Bug Summary

File:build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/tools/llc/llc.cpp
Warning:line 670, column 13
Potential leak of memory pointed to by 'MMIWP'

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name llc.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/llc -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/tools/llc -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/tools/llc/llc.cpp
1//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This is the llc code generator driver. It provides a convenient
10// command-line interface for generating native assembly-language code
11// or C code, given LLVM bitcode.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/ADT/STLExtras.h"
16#include "llvm/ADT/ScopeExit.h"
17#include "llvm/ADT/Triple.h"
18#include "llvm/Analysis/TargetLibraryInfo.h"
19#include "llvm/CodeGen/CommandFlags.h"
20#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
21#include "llvm/CodeGen/LinkAllCodegenComponents.h"
22#include "llvm/CodeGen/MIRParser/MIRParser.h"
23#include "llvm/CodeGen/MachineFunctionPass.h"
24#include "llvm/CodeGen/MachineModuleInfo.h"
25#include "llvm/CodeGen/TargetPassConfig.h"
26#include "llvm/CodeGen/TargetSubtargetInfo.h"
27#include "llvm/IR/AutoUpgrade.h"
28#include "llvm/IR/DataLayout.h"
29#include "llvm/IR/DiagnosticInfo.h"
30#include "llvm/IR/DiagnosticPrinter.h"
31#include "llvm/IR/IRPrintingPasses.h"
32#include "llvm/IR/LLVMContext.h"
33#include "llvm/IR/LLVMRemarkStreamer.h"
34#include "llvm/IR/LegacyPassManager.h"
35#include "llvm/IR/Module.h"
36#include "llvm/IR/Verifier.h"
37#include "llvm/IRReader/IRReader.h"
38#include "llvm/InitializePasses.h"
39#include "llvm/MC/MCTargetOptionsCommandFlags.h"
40#include "llvm/MC/SubtargetFeature.h"
41#include "llvm/MC/TargetRegistry.h"
42#include "llvm/Pass.h"
43#include "llvm/Remarks/HotnessThresholdParser.h"
44#include "llvm/Support/CommandLine.h"
45#include "llvm/Support/Debug.h"
46#include "llvm/Support/FileSystem.h"
47#include "llvm/Support/FormattedStream.h"
48#include "llvm/Support/Host.h"
49#include "llvm/Support/InitLLVM.h"
50#include "llvm/Support/ManagedStatic.h"
51#include "llvm/Support/PluginLoader.h"
52#include "llvm/Support/SourceMgr.h"
53#include "llvm/Support/TargetSelect.h"
54#include "llvm/Support/TimeProfiler.h"
55#include "llvm/Support/ToolOutputFile.h"
56#include "llvm/Support/WithColor.h"
57#include "llvm/Target/TargetLoweringObjectFile.h"
58#include "llvm/Target/TargetMachine.h"
59#include "llvm/Transforms/Utils/Cloning.h"
60#include <memory>
61using namespace llvm;
62
63static codegen::RegisterCodeGenFlags CGF;
64
65// General options for llc. Other pass-specific options are specified
66// within the corresponding llc passes, and target-specific options
67// and back-end code generation options are specified with the target machine.
68//
69static cl::opt<std::string>
70InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
71
72static cl::opt<std::string>
73InputLanguage("x", cl::desc("Input language ('ir' or 'mir')"));
74
75static cl::opt<std::string>
76OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
77
78static cl::opt<std::string>
79 SplitDwarfOutputFile("split-dwarf-output",
80 cl::desc(".dwo output filename"),
81 cl::value_desc("filename"));
82
83static cl::opt<unsigned>
84TimeCompilations("time-compilations", cl::Hidden, cl::init(1u),
85 cl::value_desc("N"),
86 cl::desc("Repeat compilation N times for timing"));
87
88static cl::opt<bool> TimeTrace("time-trace", cl::desc("Record time trace"));
89
90static cl::opt<unsigned> TimeTraceGranularity(
91 "time-trace-granularity",
92 cl::desc(
93 "Minimum time granularity (in microseconds) traced by time profiler"),
94 cl::init(500), cl::Hidden);
95
96static cl::opt<std::string>
97 TimeTraceFile("time-trace-file",
98 cl::desc("Specify time trace file destination"),
99 cl::value_desc("filename"));
100
101static cl::opt<std::string>
102 BinutilsVersion("binutils-version", cl::Hidden,
103 cl::desc("Produced object files can use all ELF features "
104 "supported by this binutils version and newer."
105 "If -no-integrated-as is specified, the generated "
106 "assembly will consider GNU as support."
107 "'none' means that all ELF features can be used, "
108 "regardless of binutils support"));
109
110static cl::opt<bool>
111NoIntegratedAssembler("no-integrated-as", cl::Hidden,
112 cl::desc("Disable integrated assembler"));
113
114static cl::opt<bool>
115 PreserveComments("preserve-as-comments", cl::Hidden,
116 cl::desc("Preserve Comments in outputted assembly"),
117 cl::init(true));
118
119// Determine optimization level.
120static cl::opt<char>
121OptLevel("O",
122 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
123 "(default = '-O2')"),
124 cl::Prefix,
125 cl::ZeroOrMore,
126 cl::init(' '));
127
128static cl::opt<std::string>
129TargetTriple("mtriple", cl::desc("Override target triple for module"));
130
131static cl::opt<std::string> SplitDwarfFile(
132 "split-dwarf-file",
133 cl::desc(
134 "Specify the name of the .dwo file to encode in the DWARF output"));
135
136static cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
137 cl::desc("Do not verify input module"));
138
139static cl::opt<bool> DisableSimplifyLibCalls("disable-simplify-libcalls",
140 cl::desc("Disable simplify-libcalls"));
141
142static cl::opt<bool> ShowMCEncoding("show-mc-encoding", cl::Hidden,
143 cl::desc("Show encoding in .s output"));
144
145static cl::opt<bool>
146 DwarfDirectory("dwarf-directory", cl::Hidden,
147 cl::desc("Use .file directives with an explicit directory"),
148 cl::init(true));
149
150static cl::opt<bool> AsmVerbose("asm-verbose",
151 cl::desc("Add comments to directives."),
152 cl::init(true));
153
154static cl::opt<bool>
155 CompileTwice("compile-twice", cl::Hidden,
156 cl::desc("Run everything twice, re-using the same pass "
157 "manager and verify the result is the same."),
158 cl::init(false));
159
160static cl::opt<bool> DiscardValueNames(
161 "discard-value-names",
162 cl::desc("Discard names from Value (other than GlobalValue)."),
163 cl::init(false), cl::Hidden);
164
165static cl::list<std::string> IncludeDirs("I", cl::desc("include search path"));
166
167static cl::opt<bool> RemarksWithHotness(
168 "pass-remarks-with-hotness",
169 cl::desc("With PGO, include profile count in optimization remarks"),
170 cl::Hidden);
171
172static cl::opt<Optional<uint64_t>, false, remarks::HotnessThresholdParser>
173 RemarksHotnessThreshold(
174 "pass-remarks-hotness-threshold",
175 cl::desc("Minimum profile count required for "
176 "an optimization remark to be output. "
177 "Use 'auto' to apply the threshold from profile summary."),
178 cl::value_desc("N or 'auto'"), cl::init(0), cl::Hidden);
179
180static cl::opt<std::string>
181 RemarksFilename("pass-remarks-output",
182 cl::desc("Output filename for pass remarks"),
183 cl::value_desc("filename"));
184
185static cl::opt<std::string>
186 RemarksPasses("pass-remarks-filter",
187 cl::desc("Only record optimization remarks from passes whose "
188 "names match the given regular expression"),
189 cl::value_desc("regex"));
190
191static cl::opt<std::string> RemarksFormat(
192 "pass-remarks-format",
193 cl::desc("The format used for serializing remarks (default: YAML)"),
194 cl::value_desc("format"), cl::init("yaml"));
195
196namespace {
197static ManagedStatic<std::vector<std::string>> RunPassNames;
198
199struct RunPassOption {
200 void operator=(const std::string &Val) const {
201 if (Val.empty())
202 return;
203 SmallVector<StringRef, 8> PassNames;
204 StringRef(Val).split(PassNames, ',', -1, false);
205 for (auto PassName : PassNames)
206 RunPassNames->push_back(std::string(PassName));
207 }
208};
209}
210
211static RunPassOption RunPassOpt;
212
213static cl::opt<RunPassOption, true, cl::parser<std::string>> RunPass(
214 "run-pass",
215 cl::desc("Run compiler only for specified passes (comma separated list)"),
216 cl::value_desc("pass-name"), cl::ZeroOrMore, cl::location(RunPassOpt));
217
218static int compileModule(char **, LLVMContext &);
219
220[[noreturn]] static void reportError(Twine Msg, StringRef Filename = "") {
221 SmallString<256> Prefix;
222 if (!Filename.empty()) {
223 if (Filename == "-")
224 Filename = "<stdin>";
225 ("'" + Twine(Filename) + "': ").toStringRef(Prefix);
226 }
227 WithColor::error(errs(), "llc") << Prefix << Msg << "\n";
228 exit(1);
229}
230
231[[noreturn]] static void reportError(Error Err, StringRef Filename) {
232 assert(Err)(static_cast <bool> (Err) ? void (0) : __assert_fail ("Err"
, "llvm/tools/llc/llc.cpp", 232, __extension__ __PRETTY_FUNCTION__
));
233 handleAllErrors(createFileError(Filename, std::move(Err)),
234 [&](const ErrorInfoBase &EI) { reportError(EI.message()); });
235 llvm_unreachable("reportError() should not return")::llvm::llvm_unreachable_internal("reportError() should not return"
, "llvm/tools/llc/llc.cpp", 235);
236}
237
238static std::unique_ptr<ToolOutputFile> GetOutputStream(const char *TargetName,
239 Triple::OSType OS,
240 const char *ProgName) {
241 // If we don't yet have an output filename, make one.
242 if (OutputFilename.empty()) {
243 if (InputFilename == "-")
244 OutputFilename = "-";
245 else {
246 // If InputFilename ends in .bc or .ll, remove it.
247 StringRef IFN = InputFilename;
248 if (IFN.endswith(".bc") || IFN.endswith(".ll"))
249 OutputFilename = std::string(IFN.drop_back(3));
250 else if (IFN.endswith(".mir"))
251 OutputFilename = std::string(IFN.drop_back(4));
252 else
253 OutputFilename = std::string(IFN);
254
255 switch (codegen::getFileType()) {
256 case CGFT_AssemblyFile:
257 if (TargetName[0] == 'c') {
258 if (TargetName[1] == 0)
259 OutputFilename += ".cbe.c";
260 else if (TargetName[1] == 'p' && TargetName[2] == 'p')
261 OutputFilename += ".cpp";
262 else
263 OutputFilename += ".s";
264 } else
265 OutputFilename += ".s";
266 break;
267 case CGFT_ObjectFile:
268 if (OS == Triple::Win32)
269 OutputFilename += ".obj";
270 else
271 OutputFilename += ".o";
272 break;
273 case CGFT_Null:
274 OutputFilename = "-";
275 break;
276 }
277 }
278 }
279
280 // Decide if we need "binary" output.
281 bool Binary = false;
282 switch (codegen::getFileType()) {
283 case CGFT_AssemblyFile:
284 break;
285 case CGFT_ObjectFile:
286 case CGFT_Null:
287 Binary = true;
288 break;
289 }
290
291 // Open the file.
292 std::error_code EC;
293 sys::fs::OpenFlags OpenFlags = sys::fs::OF_None;
294 if (!Binary)
295 OpenFlags |= sys::fs::OF_TextWithCRLF;
296 auto FDOut = std::make_unique<ToolOutputFile>(OutputFilename, EC, OpenFlags);
297 if (EC) {
298 reportError(EC.message());
299 return nullptr;
300 }
301
302 return FDOut;
303}
304
305struct LLCDiagnosticHandler : public DiagnosticHandler {
306 bool *HasError;
307 LLCDiagnosticHandler(bool *HasErrorPtr) : HasError(HasErrorPtr) {}
308 bool handleDiagnostics(const DiagnosticInfo &DI) override {
309 if (DI.getKind() == llvm::DK_SrcMgr) {
310 const auto &DISM = cast<DiagnosticInfoSrcMgr>(DI);
311 const SMDiagnostic &SMD = DISM.getSMDiag();
312
313 if (SMD.getKind() == SourceMgr::DK_Error)
314 *HasError = true;
315
316 SMD.print(nullptr, errs());
317
318 // For testing purposes, we print the LocCookie here.
319 if (DISM.isInlineAsmDiag() && DISM.getLocCookie())
320 WithColor::note() << "!srcloc = " << DISM.getLocCookie() << "\n";
321
322 return true;
323 }
324
325 if (DI.getSeverity() == DS_Error)
326 *HasError = true;
327
328 if (auto *Remark = dyn_cast<DiagnosticInfoOptimizationBase>(&DI))
329 if (!Remark->isEnabled())
330 return true;
331
332 DiagnosticPrinterRawOStream DP(errs());
333 errs() << LLVMContext::getDiagnosticMessagePrefix(DI.getSeverity()) << ": ";
334 DI.print(DP);
335 errs() << "\n";
336 return true;
337 }
338};
339
340// main - Entry point for the llc compiler.
341//
342int main(int argc, char **argv) {
343 InitLLVM X(argc, argv);
344
345 // Enable debug stream buffering.
346 EnableDebugBuffering = true;
347
348 // Initialize targets first, so that --version shows registered targets.
349 InitializeAllTargets();
350 InitializeAllTargetMCs();
351 InitializeAllAsmPrinters();
352 InitializeAllAsmParsers();
353
354 // Initialize codegen and IR passes used by llc so that the -print-after,
355 // -print-before, and -stop-after options work.
356 PassRegistry *Registry = PassRegistry::getPassRegistry();
357 initializeCore(*Registry);
358 initializeCodeGen(*Registry);
359 initializeLoopStrengthReducePass(*Registry);
360 initializeLowerIntrinsicsPass(*Registry);
361 initializeEntryExitInstrumenterPass(*Registry);
362 initializePostInlineEntryExitInstrumenterPass(*Registry);
363 initializeUnreachableBlockElimLegacyPassPass(*Registry);
364 initializeConstantHoistingLegacyPassPass(*Registry);
365 initializeScalarOpts(*Registry);
366 initializeVectorization(*Registry);
367 initializeScalarizeMaskedMemIntrinLegacyPassPass(*Registry);
368 initializeExpandReductionsPass(*Registry);
369 initializeExpandVectorPredicationPass(*Registry);
370 initializeHardwareLoopsPass(*Registry);
371 initializeTransformUtils(*Registry);
372 initializeReplaceWithVeclibLegacyPass(*Registry);
373 initializeTLSVariableHoistLegacyPassPass(*Registry);
374
375 // Initialize debugging passes.
376 initializeScavengerTestPass(*Registry);
377
378 // Register the target printer for --version.
379 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
380
381 cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
382
383 if (TimeTrace)
384 timeTraceProfilerInitialize(TimeTraceGranularity, argv[0]);
385 auto TimeTraceScopeExit = make_scope_exit([]() {
386 if (TimeTrace) {
387 if (auto E = timeTraceProfilerWrite(TimeTraceFile, OutputFilename)) {
388 handleAllErrors(std::move(E), [&](const StringError &SE) {
389 errs() << SE.getMessage() << "\n";
390 });
391 return;
392 }
393 timeTraceProfilerCleanup();
394 }
395 });
396
397 LLVMContext Context;
398 Context.setDiscardValueNames(DiscardValueNames);
399
400 // Set a diagnostic handler that doesn't exit on the first error
401 bool HasError = false;
402 Context.setDiagnosticHandler(
403 std::make_unique<LLCDiagnosticHandler>(&HasError));
404
405 Expected<std::unique_ptr<ToolOutputFile>> RemarksFileOrErr =
406 setupLLVMOptimizationRemarks(Context, RemarksFilename, RemarksPasses,
407 RemarksFormat, RemarksWithHotness,
408 RemarksHotnessThreshold);
409 if (Error E = RemarksFileOrErr.takeError())
410 reportError(std::move(E), RemarksFilename);
411 std::unique_ptr<ToolOutputFile> RemarksFile = std::move(*RemarksFileOrErr);
412
413 if (InputLanguage != "" && InputLanguage != "ir" && InputLanguage != "mir")
414 reportError("input language must be '', 'IR' or 'MIR'");
415
416 // Compile the module TimeCompilations times to give better compile time
417 // metrics.
418 for (unsigned I = TimeCompilations; I; --I)
419 if (int RetVal = compileModule(argv, Context))
420 return RetVal;
421
422 if (RemarksFile)
423 RemarksFile->keep();
424 return 0;
425}
426
427static bool addPass(PassManagerBase &PM, const char *argv0,
428 StringRef PassName, TargetPassConfig &TPC) {
429 if (PassName == "none")
430 return false;
431
432 const PassRegistry *PR = PassRegistry::getPassRegistry();
433 const PassInfo *PI = PR->getPassInfo(PassName);
434 if (!PI) {
435 WithColor::error(errs(), argv0)
436 << "run-pass " << PassName << " is not registered.\n";
437 return true;
438 }
439
440 Pass *P;
441 if (PI->getNormalCtor())
442 P = PI->getNormalCtor()();
443 else {
444 WithColor::error(errs(), argv0)
445 << "cannot create pass: " << PI->getPassName() << "\n";
446 return true;
447 }
448 std::string Banner = std::string("After ") + std::string(P->getPassName());
449 TPC.addMachinePrePasses();
450 PM.add(P);
451 TPC.addMachinePostPasses(Banner);
452
453 return false;
454}
455
456static int compileModule(char **argv, LLVMContext &Context) {
457 // Load the module to be compiled...
458 SMDiagnostic Err;
459 std::unique_ptr<Module> M;
460 std::unique_ptr<MIRParser> MIR;
461 Triple TheTriple;
462 std::string CPUStr = codegen::getCPUStr(),
463 FeaturesStr = codegen::getFeaturesStr();
464
465 // Set attributes on functions as loaded from MIR from command line arguments.
466 auto setMIRFunctionAttributes = [&CPUStr, &FeaturesStr](Function &F) {
467 codegen::setFunctionAttributes(CPUStr, FeaturesStr, F);
468 };
469
470 auto MAttrs = codegen::getMAttrs();
471 bool SkipModule = codegen::getMCPU() == "help" ||
472 (!MAttrs.empty() && MAttrs.front() == "help");
1
Assuming the condition is false
→
473
474 CodeGenOpt::Level OLvl = CodeGenOpt::Default;
475 switch (OptLevel) {
2
←
Control jumps to 'case 32:' at line 479
→
476 default:
477 WithColor::error(errs(), argv[0]) << "invalid optimization level.\n";
478 return 1;
479 case ' ': break;
480 case '0': OLvl = CodeGenOpt::None; break;
481 case '1': OLvl = CodeGenOpt::Less; break;
482 case '2': OLvl = CodeGenOpt::Default; break;
483 case '3': OLvl = CodeGenOpt::Aggressive; break;
484 }
485
486 // Parse 'none' or '$major.$minor'. Disallow -binutils-version=0 because we
487 // use that to indicate the MC default.
488 if (!BinutilsVersion.empty() && BinutilsVersion != "none") {
3
←
Assuming the condition is false
→
489 StringRef V = BinutilsVersion.getValue();
490 unsigned Num;
491 if (V.consumeInteger(10, Num) || Num == 0 ||
492 !(V.empty() ||
493 (V.consume_front(".") && !V.consumeInteger(10, Num) && V.empty()))) {
494 WithColor::error(errs(), argv[0])
495 << "invalid -binutils-version, accepting 'none' or major.minor\n";
496 return 1;
497 }
498 }
499 TargetOptions Options;
500 auto InitializeOptions = [&](const Triple &TheTriple) {
501 Options = codegen::InitTargetOptionsFromCodeGenFlags(TheTriple);
502 Options.BinutilsVersion =
503 TargetMachine::parseBinutilsVersion(BinutilsVersion);
504 Options.DisableIntegratedAS = NoIntegratedAssembler;
505 Options.MCOptions.ShowMCEncoding = ShowMCEncoding;
506 Options.MCOptions.MCUseDwarfDirectory = DwarfDirectory;
507 Options.MCOptions.AsmVerbose = AsmVerbose;
508 Options.MCOptions.PreserveAsmComments = PreserveComments;
509 Options.MCOptions.IASSearchPaths = IncludeDirs;
510 Options.MCOptions.SplitDwarfFile = SplitDwarfFile;
511 };
512
513 Optional<Reloc::Model> RM = codegen::getExplicitRelocModel();
514
515 const Target *TheTarget = nullptr;
516 std::unique_ptr<TargetMachine> Target;
517
518 // If user just wants to list available options, skip module loading
519 if (!SkipModule
3.1
'SkipModule' is false
) {
4
←
Taking true branch
→
520 auto SetDataLayout =
521 [&](StringRef DataLayoutTargetTriple) -> Optional<std::string> {
522 // If we are supposed to override the target triple, do so now.
523 std::string IRTargetTriple = DataLayoutTargetTriple.str();
524 if (!TargetTriple.empty())
525 IRTargetTriple = Triple::normalize(TargetTriple);
526 TheTriple = Triple(IRTargetTriple);
527 if (TheTriple.getTriple().empty())
528 TheTriple.setTriple(sys::getDefaultTargetTriple());
529
530 std::string Error;
531 TheTarget =
532 TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
533 if (!TheTarget) {
534 WithColor::error(errs(), argv[0]) << Error;
535 exit(1);
536 }
537
538 // On AIX, setting the relocation model to anything other than PIC is
539 // considered a user error.
540 if (TheTriple.isOSAIX() && RM.hasValue() && *RM != Reloc::PIC_)
541 reportError("invalid relocation model, AIX only supports PIC",
542 InputFilename);
543
544 InitializeOptions(TheTriple);
545 Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
546 TheTriple.getTriple(), CPUStr, FeaturesStr, Options, RM,
547 codegen::getExplicitCodeModel(), OLvl));
548 assert(Target && "Could not allocate target machine!")(static_cast <bool> (Target && "Could not allocate target machine!"
) ? void (0) : __assert_fail ("Target && \"Could not allocate target machine!\""
, "llvm/tools/llc/llc.cpp", 548, __extension__ __PRETTY_FUNCTION__
));
549
550 return Target->createDataLayout().getStringRepresentation();
551 };
552 if (InputLanguage == "mir" ||
5
←
Taking false branch
→
553 (InputLanguage == "" && StringRef(InputFilename).endswith(".mir"))) {
554 MIR = createMIRParserFromFile(InputFilename, Err, Context,
555 setMIRFunctionAttributes);
556 if (MIR)
557 M = MIR->parseIRModule(SetDataLayout);
558 } else {
559 M = parseIRFile(InputFilename, Err, Context, SetDataLayout);
560 }
561 if (!M) {
6
←
Taking false branch
→
562 Err.print(argv[0], WithColor::error(errs(), argv[0]));
563 return 1;
564 }
565 if (!TargetTriple.empty())
7
←
Assuming the condition is false
→
566 M->setTargetTriple(Triple::normalize(TargetTriple));
567 } else {
568 TheTriple = Triple(Triple::normalize(TargetTriple));
569 if (TheTriple.getTriple().empty())
570 TheTriple.setTriple(sys::getDefaultTargetTriple());
571
572 // Get the target specific parser.
573 std::string Error;
574 TheTarget =
575 TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
576 if (!TheTarget) {
577 WithColor::error(errs(), argv[0]) << Error;
578 return 1;
579 }
580
581 // On AIX, setting the relocation model to anything other than PIC is
582 // considered a user error.
583 if (TheTriple.isOSAIX() && RM.hasValue() && *RM != Reloc::PIC_) {
584 WithColor::error(errs(), argv[0])
585 << "invalid relocation model, AIX only supports PIC.\n";
586 return 1;
587 }
588
589 InitializeOptions(TheTriple);
590 Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
591 TheTriple.getTriple(), CPUStr, FeaturesStr, Options, RM,
592 codegen::getExplicitCodeModel(), OLvl));
593 assert(Target && "Could not allocate target machine!")(static_cast <bool> (Target && "Could not allocate target machine!"
) ? void (0) : __assert_fail ("Target && \"Could not allocate target machine!\""
, "llvm/tools/llc/llc.cpp", 593, __extension__ __PRETTY_FUNCTION__
));
594
595 // If we don't have a module then just exit now. We do this down
596 // here since the CPU/Feature help is underneath the target machine
597 // creation.
598 return 0;
599 }
600
601 assert(M && "Should have exited if we didn't have a module!")(static_cast <bool> (M && "Should have exited if we didn't have a module!"
) ? void (0) : __assert_fail ("M && \"Should have exited if we didn't have a module!\""
, "llvm/tools/llc/llc.cpp", 601, __extension__ __PRETTY_FUNCTION__
));
8
←
Taking false branch
→
9
←
'?' condition is true
→
602 if (codegen::getFloatABIForCalls() != FloatABI::Default)
10
←
Assuming the condition is false
→
11
←
Taking false branch
→
603 Options.FloatABIType = codegen::getFloatABIForCalls();
604
605 // Figure out where we are going to send the output.
606 std::unique_ptr<ToolOutputFile> Out =
607 GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]);
608 if (!Out) return 1;
12
←
Taking false branch
→
609
610 // Ensure the filename is passed down to CodeViewDebug.
611 Target->Options.ObjectFilenameForDebug = Out->outputFilename();
612
613 std::unique_ptr<ToolOutputFile> DwoOut;
614 if (!SplitDwarfOutputFile.empty()) {
13
←
Assuming the condition is false
→
14
←
Taking false branch
→
615 std::error_code EC;
616 DwoOut = std::make_unique<ToolOutputFile>(SplitDwarfOutputFile, EC,
617 sys::fs::OF_None);
618 if (EC)
619 reportError(EC.message(), SplitDwarfOutputFile);
620 }
621
622 // Build up all of the passes that we want to do to the module.
623 legacy::PassManager PM;
624
625 // Add an appropriate TargetLibraryInfo pass for the module's triple.
626 TargetLibraryInfoImpl TLII(Triple(M->getTargetTriple()));
627
628 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
629 if (DisableSimplifyLibCalls)
15
←
Assuming the condition is true
→
16
←
Taking true branch
→
630 TLII.disableAllFunctions();
631 PM.add(new TargetLibraryInfoWrapperPass(TLII));
632
633 // Verify module immediately to catch problems before doInitialization() is
634 // called on any passes.
635 if (!NoVerify && verifyModule(*M, &errs()))
17
←
Assuming the condition is false
→
636 reportError("input module cannot be verified", InputFilename);
637
638 // Override function attributes based on CPUStr, FeaturesStr, and command line
639 // flags.
640 codegen::setFunctionAttributes(CPUStr, FeaturesStr, *M);
641
642 if (mc::getExplicitRelaxAll() && codegen::getFileType() != CGFT_ObjectFile)
18
←
Assuming the condition is true
→
19
←
Assuming the condition is true
→
20
←
Taking true branch
→
643 WithColor::warning(errs(), argv[0])
644 << ": warning: ignoring -mc-relax-all because filetype != obj";
645
646 {
647 raw_pwrite_stream *OS = &Out->os();
648
649 // Manually do the buffering rather than using buffer_ostream,
650 // so we can memcmp the contents in CompileTwice mode
651 SmallVector<char, 0> Buffer;
652 std::unique_ptr<raw_svector_ostream> BOS;
653 if ((codegen::getFileType() != CGFT_AssemblyFile &&
21
←
Assuming the condition is false
→
23
←
Taking false branch
→
654 !Out->os().supportsSeeking()) ||
655 CompileTwice) {
22
←
Assuming the condition is false
→
656 BOS = std::make_unique<raw_svector_ostream>(Buffer);
657 OS = BOS.get();
658 }
659
660 const char *argv0 = argv[0];
661 LLVMTargetMachine &LLVMTM = static_cast<LLVMTargetMachine &>(*Target);
662 MachineModuleInfoWrapperPass *MMIWP =
663 new MachineModuleInfoWrapperPass(&LLVMTM);
24
←
Memory is allocated
→
664
665 // Construct a custom pass pipeline that starts after instruction
666 // selection.
667 if (!RunPassNames->empty()) {
25
←
Assuming the condition is true
→
26
←
Taking true branch
→
668 if (!MIR) {
27
←
Taking true branch
→
669 WithColor::warning(errs(), argv[0])
670 << "run-pass is for .mir file only.\n";
28
←
Potential leak of memory pointed to by 'MMIWP'
671 return 1;
672 }
673 TargetPassConfig &TPC = *LLVMTM.createPassConfig(PM);
674 if (TPC.hasLimitedCodeGenPipeline()) {
675 WithColor::warning(errs(), argv[0])
676 << "run-pass cannot be used with "
677 << TPC.getLimitedCodeGenPipelineReason(" and ") << ".\n";
678 return 1;
679 }
680
681 TPC.setDisableVerify(NoVerify);
682 PM.add(&TPC);
683 PM.add(MMIWP);
684 TPC.printAndVerify("");
685 for (const std::string &RunPassName : *RunPassNames) {
686 if (addPass(PM, argv0, RunPassName, TPC))
687 return 1;
688 }
689 TPC.setInitialized();
690 PM.add(createPrintMIRPass(*OS));
691 PM.add(createFreeMachineFunctionPass());
692 } else if (Target->addPassesToEmitFile(
693 PM, *OS, DwoOut ? &DwoOut->os() : nullptr,
694 codegen::getFileType(), NoVerify, MMIWP)) {
695 reportError("target does not support generation of this file type");
696 }
697
698 const_cast<TargetLoweringObjectFile *>(LLVMTM.getObjFileLowering())
699 ->Initialize(MMIWP->getMMI().getContext(), *Target);
700 if (MIR) {
701 assert(MMIWP && "Forgot to create MMIWP?")(static_cast <bool> (MMIWP && "Forgot to create MMIWP?"
) ? void (0) : __assert_fail ("MMIWP && \"Forgot to create MMIWP?\""
, "llvm/tools/llc/llc.cpp", 701, __extension__ __PRETTY_FUNCTION__
));
702 if (MIR->parseMachineFunctions(*M, MMIWP->getMMI()))
703 return 1;
704 }
705
706 // Before executing passes, print the final values of the LLVM options.
707 cl::PrintOptionValues();
708
709 // If requested, run the pass manager over the same module again,
710 // to catch any bugs due to persistent state in the passes. Note that
711 // opt has the same functionality, so it may be worth abstracting this out
712 // in the future.
713 SmallVector<char, 0> CompileTwiceBuffer;
714 if (CompileTwice) {
715 std::unique_ptr<Module> M2(llvm::CloneModule(*M));
716 PM.run(*M2);
717 CompileTwiceBuffer = Buffer;
718 Buffer.clear();
719 }
720
721 PM.run(*M);
722
723 auto HasError =
724 ((const LLCDiagnosticHandler *)(Context.getDiagHandlerPtr()))->HasError;
725 if (*HasError)
726 return 1;
727
728 // Compare the two outputs and make sure they're the same
729 if (CompileTwice) {
730 if (Buffer.size() != CompileTwiceBuffer.size() ||
731 (memcmp(Buffer.data(), CompileTwiceBuffer.data(), Buffer.size()) !=
732 0)) {
733 errs()
734 << "Running the pass manager twice changed the output.\n"
735 "Writing the result of the second run to the specified output\n"
736 "To generate the one-run comparison binary, just run without\n"
737 "the compile-twice option\n";
738 Out->os() << Buffer;
739 Out->keep();
740 return 1;
741 }
742 }
743
744 if (BOS) {
745 Out->os() << Buffer;
746 }
747 }
748
749 // Declare success.
750 Out->keep();
751 if (DwoOut)
752 DwoOut->keep();
753
754 return 0;
755}