[LLVM][IR][NFC] Simplify writeDIGenericSubrange

[gAlfonso-bit]

Summary

The expression at the end is needlessly complex so I have simplified it.

[gAlfonso-bit]

Added context to patch

llvm/lib/IR/AsmWriter.cpp

static void writeDIGenericSubrange(raw_ostream &Out, const DIGenericSubrange *N,
                                    TypePrinting *TypePrinter,
                                    SlotTracker *Machine,
                                    const Module *Context) {
   Out << "!DIGenericSubrange(";
   MDFieldPrinter Printer(Out, TypePrinter, Machine, Context);
 
   auto IsConstant = [&](Metadata *Bound) -> bool {
     if (auto *BE = dyn_cast_or_null<DIExpression>(Bound)) {
-      return BE->isConstant()
-                 ? DIExpression::SignedOrUnsignedConstant::SignedConstant ==
-                       *BE->isConstant()
-                 : false;
+      return BE->isConstant() &&
+             DIExpression::SignedOrUnsignedConstant::SignedConstant ==
+                 *BE->isConstant();
     }
     return false;
   };
 
   auto GetConstant = [&](Metadata *Bound) -> int64_t {
     assert(IsConstant(Bound) && "Expected constant");
     auto *BE = dyn_cast_or_null<DIExpression>(Bound);
     return static_cast<int64_t>(BE->getElement(1));