ready, run them.
716 Passes.run(*M.get());
717
718 // Declare success.
719 if (!NoOutput || PrintBreakpoints)
720 Out->keep();
721
722 return 0;
723 }
724