Fix parameter name comments using clang-tidy. NFC.

This patch applies clang-tidy's bugprone-argument-comment tool
to LLVM, clang and lld source trees. Here is how I created this
patch:

$ git clone https://github.com/llvm/llvm-project.git
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_ENABLE_PROJECTS='clang;lld;clang-tools-extra' \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=On -DLLVM_ENABLE_LLD=On \
    -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../llvm
$ ninja
$ parallel clang-tidy -checks='-*,bugprone-argument-comment' \
    -config='{CheckOptions: [{key: StrictMode, value: 1}]}' -fix \
    ::: ../llvm/lib/**/*.{cpp,h} ../clang/lib/**/*.{cpp,h} ../lld/**/*.{cpp,h}

llvm-svn: 366177
diff --git a/llvm/lib/Target/AArch64/AArch64FastISel.cpp b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
index 9119461..8dc2768 100644
--- a/llvm/lib/Target/AArch64/AArch64FastISel.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
@@ -2365,7 +2365,7 @@
                                         AArch64::sub_32);
 
   if ((BW < 32) && !IsBitTest)
-    SrcReg = emitIntExt(VT, SrcReg, MVT::i32, /*IsZExt=*/true);
+    SrcReg = emitIntExt(VT, SrcReg, MVT::i32, /*isZExt=*/true);
 
   // Emit the combined compare and branch instruction.
   SrcReg = constrainOperandRegClass(II, SrcReg,  II.getNumDefs());
@@ -4272,7 +4272,7 @@
   const TargetRegisterClass *RC =
       (RetVT == MVT::i64) ? &AArch64::GPR64RegClass : &AArch64::GPR32RegClass;
   if (NeedTrunc) {
-    Op0Reg = emitIntExt(RetVT, Op0Reg, MVT::i32, /*IsZExt=*/false);
+    Op0Reg = emitIntExt(RetVT, Op0Reg, MVT::i32, /*isZExt=*/false);
     Op1Reg = emitAnd_ri(MVT::i32, Op1Reg, Op1IsKill, Mask);
     Op0IsKill = Op1IsKill = true;
   }
@@ -4952,7 +4952,7 @@
   MVT PtrVT = TLI.getPointerTy(DL);
   EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false);
   if (IdxVT.bitsLT(PtrVT)) {
-    IdxN = emitIntExt(IdxVT.getSimpleVT(), IdxN, PtrVT, /*IsZExt=*/false);
+    IdxN = emitIntExt(IdxVT.getSimpleVT(), IdxN, PtrVT, /*isZExt=*/false);
     IdxNIsKill = true;
   } else if (IdxVT.bitsGT(PtrVT))
     llvm_unreachable("AArch64 FastISel doesn't support types larger than i64");
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUOpenCLEnqueuedBlockLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUOpenCLEnqueuedBlockLowering.cpp
index 50871e1..f723147 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUOpenCLEnqueuedBlockLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUOpenCLEnqueuedBlockLowering.cpp
@@ -119,11 +119,11 @@
       auto T = ArrayType::get(Type::getInt64Ty(C), 2);
       auto *GV = new GlobalVariable(
           M, T,
-          /*IsConstant=*/false, GlobalValue::ExternalLinkage,
+          /*isConstant=*/false, GlobalValue::ExternalLinkage,
           /*Initializer=*/Constant::getNullValue(T), RuntimeHandle,
           /*InsertBefore=*/nullptr, GlobalValue::NotThreadLocal,
           AMDGPUAS::GLOBAL_ADDRESS,
-          /*IsExternallyInitialized=*/false);
+          /*isExternallyInitialized=*/false);
       LLVM_DEBUG(dbgs() << "runtime handle created: " << *GV << '\n');
 
       for (auto U : F.users()) {
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 4eb8e07..09b7811 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -2259,7 +2259,7 @@
         unsigned TargetFlags = GV->hasDLLImportStorageClass()
                                    ? ARMII::MO_DLLIMPORT
                                    : ARMII::MO_NO_FLAG;
-        Callee = DAG.getTargetGlobalAddress(GV, dl, PtrVt, /*Offset=*/0,
+        Callee = DAG.getTargetGlobalAddress(GV, dl, PtrVt, /*offset=*/0,
                                             TargetFlags);
         if (GV->hasDLLImportStorageClass())
           Callee =
@@ -2914,7 +2914,7 @@
     auto M = const_cast<Module*>(DAG.getMachineFunction().
                                  getFunction().getParent());
     auto GV = new GlobalVariable(
-                    *M, T, /*isConst=*/true, GlobalVariable::InternalLinkage, C,
+                    *M, T, /*isConstant=*/true, GlobalVariable::InternalLinkage, C,
                     Twine(DAG.getDataLayout().getPrivateGlobalPrefix()) + "CP" +
                     Twine(DAG.getMachineFunction().getFunctionNumber()) + "_" +
                     Twine(AFI->createPICLabelUId())
@@ -3467,7 +3467,7 @@
   // FIXME: Once remat is capable of dealing with instructions with register
   // operands, expand this into two nodes.
   Result = DAG.getNode(ARMISD::Wrapper, DL, PtrVT,
-                       DAG.getTargetGlobalAddress(GV, DL, PtrVT, /*Offset=*/0,
+                       DAG.getTargetGlobalAddress(GV, DL, PtrVT, /*offset=*/0,
                                                   TargetFlags));
   if (TargetFlags & (ARMII::MO_DLLIMPORT | ARMII::MO_COFFSTUB))
     Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Result,
diff --git a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp
index d983ef2..4313fa5 100644
--- a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp
+++ b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiELFObjectWriter.cpp
@@ -34,7 +34,7 @@
 
 LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
     : MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
-                              /*HasRelocationAddend=*/true) {}
+                              /*HasRelocationAddend_=*/true) {}
 
 unsigned LanaiELFObjectWriter::getRelocType(MCContext & /*Ctx*/,
                                             const MCValue & /*Target*/,
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
index 13bd7ee..8d8ba56 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
@@ -36,8 +36,8 @@
 } // end anonymous namespace
 
 SystemZObjectWriter::SystemZObjectWriter(uint8_t OSABI)
-  : MCELFObjectTargetWriter(/*Is64Bit=*/true, OSABI, ELF::EM_S390,
-                            /*HasRelocationAddend=*/ true) {}
+  : MCELFObjectTargetWriter(/*Is64Bit_=*/true, OSABI, ELF::EM_S390,
+                            /*HasRelocationAddend_=*/ true) {}
 
 // Return the relocation type for an absolute value of MCFixupKind Kind.
 static unsigned getAbsoluteReloc(unsigned Kind) {
diff --git a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
index a439b72..b5d4d36 100644
--- a/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
+++ b/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
@@ -194,7 +194,7 @@
   static const size_t BufBytes = 128;
   char Buf[BufBytes];
   auto Written = FP.convertToHexString(
-      Buf, /*hexDigits=*/0, /*upperCase=*/false, APFloat::rmNearestTiesToEven);
+      Buf, /*HexDigits=*/0, /*UpperCase=*/false, APFloat::rmNearestTiesToEven);
   (void)Written;
   assert(Written != 0);
   assert(Written < BufBytes);
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
index 1a24f74..312b203 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
@@ -115,7 +115,7 @@
 private:
   // Utility helper routines
   MVT::SimpleValueType getSimpleType(Type *Ty) {
-    EVT VT = TLI.getValueType(DL, Ty, /*HandleUnknown=*/true);
+    EVT VT = TLI.getValueType(DL, Ty, /*AllowUnknown=*/true);
     return VT.isSimple() ? VT.getSimpleVT().SimpleTy
                          : MVT::INVALID_SIMPLE_VALUE_TYPE;
   }
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRegisterInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRegisterInfo.cpp
index 0bfebc3..ea9cfc0 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyRegisterInfo.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyRegisterInfo.cpp
@@ -81,7 +81,7 @@
     if (static_cast<uint64_t>(Offset) <= std::numeric_limits<uint32_t>::max()) {
       MI.getOperand(OffsetOperandNum).setImm(Offset);
       MI.getOperand(FIOperandNum)
-          .ChangeToRegister(FrameRegister, /*IsDef=*/false);
+          .ChangeToRegister(FrameRegister, /*isDef=*/false);
       return;
     }
   }
@@ -102,7 +102,7 @@
           MachineOperand &ImmMO = Def->getOperand(1);
           ImmMO.setImm(ImmMO.getImm() + uint32_t(FrameOffset));
           MI.getOperand(FIOperandNum)
-              .ChangeToRegister(FrameRegister, /*IsDef=*/false);
+              .ChangeToRegister(FrameRegister, /*isDef=*/false);
           return;
         }
       }
@@ -127,7 +127,7 @@
         .addReg(FrameRegister)
         .addReg(OffsetOp);
   }
-  MI.getOperand(FIOperandNum).ChangeToRegister(FIRegOperand, /*IsDef=*/false);
+  MI.getOperand(FIOperandNum).ChangeToRegister(FIRegOperand, /*isDef=*/false);
 }
 
 Register
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index 31cd83d..7b9ce02 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -289,7 +289,7 @@
 }
 
 bool X86FastISel::isTypeLegal(Type *Ty, MVT &VT, bool AllowI1) {
-  EVT evt = TLI.getValueType(DL, Ty, /*HandleUnknown=*/true);
+  EVT evt = TLI.getValueType(DL, Ty, /*AllowUnknown=*/true);
   if (evt == MVT::Other || !evt.isSimple())
     // Unhandled type. Halt "fast" selection and bail.
     return false;
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp
index f50e91f..e310fe0 100644
--- a/llvm/lib/Target/X86/X86FrameLowering.cpp
+++ b/llvm/lib/Target/X86/X86FrameLowering.cpp
@@ -3170,7 +3170,7 @@
   MinFixedObjOffset -= std::abs(MinFixedObjOffset) % 8;
   int64_t UnwindHelpOffset = MinFixedObjOffset - SlotSize;
   int UnwindHelpFI =
-      MFI.CreateFixedObject(SlotSize, UnwindHelpOffset, /*Immutable=*/false);
+      MFI.CreateFixedObject(SlotSize, UnwindHelpOffset, /*IsImmutable=*/false);
   EHInfo.UnwindHelpFrameIdx = UnwindHelpFI;
 
   // Store -2 into UnwindHelp on function entry. We have to scan forwards past
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 34a8580..23926ca 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -3021,7 +3021,7 @@
       // load from our portion of it. This assumes that if the first part of an
       // argument is in memory, the rest will also be in memory.
       int FI = MFI.CreateFixedObject(ArgVT.getStoreSize(), VA.getLocMemOffset(),
-                                     /*Immutable=*/false);
+                                     /*IsImmutable=*/false);
       PartAddr = DAG.getFrameIndex(FI, PtrVT);
       return DAG.getLoad(
           ValVT, dl, Chain, PartAddr,
@@ -23719,7 +23719,7 @@
       // Set up a frame object for the return address.
       unsigned SlotSize = RegInfo->getSlotSize();
       FrameAddrIndex = MF.getFrameInfo().CreateFixedObject(
-          SlotSize, /*Offset=*/0, /*IsImmutable=*/false);
+          SlotSize, /*SPOffset=*/0, /*IsImmutable=*/false);
       FuncInfo->setFAIndex(FrameAddrIndex);
     }
     return DAG.getFrameIndex(FrameAddrIndex, VT);
diff --git a/llvm/lib/Target/X86/X86WinAllocaExpander.cpp b/llvm/lib/Target/X86/X86WinAllocaExpander.cpp
index 22d168c..9e499db 100644
--- a/llvm/lib/Target/X86/X86WinAllocaExpander.cpp
+++ b/llvm/lib/Target/X86/X86WinAllocaExpander.cpp
@@ -250,7 +250,7 @@
 
       // Do the probe.
       STI->getFrameLowering()->emitStackProbe(*MBB->getParent(), *MBB, MI, DL,
-                                              /*InPrologue=*/false);
+                                              /*InProlog=*/false);
     } else {
       // Sub
       BuildMI(*MBB, I, DL,