Refactor: Simplify boolean expressions

[LegalizeAdulthood]

Summary

Simplify expressions involving boolean constants with clang-tidy

[dblaikie]

Looks good to me - please commit. One or two optional comments.

lib/IR/InlineAsm.cpp

78

could drop the parens here (before/after/at the same time/not at all)

lib/MC/MCParser/DarwinAsmParser.cpp

629

aside: I wonder if this (& the previous function, getGenDwarfForAsembly) should be 'is' rather than 'get'

[LegalizeAdulthood]

lib/IR/InlineAsm.cpp

78

Fixed

lib/MC/MCParser/DarwinAsmParser.cpp

629

I'll leave that for someone else to decide :-).

[LegalizeAdulthood]

Remove unnecessary parenthesis

[LegalizeAdulthood]

If this is acceptable, would someone commit this for me please? Thanks.

[LegalizeAdulthood]

If this is acceptable, would someone commit this for me please? Thanks.

[dblaikie]

Sure - committed in r231617

lib/Analysis/ScalarEvolution.cpp

#if 0
       dbgs() << "HFTZ: " << *V << " - sol#1: " << *R1
              << "  sol#2: " << *R2 << "\n";
 #endif
       // Pick the smallest positive root value.
       if (ConstantInt *CB =
           dyn_cast<ConstantInt>(ConstantExpr::getICmp(CmpInst::ICMP_ULT,
                                                       R1->getValue(),
                                                       R2->getValue()))) {
-        if (CB->getZExtValue() == false)
+        if (!CB->getZExtValue())
           std::swap(R1, R2);   // R1 is the minimum root now.
 
         // We can only use this value if the chrec ends up with an exact zero
         // value at this index.  When solving for "X*X != 5", for example, we
         // should not accept a root of 2.
         const SCEV *Val = AddRec->evaluateAtIteration(R1, *this);
         if (Val->isZero())
           return R1;  // We found a quadratic root!
std::pair<const SCEV *,const SCEV *> Roots =
       SolveQuadraticEquation(cast<SCEVAddRecExpr>(NewAddRec), SE);
     const SCEVConstant *R1 = dyn_cast<SCEVConstant>(Roots.first);
     const SCEVConstant *R2 = dyn_cast<SCEVConstant>(Roots.second);
     if (R1) {
       // Pick the smallest positive root value.
       if (ConstantInt *CB =
           dyn_cast<ConstantInt>(ConstantExpr::getICmp(ICmpInst::ICMP_ULT,
                          R1->getValue(), R2->getValue()))) {
-        if (CB->getZExtValue() == false)
+        if (!CB->getZExtValue())
           std::swap(R1, R2);   // R1 is the minimum root now.
 
         // Make sure the root is not off by one.  The returned iteration should
         // not be in the range, but the previous one should be.  When solving
         // for "X*X < 5", for example, we should not return a root of 2.
         ConstantInt *R1Val = EvaluateConstantChrecAtConstant(this,
                                                              R1->getValue(),
                                                              SE);

lib/Bitcode/Reader/BitstreamReader.cpp

unsigned BitstreamCursor::readRecord(unsigned AbbrevID,
   return Code;
 }
 
 
 void BitstreamCursor::ReadAbbrevRecord() {
   BitCodeAbbrev *Abbv = new BitCodeAbbrev();
   unsigned NumOpInfo = ReadVBR(5);
   for (unsigned i = 0; i != NumOpInfo; ++i) {
-    bool IsLiteral = Read(1) ? true : false;
+    bool IsLiteral = Read(1);
     if (IsLiteral) {
       Abbv->Add(BitCodeAbbrevOp(ReadVBR64(8)));
       continue;
     }
 
     BitCodeAbbrevOp::Encoding E = (BitCodeAbbrevOp::Encoding)Read(3);
     if (BitCodeAbbrevOp::hasEncodingData(E)) {
       uint64_t Data = ReadVBR64(5);

lib/CodeGen/CodeGenPrepare.cpp

 /// \endcode
 /// This usually allows instruction selection to do even further optimizations
 /// and combine the compare with the branch instruction. Currently this is
 /// applied for targets which have "cheap" jump instructions.
 ///
 /// FIXME: Remove the (equivalent?) implementation in SelectionDAG.
 ///
 bool CodeGenPrepare::splitBranchCondition(Function &F) {
-  if (!TM || TM->Options.EnableFastISel != true ||
+  if (!TM || !TM->Options.EnableFastISel ||
       !TLI || TLI->isJumpExpensive())
     return false;
 
   bool MadeChange = false;
   for (auto &BB : F) {
     // Does this BB end with the following?
     //   %cond1 = icmp|fcmp|binary instruction ...
     //   %cond2 = icmp|fcmp|binary instruction ...

lib/CodeGen/IfConversion.cpp

static bool IfcvtTokenCmp(IfcvtToken *C1, IfcvtToken *C2) {
       int Incr1 = (C1->Kind == ICDiamond)
         ? -(int)(C1->NumDups + C1->NumDups2) : (int)C1->NumDups;
       int Incr2 = (C2->Kind == ICDiamond)
         ? -(int)(C2->NumDups + C2->NumDups2) : (int)C2->NumDups;
       if (Incr1 > Incr2)
         return true;
       else if (Incr1 == Incr2) {
         // Favors subsumption.
-        if (C1->NeedSubsumption == false && C2->NeedSubsumption == true)
+        if (!C1->NeedSubsumption && C2->NeedSubsumption)
           return true;
         else if (C1->NeedSubsumption == C2->NeedSubsumption) {
           // Favors diamond over triangle, etc.
           if ((unsigned)C1->Kind < (unsigned)C2->Kind)
             return true;
           else if (C1->Kind == C2->Kind)
             return C1->BBI.BB->getNumber() < C2->BBI.BB->getNumber();
         }

lib/CodeGen/PeepholeOptimizer.cpp

if (CpyRewriter->RewriteCurrentSource(NewSrc, NewSubReg)) {
       Changed = true;
     }
   }
   // TODO: We could have a clean-up method to tidy the instruction.
   // E.g., v0 = INSERT_SUBREG v1, v1.sub0, sub0
   // => v0 = COPY v1
   // Currently we haven't seen motivating example for that and we
   // want to avoid untested code.
-  NumRewrittenCopies += Changed == true;
+  NumRewrittenCopies += Changed;
   return Changed;
 }
 
 /// \brief Optimize copy-like instructions to create
 /// register coalescer friendly instruction.
 /// The optimization tries to kill-off the \p MI by looking
 /// through a chain of copies to find a source that has a compatible
 /// register class.

lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp

if (RelType == ELF::R_PPC64_REL24) {
           if (Value.SymbolName)
             addRelocationForSymbol(RE, Value.SymbolName);
           else
             addRelocationForSection(RE, Value.SectionID);
         } else {
           RangeOverflow = true;
         }
       }
-      if (SymType == SymbolRef::ST_Unknown || RangeOverflow == true) {
+      if (SymType == SymbolRef::ST_Unknown || RangeOverflow) {
         // It is an external symbol (SymbolRef::ST_Unknown) or within a range
         // larger than 24-bits.
         StubMap::const_iterator i = Stubs.find(Value);
         if (i != Stubs.end()) {
           // Symbol function stub already created, just relocate to it
           resolveRelocation(Section, Offset,
                             (uint64_t)Section.Address + i->second, RelType, 0);
           DEBUG(dbgs() << " Stub function found\n");

lib/IR/DiagnosticInfo.cpp

void DiagnosticInfoSampleProfile::print(DiagnosticPrinter &DP) const {
   if (getFileName() && getLineNum() > 0)
     DP << getFileName() << ":" << getLineNum() << ": ";
   else if (getFileName())
     DP << getFileName() << ": ";
   DP << getMsg();
 }
 
 bool DiagnosticInfoOptimizationBase::isLocationAvailable() const {
-  return getDebugLoc().isUnknown() == false;
+  return !getDebugLoc().isUnknown();
 }
 
 void DiagnosticInfoOptimizationBase::getLocation(StringRef *Filename,
                                                  unsigned *Line,
                                                  unsigned *Column) const {
   DILocation DIL(getDebugLoc().getAsMDNode(getFunction().getContext()));
   *Filename = DIL.getFilename();
   *Line = DIL.getLineNumber();

lib/IR/InlineAsm.cpp

 bool InlineAsm::ConstraintInfo::Parse(StringRef Str,
                      InlineAsm::ConstraintInfoVector &ConstraintsSoFar) {
   StringRef::iterator I = Str.begin(), E = Str.end();
   unsigned multipleAlternativeCount = Str.count('|') + 1;
   unsigned multipleAlternativeIndex = 0;
   ConstraintCodeVector *pCodes = &Codes;
 
   // Initialize
-  isMultipleAlternative = (multipleAlternativeCount > 1 ? true : false);
+  isMultipleAlternative = (multipleAlternativeCount > 1);
   if (isMultipleAlternative) {
     multipleAlternatives.resize(multipleAlternativeCount);
     pCodes = &multipleAlternatives[0].Codes;
   }
   Type = isInput;
   isEarlyClobber = false;
   MatchingInput = -1;
   isCommutative = false;

lib/IR/Verifier.cpp

 /// This method returns true on error and does not print an error message.
 bool
 Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
                                   ArrayRef<Intrinsic::IITDescriptor> &Infos) {
   using namespace Intrinsic;
 
   // If there are no descriptors left, then it can't be a vararg.
   if (Infos.empty())
-    return isVarArg ? true : false;
+    return isVarArg;
 
   // There should be only one descriptor remaining at this point.
   if (Infos.size() != 1)
     return true;
 
   // Check and verify the descriptor.
   IITDescriptor D = Infos.front();
   Infos = Infos.slice(1);
   if (D.Kind == IITDescriptor::VarArg)
-    return isVarArg ? false : true;
+    return !isVarArg;
 
   return true;
 }
 
 /// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
 ///
 void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
   Function *IF = CI.getCalledFunction();

lib/MC/MCParser/AsmParser.cpp

bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
   }
 
   if (getLexer().isNot(AsmToken::EndOfStatement))
     return TokError("unexpected token in '.file' directive");
 
   if (FileNumber == -1)
     getStreamer().EmitFileDirective(Filename);
   else {
-    if (getContext().getGenDwarfForAssembly() == true)
+    if (getContext().getGenDwarfForAssembly())
       Error(DirectiveLoc,
             "input can't have .file dwarf directives when -g is "
             "used to generate dwarf debug info for assembly code");
 
     if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename) ==
         0)
       Error(FileNumberLoc, "file number already allocated");
   }

lib/MC/MCParser/DarwinAsmParser.cpp

 
 /// ParseDirectiveSecureLogUnique
 ///  ::= .secure_log_unique ... message ...
 bool DarwinAsmParser::parseDirectiveSecureLogUnique(StringRef, SMLoc IDLoc) {
   StringRef LogMessage = getParser().parseStringToEndOfStatement();
   if (getLexer().isNot(AsmToken::EndOfStatement))
     return TokError("unexpected token in '.secure_log_unique' directive");
 
-  if (getContext().getSecureLogUsed() != false)
+  if (getContext().getSecureLogUsed())
     return Error(IDLoc, ".secure_log_unique specified multiple times");
 
   // Get the secure log path.
   const char *SecureLogFile = getContext().getSecureLogFile();
   if (!SecureLogFile)
     return Error(IDLoc, ".secure_log_unique used but AS_SECURE_LOG_FILE "
                  "environment variable unset.");
 

lib/Support/APFloat.cpp

if (lost_fraction == lfExactlyHalf && category != fcZero)
       return APInt::tcExtractBit(significandParts(), bit);
 
     return false;
 
   case rmTowardZero:
     return false;
 
   case rmTowardPositive:
-    return sign == false;
+    return !sign;
 
   case rmTowardNegative:
-    return sign == true;
+    return sign;
   }
   llvm_unreachable("Invalid rounding mode found");
 }
 
 APFloat::opStatus
 APFloat::normalize(roundingMode rounding_mode,
                    lostFraction lost_fraction)
 {

lib/Support/CommandLine.cpp

protected:
   }
 
 public:
   explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {}
   virtual ~HelpPrinter() {}
 
   // Invoke the printer.
   void operator=(bool Value) {
-    if (Value == false)
+    if (!Value)
       return;
 
     StrOptionPairVector Opts;
     sortOpts(GlobalParser->OptionsMap, Opts, ShowHidden);
 
     if (GlobalParser->ProgramOverview)
       outs() << "OVERVIEW: " << GlobalParser->ProgramOverview << "\n";
 
static cl::opt<bool> PrintOptions(
     cl::Hidden, cl::init(false), cl::cat(GenericCategory));
 
 static cl::opt<bool> PrintAllOptions(
     "print-all-options",
     cl::desc("Print all option values after command line parsing"), cl::Hidden,
     cl::init(false), cl::cat(GenericCategory));
 
 void HelpPrinterWrapper::operator=(bool Value) {
-  if (Value == false)
+  if (!Value)
     return;
 
   // Decide which printer to invoke. If more than one option category is
   // registered then it is useful to show the categorized help instead of
   // uncategorized help.
   if (GlobalParser->RegisteredOptionCategories.size() > 1) {
     // unhide -help-list option so user can have uncategorized output if they
     // want it.

lib/Target/NVPTX/NVPTXLowerAggrCopies.cpp

bool NVPTXLowerAggrCopies::runOnFunction(Function &F) {
   //
   //const BasicBlock *firstBB = &F.front();  // first BB in F
   for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI) {
     //BasicBlock *bb = BI;
     for (BasicBlock::iterator II = BI->begin(), IE = BI->end(); II != IE;
          ++II) {
       if (LoadInst *load = dyn_cast<LoadInst>(II)) {
 
-        if (load->hasOneUse() == false)
+        if (!load->hasOneUse())
           continue;
 
         if (DL.getTypeStoreSize(load->getType()) < MaxAggrCopySize)
           continue;
 
         User *use = load->user_back();
         if (StoreInst *store = dyn_cast<StoreInst>(use)) {
           if (store->getOperand(0) != load) //getValueOperand

lib/Transforms/InstCombine/InstCombineSelect.cpp

if (ConstantInt *C = dyn_cast<ConstantInt>(TrueVal)) {
         // Change: A = select B, true, C --> A = or B, C
         return BinaryOperator::CreateOr(CondVal, FalseVal);
       }
       // Change: A = select B, false, C --> A = and !B, C
       Value *NotCond = Builder->CreateNot(CondVal, "not."+CondVal->getName());
       return BinaryOperator::CreateAnd(NotCond, FalseVal);
     }
     if (ConstantInt *C = dyn_cast<ConstantInt>(FalseVal)) {
-      if (C->getZExtValue() == false) {
+      if (!C->getZExtValue()) {
         // Change: A = select B, C, false --> A = and B, C
         return BinaryOperator::CreateAnd(CondVal, TrueVal);
       }
       // Change: A = select B, C, true --> A = or !B, C
       Value *NotCond = Builder->CreateNot(CondVal, "not."+CondVal->getName());
       return BinaryOperator::CreateOr(NotCond, TrueVal);
     }