LCOV - code coverage report
Current view: top level - include/llvm/CodeGen - CommandFlags.inc (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 67 77 87.0 %
Date: 2018-10-20 13:21:21 Functions: 5 5 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===//
       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             : // This file contains codegen-specific flags that are shared between different
      11             : // command line tools. The tools "llc" and "opt" both use this file to prevent
      12             : // flag duplication.
      13             : //
      14             : //===----------------------------------------------------------------------===//
      15             : 
      16             : #include "llvm/ADT/StringExtras.h"
      17             : #include "llvm/IR/Instructions.h"
      18             : #include "llvm/IR/Intrinsics.h"
      19             : #include "llvm/IR/Module.h"
      20             : #include "llvm/MC/MCTargetOptionsCommandFlags.inc"
      21             : #include "llvm/MC/SubtargetFeature.h"
      22             : #include "llvm/Support/CodeGen.h"
      23             : #include "llvm/Support/CommandLine.h"
      24             : #include "llvm/Support/Host.h"
      25             : #include "llvm/Target/TargetMachine.h"
      26             : #include "llvm/Target/TargetOptions.h"
      27             : #include <string>
      28             : using namespace llvm;
      29             : 
      30             : static cl::opt<std::string>
      31             :     MArch("march",
      32             :           cl::desc("Architecture to generate code for (see --version)"));
      33             : 
      34             : static cl::opt<std::string>
      35             :     MCPU("mcpu",
      36             :          cl::desc("Target a specific cpu type (-mcpu=help for details)"),
      37             :          cl::value_desc("cpu-name"), cl::init(""));
      38             : 
      39             : static cl::list<std::string>
      40             :     MAttrs("mattr", cl::CommaSeparated,
      41             :            cl::desc("Target specific attributes (-mattr=help for details)"),
      42             :            cl::value_desc("a1,+a2,-a3,..."));
      43             : 
      44             : static cl::opt<Reloc::Model> RelocModel(
      45             :     "relocation-model", cl::desc("Choose relocation model"),
      46             :     cl::values(
      47             :         clEnumValN(Reloc::Static, "static", "Non-relocatable code"),
      48             :         clEnumValN(Reloc::PIC_, "pic",
      49             :                    "Fully relocatable, position independent code"),
      50             :         clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
      51             :                    "Relocatable external references, non-relocatable code"),
      52             :         clEnumValN(Reloc::ROPI, "ropi",
      53             :                    "Code and read-only data relocatable, accessed PC-relative"),
      54             :         clEnumValN(
      55             :             Reloc::RWPI, "rwpi",
      56             :             "Read-write data relocatable, accessed relative to static base"),
      57             :         clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi",
      58             :                    "Combination of ropi and rwpi")));
      59             : 
      60             : LLVM_ATTRIBUTE_UNUSED static Optional<Reloc::Model> getRelocModel() {
      61       25266 :   if (RelocModel.getNumOccurrences()) {
      62             :     Reloc::Model R = RelocModel;
      63             :     return R;
      64             :   }
      65             :   return None;
      66             : }
      67             : 
      68             : static cl::opt<ThreadModel::Model> TMModel(
      69             :     "thread-model", cl::desc("Choose threading model"),
      70             :     cl::init(ThreadModel::POSIX),
      71             :     cl::values(clEnumValN(ThreadModel::POSIX, "posix", "POSIX thread model"),
      72             :                clEnumValN(ThreadModel::Single, "single",
      73             :                           "Single thread model")));
      74             : 
      75             : static cl::opt<llvm::CodeModel::Model> CMModel(
      76             :     "code-model", cl::desc("Choose code model"),
      77             :     cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny code model"),
      78             :                clEnumValN(CodeModel::Small, "small", "Small code model"),
      79             :                clEnumValN(CodeModel::Kernel, "kernel", "Kernel code model"),
      80             :                clEnumValN(CodeModel::Medium, "medium", "Medium code model"),
      81             :                clEnumValN(CodeModel::Large, "large", "Large code model")));
      82             : 
      83             : LLVM_ATTRIBUTE_UNUSED static Optional<CodeModel::Model> getCodeModel() {
      84       25393 :   if (CMModel.getNumOccurrences()) {
      85             :     CodeModel::Model M = CMModel;
      86             :     return M;
      87             :   }
      88             :   return None;
      89             : }
      90             : 
      91             : static cl::opt<llvm::ExceptionHandling> ExceptionModel(
      92             :     "exception-model", cl::desc("exception model"),
      93             :     cl::init(ExceptionHandling::None),
      94             :     cl::values(
      95             :         clEnumValN(ExceptionHandling::None, "default",
      96             :                    "default exception handling model"),
      97             :         clEnumValN(ExceptionHandling::DwarfCFI, "dwarf",
      98             :                    "DWARF-like CFI based exception handling"),
      99             :         clEnumValN(ExceptionHandling::SjLj, "sjlj", "SjLj exception handling"),
     100             :         clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"),
     101             :         clEnumValN(ExceptionHandling::WinEH, "wineh",
     102             :                    "Windows exception model"),
     103             :         clEnumValN(ExceptionHandling::Wasm, "wasm",
     104             :                    "WebAssembly exception handling")));
     105             : 
     106             : static cl::opt<TargetMachine::CodeGenFileType> FileType(
     107             :     "filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
     108             :     cl::desc(
     109             :         "Choose a file type (not all types are supported by all targets):"),
     110             :     cl::values(clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
     111             :                           "Emit an assembly ('.s') file"),
     112             :                clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
     113             :                           "Emit a native object ('.o') file"),
     114             :                clEnumValN(TargetMachine::CGFT_Null, "null",
     115             :                           "Emit nothing, for performance testing")));
     116             : 
     117             : static cl::opt<bool>
     118             :     DisableFPElim("disable-fp-elim",
     119             :                   cl::desc("Disable frame pointer elimination optimization"),
     120             :                   cl::init(false));
     121             : 
     122             : static cl::opt<bool> EnableUnsafeFPMath(
     123             :     "enable-unsafe-fp-math",
     124             :     cl::desc("Enable optimizations that may decrease FP precision"),
     125             :     cl::init(false));
     126             : 
     127             : static cl::opt<bool> EnableNoInfsFPMath(
     128             :     "enable-no-infs-fp-math",
     129             :     cl::desc("Enable FP math optimizations that assume no +-Infs"),
     130             :     cl::init(false));
     131             : 
     132             : static cl::opt<bool> EnableNoNaNsFPMath(
     133             :     "enable-no-nans-fp-math",
     134             :     cl::desc("Enable FP math optimizations that assume no NaNs"),
     135             :     cl::init(false));
     136             : 
     137             : static cl::opt<bool> EnableNoSignedZerosFPMath(
     138             :     "enable-no-signed-zeros-fp-math",
     139             :     cl::desc("Enable FP math optimizations that assume "
     140             :              "the sign of 0 is insignificant"),
     141             :     cl::init(false));
     142             : 
     143             : static cl::opt<bool>
     144             :     EnableNoTrappingFPMath("enable-no-trapping-fp-math",
     145             :                            cl::desc("Enable setting the FP exceptions build "
     146             :                                     "attribute not to use exceptions"),
     147             :                            cl::init(false));
     148             : 
     149             : static cl::opt<llvm::FPDenormal::DenormalMode> DenormalMode(
     150             :     "denormal-fp-math",
     151             :     cl::desc("Select which denormal numbers the code is permitted to require"),
     152             :     cl::init(FPDenormal::IEEE),
     153             :     cl::values(clEnumValN(FPDenormal::IEEE, "ieee",
     154             :                           "IEEE 754 denormal numbers"),
     155             :                clEnumValN(FPDenormal::PreserveSign, "preserve-sign",
     156             :                           "the sign of a  flushed-to-zero number is preserved "
     157             :                           "in the sign of 0"),
     158             :                clEnumValN(FPDenormal::PositiveZero, "positive-zero",
     159             :                           "denormals are flushed to positive zero")));
     160             : 
     161             : static cl::opt<bool> EnableHonorSignDependentRoundingFPMath(
     162             :     "enable-sign-dependent-rounding-fp-math", cl::Hidden,
     163             :     cl::desc("Force codegen to assume rounding mode can change dynamically"),
     164             :     cl::init(false));
     165             : 
     166             : static cl::opt<llvm::FloatABI::ABIType> FloatABIForCalls(
     167             :     "float-abi", cl::desc("Choose float ABI type"), cl::init(FloatABI::Default),
     168             :     cl::values(clEnumValN(FloatABI::Default, "default",
     169             :                           "Target default float ABI type"),
     170             :                clEnumValN(FloatABI::Soft, "soft",
     171             :                           "Soft float ABI (implied by -soft-float)"),
     172             :                clEnumValN(FloatABI::Hard, "hard",
     173             :                           "Hard float ABI (uses FP registers)")));
     174             : 
     175             : static cl::opt<llvm::FPOpFusion::FPOpFusionMode> FuseFPOps(
     176             :     "fp-contract", cl::desc("Enable aggressive formation of fused FP ops"),
     177             :     cl::init(FPOpFusion::Standard),
     178             :     cl::values(
     179             :         clEnumValN(FPOpFusion::Fast, "fast", "Fuse FP ops whenever profitable"),
     180             :         clEnumValN(FPOpFusion::Standard, "on", "Only fuse 'blessed' FP ops."),
     181             :         clEnumValN(FPOpFusion::Strict, "off",
     182             :                    "Only fuse FP ops when the result won't be affected.")));
     183             : 
     184             : static cl::opt<bool> DontPlaceZerosInBSS(
     185             :     "nozero-initialized-in-bss",
     186             :     cl::desc("Don't place zero-initialized symbols into bss section"),
     187             :     cl::init(false));
     188             : 
     189             : static cl::opt<bool> EnableGuaranteedTailCallOpt(
     190             :     "tailcallopt",
     191             :     cl::desc(
     192             :         "Turn fastcc calls into tail calls by (potentially) changing ABI."),
     193             :     cl::init(false));
     194             : 
     195             : static cl::opt<bool> DisableTailCalls("disable-tail-calls",
     196             :                                       cl::desc("Never emit tail calls"),
     197             :                                       cl::init(false));
     198             : 
     199             : static cl::opt<bool> StackSymbolOrdering("stack-symbol-ordering",
     200             :                                          cl::desc("Order local stack symbols."),
     201             :                                          cl::init(true));
     202             : 
     203             : static cl::opt<unsigned>
     204             :     OverrideStackAlignment("stack-alignment",
     205             :                            cl::desc("Override default stack alignment"),
     206             :                            cl::init(0));
     207             : 
     208             : static cl::opt<bool>
     209             :     StackRealign("stackrealign",
     210             :                  cl::desc("Force align the stack to the minimum alignment"),
     211             :                  cl::init(false));
     212             : 
     213             : static cl::opt<std::string> TrapFuncName(
     214             :     "trap-func", cl::Hidden,
     215             :     cl::desc("Emit a call to trap function rather than a trap instruction"),
     216             :     cl::init(""));
     217             : 
     218             : static cl::opt<bool> UseCtors("use-ctors",
     219             :                               cl::desc("Use .ctors instead of .init_array."),
     220             :                               cl::init(false));
     221             : 
     222             : static cl::opt<bool> RelaxELFRelocations(
     223             :     "relax-elf-relocations",
     224             :     cl::desc("Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"),
     225             :     cl::init(false));
     226             : 
     227             : static cl::opt<bool> DataSections("data-sections",
     228             :                                   cl::desc("Emit data into separate sections"),
     229             :                                   cl::init(false));
     230             : 
     231             : static cl::opt<bool>
     232             :     FunctionSections("function-sections",
     233             :                      cl::desc("Emit functions into separate sections"),
     234             :                      cl::init(false));
     235             : 
     236             : static cl::opt<bool> EmulatedTLS("emulated-tls",
     237             :                                  cl::desc("Use emulated TLS model"),
     238             :                                  cl::init(false));
     239             : 
     240             : static cl::opt<bool>
     241             :     UniqueSectionNames("unique-section-names",
     242             :                        cl::desc("Give unique names to every section"),
     243             :                        cl::init(true));
     244             : 
     245             : static cl::opt<llvm::EABI>
     246             :     EABIVersion("meabi", cl::desc("Set EABI type (default depends on triple):"),
     247             :                 cl::init(EABI::Default),
     248             :                 cl::values(clEnumValN(EABI::Default, "default",
     249             :                                       "Triple default EABI version"),
     250             :                            clEnumValN(EABI::EABI4, "4", "EABI version 4"),
     251             :                            clEnumValN(EABI::EABI5, "5", "EABI version 5"),
     252             :                            clEnumValN(EABI::GNU, "gnu", "EABI GNU")));
     253             : 
     254             : static cl::opt<DebuggerKind> DebuggerTuningOpt(
     255             :     "debugger-tune", cl::desc("Tune debug info for a particular debugger"),
     256             :     cl::init(DebuggerKind::Default),
     257             :     cl::values(clEnumValN(DebuggerKind::GDB, "gdb", "gdb"),
     258             :                clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"),
     259             :                clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)")));
     260             : 
     261             : static cl::opt<bool> EnableStackSizeSection(
     262             :     "stack-size-section",
     263             :     cl::desc("Emit a section containing stack size metadata"), cl::init(false));
     264             : 
     265             : static cl::opt<bool>
     266             :     EnableAddrsig("addrsig", cl::desc("Emit an address-significance table"),
     267             :                   cl::init(false));
     268             : 
     269             : // Common utility function tightly tied to the options listed here. Initializes
     270             : // a TargetOptions object with CodeGen flags and returns it.
     271       32827 : static TargetOptions InitTargetOptionsFromCodeGenFlags() {
     272       32827 :   TargetOptions Options;
     273       32827 :   Options.AllowFPOpFusion = FuseFPOps;
     274       32827 :   Options.UnsafeFPMath = EnableUnsafeFPMath;
     275       32827 :   Options.NoInfsFPMath = EnableNoInfsFPMath;
     276       32827 :   Options.NoNaNsFPMath = EnableNoNaNsFPMath;
     277       32827 :   Options.NoSignedZerosFPMath = EnableNoSignedZerosFPMath;
     278       32827 :   Options.NoTrappingFPMath = EnableNoTrappingFPMath;
     279       32827 :   Options.FPDenormalMode = DenormalMode;
     280       32827 :   Options.HonorSignDependentRoundingFPMathOption =
     281             :       EnableHonorSignDependentRoundingFPMath;
     282       32827 :   if (FloatABIForCalls != FloatABI::Default)
     283         109 :     Options.FloatABIType = FloatABIForCalls;
     284       32827 :   Options.NoZerosInBSS = DontPlaceZerosInBSS;
     285       32827 :   Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
     286       32827 :   Options.StackAlignmentOverride = OverrideStackAlignment;
     287       32827 :   Options.StackSymbolOrdering = StackSymbolOrdering;
     288       32827 :   Options.UseInitArray = !UseCtors;
     289       32827 :   Options.RelaxELFRelocations = RelaxELFRelocations;
     290       32827 :   Options.DataSections = DataSections;
     291       32827 :   Options.FunctionSections = FunctionSections;
     292       32827 :   Options.UniqueSectionNames = UniqueSectionNames;
     293       32827 :   Options.EmulatedTLS = EmulatedTLS;
     294       32827 :   Options.ExplicitEmulatedTLS = EmulatedTLS.getNumOccurrences() > 0;
     295       32827 :   Options.ExceptionModel = ExceptionModel;
     296       32827 :   Options.EmitStackSizeSection = EnableStackSizeSection;
     297       32827 :   Options.EmitAddrsig = EnableAddrsig;
     298             : 
     299       32827 :   Options.MCOptions = InitMCTargetOptionsFromFlags();
     300             : 
     301       32827 :   Options.ThreadModel = TMModel;
     302       32827 :   Options.EABIVersion = EABIVersion;
     303       32827 :   Options.DebuggerTuning = DebuggerTuningOpt;
     304             : 
     305       32827 :   return Options;
     306             : }
     307             : 
     308       25336 : LLVM_ATTRIBUTE_UNUSED static std::string getCPUStr() {
     309             :   // If user asked for the 'native' CPU, autodetect here. If autodection fails,
     310             :   // this will set the CPU to an empty string which tells the target to
     311             :   // pick a basic default.
     312       25336 :   if (MCPU == "native")
     313           0 :     return sys::getHostCPUName();
     314             : 
     315             :   return MCPU;
     316             : }
     317             : 
     318       24975 : LLVM_ATTRIBUTE_UNUSED static std::string getFeaturesStr() {
     319       24975 :   SubtargetFeatures Features;
     320             : 
     321             :   // If user asked for the 'native' CPU, we need to autodetect features.
     322             :   // This is necessary for x86 where the CPU might not support all the
     323             :   // features the autodetected CPU name lists in the target. For example,
     324             :   // not all Sandybridge processors support AVX.
     325       24975 :   if (MCPU == "native") {
     326           0 :     StringMap<bool> HostFeatures;
     327           0 :     if (sys::getHostCPUFeatures(HostFeatures))
     328           0 :       for (auto &F : HostFeatures)
     329           0 :         Features.AddFeature(F.first(), F.second);
     330             :   }
     331             : 
     332       66658 :   for (unsigned i = 0; i != MAttrs.size(); ++i)
     333        8354 :     Features.AddFeature(MAttrs[i]);
     334             : 
     335       24975 :   return Features.getString();
     336             : }
     337             : 
     338         194 : LLVM_ATTRIBUTE_UNUSED static std::vector<std::string> getFeatureList() {
     339         194 :   SubtargetFeatures Features;
     340             : 
     341             :   // If user asked for the 'native' CPU, we need to autodetect features.
     342             :   // This is necessary for x86 where the CPU might not support all the
     343             :   // features the autodetected CPU name lists in the target. For example,
     344             :   // not all Sandybridge processors support AVX.
     345         194 :   if (MCPU == "native") {
     346           0 :     StringMap<bool> HostFeatures;
     347           0 :     if (sys::getHostCPUFeatures(HostFeatures))
     348           0 :       for (auto &F : HostFeatures)
     349           0 :         Features.AddFeature(F.first(), F.second);
     350             :   }
     351             : 
     352         388 :   for (unsigned i = 0; i != MAttrs.size(); ++i)
     353           0 :     Features.AddFeature(MAttrs[i]);
     354             : 
     355         194 :   return Features.getFeatures();
     356             : }
     357             : 
     358             : /// Set function attributes of functions in Module M based on CPU,
     359             : /// Features, and command line flags.
     360             : LLVM_ATTRIBUTE_UNUSED static void
     361       31938 : setFunctionAttributes(StringRef CPU, StringRef Features, Module &M) {
     362      345205 :   for (auto &F : M) {
     363      313267 :     auto &Ctx = F.getContext();
     364      313267 :     AttributeList Attrs = F.getAttributes();
     365             :     AttrBuilder NewAttrs;
     366             : 
     367      313267 :     if (!CPU.empty())
     368       89841 :       NewAttrs.addAttribute("target-cpu", CPU);
     369      313267 :     if (!Features.empty())
     370      132475 :       NewAttrs.addAttribute("target-features", Features);
     371      313267 :     if (DisableFPElim.getNumOccurrences() > 0)
     372             :       NewAttrs.addAttribute("no-frame-pointer-elim",
     373        2058 :                             DisableFPElim ? "true" : "false");
     374      313267 :     if (DisableTailCalls.getNumOccurrences() > 0)
     375             :       NewAttrs.addAttribute("disable-tail-calls",
     376          36 :                             toStringRef(DisableTailCalls));
     377      313267 :     if (StackRealign)
     378         168 :       NewAttrs.addAttribute("stackrealign");
     379             : 
     380      313267 :     if (TrapFuncName.getNumOccurrences() > 0)
     381          19 :       for (auto &B : F)
     382          21 :         for (auto &I : B)
     383             :           if (auto *Call = dyn_cast<CallInst>(&I))
     384             :             if (const auto *F = Call->getCalledFunction())
     385           7 :               if (F->getIntrinsicID() == Intrinsic::debugtrap ||
     386             :                   F->getIntrinsicID() == Intrinsic::trap)
     387          14 :                 Call->addAttribute(
     388             :                     llvm::AttributeList::FunctionIndex,
     389             :                     Attribute::get(Ctx, "trap-func-name", TrapFuncName));
     390             : 
     391             :     // Let NewAttrs override Attrs.
     392      313267 :     F.setAttributes(
     393             :         Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs));
     394             :   }
     395       31938 : }

Generated by: LCOV version 1.13