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-rw-r--r--lib/CodeGen/CGExprComplex.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/CGExprComplex.cpp b/lib/CodeGen/CGExprComplex.cpp
index d58db67917..b4b1b1d5f9 100644
--- a/lib/CodeGen/CGExprComplex.cpp
+++ b/lib/CodeGen/CGExprComplex.cpp
@@ -358,6 +358,10 @@ ComplexPairTy ComplexExprEmitter::EmitCast(CastExpr::CastKind CK, Expr *Op,
switch (CK) {
case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!");
+ // Atomic to non-atomic casts may be more than a no-op for some platforms and
+ // for some types.
+ case CK_AtomicToNonAtomic:
+ case CK_NonAtomicToAtomic:
case CK_NoOp:
case CK_LValueToRValue:
case CK_UserDefinedConversion: