[SPIRV] Fix code quality issues. (llvm#160752)

Address issues reported by a static analysis tool.

Author: maarquitos14

llvm/lib/Target/SPIRV/SPIRVLegalizerInfo.cpp

@@ -587,7 +587,8 @@ bool SPIRVLegalizerInfo::legalizeIsFPClass(
   }
 
   if (FPClassTest PartialCheck = Mask & fcNan) {
-    auto InfWithQnanBitC = buildSPIRVConstant(IntTy, Inf | QNaNBitMask);
+    auto InfWithQnanBitC =
+        buildSPIRVConstant(IntTy, std::move(Inf) | QNaNBitMask);
     if (PartialCheck == fcNan) {
       // isnan(V) ==> abs(V) u> int(inf)
       appendToRes(
@@ -613,7 +614,7 @@ bool SPIRVLegalizerInfo::legalizeIsFPClass(
     APInt ExpLSB = ExpMask & ~(ExpMask.shl(1));
     auto ExpMinusOne = assignSPIRVTy(
         MIRBuilder.buildSub(IntTy, Abs, buildSPIRVConstant(IntTy, ExpLSB)));
-    APInt MaxExpMinusOne = ExpMask - ExpLSB;
+    APInt MaxExpMinusOne = std::move(ExpMask) - ExpLSB;
     auto NormalRes = assignSPIRVTy(
         MIRBuilder.buildICmp(CmpInst::Predicate::ICMP_ULT, DstTy, ExpMinusOne,
                              buildSPIRVConstant(IntTy, MaxExpMinusOne)));