[Sema] Don't use dyn_cast to detect an AtomicType
An AtomicType might be hidden behind arbitrary levels of typedefs.
getAs<> will reliably walk through the sugar to get the underlying
AtomicType.
This fixes PR23638.
llvm-svn: 238083
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index a64932b..23a6fc3 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -6100,7 +6100,7 @@
// TODO: Investigate using GetExprRange() to get tighter bounds
// on the bit ranges.
QualType OtherT = Other->getType();
- if (const AtomicType *AT = dyn_cast<AtomicType>(OtherT))
+ if (const auto *AT = OtherT->getAs<AtomicType>())
OtherT = AT->getValueType();
IntRange OtherRange = IntRange::forValueOfType(S.Context, OtherT);
unsigned OtherWidth = OtherRange.Width;