[linux-port] Fix warnings from lambda functions (#1320)

Various lambda functions included captured variables that they
didn't actually use. This produces a warning on clang.
Fixes 6 clang warnings.

lib/Target/TargetMachine.cpp

@@ -150,7 +150,7 @@ void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const {
 }
 
 TargetIRAnalysis TargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](Function &F) {
+  return TargetIRAnalysis([](Function &F) {
     return TargetTransformInfo(F.getParent()->getDataLayout());
   });
 }

tools/clang/lib/AST/MicrosoftMangle.cpp

@@ -2713,14 +2713,14 @@ void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
     }
   };
 
-  auto GetLittleEndianByte = [&Mangler, &SL](unsigned Index) {
+  auto GetLittleEndianByte = [&SL](unsigned Index) {
     unsigned CharByteWidth = SL->getCharByteWidth();
     uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
     unsigned OffsetInCodeUnit = Index % CharByteWidth;
     return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
   };
 
-  auto GetBigEndianByte = [&Mangler, &SL](unsigned Index) {
+  auto GetBigEndianByte = [&SL](unsigned Index) {
     unsigned CharByteWidth = SL->getCharByteWidth();
     uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
     unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);

tools/clang/lib/CodeGen/CGStmtOpenMP.cpp

@@ -1954,7 +1954,7 @@ static void EmitOMPAtomicCaptureExpr(CodeGenFunction &CGF, bool IsSeqCst,
     NewVValType = XRValExpr->getType();
     auto *ERValExpr = IsXLHSInRHSPart ? RHS : LHS;
     auto &&Gen = [&CGF, &NewVVal, UE, ExprRValue, XRValExpr, ERValExpr,
-                  IsSeqCst, IsPostfixUpdate](RValue XRValue) -> RValue {
+                  IsPostfixUpdate](RValue XRValue) -> RValue {
       CodeGenFunction::OpaqueValueMapping MapExpr(CGF, ERValExpr, ExprRValue);
       CodeGenFunction::OpaqueValueMapping MapX(CGF, XRValExpr, XRValue);
       RValue Res = CGF.EmitAnyExpr(UE);
@@ -1981,7 +1981,7 @@ static void EmitOMPAtomicCaptureExpr(CodeGenFunction &CGF, bool IsSeqCst,
     NewVValType = X->getType().getNonReferenceType();
     ExprRValue = convertToType(CGF, ExprRValue, E->getType(),
                                X->getType().getNonReferenceType());
-    auto &&Gen = [&CGF, &NewVVal, ExprRValue](RValue XRValue) -> RValue {
+    auto &&Gen = [&NewVVal, ExprRValue](RValue XRValue) -> RValue {
       NewVVal = XRValue;
       return ExprRValue;
     };

tools/clang/lib/SPIRV/SPIRVEmitter.cpp

@@ -8527,7 +8527,7 @@ uint32_t SPIRVEmitter::processIntrinsicUsingGLSLInst(
     // If the instruction does not operate on matrices, we can perform the
     // instruction on each vector of the matrix.
     if (actPerRowForMatrices && TypeTranslator::isMxNMatrix(arg0->getType())) {
-      const auto actOnEachVec = [this, glslInstSetId, opcode, arg0Id, arg1Id,
+      const auto actOnEachVec = [this, glslInstSetId, opcode, arg1Id,
                                  arg2Id](uint32_t index, uint32_t vecType,
                                          uint32_t arg0RowId) {
         const uint32_t arg1RowId =