DIBuilder: Stop abusing DIExpressionIterator::operator*(), NFC

This code was confusing, since it created a `DIExpressionIterator` from
an invalid start point (although it wasn't wrong: it never actually
iterated).  Now that the underlying iterator has `getNumber()`, just use
it directly.

llvm-svn: 226773

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/include/llvm/IR/DebugInfo.h b/llvm/include/llvm/IR/DebugInfo.h
index fc4d95cfc14..f42a8ebd884 100644
--- a/llvm/include/llvm/IR/DebugInfo.h
+++ b/llvm/include/llvm/IR/DebugInfo.h
@@ -910,7 +910,7 @@ public:
   uint64_t getArg(unsigned N) const {
     auto In = I;
     std::advance(In, N);
-    return *DIExpressionIterator(In);
+    return In.getNumber<uint64_t>();
   }
 
   const DIHeaderFieldIterator& getBase() const { return I; }